diff --git a/.gitignore b/.gitignore
index cc70659661a774cb2c6940cdb09c669a4daf1053..66c546eb588e93cf77dd2565fa01d024ffca7520 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ libs
 objs
 
 # Python items
+python_build/
 .coverage*
 .eggs
 .tox
diff --git a/BUILD b/BUILD
index fa19d3d0e368984d38d72585a0f1ca7aad0e6c7e..459aebd820d021833ce22c582b7894f8b00000b7 100644
--- a/BUILD
+++ b/BUILD
@@ -125,6 +125,26 @@ cc_library(
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
+    "include/grpc/impl/codegen/alloc.h",
+    "include/grpc/impl/codegen/atm.h",
+    "include/grpc/impl/codegen/atm_gcc_atomic.h",
+    "include/grpc/impl/codegen/atm_gcc_sync.h",
+    "include/grpc/impl/codegen/atm_win32.h",
+    "include/grpc/impl/codegen/byte_buffer.h",
+    "include/grpc/impl/codegen/compression_types.h",
+    "include/grpc/impl/codegen/connectivity_state.h",
+    "include/grpc/impl/codegen/grpc_types.h",
+    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/port_platform.h",
+    "include/grpc/impl/codegen/propagation_bits.h",
+    "include/grpc/impl/codegen/slice.h",
+    "include/grpc/impl/codegen/slice_buffer.h",
+    "include/grpc/impl/codegen/status.h",
+    "include/grpc/impl/codegen/sync.h",
+    "include/grpc/impl/codegen/sync_generic.h",
+    "include/grpc/impl/codegen/sync_posix.h",
+    "include/grpc/impl/codegen/sync_win32.h",
+    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -781,6 +801,7 @@ cc_library(
     "src/cpp/util/status.cc",
     "src/cpp/util/string_ref.cc",
     "src/cpp/util/time.cc",
+    "src/cpp/codegen/grpc_library.cc",
   ],
   hdrs = [
     "include/grpc++/channel.h",
@@ -793,6 +814,7 @@ cc_library(
     "include/grpc++/impl/call.h",
     "include/grpc++/impl/client_unary_call.h",
     "include/grpc++/impl/grpc_library.h",
+    "include/grpc++/impl/method_handler_impl.h",
     "include/grpc++/impl/proto_utils.h",
     "include/grpc++/impl/rpc_method.h",
     "include/grpc++/impl/rpc_service_method.h",
@@ -825,6 +847,36 @@ cc_library(
     "include/grpc++/support/stub_options.h",
     "include/grpc++/support/sync_stream.h",
     "include/grpc++/support/time.h",
+    "include/grpc++/impl/codegen/async_stream.h",
+    "include/grpc++/impl/codegen/async_unary_call.h",
+    "include/grpc++/impl/codegen/call.h",
+    "include/grpc++/impl/codegen/call_hook.h",
+    "include/grpc++/impl/codegen/channel_interface.h",
+    "include/grpc++/impl/codegen/client_context.h",
+    "include/grpc++/impl/codegen/client_unary_call.h",
+    "include/grpc++/impl/codegen/completion_queue.h",
+    "include/grpc++/impl/codegen/completion_queue_tag.h",
+    "include/grpc++/impl/codegen/config.h",
+    "include/grpc++/impl/codegen/config_protobuf.h",
+    "include/grpc++/impl/codegen/grpc_library.h",
+    "include/grpc++/impl/codegen/method_handler_impl.h",
+    "include/grpc++/impl/codegen/proto_utils.h",
+    "include/grpc++/impl/codegen/rpc_method.h",
+    "include/grpc++/impl/codegen/rpc_service_method.h",
+    "include/grpc++/impl/codegen/security/auth_context.h",
+    "include/grpc++/impl/codegen/serialization_traits.h",
+    "include/grpc++/impl/codegen/server_context.h",
+    "include/grpc++/impl/codegen/server_interface.h",
+    "include/grpc++/impl/codegen/service_type.h",
+    "include/grpc++/impl/codegen/status.h",
+    "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/string_ref.h",
+    "include/grpc++/impl/codegen/stub_options.h",
+    "include/grpc++/impl/codegen/sync.h",
+    "include/grpc++/impl/codegen/sync_cxx11.h",
+    "include/grpc++/impl/codegen/sync_no_cxx11.h",
+    "include/grpc++/impl/codegen/sync_stream.h",
+    "include/grpc++/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -874,6 +926,7 @@ cc_library(
     "src/cpp/util/status.cc",
     "src/cpp/util/string_ref.cc",
     "src/cpp/util/time.cc",
+    "src/cpp/codegen/grpc_library.cc",
   ],
   hdrs = [
     "include/grpc++/channel.h",
@@ -886,6 +939,7 @@ cc_library(
     "include/grpc++/impl/call.h",
     "include/grpc++/impl/client_unary_call.h",
     "include/grpc++/impl/grpc_library.h",
+    "include/grpc++/impl/method_handler_impl.h",
     "include/grpc++/impl/proto_utils.h",
     "include/grpc++/impl/rpc_method.h",
     "include/grpc++/impl/rpc_service_method.h",
@@ -918,6 +972,36 @@ cc_library(
     "include/grpc++/support/stub_options.h",
     "include/grpc++/support/sync_stream.h",
     "include/grpc++/support/time.h",
+    "include/grpc++/impl/codegen/async_stream.h",
+    "include/grpc++/impl/codegen/async_unary_call.h",
+    "include/grpc++/impl/codegen/call.h",
+    "include/grpc++/impl/codegen/call_hook.h",
+    "include/grpc++/impl/codegen/channel_interface.h",
+    "include/grpc++/impl/codegen/client_context.h",
+    "include/grpc++/impl/codegen/client_unary_call.h",
+    "include/grpc++/impl/codegen/completion_queue.h",
+    "include/grpc++/impl/codegen/completion_queue_tag.h",
+    "include/grpc++/impl/codegen/config.h",
+    "include/grpc++/impl/codegen/config_protobuf.h",
+    "include/grpc++/impl/codegen/grpc_library.h",
+    "include/grpc++/impl/codegen/method_handler_impl.h",
+    "include/grpc++/impl/codegen/proto_utils.h",
+    "include/grpc++/impl/codegen/rpc_method.h",
+    "include/grpc++/impl/codegen/rpc_service_method.h",
+    "include/grpc++/impl/codegen/security/auth_context.h",
+    "include/grpc++/impl/codegen/serialization_traits.h",
+    "include/grpc++/impl/codegen/server_context.h",
+    "include/grpc++/impl/codegen/server_interface.h",
+    "include/grpc++/impl/codegen/service_type.h",
+    "include/grpc++/impl/codegen/status.h",
+    "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/string_ref.h",
+    "include/grpc++/impl/codegen/stub_options.h",
+    "include/grpc++/impl/codegen/sync.h",
+    "include/grpc++/impl/codegen/sync_cxx11.h",
+    "include/grpc++/impl/codegen/sync_no_cxx11.h",
+    "include/grpc++/impl/codegen/sync_stream.h",
+    "include/grpc++/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -954,8 +1038,59 @@ cc_library(
     "src/compiler/objective_c_generator.cc",
     "src/compiler/python_generator.cc",
     "src/compiler/ruby_generator.cc",
+    "src/cpp/codegen/grpc_library.cc",
   ],
   hdrs = [
+    "include/grpc++/impl/codegen/async_stream.h",
+    "include/grpc++/impl/codegen/async_unary_call.h",
+    "include/grpc++/impl/codegen/call.h",
+    "include/grpc++/impl/codegen/call_hook.h",
+    "include/grpc++/impl/codegen/channel_interface.h",
+    "include/grpc++/impl/codegen/client_context.h",
+    "include/grpc++/impl/codegen/client_unary_call.h",
+    "include/grpc++/impl/codegen/completion_queue.h",
+    "include/grpc++/impl/codegen/completion_queue_tag.h",
+    "include/grpc++/impl/codegen/config.h",
+    "include/grpc++/impl/codegen/config_protobuf.h",
+    "include/grpc++/impl/codegen/grpc_library.h",
+    "include/grpc++/impl/codegen/method_handler_impl.h",
+    "include/grpc++/impl/codegen/proto_utils.h",
+    "include/grpc++/impl/codegen/rpc_method.h",
+    "include/grpc++/impl/codegen/rpc_service_method.h",
+    "include/grpc++/impl/codegen/security/auth_context.h",
+    "include/grpc++/impl/codegen/serialization_traits.h",
+    "include/grpc++/impl/codegen/server_context.h",
+    "include/grpc++/impl/codegen/server_interface.h",
+    "include/grpc++/impl/codegen/service_type.h",
+    "include/grpc++/impl/codegen/status.h",
+    "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/string_ref.h",
+    "include/grpc++/impl/codegen/stub_options.h",
+    "include/grpc++/impl/codegen/sync.h",
+    "include/grpc++/impl/codegen/sync_cxx11.h",
+    "include/grpc++/impl/codegen/sync_no_cxx11.h",
+    "include/grpc++/impl/codegen/sync_stream.h",
+    "include/grpc++/impl/codegen/time.h",
+    "include/grpc/impl/codegen/alloc.h",
+    "include/grpc/impl/codegen/atm.h",
+    "include/grpc/impl/codegen/atm_gcc_atomic.h",
+    "include/grpc/impl/codegen/atm_gcc_sync.h",
+    "include/grpc/impl/codegen/atm_win32.h",
+    "include/grpc/impl/codegen/byte_buffer.h",
+    "include/grpc/impl/codegen/compression_types.h",
+    "include/grpc/impl/codegen/connectivity_state.h",
+    "include/grpc/impl/codegen/grpc_types.h",
+    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/port_platform.h",
+    "include/grpc/impl/codegen/propagation_bits.h",
+    "include/grpc/impl/codegen/slice.h",
+    "include/grpc/impl/codegen/slice_buffer.h",
+    "include/grpc/impl/codegen/status.h",
+    "include/grpc/impl/codegen/sync.h",
+    "include/grpc/impl/codegen/sync_generic.h",
+    "include/grpc/impl/codegen/sync_posix.h",
+    "include/grpc/impl/codegen/sync_win32.h",
+    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -1060,6 +1195,26 @@ objc_library(
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
+    "include/grpc/impl/codegen/alloc.h",
+    "include/grpc/impl/codegen/atm.h",
+    "include/grpc/impl/codegen/atm_gcc_atomic.h",
+    "include/grpc/impl/codegen/atm_gcc_sync.h",
+    "include/grpc/impl/codegen/atm_win32.h",
+    "include/grpc/impl/codegen/byte_buffer.h",
+    "include/grpc/impl/codegen/compression_types.h",
+    "include/grpc/impl/codegen/connectivity_state.h",
+    "include/grpc/impl/codegen/grpc_types.h",
+    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/port_platform.h",
+    "include/grpc/impl/codegen/propagation_bits.h",
+    "include/grpc/impl/codegen/slice.h",
+    "include/grpc/impl/codegen/slice_buffer.h",
+    "include/grpc/impl/codegen/status.h",
+    "include/grpc/impl/codegen/sync.h",
+    "include/grpc/impl/codegen/sync_generic.h",
+    "include/grpc/impl/codegen/sync_posix.h",
+    "include/grpc/impl/codegen/sync_win32.h",
+    "include/grpc/impl/codegen/time.h",
     "src/core/profiling/timers.h",
     "src/core/support/block_annotate.h",
     "src/core/support/env.h",
diff --git a/Makefile b/Makefile
index f7539216dad2303da7adb4f146ec77d2e5b5d5e8..31559d5c65226e51c297602031183e79faeed31f 100644
--- a/Makefile
+++ b/Makefile
@@ -122,8 +122,7 @@ CC_asan-noleaks = clang
 CXX_asan-noleaks = clang++
 LD_asan-noleaks = clang
 LDXX_asan-noleaks = clang++
-CFLAGS_asan-noleaks = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
-CXXFLAGS_asan-noleaks = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
+CPPFLAGS_asan-noleaks = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
 LDFLAGS_asan-noleaks = -fsanitize=address
 DEFINES_asan-noleaks += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
 
@@ -133,8 +132,7 @@ CC_ubsan = clang
 CXX_ubsan = clang++
 LD_ubsan = clang
 LDXX_ubsan = clang++
-CFLAGS_ubsan = -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
-CXXFLAGS_ubsan = -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
+CPPFLAGS_ubsan = -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
 LDFLAGS_ubsan = -fsanitize=undefined
 DEFINES_ubsan = NDEBUG
 DEFINES_ubsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
@@ -161,8 +159,7 @@ CC_gcov = gcc
 CXX_gcov = g++
 LD_gcov = gcc
 LDXX_gcov = g++
-CFLAGS_gcov = -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
-CXXFLAGS_gcov = -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
+CPPFLAGS_gcov = -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
 LDFLAGS_gcov = -fprofile-arcs -ftest-coverage -rdynamic
 DEFINES_gcov = _DEBUG DEBUG GPR_GCOV
 
@@ -182,8 +179,7 @@ CC_asan = clang
 CXX_asan = clang++
 LD_asan = clang
 LDXX_asan = clang++
-CFLAGS_asan = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
-CXXFLAGS_asan = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
+CPPFLAGS_asan = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
 LDFLAGS_asan = -fsanitize=address
 DEFINES_asan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
 
@@ -193,8 +189,7 @@ CC_tsan = clang
 CXX_tsan = clang++
 LD_tsan = clang
 LDXX_tsan = clang++
-CFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie
-CXXFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie
+CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie
 LDFLAGS_tsan = -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
 DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=2
 
@@ -204,11 +199,10 @@ CC_msan = clang
 CXX_msan = clang++
 LD_msan = clang
 LDXX_msan = clang++
-CFLAGS_msan = -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie
-CXXFLAGS_msan = -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie
+CPPFLAGS_msan = -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie
 LDFLAGS_msan = -fsanitize=memory -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
 DEFINES_msan = NDEBUG
-DEFINES_msan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
+DEFINES_msan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=2
 
 VALID_CONFIG_mutrace = 1
 CC_mutrace = $(DEFAULT_CC)
@@ -305,8 +299,7 @@ CXXFLAGS += -std=c++11
 else
 CXXFLAGS += -std=c++0x
 endif
-CFLAGS += -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
-CXXFLAGS += -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
+CPPFLAGS += -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
 LDFLAGS += -g
 
 CPPFLAGS += $(CPPFLAGS_$(CONFIG))
@@ -437,20 +430,20 @@ else
 OPENSSL_LIBS = ssl crypto
 endif
 
-OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
-OPENSSL_NPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
-ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
-PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
+OPENSSL_ALPN_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
+OPENSSL_NPN_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
+ZLIB_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
+PROTOBUF_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
 
 endif # HAS_PKG_CONFIG
 
-PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
+PERFTOOLS_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 
 PROTOC_CHECK_CMD = which protoc > /dev/null
 PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
 DTRACE_CHECK_CMD = which dtrace > /dev/null
-SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
-ZOOKEEPER_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zookeeper.c $(LDFLAGS) -lzookeeper_mt
+SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
+ZOOKEEPER_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zookeeper.c $(LDFLAGS) -lzookeeper_mt
 
 ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
 HAS_SYSTEM_PERFTOOLS ?= $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true || echo false)
@@ -949,6 +942,7 @@ grpc_csharp_plugin: $(BINDIR)/$(CONFIG)/grpc_csharp_plugin
 grpc_objective_c_plugin: $(BINDIR)/$(CONFIG)/grpc_objective_c_plugin
 grpc_python_plugin: $(BINDIR)/$(CONFIG)/grpc_python_plugin
 grpc_ruby_plugin: $(BINDIR)/$(CONFIG)/grpc_ruby_plugin
+hybrid_end2end_test: $(BINDIR)/$(CONFIG)/hybrid_end2end_test
 interop_client: $(BINDIR)/$(CONFIG)/interop_client
 interop_server: $(BINDIR)/$(CONFIG)/interop_server
 interop_test: $(BINDIR)/$(CONFIG)/interop_test
@@ -1291,6 +1285,7 @@ buildtests_cxx: buildtests_zookeeper privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test \
   $(BINDIR)/$(CONFIG)/generic_end2end_test \
   $(BINDIR)/$(CONFIG)/grpc_cli \
+  $(BINDIR)/$(CONFIG)/hybrid_end2end_test \
   $(BINDIR)/$(CONFIG)/interop_client \
   $(BINDIR)/$(CONFIG)/interop_server \
   $(BINDIR)/$(CONFIG)/interop_test \
@@ -1594,6 +1589,8 @@ test_cxx: test_zookeeper buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test || ( echo test generic_async_streaming_ping_pong_test failed ; exit 1 )
 	$(E) "[RUN]     Testing generic_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/generic_end2end_test || ( echo test generic_end2end_test failed ; exit 1 )
+	$(E) "[RUN]     Testing hybrid_end2end_test"
+	$(Q) $(BINDIR)/$(CONFIG)/hybrid_end2end_test || ( echo test hybrid_end2end_test failed ; exit 1 )
 	$(E) "[RUN]     Testing interop_test"
 	$(Q) $(BINDIR)/$(CONFIG)/interop_test || ( echo test interop_test failed ; exit 1 )
 	$(E) "[RUN]     Testing mock_test"
@@ -1942,12 +1939,12 @@ endif
 $(OBJDIR)/$(CONFIG)/%.o : %.c
 	$(E) "[C]       Compiling $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(CC) $(CFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+	$(Q) $(CC) $(CPPFLAGS) $(CFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
 $(OBJDIR)/$(CONFIG)/%.o : $(GENDIR)/%.pb.cc
 	$(E) "[CXX]     Compiling $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+	$(Q) $(CXX) $(CPPFLAGS) $(CXXFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
 $(OBJDIR)/$(CONFIG)/src/compiler/%.o : src/compiler/%.cc
 	$(E) "[HOSTCXX] Compiling $<"
@@ -1957,7 +1954,7 @@ $(OBJDIR)/$(CONFIG)/src/compiler/%.o : src/compiler/%.cc
 $(OBJDIR)/$(CONFIG)/%.o : %.cc
 	$(E) "[CXX]     Compiling $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+	$(Q) $(CXX) $(CPPFLAGS) $(CXXFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
 install: install_c install_cxx install-plugins install-certs verify-install
 
@@ -2275,11 +2272,31 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/tls_msvc.h \
     include/grpc/support/tls_pthread.h \
     include/grpc/support/useful.h \
+    include/grpc/impl/codegen/alloc.h \
+    include/grpc/impl/codegen/atm.h \
+    include/grpc/impl/codegen/atm_gcc_atomic.h \
+    include/grpc/impl/codegen/atm_gcc_sync.h \
+    include/grpc/impl/codegen/atm_win32.h \
+    include/grpc/impl/codegen/byte_buffer.h \
+    include/grpc/impl/codegen/compression_types.h \
+    include/grpc/impl/codegen/connectivity_state.h \
+    include/grpc/impl/codegen/grpc_types.h \
+    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/port_platform.h \
+    include/grpc/impl/codegen/propagation_bits.h \
+    include/grpc/impl/codegen/slice.h \
+    include/grpc/impl/codegen/slice_buffer.h \
+    include/grpc/impl/codegen/status.h \
+    include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_generic.h \
+    include/grpc/impl/codegen/sync_posix.h \
+    include/grpc/impl/codegen/sync_win32.h \
+    include/grpc/impl/codegen/time.h \
 
 LIBGPR_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgpr.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBGPR_OBJS)
+$(LIBDIR)/$(CONFIG)/libgpr.a: $(ZLIB_DEP)  $(LIBGPR_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr.a
@@ -2320,7 +2337,7 @@ LIBGPR_TEST_UTIL_SRC = \
 LIBGPR_TEST_UTIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_TEST_UTIL_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgpr_test_util.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBGPR_TEST_UTIL_OBJS)
+$(LIBDIR)/$(CONFIG)/libgpr_test_util.a: $(ZLIB_DEP)  $(LIBGPR_TEST_UTIL_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr_test_util.a
@@ -2644,7 +2661,7 @@ PUBLIC_HEADERS_C += \
 LIBGRPC_TEST_UTIL_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_TEST_UTIL_UNSECURE_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBGRPC_TEST_UTIL_UNSECURE_OBJS)
+$(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_TEST_UTIL_UNSECURE_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a
@@ -2806,7 +2823,7 @@ PUBLIC_HEADERS_C += \
 LIBGRPC_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_UNSECURE_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBGRPC_UNSECURE_OBJS)
+$(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_UNSECURE_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
@@ -2864,7 +2881,7 @@ PUBLIC_HEADERS_C += \
 LIBGRPC_ZOOKEEPER_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_ZOOKEEPER_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBGRPC_ZOOKEEPER_OBJS)
+$(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a: $(ZLIB_DEP)  $(LIBGRPC_ZOOKEEPER_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a
@@ -3007,6 +3024,7 @@ LIBGRPC++_SRC = \
     src/cpp/util/status.cc \
     src/cpp/util/string_ref.cc \
     src/cpp/util/time.cc \
+    src/cpp/codegen/grpc_library.cc \
 
 PUBLIC_HEADERS_CXX += \
     include/grpc++/channel.h \
@@ -3019,6 +3037,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/call.h \
     include/grpc++/impl/client_unary_call.h \
     include/grpc++/impl/grpc_library.h \
+    include/grpc++/impl/method_handler_impl.h \
     include/grpc++/impl/proto_utils.h \
     include/grpc++/impl/rpc_method.h \
     include/grpc++/impl/rpc_service_method.h \
@@ -3051,6 +3070,36 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/support/stub_options.h \
     include/grpc++/support/sync_stream.h \
     include/grpc++/support/time.h \
+    include/grpc++/impl/codegen/async_stream.h \
+    include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/call.h \
+    include/grpc++/impl/codegen/call_hook.h \
+    include/grpc++/impl/codegen/channel_interface.h \
+    include/grpc++/impl/codegen/client_context.h \
+    include/grpc++/impl/codegen/client_unary_call.h \
+    include/grpc++/impl/codegen/completion_queue.h \
+    include/grpc++/impl/codegen/completion_queue_tag.h \
+    include/grpc++/impl/codegen/config.h \
+    include/grpc++/impl/codegen/config_protobuf.h \
+    include/grpc++/impl/codegen/grpc_library.h \
+    include/grpc++/impl/codegen/method_handler_impl.h \
+    include/grpc++/impl/codegen/proto_utils.h \
+    include/grpc++/impl/codegen/rpc_method.h \
+    include/grpc++/impl/codegen/rpc_service_method.h \
+    include/grpc++/impl/codegen/security/auth_context.h \
+    include/grpc++/impl/codegen/serialization_traits.h \
+    include/grpc++/impl/codegen/server_context.h \
+    include/grpc++/impl/codegen/server_interface.h \
+    include/grpc++/impl/codegen/service_type.h \
+    include/grpc++/impl/codegen/status.h \
+    include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/string_ref.h \
+    include/grpc++/impl/codegen/stub_options.h \
+    include/grpc++/impl/codegen/sync.h \
+    include/grpc++/impl/codegen/sync_cxx11.h \
+    include/grpc++/impl/codegen/sync_no_cxx11.h \
+    include/grpc++/impl/codegen/sync_stream.h \
+    include/grpc++/impl/codegen/time.h \
 
 LIBGRPC++_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_SRC))))
 
@@ -3190,6 +3239,8 @@ LIBGRPC++_TEST_UTIL_SRC = \
     $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc \
     $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc \
     $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc \
+    test/cpp/end2end/test_service_impl.cc \
+    test/cpp/util/byte_buffer_proto_helper.cc \
     test/cpp/util/cli_call.cc \
     test/cpp/util/create_test_channel.cc \
     test/cpp/util/string_ref_helper.cc \
@@ -3238,6 +3289,8 @@ ifneq ($(NO_DEPS),true)
 -include $(LIBGRPC++_TEST_UTIL_OBJS:.o=.dep)
 endif
 endif
+$(OBJDIR)/$(CONFIG)/test/cpp/end2end/test_service_impl.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/util/byte_buffer_proto_helper.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/util/cli_call.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/util/create_test_channel.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/util/string_ref_helper.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
@@ -3272,6 +3325,7 @@ LIBGRPC++_UNSECURE_SRC = \
     src/cpp/util/status.cc \
     src/cpp/util/string_ref.cc \
     src/cpp/util/time.cc \
+    src/cpp/codegen/grpc_library.cc \
 
 PUBLIC_HEADERS_CXX += \
     include/grpc++/channel.h \
@@ -3284,6 +3338,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/call.h \
     include/grpc++/impl/client_unary_call.h \
     include/grpc++/impl/grpc_library.h \
+    include/grpc++/impl/method_handler_impl.h \
     include/grpc++/impl/proto_utils.h \
     include/grpc++/impl/rpc_method.h \
     include/grpc++/impl/rpc_service_method.h \
@@ -3316,6 +3371,36 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/support/stub_options.h \
     include/grpc++/support/sync_stream.h \
     include/grpc++/support/time.h \
+    include/grpc++/impl/codegen/async_stream.h \
+    include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/call.h \
+    include/grpc++/impl/codegen/call_hook.h \
+    include/grpc++/impl/codegen/channel_interface.h \
+    include/grpc++/impl/codegen/client_context.h \
+    include/grpc++/impl/codegen/client_unary_call.h \
+    include/grpc++/impl/codegen/completion_queue.h \
+    include/grpc++/impl/codegen/completion_queue_tag.h \
+    include/grpc++/impl/codegen/config.h \
+    include/grpc++/impl/codegen/config_protobuf.h \
+    include/grpc++/impl/codegen/grpc_library.h \
+    include/grpc++/impl/codegen/method_handler_impl.h \
+    include/grpc++/impl/codegen/proto_utils.h \
+    include/grpc++/impl/codegen/rpc_method.h \
+    include/grpc++/impl/codegen/rpc_service_method.h \
+    include/grpc++/impl/codegen/security/auth_context.h \
+    include/grpc++/impl/codegen/serialization_traits.h \
+    include/grpc++/impl/codegen/server_context.h \
+    include/grpc++/impl/codegen/server_interface.h \
+    include/grpc++/impl/codegen/service_type.h \
+    include/grpc++/impl/codegen/status.h \
+    include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/string_ref.h \
+    include/grpc++/impl/codegen/stub_options.h \
+    include/grpc++/impl/codegen/sync.h \
+    include/grpc++/impl/codegen/sync_cxx11.h \
+    include/grpc++/impl/codegen/sync_no_cxx11.h \
+    include/grpc++/impl/codegen/sync_stream.h \
+    include/grpc++/impl/codegen/time.h \
 
 LIBGRPC++_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_UNSECURE_SRC))))
 
@@ -3334,7 +3419,7 @@ endif
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBGRPC++_UNSECURE_OBJS)
+$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBGRPC++_UNSECURE_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
@@ -3391,7 +3476,59 @@ LIBGRPC_PLUGIN_SUPPORT_SRC = \
     src/compiler/objective_c_generator.cc \
     src/compiler/python_generator.cc \
     src/compiler/ruby_generator.cc \
+    src/cpp/codegen/grpc_library.cc \
 
+PUBLIC_HEADERS_CXX += \
+    include/grpc++/impl/codegen/async_stream.h \
+    include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/call.h \
+    include/grpc++/impl/codegen/call_hook.h \
+    include/grpc++/impl/codegen/channel_interface.h \
+    include/grpc++/impl/codegen/client_context.h \
+    include/grpc++/impl/codegen/client_unary_call.h \
+    include/grpc++/impl/codegen/completion_queue.h \
+    include/grpc++/impl/codegen/completion_queue_tag.h \
+    include/grpc++/impl/codegen/config.h \
+    include/grpc++/impl/codegen/config_protobuf.h \
+    include/grpc++/impl/codegen/grpc_library.h \
+    include/grpc++/impl/codegen/method_handler_impl.h \
+    include/grpc++/impl/codegen/proto_utils.h \
+    include/grpc++/impl/codegen/rpc_method.h \
+    include/grpc++/impl/codegen/rpc_service_method.h \
+    include/grpc++/impl/codegen/security/auth_context.h \
+    include/grpc++/impl/codegen/serialization_traits.h \
+    include/grpc++/impl/codegen/server_context.h \
+    include/grpc++/impl/codegen/server_interface.h \
+    include/grpc++/impl/codegen/service_type.h \
+    include/grpc++/impl/codegen/status.h \
+    include/grpc++/impl/codegen/status_code_enum.h \
+    include/grpc++/impl/codegen/string_ref.h \
+    include/grpc++/impl/codegen/stub_options.h \
+    include/grpc++/impl/codegen/sync.h \
+    include/grpc++/impl/codegen/sync_cxx11.h \
+    include/grpc++/impl/codegen/sync_no_cxx11.h \
+    include/grpc++/impl/codegen/sync_stream.h \
+    include/grpc++/impl/codegen/time.h \
+    include/grpc/impl/codegen/alloc.h \
+    include/grpc/impl/codegen/atm.h \
+    include/grpc/impl/codegen/atm_gcc_atomic.h \
+    include/grpc/impl/codegen/atm_gcc_sync.h \
+    include/grpc/impl/codegen/atm_win32.h \
+    include/grpc/impl/codegen/byte_buffer.h \
+    include/grpc/impl/codegen/compression_types.h \
+    include/grpc/impl/codegen/connectivity_state.h \
+    include/grpc/impl/codegen/grpc_types.h \
+    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/port_platform.h \
+    include/grpc/impl/codegen/propagation_bits.h \
+    include/grpc/impl/codegen/slice.h \
+    include/grpc/impl/codegen/slice_buffer.h \
+    include/grpc/impl/codegen/status.h \
+    include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_generic.h \
+    include/grpc/impl/codegen/sync_posix.h \
+    include/grpc/impl/codegen/sync_win32.h \
+    include/grpc/impl/codegen/time.h \
 
 LIBGRPC_PLUGIN_SUPPORT_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_PLUGIN_SUPPORT_SRC))))
 
@@ -3405,7 +3542,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBGRPC_PLUGIN_SUPPORT_OBJS)
+$(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBGRPC_PLUGIN_SUPPORT_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a
@@ -4060,14 +4197,10 @@ LIBBORINGSSL_SRC = \
 
 LIBBORINGSSL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl.a: $(ZLIB_DEP)  $(LIBBORINGSSL_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl.a
@@ -4092,12 +4225,8 @@ LIBBORINGSSL_TEST_UTIL_SRC = \
 
 LIBBORINGSSL_TEST_UTIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_TEST_UTIL_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_TEST_UTIL_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_TEST_UTIL_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_TEST_UTIL_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_TEST_UTIL_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_TEST_UTIL_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4108,7 +4237,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_TEST_UTIL_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_TEST_UTIL_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a
@@ -4133,12 +4262,8 @@ LIBBORINGSSL_AES_TEST_LIB_SRC = \
 
 LIBBORINGSSL_AES_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_AES_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_AES_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_AES_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_AES_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_AES_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_AES_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4149,7 +4274,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AES_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AES_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a
@@ -4174,12 +4299,8 @@ LIBBORINGSSL_BASE64_TEST_LIB_SRC = \
 
 LIBBORINGSSL_BASE64_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_BASE64_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_BASE64_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_BASE64_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_BASE64_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BASE64_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BASE64_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4190,7 +4311,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BASE64_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BASE64_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a
@@ -4215,12 +4336,8 @@ LIBBORINGSSL_BIO_TEST_LIB_SRC = \
 
 LIBBORINGSSL_BIO_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_BIO_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_BIO_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_BIO_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_BIO_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BIO_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BIO_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4231,7 +4348,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BIO_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BIO_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a
@@ -4256,12 +4373,8 @@ LIBBORINGSSL_BN_TEST_LIB_SRC = \
 
 LIBBORINGSSL_BN_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_BN_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_BN_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_BN_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_BN_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BN_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BN_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4272,7 +4385,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BN_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BN_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a
@@ -4297,12 +4410,8 @@ LIBBORINGSSL_BYTESTRING_TEST_LIB_SRC = \
 
 LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_BYTESTRING_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4313,7 +4422,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a
@@ -4338,12 +4447,8 @@ LIBBORINGSSL_AEAD_TEST_LIB_SRC = \
 
 LIBBORINGSSL_AEAD_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_AEAD_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_AEAD_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_AEAD_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_AEAD_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_AEAD_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_AEAD_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4354,7 +4459,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AEAD_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AEAD_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a
@@ -4379,12 +4484,8 @@ LIBBORINGSSL_CIPHER_TEST_LIB_SRC = \
 
 LIBBORINGSSL_CIPHER_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_CIPHER_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4395,7 +4496,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a
@@ -4420,12 +4521,8 @@ LIBBORINGSSL_CMAC_TEST_LIB_SRC = \
 
 LIBBORINGSSL_CMAC_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_CMAC_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_CMAC_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_CMAC_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_CMAC_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CMAC_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CMAC_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4436,7 +4533,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CMAC_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CMAC_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a
@@ -4461,14 +4558,10 @@ LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_SRC = \
 
 LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a
@@ -4491,12 +4584,8 @@ LIBBORINGSSL_ED25519_TEST_LIB_SRC = \
 
 LIBBORINGSSL_ED25519_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_ED25519_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_ED25519_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_ED25519_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_ED25519_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ED25519_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ED25519_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4507,7 +4596,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ED25519_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ED25519_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a
@@ -4532,12 +4621,8 @@ LIBBORINGSSL_X25519_TEST_LIB_SRC = \
 
 LIBBORINGSSL_X25519_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_X25519_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_X25519_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_X25519_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_X25519_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_X25519_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_X25519_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4548,7 +4633,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X25519_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X25519_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a
@@ -4573,12 +4658,8 @@ LIBBORINGSSL_DH_TEST_LIB_SRC = \
 
 LIBBORINGSSL_DH_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_DH_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_DH_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_DH_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_DH_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DH_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DH_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4589,7 +4670,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DH_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DH_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a
@@ -4614,12 +4695,8 @@ LIBBORINGSSL_DIGEST_TEST_LIB_SRC = \
 
 LIBBORINGSSL_DIGEST_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_DIGEST_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4630,7 +4707,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a
@@ -4655,14 +4732,10 @@ LIBBORINGSSL_DSA_TEST_LIB_SRC = \
 
 LIBBORINGSSL_DSA_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_DSA_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_DSA_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_DSA_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a
@@ -4685,12 +4758,8 @@ LIBBORINGSSL_EC_TEST_LIB_SRC = \
 
 LIBBORINGSSL_EC_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_EC_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_EC_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_EC_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_EC_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EC_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EC_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4701,7 +4770,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EC_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EC_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a
@@ -4726,14 +4795,10 @@ LIBBORINGSSL_EXAMPLE_MUL_LIB_SRC = \
 
 LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_EXAMPLE_MUL_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a
@@ -4756,12 +4821,8 @@ LIBBORINGSSL_ECDSA_TEST_LIB_SRC = \
 
 LIBBORINGSSL_ECDSA_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_ECDSA_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4772,7 +4833,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a
@@ -4797,12 +4858,8 @@ LIBBORINGSSL_ERR_TEST_LIB_SRC = \
 
 LIBBORINGSSL_ERR_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_ERR_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_ERR_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_ERR_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_ERR_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ERR_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_ERR_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4813,7 +4870,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ERR_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ERR_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a
@@ -4838,12 +4895,8 @@ LIBBORINGSSL_EVP_EXTRA_TEST_LIB_SRC = \
 
 LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4854,7 +4907,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a
@@ -4879,12 +4932,8 @@ LIBBORINGSSL_EVP_TEST_LIB_SRC = \
 
 LIBBORINGSSL_EVP_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_EVP_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_EVP_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_EVP_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_EVP_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EVP_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_EVP_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4895,7 +4944,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a
@@ -4920,12 +4969,8 @@ LIBBORINGSSL_PBKDF_TEST_LIB_SRC = \
 
 LIBBORINGSSL_PBKDF_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_PBKDF_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -4936,7 +4981,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a
@@ -4961,14 +5006,10 @@ LIBBORINGSSL_HKDF_TEST_LIB_SRC = \
 
 LIBBORINGSSL_HKDF_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_HKDF_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a
@@ -4991,12 +5032,8 @@ LIBBORINGSSL_HMAC_TEST_LIB_SRC = \
 
 LIBBORINGSSL_HMAC_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_HMAC_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_HMAC_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_HMAC_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_HMAC_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_HMAC_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_HMAC_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5007,7 +5044,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_HMAC_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_HMAC_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a
@@ -5032,14 +5069,10 @@ LIBBORINGSSL_LHASH_TEST_LIB_SRC = \
 
 LIBBORINGSSL_LHASH_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_LHASH_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a
@@ -5062,14 +5095,10 @@ LIBBORINGSSL_GCM_TEST_LIB_SRC = \
 
 LIBBORINGSSL_GCM_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_GCM_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_GCM_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_GCM_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_GCM_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_GCM_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_GCM_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_GCM_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_GCM_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a
@@ -5092,12 +5121,8 @@ LIBBORINGSSL_PKCS12_TEST_LIB_SRC = \
 
 LIBBORINGSSL_PKCS12_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_PKCS12_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5108,7 +5133,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a
@@ -5133,12 +5158,8 @@ LIBBORINGSSL_PKCS8_TEST_LIB_SRC = \
 
 LIBBORINGSSL_PKCS8_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_PKCS8_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5149,7 +5170,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a
@@ -5174,12 +5195,8 @@ LIBBORINGSSL_POLY1305_TEST_LIB_SRC = \
 
 LIBBORINGSSL_POLY1305_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_POLY1305_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5190,7 +5207,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a
@@ -5215,14 +5232,10 @@ LIBBORINGSSL_REFCOUNT_TEST_LIB_SRC = \
 
 LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_REFCOUNT_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a
@@ -5245,12 +5258,8 @@ LIBBORINGSSL_RSA_TEST_LIB_SRC = \
 
 LIBBORINGSSL_RSA_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_RSA_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_RSA_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_RSA_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_RSA_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_RSA_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_RSA_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5261,7 +5270,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_RSA_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_RSA_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a
@@ -5286,14 +5295,10 @@ LIBBORINGSSL_THREAD_TEST_LIB_SRC = \
 
 LIBBORINGSSL_THREAD_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_THREAD_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a
@@ -5316,14 +5321,10 @@ LIBBORINGSSL_PKCS7_TEST_LIB_SRC = \
 
 LIBBORINGSSL_PKCS7_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_PKCS7_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a
@@ -5346,14 +5347,10 @@ LIBBORINGSSL_TAB_TEST_LIB_SRC = \
 
 LIBBORINGSSL_TAB_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_TAB_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_TAB_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_TAB_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a
@@ -5376,14 +5373,10 @@ LIBBORINGSSL_V3NAME_TEST_LIB_SRC = \
 
 LIBBORINGSSL_V3NAME_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_V3NAME_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a
@@ -5406,14 +5399,10 @@ LIBBORINGSSL_PQUEUE_TEST_LIB_SRC = \
 
 LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_PQUEUE_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a
@@ -5436,12 +5425,8 @@ LIBBORINGSSL_SSL_TEST_LIB_SRC = \
 
 LIBBORINGSSL_SSL_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_SSL_TEST_LIB_SRC))))
 
-# boringssl needs an override to ensure that it does not include
-# system openssl headers regardless of other configuration
-# we do so here with a target specific variable assignment
-$(LIBBORINGSSL_SSL_TEST_LIB_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-$(LIBBORINGSSL_SSL_TEST_LIB_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-$(LIBBORINGSSL_SSL_TEST_LIB_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_SSL_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE
+$(LIBBORINGSSL_SSL_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value
 
 ifeq ($(NO_PROTOBUF),true)
 
@@ -5452,7 +5437,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: protobuf_dep_error
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SSL_TEST_LIB_OBJS)
+$(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SSL_TEST_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
@@ -5491,9 +5476,9 @@ LIBZ_SRC = \
 
 LIBZ_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBZ_SRC))))
 
-$(LIBZ_OBJS): CFLAGS := $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
+$(LIBZ_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
 
-$(LIBDIR)/$(CONFIG)/libz.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBZ_OBJS)
+$(LIBDIR)/$(CONFIG)/libz.a:  $(LIBZ_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libz.a
@@ -5702,7 +5687,7 @@ LIBEND2END_NOSEC_TESTS_SRC = \
 LIBEND2END_NOSEC_TESTS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBEND2END_NOSEC_TESTS_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a: $(ZLIB_DEP) $(OPENSSL_DEP)  $(LIBEND2END_NOSEC_TESTS_OBJS)
+$(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a: $(ZLIB_DEP)  $(LIBEND2END_NOSEC_TESTS_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
@@ -9721,6 +9706,49 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
+HYBRID_END2END_TEST_SRC = \
+    test/cpp/end2end/hybrid_end2end_test.cc \
+
+HYBRID_END2END_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HYBRID_END2END_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/hybrid_end2end_test: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/hybrid_end2end_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/hybrid_end2end_test: $(PROTOBUF_DEP) $(HYBRID_END2END_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(HYBRID_END2END_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/hybrid_end2end_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/end2end/hybrid_end2end_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_hybrid_end2end_test: $(HYBRID_END2END_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(HYBRID_END2END_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL.
@@ -10807,7 +10835,7 @@ $(OBJDIR)/$(CONFIG)/test/core/surface/public_headers_must_be_c89.o:  $(LIBDIR)/$
 $(OBJDIR)/$(CONFIG)/test/core/surface/public_headers_must_be_c89.o : test/core/surface/public_headers_must_be_c89.c
 	$(E) "[C]       Compiling $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(CC) $(CFLAGS) $(CPPFLAGS) -std=c89 -pedantic -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+	$(Q) $(CC) $(CPPFLAGS) $(CFLAGS) -std=c89 -pedantic -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
 deps_public_headers_must_be_c89: $(PUBLIC_HEADERS_MUST_BE_C89_OBJS:.o=.dep)
 
@@ -12960,6 +12988,7 @@ test/core/end2end/tests/call_creds.c: $(OPENSSL_DEP)
 test/core/security/oauth2_utils.c: $(OPENSSL_DEP)
 test/core/util/reconnect_server.c: $(OPENSSL_DEP)
 test/core/util/test_tcp_server.c: $(OPENSSL_DEP)
+test/cpp/end2end/test_service_impl.cc: $(OPENSSL_DEP)
 test/cpp/interop/client.cc: $(OPENSSL_DEP)
 test/cpp/interop/client_helper.cc: $(OPENSSL_DEP)
 test/cpp/interop/interop_client.cc: $(OPENSSL_DEP)
@@ -12975,6 +13004,7 @@ test/cpp/qps/server_async.cc: $(OPENSSL_DEP)
 test/cpp/qps/server_sync.cc: $(OPENSSL_DEP)
 test/cpp/qps/timer.cc: $(OPENSSL_DEP)
 test/cpp/util/benchmark_config.cc: $(OPENSSL_DEP)
+test/cpp/util/byte_buffer_proto_helper.cc: $(OPENSSL_DEP)
 test/cpp/util/cli_call.cc: $(OPENSSL_DEP)
 test/cpp/util/create_test_channel.cc: $(OPENSSL_DEP)
 test/cpp/util/string_ref_helper.cc: $(OPENSSL_DEP)
diff --git a/build.yaml b/build.yaml
index 6cb861d52e347780bb0cdad4276cc851cd953b61..1b3cb7920281909c00ceb12f58d92a9928fad985 100644
--- a/build.yaml
+++ b/build.yaml
@@ -34,6 +34,7 @@ filegroups:
   - include/grpc++/impl/call.h
   - include/grpc++/impl/client_unary_call.h
   - include/grpc++/impl/grpc_library.h
+  - include/grpc++/impl/method_handler_impl.h
   - include/grpc++/impl/proto_utils.h
   - include/grpc++/impl/rpc_method.h
   - include/grpc++/impl/rpc_service_method.h
@@ -99,6 +100,40 @@ filegroups:
   - src/cpp/util/status.cc
   - src/cpp/util/string_ref.cc
   - src/cpp/util/time.cc
+- name: grpc++_codegen
+  public_headers:
+  - include/grpc++/impl/codegen/async_stream.h
+  - include/grpc++/impl/codegen/async_unary_call.h
+  - include/grpc++/impl/codegen/call.h
+  - include/grpc++/impl/codegen/call_hook.h
+  - include/grpc++/impl/codegen/channel_interface.h
+  - include/grpc++/impl/codegen/client_context.h
+  - include/grpc++/impl/codegen/client_unary_call.h
+  - include/grpc++/impl/codegen/completion_queue.h
+  - include/grpc++/impl/codegen/completion_queue_tag.h
+  - include/grpc++/impl/codegen/config.h
+  - include/grpc++/impl/codegen/config_protobuf.h
+  - include/grpc++/impl/codegen/grpc_library.h
+  - include/grpc++/impl/codegen/method_handler_impl.h
+  - include/grpc++/impl/codegen/proto_utils.h
+  - include/grpc++/impl/codegen/rpc_method.h
+  - include/grpc++/impl/codegen/rpc_service_method.h
+  - include/grpc++/impl/codegen/security/auth_context.h
+  - include/grpc++/impl/codegen/serialization_traits.h
+  - include/grpc++/impl/codegen/server_context.h
+  - include/grpc++/impl/codegen/server_interface.h
+  - include/grpc++/impl/codegen/service_type.h
+  - include/grpc++/impl/codegen/status.h
+  - include/grpc++/impl/codegen/status_code_enum.h
+  - include/grpc++/impl/codegen/string_ref.h
+  - include/grpc++/impl/codegen/stub_options.h
+  - include/grpc++/impl/codegen/sync.h
+  - include/grpc++/impl/codegen/sync_cxx11.h
+  - include/grpc++/impl/codegen/sync_no_cxx11.h
+  - include/grpc++/impl/codegen/sync_stream.h
+  - include/grpc++/impl/codegen/time.h
+  src:
+  - src/cpp/codegen/grpc_library.cc
 - name: grpc_base
   public_headers:
   - include/grpc/byte_buffer.h
@@ -347,6 +382,28 @@ filegroups:
   - src/core/transport/static_metadata.c
   - src/core/transport/transport.c
   - src/core/transport/transport_op_string.c
+- name: grpc_codegen
+  public_headers:
+  - include/grpc/impl/codegen/alloc.h
+  - include/grpc/impl/codegen/atm.h
+  - include/grpc/impl/codegen/atm_gcc_atomic.h
+  - include/grpc/impl/codegen/atm_gcc_sync.h
+  - include/grpc/impl/codegen/atm_win32.h
+  - include/grpc/impl/codegen/byte_buffer.h
+  - include/grpc/impl/codegen/compression_types.h
+  - include/grpc/impl/codegen/connectivity_state.h
+  - include/grpc/impl/codegen/grpc_types.h
+  - include/grpc/impl/codegen/log.h
+  - include/grpc/impl/codegen/port_platform.h
+  - include/grpc/impl/codegen/propagation_bits.h
+  - include/grpc/impl/codegen/slice.h
+  - include/grpc/impl/codegen/slice_buffer.h
+  - include/grpc/impl/codegen/status.h
+  - include/grpc/impl/codegen/sync.h
+  - include/grpc/impl/codegen/sync_generic.h
+  - include/grpc/impl/codegen/sync_posix.h
+  - include/grpc/impl/codegen/sync_win32.h
+  - include/grpc/impl/codegen/time.h
 - name: grpc_test_util_base
   headers:
   - test/core/end2end/cq_verifier.h
@@ -451,6 +508,8 @@ libs:
   - src/core/support/time_precise.c
   - src/core/support/time_win32.c
   - src/core/support/tls_pthread.c
+  filegroups:
+  - grpc_codegen
   secure: false
   vs_project_guid: '{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}'
 - name: gpr_test_util
@@ -624,6 +683,7 @@ libs:
   dll: true
   filegroups:
   - grpc++_base
+  - grpc++_codegen
   secure: check
   vs_project_guid: '{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}'
 - name: grpc++_test_config
@@ -637,6 +697,8 @@ libs:
   build: private
   language: c++
   headers:
+  - test/cpp/end2end/test_service_impl.h
+  - test/cpp/util/byte_buffer_proto_helper.h
   - test/cpp/util/cli_call.h
   - test/cpp/util/create_test_channel.h
   - test/cpp/util/string_ref_helper.h
@@ -645,6 +707,8 @@ libs:
   - src/proto/grpc/testing/echo_messages.proto
   - src/proto/grpc/testing/echo.proto
   - src/proto/grpc/testing/duplicate/echo_duplicate.proto
+  - test/cpp/end2end/test_service_impl.cc
+  - test/cpp/util/byte_buffer_proto_helper.cc
   - test/cpp/util/cli_call.cc
   - test/cpp/util/create_test_channel.cc
   - test/cpp/util/string_ref_helper.cc
@@ -664,6 +728,7 @@ libs:
   dll: true
   filegroups:
   - grpc++_base
+  - grpc++_codegen
   secure: false
   vs_project_guid: '{6EE56155-DF7C-4F6E-BFC4-F6F776BEB211}'
 - name: grpc_plugin_support
@@ -692,6 +757,9 @@ libs:
   - src/compiler/python_generator.cc
   - src/compiler/ruby_generator.cc
   deps: []
+  filegroups:
+  - grpc++_codegen
+  - grpc_codegen
   secure: false
   vs_project_guid: '{B6E81D84-2ACB-41B8-8781-493A944C7817}'
 - name: interop_client_helper
@@ -2071,6 +2139,18 @@ targets:
   secure: false
   vs_config_type: Application
   vs_project_guid: '{069E9D05-B78B-4751-9252-D21EBAE7DE8E}'
+- name: hybrid_end2end_test
+  build: test
+  language: c++
+  src:
+  - test/cpp/end2end/hybrid_end2end_test.cc
+  deps:
+  - grpc++_test_util
+  - grpc_test_util
+  - grpc++
+  - grpc
+  - gpr_test_util
+  - gpr
 - name: interop_client
   build: test
   run: false
@@ -2495,9 +2575,8 @@ vspackages:
 configs:
   asan:
     CC: clang
-    CFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
+    CPPFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
     CXX: clang++
-    CXXFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
     LD: clang
     LDFLAGS: -fsanitize=address
     LDXX: clang++
@@ -2508,9 +2587,8 @@ configs:
     timeout_multiplier: 1.5
   asan-noleaks:
     CC: clang
-    CFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
+    CPPFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
     CXX: clang++
-    CXXFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
     LD: clang
     LDFLAGS: -fsanitize=address
     LDXX: clang++
@@ -2527,9 +2605,8 @@ configs:
     LDFLAGS: -rdynamic
   gcov:
     CC: gcc
-    CFLAGS: -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
+    CPPFLAGS: -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
     CXX: g++
-    CXXFLAGS: -O0 -fprofile-arcs -ftest-coverage -Wno-return-type
     DEFINES: _DEBUG DEBUG GPR_GCOV
     LD: gcc
     LDFLAGS: -fprofile-arcs -ftest-coverage -rdynamic
@@ -2548,20 +2625,17 @@ configs:
     valgrind: --tool=memcheck --leak-check=full
   msan:
     CC: clang
-    CFLAGS: -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer
+    CPPFLAGS: -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer
       -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument
       -fPIE -pie
     CXX: clang++
-    CXXFLAGS: -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer
-      -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument
-      -fPIE -pie
     DEFINES: NDEBUG
     LD: clang
     LDFLAGS: -fsanitize=memory -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1
       -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
     LDXX: clang++
     compile_the_world: true
-    timeout_multiplier: 1.5
+    timeout_multiplier: 2
   mutrace:
     CPPFLAGS: -O0
     DEFINES: _DEBUG DEBUG
@@ -2575,11 +2649,9 @@ configs:
     DEFINES: NDEBUG
   tsan:
     CC: clang
-    CFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
+    CPPFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
       -fPIE -pie
     CXX: clang++
-    CXXFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
-      -fPIE -pie
     LD: clang
     LDFLAGS: -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
     LDXX: clang++
@@ -2589,15 +2661,25 @@ configs:
     timeout_multiplier: 2
   ubsan:
     CC: clang
-    CFLAGS: -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
+    CPPFLAGS: -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
     CXX: clang++
-    CXXFLAGS: -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
     DEFINES: NDEBUG
     LD: clang
     LDFLAGS: -fsanitize=undefined
     LDXX: clang++
     compile_the_world: true
     timeout_multiplier: 1.5
+defaults:
+  boringssl:
+    CFLAGS: -Wno-sign-conversion -Wno-conversion -Wno-unused-value
+    CPPFLAGS: -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM
+      -D_GNU_SOURCE
+  global:
+    CPPFLAGS: -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
+    LDFLAGS: -g
+  zlib:
+    CFLAGS: -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration
+      $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
 node_modules:
 - deps:
   - grpc
diff --git a/examples/cpp/helloworld/Makefile b/examples/cpp/helloworld/Makefile
index f2093afa05529fac6c6852e0ae21755be015b7ab..6aa635913f68ca2b5ed0283182a16546d69ce1f2 100644
--- a/examples/cpp/helloworld/Makefile
+++ b/examples/cpp/helloworld/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -55,9 +55,11 @@ greeter_async_client: helloworld.pb.o helloworld.grpc.pb.o greeter_async_client.
 greeter_async_server: helloworld.pb.o helloworld.grpc.pb.o greeter_async_server.o
 	$(CXX) $^ $(LDFLAGS) -o $@
 
+.PRECIOUS: %.grpc.pb.cc
 %.grpc.pb.cc: %.proto
 	$(PROTOC) -I $(PROTOS_PATH) --grpc_out=. --plugin=protoc-gen-grpc=$(GRPC_CPP_PLUGIN_PATH) $<
 
+.PRECIOUS: %.pb.cc
 %.pb.cc: %.proto
 	$(PROTOC) -I $(PROTOS_PATH) --cpp_out=. $<
 
diff --git a/examples/cpp/helloworld/greeter_async_server.cc b/examples/cpp/helloworld/greeter_async_server.cc
index d06e7c714895a3083fc0a5e08e0fc55ec6a34f43..c9b1a67e9515ed9a161ab57e89a787aa6ac06f45 100644
--- a/examples/cpp/helloworld/greeter_async_server.cc
+++ b/examples/cpp/helloworld/greeter_async_server.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -67,7 +67,7 @@ class ServerImpl final {
     builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
     // Register "service_" as the instance through which we'll communicate with
     // clients. In this case it corresponds to an *asynchronous* service.
-    builder.RegisterAsyncService(&service_);
+    builder.RegisterService(&service_);
     // Get hold of the completion queue used for the asynchronous communication
     // with the gRPC runtime.
     cq_ = builder.AddCompletionQueue();
diff --git a/gRPC.podspec b/gRPC.podspec
index 18c05e2bd449945b0e00d986690d5631f9be7156..922b246c54cbb6aa222446c42e041f583dbd709a 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -101,6 +101,26 @@ Pod::Spec.new do |s|
                       'include/grpc/support/tls_msvc.h',
                       'include/grpc/support/tls_pthread.h',
                       'include/grpc/support/useful.h',
+                      'include/grpc/impl/codegen/alloc.h',
+                      'include/grpc/impl/codegen/atm.h',
+                      'include/grpc/impl/codegen/atm_gcc_atomic.h',
+                      'include/grpc/impl/codegen/atm_gcc_sync.h',
+                      'include/grpc/impl/codegen/atm_win32.h',
+                      'include/grpc/impl/codegen/byte_buffer.h',
+                      'include/grpc/impl/codegen/compression_types.h',
+                      'include/grpc/impl/codegen/connectivity_state.h',
+                      'include/grpc/impl/codegen/grpc_types.h',
+                      'include/grpc/impl/codegen/log.h',
+                      'include/grpc/impl/codegen/port_platform.h',
+                      'include/grpc/impl/codegen/propagation_bits.h',
+                      'include/grpc/impl/codegen/slice.h',
+                      'include/grpc/impl/codegen/slice_buffer.h',
+                      'include/grpc/impl/codegen/status.h',
+                      'include/grpc/impl/codegen/sync.h',
+                      'include/grpc/impl/codegen/sync_generic.h',
+                      'include/grpc/impl/codegen/sync_posix.h',
+                      'include/grpc/impl/codegen/sync_win32.h',
+                      'include/grpc/impl/codegen/time.h',
                       'src/core/profiling/basic_timers.c',
                       'src/core/profiling/stap_timers.c',
                       'src/core/support/alloc.c',
@@ -585,7 +605,7 @@ Pod::Spec.new do |s|
 
     ss.requires_arc = false
     ss.libraries = 'z'
-    ss.dependency 'BoringSSL', '~> 1.0'
+    ss.dependency 'BoringSSL', '~> 2.0'
 
     # ss.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
   end
diff --git a/grpc.gemspec b/grpc.gemspec
index 47b66ae535de02057e6b3e5dce2b8f45200680ea..7f11ec778a554f4c651f7aa91fc45665e937dacd 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -74,6 +74,26 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/support/tls_msvc.h )
   s.files += %w( include/grpc/support/tls_pthread.h )
   s.files += %w( include/grpc/support/useful.h )
+  s.files += %w( include/grpc/impl/codegen/alloc.h )
+  s.files += %w( include/grpc/impl/codegen/atm.h )
+  s.files += %w( include/grpc/impl/codegen/atm_gcc_atomic.h )
+  s.files += %w( include/grpc/impl/codegen/atm_gcc_sync.h )
+  s.files += %w( include/grpc/impl/codegen/atm_win32.h )
+  s.files += %w( include/grpc/impl/codegen/byte_buffer.h )
+  s.files += %w( include/grpc/impl/codegen/compression_types.h )
+  s.files += %w( include/grpc/impl/codegen/connectivity_state.h )
+  s.files += %w( include/grpc/impl/codegen/grpc_types.h )
+  s.files += %w( include/grpc/impl/codegen/log.h )
+  s.files += %w( include/grpc/impl/codegen/port_platform.h )
+  s.files += %w( include/grpc/impl/codegen/propagation_bits.h )
+  s.files += %w( include/grpc/impl/codegen/slice.h )
+  s.files += %w( include/grpc/impl/codegen/slice_buffer.h )
+  s.files += %w( include/grpc/impl/codegen/status.h )
+  s.files += %w( include/grpc/impl/codegen/sync.h )
+  s.files += %w( include/grpc/impl/codegen/sync_generic.h )
+  s.files += %w( include/grpc/impl/codegen/sync_posix.h )
+  s.files += %w( include/grpc/impl/codegen/sync_win32.h )
+  s.files += %w( include/grpc/impl/codegen/time.h )
   s.files += %w( src/core/profiling/timers.h )
   s.files += %w( src/core/support/block_annotate.h )
   s.files += %w( src/core/support/env.h )
diff --git a/include/grpc++/alarm.h b/include/grpc++/alarm.h
index 957d11c5000ce304396e430f7c9eb9c131c4bf5e..e2618195f08fa023816f799b58e93aa4bc5a8db6 100644
--- a/include/grpc++/alarm.h
+++ b/include/grpc++/alarm.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,14 +36,15 @@
 #ifndef GRPCXX_ALARM_H
 #define GRPCXX_ALARM_H
 
-#include <grpc++/completion_queue.h>
-#include <grpc++/impl/grpc_library.h>
-#include <grpc++/support/time.h>
+#include <grpc++/impl/codegen/grpc_library.h>
+#include <grpc++/impl/codegen/time.h>
 
 namespace grpc {
 
+class CompletionQueue;
+
 /// A thin wrapper around \a grpc_alarm (see / \a / src/core/surface/alarm.h).
-class Alarm : public GrpcLibrary {
+class Alarm : private GrpcLibrary {
  public:
   /// Create a completion queue alarm instance associated to \a cq.
   ///
diff --git a/include/grpc++/channel.h b/include/grpc++/channel.h
index 541be1345f80de8c48520d05f2c9772b65ca9512..80547f7ab8abbaf317eec042ed505d9a590051b2 100644
--- a/include/grpc++/channel.h
+++ b/include/grpc++/channel.h
@@ -36,99 +36,48 @@
 
 #include <memory>
 
-#include <grpc/grpc.h>
 #include <grpc++/impl/call.h>
-#include <grpc++/impl/grpc_library.h>
-#include <grpc++/support/config.h>
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/grpc_library.h>
+#include <grpc/grpc.h>
 
 struct grpc_channel;
 
 namespace grpc {
-class CallOpSetInterface;
-class ChannelArguments;
-class CompletionQueue;
-class ChannelCredentials;
-class SecureChannelCredentials;
-
-template <class R>
-class ClientReader;
-template <class W>
-class ClientWriter;
-template <class W, class R>
-class ClientReaderWriter;
-template <class R>
-class ClientAsyncReader;
-template <class W>
-class ClientAsyncWriter;
-template <class W, class R>
-class ClientAsyncReaderWriter;
-template <class R>
-class ClientAsyncResponseReader;
-
 /// Channels represent a connection to an endpoint. Created by \a CreateChannel.
-class Channel GRPC_FINAL : public GrpcLibrary,
+class Channel GRPC_FINAL : public ChannelInterface,
                            public CallHook,
-                           public std::enable_shared_from_this<Channel> {
+                           public std::enable_shared_from_this<Channel>,
+                           private GrpcLibrary {
  public:
   ~Channel();
 
   /// Get the current channel state. If the channel is in IDLE and
   /// \a try_to_connect is set to true, try to connect.
-  grpc_connectivity_state GetState(bool try_to_connect);
-
-  /// Return the \a tag on \a cq when the channel state is changed or \a
-  /// deadline expires. \a GetState needs to called to get the current state.
-  template <typename T>
-  void NotifyOnStateChange(grpc_connectivity_state last_observed, T deadline,
-                           CompletionQueue* cq, void* tag) {
-    TimePoint<T> deadline_tp(deadline);
-    NotifyOnStateChangeImpl(last_observed, deadline_tp.raw_time(), cq, tag);
-  }
-
-  /// Blocking wait for channel state change or \a deadline expiration.
-  /// \a GetState needs to called to get the current state.
-  template <typename T>
-  bool WaitForStateChange(grpc_connectivity_state last_observed, T deadline) {
-    TimePoint<T> deadline_tp(deadline);
-    return WaitForStateChangeImpl(last_observed, deadline_tp.raw_time());
-  }
+  grpc_connectivity_state GetState(bool try_to_connect) GRPC_OVERRIDE;
 
  private:
-  template <class R>
-  friend class ::grpc::ClientReader;
-  template <class W>
-  friend class ::grpc::ClientWriter;
-  template <class W, class R>
-  friend class ::grpc::ClientReaderWriter;
-  template <class R>
-  friend class ::grpc::ClientAsyncReader;
-  template <class W>
-  friend class ::grpc::ClientAsyncWriter;
-  template <class W, class R>
-  friend class ::grpc::ClientAsyncReaderWriter;
-  template <class R>
-  friend class ::grpc::ClientAsyncResponseReader;
   template <class InputMessage, class OutputMessage>
-  friend Status BlockingUnaryCall(Channel* channel, const RpcMethod& method,
+  friend Status BlockingUnaryCall(ChannelInterface* channel,
+                                  const RpcMethod& method,
                                   ClientContext* context,
                                   const InputMessage& request,
                                   OutputMessage* result);
-  friend class ::grpc::RpcMethod;
   friend std::shared_ptr<Channel> CreateChannelInternal(
       const grpc::string& host, grpc_channel* c_channel);
-
   Channel(const grpc::string& host, grpc_channel* c_channel);
 
   Call CreateCall(const RpcMethod& method, ClientContext* context,
-                  CompletionQueue* cq);
-  void PerformOpsOnCall(CallOpSetInterface* ops, Call* call);
-  void* RegisterMethod(const char* method);
+                  CompletionQueue* cq) GRPC_OVERRIDE;
+  void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) GRPC_OVERRIDE;
+  void* RegisterMethod(const char* method) GRPC_OVERRIDE;
 
   void NotifyOnStateChangeImpl(grpc_connectivity_state last_observed,
                                gpr_timespec deadline, CompletionQueue* cq,
-                               void* tag);
+                               void* tag) GRPC_OVERRIDE;
   bool WaitForStateChangeImpl(grpc_connectivity_state last_observed,
-                              gpr_timespec deadline);
+                              gpr_timespec deadline) GRPC_OVERRIDE;
 
   const grpc::string host_;
   grpc_channel* const c_channel_;  // owned
diff --git a/include/grpc++/client_context.h b/include/grpc++/client_context.h
index 4e8776e3beb6a3ad55166393f4295e46ba0820fb..3fbe6d1be80a6163dd47823e563f05c8cc2bdf6c 100644
--- a/include/grpc++/client_context.h
+++ b/include/grpc++/client_context.h
@@ -49,303 +49,6 @@
 #ifndef GRPCXX_CLIENT_CONTEXT_H
 #define GRPCXX_CLIENT_CONTEXT_H
 
-#include <map>
-#include <memory>
-#include <string>
-
-#include <grpc++/impl/sync.h>
-#include <grpc++/security/auth_context.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/status.h>
-#include <grpc++/support/string_ref.h>
-#include <grpc++/support/time.h>
-#include <grpc/compression.h>
-#include <grpc/grpc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/time.h>
-
-struct census_context;
-
-namespace grpc {
-
-class Channel;
-class CompletionQueue;
-class CallCredentials;
-class RpcMethod;
-template <class R>
-class ClientReader;
-template <class W>
-class ClientWriter;
-template <class W, class R>
-class ClientReaderWriter;
-template <class R>
-class ClientAsyncReader;
-template <class W>
-class ClientAsyncWriter;
-template <class W, class R>
-class ClientAsyncReaderWriter;
-template <class R>
-class ClientAsyncResponseReader;
-class ServerContext;
-
-/// Options for \a ClientContext::FromServerContext specifying which traits from
-/// the \a ServerContext to propagate (copy) from it into a new \a
-/// ClientContext.
-///
-/// \see ClientContext::FromServerContext
-class PropagationOptions {
- public:
-  PropagationOptions() : propagate_(GRPC_PROPAGATE_DEFAULTS) {}
-
-  PropagationOptions& enable_deadline_propagation() {
-    propagate_ |= GRPC_PROPAGATE_DEADLINE;
-    return *this;
-  }
-
-  PropagationOptions& disable_deadline_propagation() {
-    propagate_ &= ~GRPC_PROPAGATE_DEADLINE;
-    return *this;
-  }
-
-  PropagationOptions& enable_census_stats_propagation() {
-    propagate_ |= GRPC_PROPAGATE_CENSUS_STATS_CONTEXT;
-    return *this;
-  }
-
-  PropagationOptions& disable_census_stats_propagation() {
-    propagate_ &= ~GRPC_PROPAGATE_CENSUS_STATS_CONTEXT;
-    return *this;
-  }
-
-  PropagationOptions& enable_census_tracing_propagation() {
-    propagate_ |= GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT;
-    return *this;
-  }
-
-  PropagationOptions& disable_census_tracing_propagation() {
-    propagate_ &= ~GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT;
-    return *this;
-  }
-
-  PropagationOptions& enable_cancellation_propagation() {
-    propagate_ |= GRPC_PROPAGATE_CANCELLATION;
-    return *this;
-  }
-
-  PropagationOptions& disable_cancellation_propagation() {
-    propagate_ &= ~GRPC_PROPAGATE_CANCELLATION;
-    return *this;
-  }
-
-  uint32_t c_bitmask() const { return propagate_; }
-
- private:
-  uint32_t propagate_;
-};
-
-namespace testing {
-class InteropClientContextInspector;
-}  // namespace testing
-
-class ClientContext {
- public:
-  ClientContext();
-  ~ClientContext();
-
-  /// Create a new \a ClientContext as a child of an incoming server call,
-  /// according to \a options (\see PropagationOptions).
-  ///
-  /// \param server_context The source server context to use as the basis for
-  /// constructing the client context.
-  /// \param options The options controlling what to copy from the \a
-  /// server_context.
-  ///
-  /// \return A newly constructed \a ClientContext instance based on \a
-  /// server_context, with traits propagated (copied) according to \a options.
-  static std::unique_ptr<ClientContext> FromServerContext(
-      const ServerContext& server_context,
-      PropagationOptions options = PropagationOptions());
-
-  /// Add the (\a meta_key, \a meta_value) pair to the metadata associated with
-  /// a client call. These are made available at the server side by the \a
-  /// grpc::ServerContext::client_metadata() method.
-  ///
-  /// \warning This method should only be called before invoking the rpc.
-  ///
-  /// \param meta_key The metadata key. If \a meta_value is binary data, it must
-  /// end in "-bin".
-  /// \param meta_value The metadata value. If its value is binary, it must be
-  /// base64-encoding (see https://tools.ietf.org/html/rfc4648#section-4) and \a
-  /// meta_key must end in "-bin".
-  void AddMetadata(const grpc::string& meta_key,
-                   const grpc::string& meta_value);
-
-  /// Return a collection of initial metadata key-value pairs. Note that keys
-  /// may happen more than once (ie, a \a std::multimap is returned).
-  ///
-  /// \warning This method should only be called after initial metadata has been
-  /// received. For streaming calls, see \a
-  /// ClientReaderInterface::WaitForInitialMetadata().
-  ///
-  /// \return A multimap of initial metadata key-value pairs from the server.
-  const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerInitialMetadata() {
-    GPR_ASSERT(initial_metadata_received_);
-    return recv_initial_metadata_;
-  }
-
-  /// Return a collection of trailing metadata key-value pairs. Note that keys
-  /// may happen more than once (ie, a \a std::multimap is returned).
-  ///
-  /// \warning This method is only callable once the stream has finished.
-  ///
-  /// \return A multimap of metadata trailing key-value pairs from the server.
-  const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerTrailingMetadata() {
-    // TODO(yangg) check finished
-    return trailing_metadata_;
-  }
-
-  /// Set the deadline for the client call.
-  ///
-  /// \warning This method should only be called before invoking the rpc.
-  ///
-  /// \param deadline the deadline for the client call. Units are determined by
-  /// the type used.
-  template <typename T>
-  void set_deadline(const T& deadline) {
-    TimePoint<T> deadline_tp(deadline);
-    deadline_ = deadline_tp.raw_time();
-  }
-
-#ifndef GRPC_CXX0X_NO_CHRONO
-  /// Return the deadline for the client call.
-  std::chrono::system_clock::time_point deadline() {
-    return Timespec2Timepoint(deadline_);
-  }
-#endif  // !GRPC_CXX0X_NO_CHRONO
-
-  /// Return a \a gpr_timespec representation of the client call's deadline.
-  gpr_timespec raw_deadline() { return deadline_; }
-
-  /// Set the per call authority header (see
-  /// https://tools.ietf.org/html/rfc7540#section-8.1.2.3).
-  void set_authority(const grpc::string& authority) { authority_ = authority; }
-
-  /// Return the authentication context for this client call.
-  ///
-  /// \see grpc::AuthContext.
-  std::shared_ptr<const AuthContext> auth_context() const;
-
-  /// Set credentials for the client call.
-  ///
-  /// A credentials object encapsulates all the state needed by a client to
-  /// authenticate with a server and make various assertions, e.g., about the
-  /// client’s identity, role, or whether it is authorized to make a particular
-  /// call.
-  ///
-  /// \see  http://www.grpc.io/docs/guides/auth.html
-  void set_credentials(const std::shared_ptr<CallCredentials>& creds) {
-    creds_ = creds;
-  }
-
-  /// Return the compression algorithm to be used by the client call.
-  grpc_compression_algorithm compression_algorithm() const {
-    return compression_algorithm_;
-  }
-
-  /// Set \a algorithm to be the compression algorithm used for the client call.
-  ///
-  /// \param algorith The compression algorithm used for the client call.
-  void set_compression_algorithm(grpc_compression_algorithm algorithm);
-
-  /// Return the peer uri in a string.
-  ///
-  /// \warning This value is never authenticated or subject to any security
-  /// related code. It must not be used for any authentication related
-  /// functionality. Instead, use auth_context.
-  ///
-  /// \return The call's peer URI.
-  grpc::string peer() const;
-
-  /// Get and set census context.
-  void set_census_context(struct census_context* ccp) { census_context_ = ccp; }
-  struct census_context* census_context() const {
-    return census_context_;
-  }
-
-  /// Send a best-effort out-of-band cancel. The call could be in any stage.
-  /// e.g. if it is already finished, it may still return success.
-  ///
-  /// There is no guarantee the call will be cancelled.
-  void TryCancel();
-
-  /// Global Callbacks
-  ///
-  /// Can be set exactly once per application to install hooks whenever
-  /// a client context is constructed and destructed.
-  class GlobalCallbacks {
-   public:
-    virtual ~GlobalCallbacks() {}
-    virtual void DefaultConstructor(ClientContext* context) = 0;
-    virtual void Destructor(ClientContext* context) = 0;
-  };
-  static void SetGlobalCallbacks(GlobalCallbacks* callbacks);
-
- private:
-  // Disallow copy and assign.
-  ClientContext(const ClientContext&);
-  ClientContext& operator=(const ClientContext&);
-
-  friend class ::grpc::testing::InteropClientContextInspector;
-  friend class CallOpClientRecvStatus;
-  friend class CallOpRecvInitialMetadata;
-  friend class Channel;
-  template <class R>
-  friend class ::grpc::ClientReader;
-  template <class W>
-  friend class ::grpc::ClientWriter;
-  template <class W, class R>
-  friend class ::grpc::ClientReaderWriter;
-  template <class R>
-  friend class ::grpc::ClientAsyncReader;
-  template <class W>
-  friend class ::grpc::ClientAsyncWriter;
-  template <class W, class R>
-  friend class ::grpc::ClientAsyncReaderWriter;
-  template <class R>
-  friend class ::grpc::ClientAsyncResponseReader;
-  template <class InputMessage, class OutputMessage>
-  friend Status BlockingUnaryCall(Channel* channel, const RpcMethod& method,
-                                  ClientContext* context,
-                                  const InputMessage& request,
-                                  OutputMessage* result);
-
-  grpc_call* call() { return call_; }
-  void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
-
-  grpc::string authority() { return authority_; }
-
-  bool initial_metadata_received_;
-  std::shared_ptr<Channel> channel_;
-  grpc::mutex mu_;
-  grpc_call* call_;
-  bool call_canceled_;
-  gpr_timespec deadline_;
-  grpc::string authority_;
-  std::shared_ptr<CallCredentials> creds_;
-  mutable std::shared_ptr<const AuthContext> auth_context_;
-  struct census_context* census_context_;
-  std::multimap<grpc::string, grpc::string> send_initial_metadata_;
-  std::multimap<grpc::string_ref, grpc::string_ref> recv_initial_metadata_;
-  std::multimap<grpc::string_ref, grpc::string_ref> trailing_metadata_;
-
-  grpc_call* propagate_from_call_;
-  PropagationOptions propagation_options_;
-
-  grpc_compression_algorithm compression_algorithm_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/client_context.h>
 
 #endif  // GRPCXX_CLIENT_CONTEXT_H
diff --git a/include/grpc++/completion_queue.h b/include/grpc++/completion_queue.h
index 5c2bc202c334ef7ef8867a413385637a8d047c7d..f53f5ee56c0e16f4e70465215652c21dce180b95 100644
--- a/include/grpc++/completion_queue.h
+++ b/include/grpc++/completion_queue.h
@@ -31,182 +31,9 @@
  *
  */
 
-/// A completion queue implements a concurrent producer-consumer queue, with two
-/// main methods, \a Next and \a AsyncNext.
 #ifndef GRPCXX_COMPLETION_QUEUE_H
 #define GRPCXX_COMPLETION_QUEUE_H
 
-#include <grpc/support/time.h>
-#include <grpc++/impl/grpc_library.h>
-#include <grpc++/support/status.h>
-#include <grpc++/support/time.h>
-
-struct grpc_completion_queue;
-
-namespace grpc {
-
-template <class R>
-class ClientReader;
-template <class W>
-class ClientWriter;
-template <class W, class R>
-class ClientReaderWriter;
-template <class R>
-class ServerReader;
-template <class W>
-class ServerWriter;
-template <class W, class R>
-class ServerReaderWriter;
-template <class ServiceType, class RequestType, class ResponseType>
-class RpcMethodHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class ClientStreamingHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class ServerStreamingHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class BidiStreamingHandler;
-class UnknownMethodHandler;
-
-class Channel;
-class ClientContext;
-class CompletionQueueTag;
-class CompletionQueue;
-class RpcMethod;
-class Server;
-class ServerBuilder;
-class ServerContext;
-
-/// A thin wrapper around \a grpc_completion_queue (see / \a
-/// src/core/surface/completion_queue.h).
-class CompletionQueue : public GrpcLibrary {
- public:
-  /// Default constructor. Implicitly creates a \a grpc_completion_queue
-  /// instance.
-  CompletionQueue();
-
-  /// Wrap \a take, taking ownership of the instance.
-  ///
-  /// \param take The completion queue instance to wrap. Ownership is taken.
-  explicit CompletionQueue(grpc_completion_queue* take);
-
-  /// Destructor. Destroys the owned wrapped completion queue / instance.
-  ~CompletionQueue() GRPC_OVERRIDE;
-
-  /// Tri-state return for AsyncNext: SHUTDOWN, GOT_EVENT, TIMEOUT.
-  enum NextStatus {
-    SHUTDOWN,   ///< The completion queue has been shutdown.
-    GOT_EVENT,  ///< Got a new event; \a tag will be filled in with its
-                ///< associated value; \a ok indicating its success.
-    TIMEOUT     ///< deadline was reached.
-  };
-
-  /// Read from the queue, blocking up to \a deadline (or the queue's shutdown).
-  /// Both \a tag and \a ok are updated upon success (if an event is available
-  /// within the \a deadline).  A \a tag points to an arbitrary location usually
-  /// employed to uniquely identify an event.
-  ///
-  /// \param tag[out] Upon sucess, updated to point to the event's tag.
-  /// \param ok[out] Upon sucess, true if read a regular event, false otherwise.
-  /// \param deadline[in] How long to block in wait for an event.
-  ///
-  /// \return The type of event read.
-  template <typename T>
-  NextStatus AsyncNext(void** tag, bool* ok, const T& deadline) {
-    TimePoint<T> deadline_tp(deadline);
-    return AsyncNextInternal(tag, ok, deadline_tp.raw_time());
-  }
-
-  /// Read from the queue, blocking until an event is available or the queue is
-  /// shutting down.
-  ///
-  /// \param tag[out] Updated to point to the read event's tag.
-  /// \param ok[out] true if read a regular event, false otherwise.
-  ///
-  /// \return true if read a regular event, false if the queue is shutting down.
-  bool Next(void** tag, bool* ok) {
-    return (AsyncNextInternal(tag, ok, gpr_inf_future(GPR_CLOCK_REALTIME)) !=
-            SHUTDOWN);
-  }
-
-  /// Request the shutdown of the queue.
-  ///
-  /// \warning This method must be called at some point. Once invoked, \a Next
-  /// will start to return false and \a AsyncNext will return \a
-  /// NextStatus::SHUTDOWN. Only once either one of these methods does that
-  /// (that is, once the queue has been \em drained) can an instance of this
-  /// class be destroyed.
-  void Shutdown();
-
-  /// Returns a \em raw pointer to the underlying \a grpc_completion_queue
-  /// instance.
-  ///
-  /// \warning Remember that the returned instance is owned. No transfer of
-  /// owership is performed.
-  grpc_completion_queue* cq() { return cq_; }
-
- private:
-  // Friend synchronous wrappers so that they can access Pluck(), which is
-  // a semi-private API geared towards the synchronous implementation.
-  template <class R>
-  friend class ::grpc::ClientReader;
-  template <class W>
-  friend class ::grpc::ClientWriter;
-  template <class W, class R>
-  friend class ::grpc::ClientReaderWriter;
-  template <class R>
-  friend class ::grpc::ServerReader;
-  template <class W>
-  friend class ::grpc::ServerWriter;
-  template <class W, class R>
-  friend class ::grpc::ServerReaderWriter;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class RpcMethodHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class ClientStreamingHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class ServerStreamingHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class BidiStreamingHandler;
-  friend class UnknownMethodHandler;
-  friend class ::grpc::Server;
-  friend class ::grpc::ServerContext;
-  template <class InputMessage, class OutputMessage>
-  friend Status BlockingUnaryCall(Channel* channel, const RpcMethod& method,
-                                  ClientContext* context,
-                                  const InputMessage& request,
-                                  OutputMessage* result);
-
-  NextStatus AsyncNextInternal(void** tag, bool* ok, gpr_timespec deadline);
-
-  /// Wraps \a grpc_completion_queue_pluck.
-  /// \warning Must not be mixed with calls to \a Next.
-  bool Pluck(CompletionQueueTag* tag);
-
-  /// Performs a single polling pluck on \a tag.
-  void TryPluck(CompletionQueueTag* tag);
-
-  grpc_completion_queue* cq_;  // owned
-};
-
-/// An interface allowing implementors to process and filter event tags.
-class CompletionQueueTag {
- public:
-  virtual ~CompletionQueueTag() {}
-  // Called prior to returning from Next(), return value is the status of the
-  // operation (return status is the default thing to do). If this function
-  // returns false, the tag is dropped and not returned from the completion
-  // queue
-  virtual bool FinalizeResult(void** tag, bool* status) = 0;
-};
-
-/// A specific type of completion queue used by the processing of notifications
-/// by servers. Instantiated by \a ServerBuilder.
-class ServerCompletionQueue : public CompletionQueue {
- private:
-  friend class ServerBuilder;
-  ServerCompletionQueue() {}
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/completion_queue.h>
 
 #endif  // GRPCXX_COMPLETION_QUEUE_H
diff --git a/include/grpc++/generic/async_generic_service.h b/include/grpc++/generic/async_generic_service.h
index 57a2696b3b4ace735fb0351e1df2c205dac6fd10..9ae8391dc4cff02ecf692ec84da9407e7bf181a6 100644
--- a/include/grpc++/generic/async_generic_service.h
+++ b/include/grpc++/generic/async_generic_service.h
@@ -51,6 +51,7 @@ class GenericServerContext GRPC_FINAL : public ServerContext {
 
  private:
   friend class Server;
+  friend class ServerInterface;
 
   grpc::string method_;
   grpc::string host_;
@@ -58,11 +59,7 @@ class GenericServerContext GRPC_FINAL : public ServerContext {
 
 class AsyncGenericService GRPC_FINAL {
  public:
-  // TODO(yangg) Once we can add multiple completion queues to the server
-  // in c core, add a CompletionQueue* argument to the ctor here.
-  // TODO(yangg) support methods list.
   AsyncGenericService() : server_(nullptr) {}
-  AsyncGenericService(const grpc::string& methods) : server_(nullptr) {}
 
   void RequestCall(GenericServerContext* ctx,
                    GenericServerAsyncReaderWriter* reader_writer,
diff --git a/include/grpc++/generic/generic_stub.h b/include/grpc++/generic/generic_stub.h
index 1bb7900b0684fc5d4f6c96ecf5c96598d87b5ac1..5ac0371efb72d9db6e499b26748182af5d08a98b 100644
--- a/include/grpc++/generic/generic_stub.h
+++ b/include/grpc++/generic/generic_stub.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,8 @@ typedef ClientAsyncReaderWriter<ByteBuffer, ByteBuffer>
 // by name.
 class GenericStub GRPC_FINAL {
  public:
-  explicit GenericStub(std::shared_ptr<Channel> channel) : channel_(channel) {}
+  explicit GenericStub(std::shared_ptr<ChannelInterface> channel)
+      : channel_(channel) {}
 
   // begin a call to a named method
   std::unique_ptr<GenericClientAsyncReaderWriter> Call(
@@ -55,7 +56,7 @@ class GenericStub GRPC_FINAL {
       void* tag);
 
  private:
-  std::shared_ptr<Channel> channel_;
+  std::shared_ptr<ChannelInterface> channel_;
 };
 
 }  // namespace grpc
diff --git a/include/grpc++/impl/call.h b/include/grpc++/impl/call.h
index cb7856bfbe62e73a17c7c47d3639d3542dc8892f..64b6563574d56196ea40d6e457a042effac928aa 100644
--- a/include/grpc++/impl/call.h
+++ b/include/grpc++/impl/call.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,549 +34,6 @@
 #ifndef GRPCXX_IMPL_CALL_H
 #define GRPCXX_IMPL_CALL_H
 
-#include <functional>
-#include <memory>
-#include <map>
-#include <cstring>
-
-#include <grpc/support/alloc.h>
-#include <grpc++/client_context.h>
-#include <grpc++/completion_queue.h>
-#include <grpc++/impl/serialization_traits.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/status.h>
-
-struct grpc_call;
-struct grpc_op;
-
-namespace grpc {
-
-class ByteBuffer;
-class Call;
-
-void FillMetadataMap(
-    grpc_metadata_array* arr,
-    std::multimap<grpc::string_ref, grpc::string_ref>* metadata);
-grpc_metadata* FillMetadataArray(
-    const std::multimap<grpc::string, grpc::string>& metadata);
-
-/// Per-message write options.
-class WriteOptions {
- public:
-  WriteOptions() : flags_(0) {}
-  WriteOptions(const WriteOptions& other) : flags_(other.flags_) {}
-
-  /// Clear all flags.
-  inline void Clear() { flags_ = 0; }
-
-  /// Returns raw flags bitset.
-  inline uint32_t flags() const { return flags_; }
-
-  /// Sets flag for the disabling of compression for the next message write.
-  ///
-  /// \sa GRPC_WRITE_NO_COMPRESS
-  inline WriteOptions& set_no_compression() {
-    SetBit(GRPC_WRITE_NO_COMPRESS);
-    return *this;
-  }
-
-  /// Clears flag for the disabling of compression for the next message write.
-  ///
-  /// \sa GRPC_WRITE_NO_COMPRESS
-  inline WriteOptions& clear_no_compression() {
-    ClearBit(GRPC_WRITE_NO_COMPRESS);
-    return *this;
-  }
-
-  /// Get value for the flag indicating whether compression for the next
-  /// message write is forcefully disabled.
-  ///
-  /// \sa GRPC_WRITE_NO_COMPRESS
-  inline bool get_no_compression() const {
-    return GetBit(GRPC_WRITE_NO_COMPRESS);
-  }
-
-  /// Sets flag indicating that the write may be buffered and need not go out on
-  /// the wire immediately.
-  ///
-  /// \sa GRPC_WRITE_BUFFER_HINT
-  inline WriteOptions& set_buffer_hint() {
-    SetBit(GRPC_WRITE_BUFFER_HINT);
-    return *this;
-  }
-
-  /// Clears flag indicating that the write may be buffered and need not go out
-  /// on the wire immediately.
-  ///
-  /// \sa GRPC_WRITE_BUFFER_HINT
-  inline WriteOptions& clear_buffer_hint() {
-    ClearBit(GRPC_WRITE_BUFFER_HINT);
-    return *this;
-  }
-
-  /// Get value for the flag indicating that the write may be buffered and need
-  /// not go out on the wire immediately.
-  ///
-  /// \sa GRPC_WRITE_BUFFER_HINT
-  inline bool get_buffer_hint() const { return GetBit(GRPC_WRITE_BUFFER_HINT); }
-
-  WriteOptions& operator=(const WriteOptions& rhs) {
-    flags_ = rhs.flags_;
-    return *this;
-  }
-
- private:
-  void SetBit(const uint32_t mask) { flags_ |= mask; }
-
-  void ClearBit(const uint32_t mask) { flags_ &= ~mask; }
-
-  bool GetBit(const uint32_t mask) const { return (flags_ & mask) != 0; }
-
-  uint32_t flags_;
-};
-
-/// Default argument for CallOpSet. I is unused by the class, but can be
-/// used for generating multiple names for the same thing.
-template <int I>
-class CallNoOp {
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {}
-  void FinishOp(bool* status, int max_message_size) {}
-};
-
-class CallOpSendInitialMetadata {
- public:
-  CallOpSendInitialMetadata() : send_(false) {}
-
-  void SendInitialMetadata(
-      const std::multimap<grpc::string, grpc::string>& metadata) {
-    send_ = true;
-    initial_metadata_count_ = metadata.size();
-    initial_metadata_ = FillMetadataArray(metadata);
-  }
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (!send_) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_SEND_INITIAL_METADATA;
-    op->flags = 0;
-    op->reserved = NULL;
-    op->data.send_initial_metadata.count = initial_metadata_count_;
-    op->data.send_initial_metadata.metadata = initial_metadata_;
-  }
-  void FinishOp(bool* status, int max_message_size) {
-    if (!send_) return;
-    gpr_free(initial_metadata_);
-    send_ = false;
-  }
-
-  bool send_;
-  size_t initial_metadata_count_;
-  grpc_metadata* initial_metadata_;
-};
-
-class CallOpSendMessage {
- public:
-  CallOpSendMessage() : send_buf_(nullptr), own_buf_(false) {}
-
-  /// Send \a message using \a options for the write. The \a options are cleared
-  /// after use.
-  template <class M>
-  Status SendMessage(const M& message,
-                     const WriteOptions& options) GRPC_MUST_USE_RESULT;
-
-  template <class M>
-  Status SendMessage(const M& message) GRPC_MUST_USE_RESULT;
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (send_buf_ == nullptr) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_SEND_MESSAGE;
-    op->flags = write_options_.flags();
-    op->reserved = NULL;
-    op->data.send_message = send_buf_;
-    // Flags are per-message: clear them after use.
-    write_options_.Clear();
-  }
-  void FinishOp(bool* status, int max_message_size) {
-    if (own_buf_) grpc_byte_buffer_destroy(send_buf_);
-    send_buf_ = nullptr;
-  }
-
- private:
-  grpc_byte_buffer* send_buf_;
-  WriteOptions write_options_;
-  bool own_buf_;
-};
-
-template <class M>
-Status CallOpSendMessage::SendMessage(const M& message,
-                                      const WriteOptions& options) {
-  write_options_ = options;
-  return SerializationTraits<M>::Serialize(message, &send_buf_, &own_buf_);
-}
-
-template <class M>
-Status CallOpSendMessage::SendMessage(const M& message) {
-  return SendMessage(message, WriteOptions());
-}
-
-template <class R>
-class CallOpRecvMessage {
- public:
-  CallOpRecvMessage() : got_message(false), message_(nullptr) {}
-
-  void RecvMessage(R* message) { message_ = message; }
-
-  bool got_message;
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (message_ == nullptr) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_RECV_MESSAGE;
-    op->flags = 0;
-    op->reserved = NULL;
-    op->data.recv_message = &recv_buf_;
-  }
-
-  void FinishOp(bool* status, int max_message_size) {
-    if (message_ == nullptr) return;
-    if (recv_buf_) {
-      if (*status) {
-        got_message = true;
-        *status = SerializationTraits<R>::Deserialize(recv_buf_, message_,
-                                                      max_message_size).ok();
-      } else {
-        got_message = false;
-        grpc_byte_buffer_destroy(recv_buf_);
-      }
-    } else {
-      got_message = false;
-      *status = false;
-    }
-    message_ = nullptr;
-  }
-
- private:
-  R* message_;
-  grpc_byte_buffer* recv_buf_;
-};
-
-namespace CallOpGenericRecvMessageHelper {
-class DeserializeFunc {
- public:
-  virtual Status Deserialize(grpc_byte_buffer* buf, int max_message_size) = 0;
-};
-
-template <class R>
-class DeserializeFuncType GRPC_FINAL : public DeserializeFunc {
- public:
-  DeserializeFuncType(R* message) : message_(message) {}
-  Status Deserialize(grpc_byte_buffer* buf,
-                     int max_message_size) GRPC_OVERRIDE {
-    return SerializationTraits<R>::Deserialize(buf, message_, max_message_size);
-  }
-
- private:
-  R* message_;  // Not a managed pointer because management is external to this
-};
-}  // namespace CallOpGenericRecvMessageHelper
-
-class CallOpGenericRecvMessage {
- public:
-  CallOpGenericRecvMessage() : got_message(false) {}
-
-  template <class R>
-  void RecvMessage(R* message) {
-    deserialize_.reset(
-        new CallOpGenericRecvMessageHelper::DeserializeFuncType<R>(message));
-  }
-
-  bool got_message;
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (!deserialize_) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_RECV_MESSAGE;
-    op->flags = 0;
-    op->reserved = NULL;
-    op->data.recv_message = &recv_buf_;
-  }
-
-  void FinishOp(bool* status, int max_message_size) {
-    if (!deserialize_) return;
-    if (recv_buf_) {
-      if (*status) {
-        got_message = true;
-        *status = deserialize_->Deserialize(recv_buf_, max_message_size).ok();
-      } else {
-        got_message = false;
-        grpc_byte_buffer_destroy(recv_buf_);
-      }
-    } else {
-      got_message = false;
-      *status = false;
-    }
-    deserialize_.reset();
-  }
-
- private:
-  std::unique_ptr<CallOpGenericRecvMessageHelper::DeserializeFunc> deserialize_;
-  grpc_byte_buffer* recv_buf_;
-};
-
-class CallOpClientSendClose {
- public:
-  CallOpClientSendClose() : send_(false) {}
-
-  void ClientSendClose() { send_ = true; }
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (!send_) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-    op->flags = 0;
-    op->reserved = NULL;
-  }
-  void FinishOp(bool* status, int max_message_size) { send_ = false; }
-
- private:
-  bool send_;
-};
-
-class CallOpServerSendStatus {
- public:
-  CallOpServerSendStatus() : send_status_available_(false) {}
-
-  void ServerSendStatus(
-      const std::multimap<grpc::string, grpc::string>& trailing_metadata,
-      const Status& status) {
-    trailing_metadata_count_ = trailing_metadata.size();
-    trailing_metadata_ = FillMetadataArray(trailing_metadata);
-    send_status_available_ = true;
-    send_status_code_ = static_cast<grpc_status_code>(status.error_code());
-    send_status_details_ = status.error_message();
-  }
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (!send_status_available_) return;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
-    op->data.send_status_from_server.trailing_metadata_count =
-        trailing_metadata_count_;
-    op->data.send_status_from_server.trailing_metadata = trailing_metadata_;
-    op->data.send_status_from_server.status = send_status_code_;
-    op->data.send_status_from_server.status_details =
-        send_status_details_.empty() ? nullptr : send_status_details_.c_str();
-    op->flags = 0;
-    op->reserved = NULL;
-  }
-
-  void FinishOp(bool* status, int max_message_size) {
-    if (!send_status_available_) return;
-    gpr_free(trailing_metadata_);
-    send_status_available_ = false;
-  }
-
- private:
-  bool send_status_available_;
-  grpc_status_code send_status_code_;
-  grpc::string send_status_details_;
-  size_t trailing_metadata_count_;
-  grpc_metadata* trailing_metadata_;
-};
-
-class CallOpRecvInitialMetadata {
- public:
-  CallOpRecvInitialMetadata() : recv_initial_metadata_(nullptr) {}
-
-  void RecvInitialMetadata(ClientContext* context) {
-    context->initial_metadata_received_ = true;
-    recv_initial_metadata_ = &context->recv_initial_metadata_;
-  }
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (!recv_initial_metadata_) return;
-    memset(&recv_initial_metadata_arr_, 0, sizeof(recv_initial_metadata_arr_));
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_RECV_INITIAL_METADATA;
-    op->data.recv_initial_metadata = &recv_initial_metadata_arr_;
-    op->flags = 0;
-    op->reserved = NULL;
-  }
-  void FinishOp(bool* status, int max_message_size) {
-    if (recv_initial_metadata_ == nullptr) return;
-    FillMetadataMap(&recv_initial_metadata_arr_, recv_initial_metadata_);
-    recv_initial_metadata_ = nullptr;
-  }
-
- private:
-  std::multimap<grpc::string_ref, grpc::string_ref>* recv_initial_metadata_;
-  grpc_metadata_array recv_initial_metadata_arr_;
-};
-
-class CallOpClientRecvStatus {
- public:
-  CallOpClientRecvStatus() : recv_status_(nullptr) {}
-
-  void ClientRecvStatus(ClientContext* context, Status* status) {
-    recv_trailing_metadata_ = &context->trailing_metadata_;
-    recv_status_ = status;
-  }
-
- protected:
-  void AddOp(grpc_op* ops, size_t* nops) {
-    if (recv_status_ == nullptr) return;
-    memset(&recv_trailing_metadata_arr_, 0,
-           sizeof(recv_trailing_metadata_arr_));
-    status_details_ = nullptr;
-    status_details_capacity_ = 0;
-    grpc_op* op = &ops[(*nops)++];
-    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-    op->data.recv_status_on_client.trailing_metadata =
-        &recv_trailing_metadata_arr_;
-    op->data.recv_status_on_client.status = &status_code_;
-    op->data.recv_status_on_client.status_details = &status_details_;
-    op->data.recv_status_on_client.status_details_capacity =
-        &status_details_capacity_;
-    op->flags = 0;
-    op->reserved = NULL;
-  }
-
-  void FinishOp(bool* status, int max_message_size) {
-    if (recv_status_ == nullptr) return;
-    FillMetadataMap(&recv_trailing_metadata_arr_, recv_trailing_metadata_);
-    *recv_status_ = Status(
-        static_cast<StatusCode>(status_code_),
-        status_details_ ? grpc::string(status_details_) : grpc::string());
-    gpr_free(status_details_);
-    recv_status_ = nullptr;
-  }
-
- private:
-  std::multimap<grpc::string_ref, grpc::string_ref>* recv_trailing_metadata_;
-  Status* recv_status_;
-  grpc_metadata_array recv_trailing_metadata_arr_;
-  grpc_status_code status_code_;
-  char* status_details_;
-  size_t status_details_capacity_;
-};
-
-/// An abstract collection of call ops, used to generate the
-/// grpc_call_op structure to pass down to the lower layers,
-/// and as it is-a CompletionQueueTag, also massages the final
-/// completion into the correct form for consumption in the C++
-/// API.
-class CallOpSetInterface : public CompletionQueueTag {
- public:
-  CallOpSetInterface() : max_message_size_(0) {}
-  /// Fills in grpc_op, starting from ops[*nops] and moving
-  /// upwards.
-  virtual void FillOps(grpc_op* ops, size_t* nops) = 0;
-
-  void set_max_message_size(int max_message_size) {
-    max_message_size_ = max_message_size;
-  }
-
- protected:
-  int max_message_size_;
-};
-
-/// Primary implementaiton of CallOpSetInterface.
-/// Since we cannot use variadic templates, we declare slots up to
-/// the maximum count of ops we'll need in a set. We leverage the
-/// empty base class optimization to slim this class (especially
-/// when there are many unused slots used). To avoid duplicate base classes,
-/// the template parmeter for CallNoOp is varied by argument position.
-template <class Op1 = CallNoOp<1>, class Op2 = CallNoOp<2>,
-          class Op3 = CallNoOp<3>, class Op4 = CallNoOp<4>,
-          class Op5 = CallNoOp<5>, class Op6 = CallNoOp<6>>
-class CallOpSet : public CallOpSetInterface,
-                  public Op1,
-                  public Op2,
-                  public Op3,
-                  public Op4,
-                  public Op5,
-                  public Op6 {
- public:
-  CallOpSet() : return_tag_(this) {}
-  void FillOps(grpc_op* ops, size_t* nops) GRPC_OVERRIDE {
-    this->Op1::AddOp(ops, nops);
-    this->Op2::AddOp(ops, nops);
-    this->Op3::AddOp(ops, nops);
-    this->Op4::AddOp(ops, nops);
-    this->Op5::AddOp(ops, nops);
-    this->Op6::AddOp(ops, nops);
-  }
-
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
-    this->Op1::FinishOp(status, max_message_size_);
-    this->Op2::FinishOp(status, max_message_size_);
-    this->Op3::FinishOp(status, max_message_size_);
-    this->Op4::FinishOp(status, max_message_size_);
-    this->Op5::FinishOp(status, max_message_size_);
-    this->Op6::FinishOp(status, max_message_size_);
-    *tag = return_tag_;
-    return true;
-  }
-
-  void set_output_tag(void* return_tag) { return_tag_ = return_tag; }
-
- private:
-  void* return_tag_;
-};
-
-/// A CallOpSet that does not post completions to the completion queue.
-///
-/// Allows hiding some completions that the C core must generate from
-/// C++ users.
-template <class Op1 = CallNoOp<1>, class Op2 = CallNoOp<2>,
-          class Op3 = CallNoOp<3>, class Op4 = CallNoOp<4>,
-          class Op5 = CallNoOp<5>, class Op6 = CallNoOp<6>>
-class SneakyCallOpSet : public CallOpSet<Op1, Op2, Op3, Op4, Op5, Op6> {
- public:
-  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
-    typedef CallOpSet<Op1, Op2, Op3, Op4, Op5, Op6> Base;
-    return Base::FinalizeResult(tag, status) && false;
-  }
-};
-
-// Channel and Server implement this to allow them to hook performing ops
-class CallHook {
- public:
-  virtual ~CallHook() {}
-  virtual void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) = 0;
-};
-
-// Straightforward wrapping of the C call object
-class Call GRPC_FINAL {
- public:
-  /* call is owned by the caller */
-  Call(grpc_call* call, CallHook* call_hook_, CompletionQueue* cq);
-  Call(grpc_call* call, CallHook* call_hook_, CompletionQueue* cq,
-       int max_message_size);
-
-  void PerformOps(CallOpSetInterface* ops);
-
-  grpc_call* call() { return call_; }
-  CompletionQueue* cq() { return cq_; }
-
-  int max_message_size() { return max_message_size_; }
-
- private:
-  CallHook* call_hook_;
-  CompletionQueue* cq_;
-  grpc_call* call_;
-  int max_message_size_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/call.h>
 
 #endif  // GRPCXX_IMPL_CALL_H
diff --git a/include/grpc++/impl/client_unary_call.h b/include/grpc++/impl/client_unary_call.h
index 4cdc800267aea0db2a912bafff0a951459066ed4..abe321eaccd718f3f02b16296f9881838cddd5e0 100644
--- a/include/grpc++/impl/client_unary_call.h
+++ b/include/grpc++/impl/client_unary_call.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,41 +34,6 @@
 #ifndef GRPCXX_IMPL_CLIENT_UNARY_CALL_H
 #define GRPCXX_IMPL_CLIENT_UNARY_CALL_H
 
-#include <grpc++/impl/call.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-class Channel;
-class ClientContext;
-class CompletionQueue;
-class RpcMethod;
-
-// Wrapper that performs a blocking unary call
-template <class InputMessage, class OutputMessage>
-Status BlockingUnaryCall(Channel* channel, const RpcMethod& method,
-                         ClientContext* context, const InputMessage& request,
-                         OutputMessage* result) {
-  CompletionQueue cq;
-  Call call(channel->CreateCall(method, context, &cq));
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-            CallOpRecvInitialMetadata, CallOpRecvMessage<OutputMessage>,
-            CallOpClientSendClose, CallOpClientRecvStatus> ops;
-  Status status = ops.SendMessage(request);
-  if (!status.ok()) {
-    return status;
-  }
-  ops.SendInitialMetadata(context->send_initial_metadata_);
-  ops.RecvInitialMetadata(context);
-  ops.RecvMessage(result);
-  ops.ClientSendClose();
-  ops.ClientRecvStatus(context, &status);
-  call.PerformOps(&ops);
-  GPR_ASSERT((cq.Pluck(&ops) && ops.got_message) || !status.ok());
-  return status;
-}
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/client_unary_call.h>
 
 #endif  // GRPCXX_IMPL_CLIENT_UNARY_CALL_H
diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
new file mode 100644
index 0000000000000000000000000000000000000000..b0410485f8582d0fb5d8c3a4d3faf98f40ee2212
--- /dev/null
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -0,0 +1,462 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
+#define GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
+
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/impl/codegen/service_type.h>
+#include <grpc++/impl/codegen/server_context.h>
+#include <grpc++/impl/codegen/status.h>
+
+namespace grpc {
+
+class CompletionQueue;
+
+/// Common interface for all client side asynchronous streaming.
+class ClientAsyncStreamingInterface {
+ public:
+  virtual ~ClientAsyncStreamingInterface() {}
+
+  /// Request notification of the reading of the initial metadata. Completion
+  /// will be notified by \a tag on the associated completion queue.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  virtual void ReadInitialMetadata(void* tag) = 0;
+
+  /// Request notification completion.
+  ///
+  /// \param[out] status To be updated with the operation status.
+  /// \param[in] tag Tag identifying this request.
+  virtual void Finish(Status* status, void* tag) = 0;
+};
+
+/// An interface that yields a sequence of messages of type \a R.
+template <class R>
+class AsyncReaderInterface {
+ public:
+  virtual ~AsyncReaderInterface() {}
+
+  /// Read a message of type \a R into \a msg. Completion will be notified by \a
+  /// tag on the associated completion queue.
+  ///
+  /// \param[out] msg Where to eventually store the read message.
+  /// \param[in] tag The tag identifying the operation.
+  virtual void Read(R* msg, void* tag) = 0;
+};
+
+/// An interface that can be fed a sequence of messages of type \a W.
+template <class W>
+class AsyncWriterInterface {
+ public:
+  virtual ~AsyncWriterInterface() {}
+
+  /// Request the writing of \a msg with identifying tag \a tag.
+  ///
+  /// Only one write may be outstanding at any given time. This means that
+  /// after calling Write, one must wait to receive \a tag from the completion
+  /// queue BEFORE calling Write again.
+  ///
+  /// \param[in] msg The message to be written.
+  /// \param[in] tag The tag identifying the operation.
+  virtual void Write(const W& msg, void* tag) = 0;
+};
+
+template <class R>
+class ClientAsyncReaderInterface : public ClientAsyncStreamingInterface,
+                                   public AsyncReaderInterface<R> {};
+
+template <class R>
+class ClientAsyncReader GRPC_FINAL : public ClientAsyncReaderInterface<R> {
+ public:
+  /// Create a stream and write the first request out.
+  template <class W>
+  ClientAsyncReader(ChannelInterface* channel, CompletionQueue* cq,
+                    const RpcMethod& method, ClientContext* context,
+                    const W& request, void* tag)
+      : context_(context), call_(channel->CreateCall(method, context, cq)) {
+    init_ops_.set_output_tag(tag);
+    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(init_ops_.SendMessage(request).ok());
+    init_ops_.ClientSendClose();
+    call_.PerformOps(&init_ops_);
+  }
+
+  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.RecvInitialMetadata(context_);
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Read(R* msg, void* tag) GRPC_OVERRIDE {
+    read_ops_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      read_ops_.RecvInitialMetadata(context_);
+    }
+    read_ops_.RecvMessage(msg);
+    call_.PerformOps(&read_ops_);
+  }
+
+  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
+    finish_ops_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      finish_ops_.RecvInitialMetadata(context_);
+    }
+    finish_ops_.ClientRecvStatus(context_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  ClientContext* context_;
+  Call call_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose>
+      init_ops_;
+  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> read_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> finish_ops_;
+};
+
+/// Common interface for client side asynchronous writing.
+template <class W>
+class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
+                                   public AsyncWriterInterface<W> {
+ public:
+  /// Signal the client is done with the writes.
+  ///
+  /// \param[in] tag The tag identifying the operation.
+  virtual void WritesDone(void* tag) = 0;
+};
+
+template <class W>
+class ClientAsyncWriter GRPC_FINAL : public ClientAsyncWriterInterface<W> {
+ public:
+  template <class R>
+  ClientAsyncWriter(ChannelInterface* channel, CompletionQueue* cq,
+                    const RpcMethod& method, ClientContext* context,
+                    R* response, void* tag)
+      : context_(context), call_(channel->CreateCall(method, context, cq)) {
+    finish_ops_.RecvMessage(response);
+
+    init_ops_.set_output_tag(tag);
+    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
+    call_.PerformOps(&init_ops_);
+  }
+
+  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.RecvInitialMetadata(context_);
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
+    write_ops_.set_output_tag(tag);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
+    call_.PerformOps(&write_ops_);
+  }
+
+  void WritesDone(void* tag) GRPC_OVERRIDE {
+    writes_done_ops_.set_output_tag(tag);
+    writes_done_ops_.ClientSendClose();
+    call_.PerformOps(&writes_done_ops_);
+  }
+
+  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
+    finish_ops_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      finish_ops_.RecvInitialMetadata(context_);
+    }
+    finish_ops_.ClientRecvStatus(context_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  ClientContext* context_;
+  Call call_;
+  CallOpSet<CallOpSendInitialMetadata> init_ops_;
+  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
+  CallOpSet<CallOpSendMessage> write_ops_;
+  CallOpSet<CallOpClientSendClose> writes_done_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpGenericRecvMessage,
+            CallOpClientRecvStatus> finish_ops_;
+};
+
+/// Client-side interface for asynchronous bi-directional streaming.
+template <class W, class R>
+class ClientAsyncReaderWriterInterface : public ClientAsyncStreamingInterface,
+                                         public AsyncWriterInterface<W>,
+                                         public AsyncReaderInterface<R> {
+ public:
+  /// Signal the client is done with the writes.
+  ///
+  /// \param[in] tag The tag identifying the operation.
+  virtual void WritesDone(void* tag) = 0;
+};
+
+template <class W, class R>
+class ClientAsyncReaderWriter GRPC_FINAL
+    : public ClientAsyncReaderWriterInterface<W, R> {
+ public:
+  ClientAsyncReaderWriter(ChannelInterface* channel, CompletionQueue* cq,
+                          const RpcMethod& method, ClientContext* context,
+                          void* tag)
+      : context_(context), call_(channel->CreateCall(method, context, cq)) {
+    init_ops_.set_output_tag(tag);
+    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
+    call_.PerformOps(&init_ops_);
+  }
+
+  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.RecvInitialMetadata(context_);
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Read(R* msg, void* tag) GRPC_OVERRIDE {
+    read_ops_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      read_ops_.RecvInitialMetadata(context_);
+    }
+    read_ops_.RecvMessage(msg);
+    call_.PerformOps(&read_ops_);
+  }
+
+  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
+    write_ops_.set_output_tag(tag);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
+    call_.PerformOps(&write_ops_);
+  }
+
+  void WritesDone(void* tag) GRPC_OVERRIDE {
+    writes_done_ops_.set_output_tag(tag);
+    writes_done_ops_.ClientSendClose();
+    call_.PerformOps(&writes_done_ops_);
+  }
+
+  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
+    finish_ops_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      finish_ops_.RecvInitialMetadata(context_);
+    }
+    finish_ops_.ClientRecvStatus(context_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  ClientContext* context_;
+  Call call_;
+  CallOpSet<CallOpSendInitialMetadata> init_ops_;
+  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> read_ops_;
+  CallOpSet<CallOpSendMessage> write_ops_;
+  CallOpSet<CallOpClientSendClose> writes_done_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> finish_ops_;
+};
+
+template <class W, class R>
+class ServerAsyncReader GRPC_FINAL : public ServerAsyncStreamingInterface,
+                                     public AsyncReaderInterface<R> {
+ public:
+  explicit ServerAsyncReader(ServerContext* ctx)
+      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
+
+  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Read(R* msg, void* tag) GRPC_OVERRIDE {
+    read_ops_.set_output_tag(tag);
+    read_ops_.RecvMessage(msg);
+    call_.PerformOps(&read_ops_);
+  }
+
+  void Finish(const W& msg, const Status& status, void* tag) {
+    finish_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    // The response is dropped if the status is not OK.
+    if (status.ok()) {
+      finish_ops_.ServerSendStatus(ctx_->trailing_metadata_,
+                                   finish_ops_.SendMessage(msg));
+    } else {
+      finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    }
+    call_.PerformOps(&finish_ops_);
+  }
+
+  void FinishWithError(const Status& status, void* tag) {
+    GPR_ASSERT(!status.ok());
+    finish_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
+
+  Call call_;
+  ServerContext* ctx_;
+  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
+  CallOpSet<CallOpRecvMessage<R>> read_ops_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+            CallOpServerSendStatus> finish_ops_;
+};
+
+template <class W>
+class ServerAsyncWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
+                                     public AsyncWriterInterface<W> {
+ public:
+  explicit ServerAsyncWriter(ServerContext* ctx)
+      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
+
+  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
+    write_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
+    call_.PerformOps(&write_ops_);
+  }
+
+  void Finish(const Status& status, void* tag) {
+    finish_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
+
+  Call call_;
+  ServerContext* ctx_;
+  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> write_ops_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> finish_ops_;
+};
+
+/// Server-side interface for asynchronous bi-directional streaming.
+template <class W, class R>
+class ServerAsyncReaderWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
+                                           public AsyncWriterInterface<W>,
+                                           public AsyncReaderInterface<R> {
+ public:
+  explicit ServerAsyncReaderWriter(ServerContext* ctx)
+      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
+
+  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    meta_ops_.set_output_tag(tag);
+    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_.PerformOps(&meta_ops_);
+  }
+
+  void Read(R* msg, void* tag) GRPC_OVERRIDE {
+    read_ops_.set_output_tag(tag);
+    read_ops_.RecvMessage(msg);
+    call_.PerformOps(&read_ops_);
+  }
+
+  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
+    write_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
+    call_.PerformOps(&write_ops_);
+  }
+
+  void Finish(const Status& status, void* tag) {
+    finish_ops_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    call_.PerformOps(&finish_ops_);
+  }
+
+ private:
+  friend class ::grpc::Server;
+
+  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
+
+  Call call_;
+  ServerContext* ctx_;
+  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
+  CallOpSet<CallOpRecvMessage<R>> read_ops_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> write_ops_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> finish_ops_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
new file mode 100644
index 0000000000000000000000000000000000000000..481b20b5354d1b882164f9fcd9e40613be9239dd
--- /dev/null
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -0,0 +1,156 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
+#define GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
+
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/client_context.h>
+#include <grpc++/impl/codegen/server_context.h>
+#include <grpc++/impl/codegen/service_type.h>
+#include <grpc++/impl/codegen/status.h>
+#include <grpc/impl/codegen/log.h>
+
+namespace grpc {
+
+class CompletionQueue;
+
+template <class R>
+class ClientAsyncResponseReaderInterface {
+ public:
+  virtual ~ClientAsyncResponseReaderInterface() {}
+  virtual void ReadInitialMetadata(void* tag) = 0;
+  virtual void Finish(R* msg, Status* status, void* tag) = 0;
+};
+
+template <class R>
+class ClientAsyncResponseReader GRPC_FINAL
+    : public ClientAsyncResponseReaderInterface<R> {
+ public:
+  template <class W>
+  ClientAsyncResponseReader(ChannelInterface* channel, CompletionQueue* cq,
+                            const RpcMethod& method, ClientContext* context,
+                            const W& request)
+      : context_(context), call_(channel->CreateCall(method, context, cq)) {
+    init_buf_.SendInitialMetadata(context->send_initial_metadata_);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(init_buf_.SendMessage(request).ok());
+    init_buf_.ClientSendClose();
+    call_.PerformOps(&init_buf_);
+  }
+
+  void ReadInitialMetadata(void* tag) {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    meta_buf_.set_output_tag(tag);
+    meta_buf_.RecvInitialMetadata(context_);
+    call_.PerformOps(&meta_buf_);
+  }
+
+  void Finish(R* msg, Status* status, void* tag) {
+    finish_buf_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      finish_buf_.RecvInitialMetadata(context_);
+    }
+    finish_buf_.RecvMessage(msg);
+    finish_buf_.ClientRecvStatus(context_, status);
+    call_.PerformOps(&finish_buf_);
+  }
+
+ private:
+  ClientContext* context_;
+  Call call_;
+  SneakyCallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+                  CallOpClientSendClose> init_buf_;
+  CallOpSet<CallOpRecvInitialMetadata> meta_buf_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>,
+            CallOpClientRecvStatus> finish_buf_;
+};
+
+template <class W>
+class ServerAsyncResponseWriter GRPC_FINAL
+    : public ServerAsyncStreamingInterface {
+ public:
+  explicit ServerAsyncResponseWriter(ServerContext* ctx)
+      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
+
+  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    meta_buf_.set_output_tag(tag);
+    meta_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_.PerformOps(&meta_buf_);
+  }
+
+  void Finish(const W& msg, const Status& status, void* tag) {
+    finish_buf_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    // The response is dropped if the status is not OK.
+    if (status.ok()) {
+      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_,
+                                   finish_buf_.SendMessage(msg));
+    } else {
+      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    }
+    call_.PerformOps(&finish_buf_);
+  }
+
+  void FinishWithError(const Status& status, void* tag) {
+    GPR_ASSERT(!status.ok());
+    finish_buf_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    call_.PerformOps(&finish_buf_);
+  }
+
+ private:
+  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
+
+  Call call_;
+  ServerContext* ctx_;
+  CallOpSet<CallOpSendInitialMetadata> meta_buf_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+            CallOpServerSendStatus> finish_buf_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e06768ac40696f056c0192378ce6cfac72108e2
--- /dev/null
+++ b/include/grpc++/impl/codegen/call.h
@@ -0,0 +1,578 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CALL_H
+#define GRPCXX_IMPL_CODEGEN_CALL_H
+
+#include <functional>
+#include <memory>
+#include <map>
+#include <cstring>
+
+#include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc++/impl/codegen/client_context.h>
+#include <grpc++/impl/codegen/call_hook.h>
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <grpc++/impl/codegen/serialization_traits.h>
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/status.h>
+
+struct grpc_byte_buffer;
+
+namespace grpc {
+
+class ByteBuffer;
+class Call;
+class CallHook;
+class CompletionQueue;
+
+void FillMetadataMap(
+    grpc_metadata_array* arr,
+    std::multimap<grpc::string_ref, grpc::string_ref>* metadata);
+grpc_metadata* FillMetadataArray(
+    const std::multimap<grpc::string, grpc::string>& metadata);
+
+/// Per-message write options.
+class WriteOptions {
+ public:
+  WriteOptions() : flags_(0) {}
+  WriteOptions(const WriteOptions& other) : flags_(other.flags_) {}
+
+  /// Clear all flags.
+  inline void Clear() { flags_ = 0; }
+
+  /// Returns raw flags bitset.
+  inline uint32_t flags() const { return flags_; }
+
+  /// Sets flag for the disabling of compression for the next message write.
+  ///
+  /// \sa GRPC_WRITE_NO_COMPRESS
+  inline WriteOptions& set_no_compression() {
+    SetBit(GRPC_WRITE_NO_COMPRESS);
+    return *this;
+  }
+
+  /// Clears flag for the disabling of compression for the next message write.
+  ///
+  /// \sa GRPC_WRITE_NO_COMPRESS
+  inline WriteOptions& clear_no_compression() {
+    ClearBit(GRPC_WRITE_NO_COMPRESS);
+    return *this;
+  }
+
+  /// Get value for the flag indicating whether compression for the next
+  /// message write is forcefully disabled.
+  ///
+  /// \sa GRPC_WRITE_NO_COMPRESS
+  inline bool get_no_compression() const {
+    return GetBit(GRPC_WRITE_NO_COMPRESS);
+  }
+
+  /// Sets flag indicating that the write may be buffered and need not go out on
+  /// the wire immediately.
+  ///
+  /// \sa GRPC_WRITE_BUFFER_HINT
+  inline WriteOptions& set_buffer_hint() {
+    SetBit(GRPC_WRITE_BUFFER_HINT);
+    return *this;
+  }
+
+  /// Clears flag indicating that the write may be buffered and need not go out
+  /// on the wire immediately.
+  ///
+  /// \sa GRPC_WRITE_BUFFER_HINT
+  inline WriteOptions& clear_buffer_hint() {
+    ClearBit(GRPC_WRITE_BUFFER_HINT);
+    return *this;
+  }
+
+  /// Get value for the flag indicating that the write may be buffered and need
+  /// not go out on the wire immediately.
+  ///
+  /// \sa GRPC_WRITE_BUFFER_HINT
+  inline bool get_buffer_hint() const { return GetBit(GRPC_WRITE_BUFFER_HINT); }
+
+  WriteOptions& operator=(const WriteOptions& rhs) {
+    flags_ = rhs.flags_;
+    return *this;
+  }
+
+ private:
+  void SetBit(const uint32_t mask) { flags_ |= mask; }
+
+  void ClearBit(const uint32_t mask) { flags_ &= ~mask; }
+
+  bool GetBit(const uint32_t mask) const { return (flags_ & mask) != 0; }
+
+  uint32_t flags_;
+};
+
+/// Default argument for CallOpSet. I is unused by the class, but can be
+/// used for generating multiple names for the same thing.
+template <int I>
+class CallNoOp {
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {}
+  void FinishOp(bool* status, int max_message_size) {}
+};
+
+class CallOpSendInitialMetadata {
+ public:
+  CallOpSendInitialMetadata() : send_(false) {}
+
+  void SendInitialMetadata(
+      const std::multimap<grpc::string, grpc::string>& metadata) {
+    send_ = true;
+    initial_metadata_count_ = metadata.size();
+    initial_metadata_ = FillMetadataArray(metadata);
+  }
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (!send_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->flags = 0;
+    op->reserved = NULL;
+    op->data.send_initial_metadata.count = initial_metadata_count_;
+    op->data.send_initial_metadata.metadata = initial_metadata_;
+  }
+  void FinishOp(bool* status, int max_message_size) {
+    if (!send_) return;
+    gpr_free(initial_metadata_);
+    send_ = false;
+  }
+
+  bool send_;
+  size_t initial_metadata_count_;
+  grpc_metadata* initial_metadata_;
+};
+
+class CallOpSendMessage {
+ public:
+  CallOpSendMessage() : send_buf_(nullptr), own_buf_(false) {}
+
+  /// Send \a message using \a options for the write. The \a options are cleared
+  /// after use.
+  template <class M>
+  Status SendMessage(const M& message,
+                     const WriteOptions& options) GRPC_MUST_USE_RESULT;
+
+  template <class M>
+  Status SendMessage(const M& message) GRPC_MUST_USE_RESULT;
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (send_buf_ == nullptr) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_MESSAGE;
+    op->flags = write_options_.flags();
+    op->reserved = NULL;
+    op->data.send_message = send_buf_;
+    // Flags are per-message: clear them after use.
+    write_options_.Clear();
+  }
+  void FinishOp(bool* status, int max_message_size) {
+    if (own_buf_) grpc_byte_buffer_destroy(send_buf_);
+    send_buf_ = nullptr;
+  }
+
+ private:
+  grpc_byte_buffer* send_buf_;
+  WriteOptions write_options_;
+  bool own_buf_;
+};
+
+template <class M>
+Status CallOpSendMessage::SendMessage(const M& message,
+                                      const WriteOptions& options) {
+  write_options_ = options;
+  return SerializationTraits<M>::Serialize(message, &send_buf_, &own_buf_);
+}
+
+template <class M>
+Status CallOpSendMessage::SendMessage(const M& message) {
+  return SendMessage(message, WriteOptions());
+}
+
+template <class R>
+class CallOpRecvMessage {
+ public:
+  CallOpRecvMessage() : got_message(false), message_(nullptr) {}
+
+  void RecvMessage(R* message) { message_ = message; }
+
+  bool got_message;
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (message_ == nullptr) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->flags = 0;
+    op->reserved = NULL;
+    op->data.recv_message = &recv_buf_;
+  }
+
+  void FinishOp(bool* status, int max_message_size) {
+    if (message_ == nullptr) return;
+    if (recv_buf_) {
+      if (*status) {
+        got_message = true;
+        *status = SerializationTraits<R>::Deserialize(recv_buf_, message_,
+                                                      max_message_size).ok();
+      } else {
+        got_message = false;
+        grpc_byte_buffer_destroy(recv_buf_);
+      }
+    } else {
+      got_message = false;
+      *status = false;
+    }
+    message_ = nullptr;
+  }
+
+ private:
+  R* message_;
+  grpc_byte_buffer* recv_buf_;
+};
+
+namespace CallOpGenericRecvMessageHelper {
+class DeserializeFunc {
+ public:
+  virtual Status Deserialize(grpc_byte_buffer* buf, int max_message_size) = 0;
+};
+
+template <class R>
+class DeserializeFuncType GRPC_FINAL : public DeserializeFunc {
+ public:
+  DeserializeFuncType(R* message) : message_(message) {}
+  Status Deserialize(grpc_byte_buffer* buf,
+                     int max_message_size) GRPC_OVERRIDE {
+    return SerializationTraits<R>::Deserialize(buf, message_, max_message_size);
+  }
+
+ private:
+  R* message_;  // Not a managed pointer because management is external to this
+};
+}  // namespace CallOpGenericRecvMessageHelper
+
+class CallOpGenericRecvMessage {
+ public:
+  CallOpGenericRecvMessage() : got_message(false) {}
+
+  template <class R>
+  void RecvMessage(R* message) {
+    deserialize_.reset(
+        new CallOpGenericRecvMessageHelper::DeserializeFuncType<R>(message));
+  }
+
+  bool got_message;
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (!deserialize_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->flags = 0;
+    op->reserved = NULL;
+    op->data.recv_message = &recv_buf_;
+  }
+
+  void FinishOp(bool* status, int max_message_size) {
+    if (!deserialize_) return;
+    if (recv_buf_) {
+      if (*status) {
+        got_message = true;
+        *status = deserialize_->Deserialize(recv_buf_, max_message_size).ok();
+      } else {
+        got_message = false;
+        grpc_byte_buffer_destroy(recv_buf_);
+      }
+    } else {
+      got_message = false;
+      *status = false;
+    }
+    deserialize_.reset();
+  }
+
+ private:
+  std::unique_ptr<CallOpGenericRecvMessageHelper::DeserializeFunc> deserialize_;
+  grpc_byte_buffer* recv_buf_;
+};
+
+class CallOpClientSendClose {
+ public:
+  CallOpClientSendClose() : send_(false) {}
+
+  void ClientSendClose() { send_ = true; }
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (!send_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+    op->flags = 0;
+    op->reserved = NULL;
+  }
+  void FinishOp(bool* status, int max_message_size) { send_ = false; }
+
+ private:
+  bool send_;
+};
+
+class CallOpServerSendStatus {
+ public:
+  CallOpServerSendStatus() : send_status_available_(false) {}
+
+  void ServerSendStatus(
+      const std::multimap<grpc::string, grpc::string>& trailing_metadata,
+      const Status& status) {
+    trailing_metadata_count_ = trailing_metadata.size();
+    trailing_metadata_ = FillMetadataArray(trailing_metadata);
+    send_status_available_ = true;
+    send_status_code_ = static_cast<grpc_status_code>(status.error_code());
+    send_status_details_ = status.error_message();
+  }
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (!send_status_available_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+    op->data.send_status_from_server.trailing_metadata_count =
+        trailing_metadata_count_;
+    op->data.send_status_from_server.trailing_metadata = trailing_metadata_;
+    op->data.send_status_from_server.status = send_status_code_;
+    op->data.send_status_from_server.status_details =
+        send_status_details_.empty() ? nullptr : send_status_details_.c_str();
+    op->flags = 0;
+    op->reserved = NULL;
+  }
+
+  void FinishOp(bool* status, int max_message_size) {
+    if (!send_status_available_) return;
+    gpr_free(trailing_metadata_);
+    send_status_available_ = false;
+  }
+
+ private:
+  bool send_status_available_;
+  grpc_status_code send_status_code_;
+  grpc::string send_status_details_;
+  size_t trailing_metadata_count_;
+  grpc_metadata* trailing_metadata_;
+};
+
+class CallOpRecvInitialMetadata {
+ public:
+  CallOpRecvInitialMetadata() : recv_initial_metadata_(nullptr) {}
+
+  void RecvInitialMetadata(ClientContext* context) {
+    context->initial_metadata_received_ = true;
+    recv_initial_metadata_ = &context->recv_initial_metadata_;
+  }
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (!recv_initial_metadata_) return;
+    memset(&recv_initial_metadata_arr_, 0, sizeof(recv_initial_metadata_arr_));
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_INITIAL_METADATA;
+    op->data.recv_initial_metadata = &recv_initial_metadata_arr_;
+    op->flags = 0;
+    op->reserved = NULL;
+  }
+  void FinishOp(bool* status, int max_message_size) {
+    if (recv_initial_metadata_ == nullptr) return;
+    FillMetadataMap(&recv_initial_metadata_arr_, recv_initial_metadata_);
+    recv_initial_metadata_ = nullptr;
+  }
+
+ private:
+  std::multimap<grpc::string_ref, grpc::string_ref>* recv_initial_metadata_;
+  grpc_metadata_array recv_initial_metadata_arr_;
+};
+
+class CallOpClientRecvStatus {
+ public:
+  CallOpClientRecvStatus() : recv_status_(nullptr) {}
+
+  void ClientRecvStatus(ClientContext* context, Status* status) {
+    recv_trailing_metadata_ = &context->trailing_metadata_;
+    recv_status_ = status;
+  }
+
+ protected:
+  void AddOp(grpc_op* ops, size_t* nops) {
+    if (recv_status_ == nullptr) return;
+    memset(&recv_trailing_metadata_arr_, 0,
+           sizeof(recv_trailing_metadata_arr_));
+    status_details_ = nullptr;
+    status_details_capacity_ = 0;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata =
+        &recv_trailing_metadata_arr_;
+    op->data.recv_status_on_client.status = &status_code_;
+    op->data.recv_status_on_client.status_details = &status_details_;
+    op->data.recv_status_on_client.status_details_capacity =
+        &status_details_capacity_;
+    op->flags = 0;
+    op->reserved = NULL;
+  }
+
+  void FinishOp(bool* status, int max_message_size) {
+    if (recv_status_ == nullptr) return;
+    FillMetadataMap(&recv_trailing_metadata_arr_, recv_trailing_metadata_);
+    *recv_status_ = Status(
+        static_cast<StatusCode>(status_code_),
+        status_details_ ? grpc::string(status_details_) : grpc::string());
+    gpr_free(status_details_);
+    recv_status_ = nullptr;
+  }
+
+ private:
+  std::multimap<grpc::string_ref, grpc::string_ref>* recv_trailing_metadata_;
+  Status* recv_status_;
+  grpc_metadata_array recv_trailing_metadata_arr_;
+  grpc_status_code status_code_;
+  char* status_details_;
+  size_t status_details_capacity_;
+};
+
+/// An abstract collection of call ops, used to generate the
+/// grpc_call_op structure to pass down to the lower layers,
+/// and as it is-a CompletionQueueTag, also massages the final
+/// completion into the correct form for consumption in the C++
+/// API.
+class CallOpSetInterface : public CompletionQueueTag {
+ public:
+  CallOpSetInterface() : max_message_size_(0) {}
+  /// Fills in grpc_op, starting from ops[*nops] and moving
+  /// upwards.
+  virtual void FillOps(grpc_op* ops, size_t* nops) = 0;
+
+  void set_max_message_size(int max_message_size) {
+    max_message_size_ = max_message_size;
+  }
+
+ protected:
+  int max_message_size_;
+};
+
+/// Primary implementaiton of CallOpSetInterface.
+/// Since we cannot use variadic templates, we declare slots up to
+/// the maximum count of ops we'll need in a set. We leverage the
+/// empty base class optimization to slim this class (especially
+/// when there are many unused slots used). To avoid duplicate base classes,
+/// the template parmeter for CallNoOp is varied by argument position.
+template <class Op1 = CallNoOp<1>, class Op2 = CallNoOp<2>,
+          class Op3 = CallNoOp<3>, class Op4 = CallNoOp<4>,
+          class Op5 = CallNoOp<5>, class Op6 = CallNoOp<6>>
+class CallOpSet : public CallOpSetInterface,
+                  public Op1,
+                  public Op2,
+                  public Op3,
+                  public Op4,
+                  public Op5,
+                  public Op6 {
+ public:
+  CallOpSet() : return_tag_(this) {}
+  void FillOps(grpc_op* ops, size_t* nops) GRPC_OVERRIDE {
+    this->Op1::AddOp(ops, nops);
+    this->Op2::AddOp(ops, nops);
+    this->Op3::AddOp(ops, nops);
+    this->Op4::AddOp(ops, nops);
+    this->Op5::AddOp(ops, nops);
+    this->Op6::AddOp(ops, nops);
+  }
+
+  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+    this->Op1::FinishOp(status, max_message_size_);
+    this->Op2::FinishOp(status, max_message_size_);
+    this->Op3::FinishOp(status, max_message_size_);
+    this->Op4::FinishOp(status, max_message_size_);
+    this->Op5::FinishOp(status, max_message_size_);
+    this->Op6::FinishOp(status, max_message_size_);
+    *tag = return_tag_;
+    return true;
+  }
+
+  void set_output_tag(void* return_tag) { return_tag_ = return_tag; }
+
+ private:
+  void* return_tag_;
+};
+
+/// A CallOpSet that does not post completions to the completion queue.
+///
+/// Allows hiding some completions that the C core must generate from
+/// C++ users.
+template <class Op1 = CallNoOp<1>, class Op2 = CallNoOp<2>,
+          class Op3 = CallNoOp<3>, class Op4 = CallNoOp<4>,
+          class Op5 = CallNoOp<5>, class Op6 = CallNoOp<6>>
+class SneakyCallOpSet : public CallOpSet<Op1, Op2, Op3, Op4, Op5, Op6> {
+ public:
+  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+    typedef CallOpSet<Op1, Op2, Op3, Op4, Op5, Op6> Base;
+    return Base::FinalizeResult(tag, status) && false;
+  }
+};
+
+// Straightforward wrapping of the C call object
+class Call GRPC_FINAL {
+ public:
+  /* call is owned by the caller */
+  Call(grpc_call* call, CallHook* call_hook_, CompletionQueue* cq);
+  Call(grpc_call* call, CallHook* call_hook_, CompletionQueue* cq,
+       int max_message_size);
+
+  void PerformOps(CallOpSetInterface* ops);
+
+  grpc_call* call() { return call_; }
+  CompletionQueue* cq() { return cq_; }
+
+  int max_message_size() { return max_message_size_; }
+
+ private:
+  CallHook* call_hook_;
+  CompletionQueue* cq_;
+  grpc_call* call_;
+  int max_message_size_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CALL_H
diff --git a/include/grpc++/impl/codegen/call_hook.h b/include/grpc++/impl/codegen/call_hook.h
new file mode 100644
index 0000000000000000000000000000000000000000..0b6027293a37a30572c54f9b5866ec62cbe6c362
--- /dev/null
+++ b/include/grpc++/impl/codegen/call_hook.h
@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CALL_HOOK_H
+#define GRPCXX_IMPL_CODEGEN_CALL_HOOK_H
+
+namespace grpc {
+
+class CallOpSetInterface;
+class Call;
+
+/// Channel and Server implement this to allow them to hook performing ops
+class CallHook {
+ public:
+  virtual ~CallHook() {}
+  virtual void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) = 0;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CALL_HOOK_H
diff --git a/include/grpc++/impl/codegen/channel_interface.h b/include/grpc++/impl/codegen/channel_interface.h
new file mode 100644
index 0000000000000000000000000000000000000000..6fcd5c315ca9c19e406440059d086a582c1d6afb
--- /dev/null
+++ b/include/grpc++/impl/codegen/channel_interface.h
@@ -0,0 +1,123 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CHANNEL_INTERFACE_H
+#define GRPCXX_IMPL_CODEGEN_CHANNEL_INTERFACE_H
+
+#include <grpc++/impl/codegen/status.h>
+#include <grpc++/impl/codegen/time.h>
+#include <grpc/impl/codegen/connectivity_state.h>
+
+namespace grpc {
+class Call;
+class ClientContext;
+class RpcMethod;
+class CallOpSetInterface;
+class CompletionQueue;
+
+template <class R>
+class ClientReader;
+template <class W>
+class ClientWriter;
+template <class W, class R>
+class ClientReaderWriter;
+template <class R>
+class ClientAsyncReader;
+template <class W>
+class ClientAsyncWriter;
+template <class W, class R>
+class ClientAsyncReaderWriter;
+template <class R>
+class ClientAsyncResponseReader;
+
+/// Codegen interface for \a grpc::Channel.
+class ChannelInterface {
+ public:
+  virtual ~ChannelInterface() {}
+  /// Get the current channel state. If the channel is in IDLE and
+  /// \a try_to_connect is set to true, try to connect.
+  virtual grpc_connectivity_state GetState(bool try_to_connect) = 0;
+
+  /// Return the \a tag on \a cq when the channel state is changed or \a
+  /// deadline expires. \a GetState needs to called to get the current state.
+  template <typename T>
+  void NotifyOnStateChange(grpc_connectivity_state last_observed, T deadline,
+                           CompletionQueue* cq, void* tag) {
+    TimePoint<T> deadline_tp(deadline);
+    NotifyOnStateChangeImpl(last_observed, deadline_tp.raw_time(), cq, tag);
+  }
+
+  /// Blocking wait for channel state change or \a deadline expiration.
+  /// \a GetState needs to called to get the current state.
+  template <typename T>
+  bool WaitForStateChange(grpc_connectivity_state last_observed, T deadline) {
+    TimePoint<T> deadline_tp(deadline);
+    return WaitForStateChangeImpl(last_observed, deadline_tp.raw_time());
+  }
+
+ private:
+  template <class R>
+  friend class ::grpc::ClientReader;
+  template <class W>
+  friend class ::grpc::ClientWriter;
+  template <class W, class R>
+  friend class ::grpc::ClientReaderWriter;
+  template <class R>
+  friend class ::grpc::ClientAsyncReader;
+  template <class W>
+  friend class ::grpc::ClientAsyncWriter;
+  template <class W, class R>
+  friend class ::grpc::ClientAsyncReaderWriter;
+  template <class R>
+  friend class ::grpc::ClientAsyncResponseReader;
+  template <class InputMessage, class OutputMessage>
+  friend Status BlockingUnaryCall(ChannelInterface* channel,
+                                  const RpcMethod& method,
+                                  ClientContext* context,
+                                  const InputMessage& request,
+                                  OutputMessage* result);
+  friend class ::grpc::RpcMethod;
+  virtual Call CreateCall(const RpcMethod& method, ClientContext* context,
+                          CompletionQueue* cq) = 0;
+  virtual void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) = 0;
+  virtual void* RegisterMethod(const char* method) = 0;
+  virtual void NotifyOnStateChangeImpl(grpc_connectivity_state last_observed,
+                                       gpr_timespec deadline,
+                                       CompletionQueue* cq, void* tag) = 0;
+  virtual bool WaitForStateChangeImpl(grpc_connectivity_state last_observed,
+                                      gpr_timespec deadline) = 0;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CHANNEL_INTERFACE_H
diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
new file mode 100644
index 0000000000000000000000000000000000000000..db2afe930c6a1679a2aec8c07f136135c61a7349
--- /dev/null
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -0,0 +1,354 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/// A ClientContext allows the person implementing a service client to:
+///
+/// - Add custom metadata key-value pairs that will propagated to the server
+/// side.
+/// - Control call settings such as compression and authentication.
+/// - Initial and trailing metadata coming from the server.
+/// - Get performance metrics (ie, census).
+///
+/// Context settings are only relevant to the call they are invoked with, that
+/// is to say, they aren't sticky. Some of these settings, such as the
+/// compression options, can be made persistant at channel construction time
+/// (see \a grpc::CreateCustomChannel).
+///
+/// \warning ClientContext instances should \em not be reused across rpcs.
+
+#ifndef GRPCXX_IMPL_CODEGEN_CLIENT_CONTEXT_H
+#define GRPCXX_IMPL_CODEGEN_CLIENT_CONTEXT_H
+
+#include <map>
+#include <memory>
+#include <string>
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/security/auth_context.h>
+#include <grpc++/impl/codegen/status.h>
+#include <grpc++/impl/codegen/string_ref.h>
+#include <grpc++/impl/codegen/sync.h>
+#include <grpc++/impl/codegen/time.h>
+#include <grpc/impl/codegen/compression_types.h>
+#include <grpc/impl/codegen/log.h>
+#include <grpc/impl/codegen/propagation_bits.h>
+#include <grpc/impl/codegen/time.h>
+
+struct census_context;
+struct grpc_call;
+
+namespace grpc {
+
+class Channel;
+class ChannelInterface;
+class CompletionQueue;
+class CallCredentials;
+class RpcMethod;
+template <class R>
+class ClientReader;
+template <class W>
+class ClientWriter;
+template <class W, class R>
+class ClientReaderWriter;
+template <class R>
+class ClientAsyncReader;
+template <class W>
+class ClientAsyncWriter;
+template <class W, class R>
+class ClientAsyncReaderWriter;
+template <class R>
+class ClientAsyncResponseReader;
+class ServerContext;
+
+/// Options for \a ClientContext::FromServerContext specifying which traits from
+/// the \a ServerContext to propagate (copy) from it into a new \a
+/// ClientContext.
+///
+/// \see ClientContext::FromServerContext
+class PropagationOptions {
+ public:
+  PropagationOptions() : propagate_(GRPC_PROPAGATE_DEFAULTS) {}
+
+  PropagationOptions& enable_deadline_propagation() {
+    propagate_ |= GRPC_PROPAGATE_DEADLINE;
+    return *this;
+  }
+
+  PropagationOptions& disable_deadline_propagation() {
+    propagate_ &= ~GRPC_PROPAGATE_DEADLINE;
+    return *this;
+  }
+
+  PropagationOptions& enable_census_stats_propagation() {
+    propagate_ |= GRPC_PROPAGATE_CENSUS_STATS_CONTEXT;
+    return *this;
+  }
+
+  PropagationOptions& disable_census_stats_propagation() {
+    propagate_ &= ~GRPC_PROPAGATE_CENSUS_STATS_CONTEXT;
+    return *this;
+  }
+
+  PropagationOptions& enable_census_tracing_propagation() {
+    propagate_ |= GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT;
+    return *this;
+  }
+
+  PropagationOptions& disable_census_tracing_propagation() {
+    propagate_ &= ~GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT;
+    return *this;
+  }
+
+  PropagationOptions& enable_cancellation_propagation() {
+    propagate_ |= GRPC_PROPAGATE_CANCELLATION;
+    return *this;
+  }
+
+  PropagationOptions& disable_cancellation_propagation() {
+    propagate_ &= ~GRPC_PROPAGATE_CANCELLATION;
+    return *this;
+  }
+
+  uint32_t c_bitmask() const { return propagate_; }
+
+ private:
+  uint32_t propagate_;
+};
+
+namespace testing {
+class InteropClientContextInspector;
+}  // namespace testing
+
+class ClientContext {
+ public:
+  ClientContext();
+  ~ClientContext();
+
+  /// Create a new \a ClientContext as a child of an incoming server call,
+  /// according to \a options (\see PropagationOptions).
+  ///
+  /// \param server_context The source server context to use as the basis for
+  /// constructing the client context.
+  /// \param options The options controlling what to copy from the \a
+  /// server_context.
+  ///
+  /// \return A newly constructed \a ClientContext instance based on \a
+  /// server_context, with traits propagated (copied) according to \a options.
+  static std::unique_ptr<ClientContext> FromServerContext(
+      const ServerContext& server_context,
+      PropagationOptions options = PropagationOptions());
+
+  /// Add the (\a meta_key, \a meta_value) pair to the metadata associated with
+  /// a client call. These are made available at the server side by the \a
+  /// grpc::ServerContext::client_metadata() method.
+  ///
+  /// \warning This method should only be called before invoking the rpc.
+  ///
+  /// \param meta_key The metadata key. If \a meta_value is binary data, it must
+  /// end in "-bin".
+  /// \param meta_value The metadata value. If its value is binary, it must be
+  /// base64-encoding (see https://tools.ietf.org/html/rfc4648#section-4) and \a
+  /// meta_key must end in "-bin".
+  void AddMetadata(const grpc::string& meta_key,
+                   const grpc::string& meta_value);
+
+  /// Return a collection of initial metadata key-value pairs. Note that keys
+  /// may happen more than once (ie, a \a std::multimap is returned).
+  ///
+  /// \warning This method should only be called after initial metadata has been
+  /// received. For streaming calls, see \a
+  /// ClientReaderInterface::WaitForInitialMetadata().
+  ///
+  /// \return A multimap of initial metadata key-value pairs from the server.
+  const std::multimap<grpc::string_ref, grpc::string_ref>&
+  GetServerInitialMetadata() {
+    GPR_ASSERT(initial_metadata_received_);
+    return recv_initial_metadata_;
+  }
+
+  /// Return a collection of trailing metadata key-value pairs. Note that keys
+  /// may happen more than once (ie, a \a std::multimap is returned).
+  ///
+  /// \warning This method is only callable once the stream has finished.
+  ///
+  /// \return A multimap of metadata trailing key-value pairs from the server.
+  const std::multimap<grpc::string_ref, grpc::string_ref>&
+  GetServerTrailingMetadata() {
+    // TODO(yangg) check finished
+    return trailing_metadata_;
+  }
+
+  /// Set the deadline for the client call.
+  ///
+  /// \warning This method should only be called before invoking the rpc.
+  ///
+  /// \param deadline the deadline for the client call. Units are determined by
+  /// the type used.
+  template <typename T>
+  void set_deadline(const T& deadline) {
+    TimePoint<T> deadline_tp(deadline);
+    deadline_ = deadline_tp.raw_time();
+  }
+
+#ifndef GRPC_CXX0X_NO_CHRONO
+  /// Return the deadline for the client call.
+  std::chrono::system_clock::time_point deadline() {
+    return Timespec2Timepoint(deadline_);
+  }
+#endif  // !GRPC_CXX0X_NO_CHRONO
+
+  /// Return a \a gpr_timespec representation of the client call's deadline.
+  gpr_timespec raw_deadline() { return deadline_; }
+
+  /// Set the per call authority header (see
+  /// https://tools.ietf.org/html/rfc7540#section-8.1.2.3).
+  void set_authority(const grpc::string& authority) { authority_ = authority; }
+
+  /// Return the authentication context for this client call.
+  ///
+  /// \see grpc::AuthContext.
+  std::shared_ptr<const AuthContext> auth_context() const;
+
+  /// Set credentials for the client call.
+  ///
+  /// A credentials object encapsulates all the state needed by a client to
+  /// authenticate with a server and make various assertions, e.g., about the
+  /// client’s identity, role, or whether it is authorized to make a particular
+  /// call.
+  ///
+  /// \see  http://www.grpc.io/docs/guides/auth.html
+  void set_credentials(const std::shared_ptr<CallCredentials>& creds) {
+    creds_ = creds;
+  }
+
+  /// Return the compression algorithm to be used by the client call.
+  grpc_compression_algorithm compression_algorithm() const {
+    return compression_algorithm_;
+  }
+
+  /// Set \a algorithm to be the compression algorithm used for the client call.
+  ///
+  /// \param algorith The compression algorithm used for the client call.
+  void set_compression_algorithm(grpc_compression_algorithm algorithm);
+
+  /// Return the peer uri in a string.
+  ///
+  /// \warning This value is never authenticated or subject to any security
+  /// related code. It must not be used for any authentication related
+  /// functionality. Instead, use auth_context.
+  ///
+  /// \return The call's peer URI.
+  grpc::string peer() const;
+
+  /// Get and set census context.
+  void set_census_context(struct census_context* ccp) { census_context_ = ccp; }
+  struct census_context* census_context() const {
+    return census_context_;
+  }
+
+  /// Send a best-effort out-of-band cancel. The call could be in any stage.
+  /// e.g. if it is already finished, it may still return success.
+  ///
+  /// There is no guarantee the call will be cancelled.
+  void TryCancel();
+
+  /// Global Callbacks
+  ///
+  /// Can be set exactly once per application to install hooks whenever
+  /// a client context is constructed and destructed.
+  class GlobalCallbacks {
+   public:
+    virtual ~GlobalCallbacks() {}
+    virtual void DefaultConstructor(ClientContext* context) = 0;
+    virtual void Destructor(ClientContext* context) = 0;
+  };
+  static void SetGlobalCallbacks(GlobalCallbacks* callbacks);
+
+ private:
+  // Disallow copy and assign.
+  ClientContext(const ClientContext&);
+  ClientContext& operator=(const ClientContext&);
+
+  friend class ::grpc::testing::InteropClientContextInspector;
+  friend class CallOpClientRecvStatus;
+  friend class CallOpRecvInitialMetadata;
+  friend class Channel;
+  template <class R>
+  friend class ::grpc::ClientReader;
+  template <class W>
+  friend class ::grpc::ClientWriter;
+  template <class W, class R>
+  friend class ::grpc::ClientReaderWriter;
+  template <class R>
+  friend class ::grpc::ClientAsyncReader;
+  template <class W>
+  friend class ::grpc::ClientAsyncWriter;
+  template <class W, class R>
+  friend class ::grpc::ClientAsyncReaderWriter;
+  template <class R>
+  friend class ::grpc::ClientAsyncResponseReader;
+  template <class InputMessage, class OutputMessage>
+  friend Status BlockingUnaryCall(ChannelInterface* channel,
+                                  const RpcMethod& method,
+                                  ClientContext* context,
+                                  const InputMessage& request,
+                                  OutputMessage* result);
+
+  grpc_call* call() { return call_; }
+  void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
+
+  grpc::string authority() { return authority_; }
+
+  bool initial_metadata_received_;
+  std::shared_ptr<Channel> channel_;
+  grpc::mutex mu_;
+  grpc_call* call_;
+  bool call_canceled_;
+  gpr_timespec deadline_;
+  grpc::string authority_;
+  std::shared_ptr<CallCredentials> creds_;
+  mutable std::shared_ptr<const AuthContext> auth_context_;
+  struct census_context* census_context_;
+  std::multimap<grpc::string, grpc::string> send_initial_metadata_;
+  std::multimap<grpc::string_ref, grpc::string_ref> recv_initial_metadata_;
+  std::multimap<grpc::string_ref, grpc::string_ref> trailing_metadata_;
+
+  grpc_call* propagate_from_call_;
+  PropagationOptions propagation_options_;
+
+  grpc_compression_algorithm compression_algorithm_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CLIENT_CONTEXT_H
diff --git a/include/grpc++/impl/codegen/client_unary_call.h b/include/grpc++/impl/codegen/client_unary_call.h
new file mode 100644
index 0000000000000000000000000000000000000000..0134dec800ccfaa4d204b7c1a2adb7b99edcbeec
--- /dev/null
+++ b/include/grpc++/impl/codegen/client_unary_call.h
@@ -0,0 +1,75 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CLIENT_UNARY_CALL_H
+#define GRPCXX_IMPL_CODEGEN_CLIENT_UNARY_CALL_H
+
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/status.h>
+
+namespace grpc {
+
+class Channel;
+class ClientContext;
+class CompletionQueue;
+class RpcMethod;
+
+// Wrapper that performs a blocking unary call
+template <class InputMessage, class OutputMessage>
+Status BlockingUnaryCall(ChannelInterface* channel, const RpcMethod& method,
+                         ClientContext* context, const InputMessage& request,
+                         OutputMessage* result) {
+  CompletionQueue cq;
+  Call call(channel->CreateCall(method, context, &cq));
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+            CallOpRecvInitialMetadata, CallOpRecvMessage<OutputMessage>,
+            CallOpClientSendClose, CallOpClientRecvStatus> ops;
+  Status status = ops.SendMessage(request);
+  if (!status.ok()) {
+    return status;
+  }
+  ops.SendInitialMetadata(context->send_initial_metadata_);
+  ops.RecvInitialMetadata(context);
+  ops.RecvMessage(result);
+  ops.ClientSendClose();
+  ops.ClientRecvStatus(context, &status);
+  call.PerformOps(&ops);
+  GPR_ASSERT((cq.Pluck(&ops) && ops.got_message) || !status.ok());
+  return status;
+}
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CLIENT_UNARY_CALL_H
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
new file mode 100644
index 0000000000000000000000000000000000000000..102831e1c9b1ada83979e513f6f8f00981651753
--- /dev/null
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -0,0 +1,202 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/// A completion queue implements a concurrent producer-consumer queue, with two
+/// main methods, \a Next and \a AsyncNext.
+#ifndef GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
+#define GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
+
+#include <grpc++/impl/codegen/grpc_library.h>
+#include <grpc++/impl/codegen/status.h>
+#include <grpc++/impl/codegen/time.h>
+
+struct grpc_completion_queue;
+
+namespace grpc {
+
+template <class R>
+class ClientReader;
+template <class W>
+class ClientWriter;
+template <class W, class R>
+class ClientReaderWriter;
+template <class R>
+class ServerReader;
+template <class W>
+class ServerWriter;
+template <class W, class R>
+class ServerReaderWriter;
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ClientStreamingHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ServerStreamingHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class BidiStreamingHandler;
+class UnknownMethodHandler;
+
+class Channel;
+class ChannelInterface;
+class ClientContext;
+class CompletionQueueTag;
+class CompletionQueue;
+class RpcMethod;
+class Server;
+class ServerBuilder;
+class ServerContext;
+
+/// A thin wrapper around \a grpc_completion_queue (see / \a
+/// src/core/surface/completion_queue.h).
+class CompletionQueue : private GrpcLibrary {
+ public:
+  /// Default constructor. Implicitly creates a \a grpc_completion_queue
+  /// instance.
+  CompletionQueue();
+
+  /// Wrap \a take, taking ownership of the instance.
+  ///
+  /// \param take The completion queue instance to wrap. Ownership is taken.
+  explicit CompletionQueue(grpc_completion_queue* take);
+
+  /// Destructor. Destroys the owned wrapped completion queue / instance.
+  ~CompletionQueue();
+
+  /// Tri-state return for AsyncNext: SHUTDOWN, GOT_EVENT, TIMEOUT.
+  enum NextStatus {
+    SHUTDOWN,   ///< The completion queue has been shutdown.
+    GOT_EVENT,  ///< Got a new event; \a tag will be filled in with its
+                ///< associated value; \a ok indicating its success.
+    TIMEOUT     ///< deadline was reached.
+  };
+
+  /// Read from the queue, blocking up to \a deadline (or the queue's shutdown).
+  /// Both \a tag and \a ok are updated upon success (if an event is available
+  /// within the \a deadline).  A \a tag points to an arbitrary location usually
+  /// employed to uniquely identify an event.
+  ///
+  /// \param tag[out] Upon sucess, updated to point to the event's tag.
+  /// \param ok[out] Upon sucess, true if read a regular event, false otherwise.
+  /// \param deadline[in] How long to block in wait for an event.
+  ///
+  /// \return The type of event read.
+  template <typename T>
+  NextStatus AsyncNext(void** tag, bool* ok, const T& deadline) {
+    TimePoint<T> deadline_tp(deadline);
+    return AsyncNextInternal(tag, ok, deadline_tp.raw_time());
+  }
+
+  /// Read from the queue, blocking until an event is available or the queue is
+  /// shutting down.
+  ///
+  /// \param tag[out] Updated to point to the read event's tag.
+  /// \param ok[out] true if read a regular event, false otherwise.
+  ///
+  /// \return true if read a regular event, false if the queue is shutting down.
+  bool Next(void** tag, bool* ok) {
+    return (AsyncNextInternal(tag, ok, gpr_inf_future(GPR_CLOCK_REALTIME)) !=
+            SHUTDOWN);
+  }
+
+  /// Request the shutdown of the queue.
+  ///
+  /// \warning This method must be called at some point. Once invoked, \a Next
+  /// will start to return false and \a AsyncNext will return \a
+  /// NextStatus::SHUTDOWN. Only once either one of these methods does that
+  /// (that is, once the queue has been \em drained) can an instance of this
+  /// class be destroyed.
+  void Shutdown();
+
+  /// Returns a \em raw pointer to the underlying \a grpc_completion_queue
+  /// instance.
+  ///
+  /// \warning Remember that the returned instance is owned. No transfer of
+  /// owership is performed.
+  grpc_completion_queue* cq() { return cq_; }
+
+ private:
+  // Friend synchronous wrappers so that they can access Pluck(), which is
+  // a semi-private API geared towards the synchronous implementation.
+  template <class R>
+  friend class ::grpc::ClientReader;
+  template <class W>
+  friend class ::grpc::ClientWriter;
+  template <class W, class R>
+  friend class ::grpc::ClientReaderWriter;
+  template <class R>
+  friend class ::grpc::ServerReader;
+  template <class W>
+  friend class ::grpc::ServerWriter;
+  template <class W, class R>
+  friend class ::grpc::ServerReaderWriter;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class RpcMethodHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class ClientStreamingHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class ServerStreamingHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class BidiStreamingHandler;
+  friend class UnknownMethodHandler;
+  friend class ::grpc::Server;
+  friend class ::grpc::ServerContext;
+  template <class InputMessage, class OutputMessage>
+  friend Status BlockingUnaryCall(ChannelInterface* channel,
+                                  const RpcMethod& method,
+                                  ClientContext* context,
+                                  const InputMessage& request,
+                                  OutputMessage* result);
+
+  NextStatus AsyncNextInternal(void** tag, bool* ok, gpr_timespec deadline);
+
+  /// Wraps \a grpc_completion_queue_pluck.
+  /// \warning Must not be mixed with calls to \a Next.
+  bool Pluck(CompletionQueueTag* tag);
+
+  /// Performs a single polling pluck on \a tag.
+  void TryPluck(CompletionQueueTag* tag);
+
+  grpc_completion_queue* cq_;  // owned
+};
+
+/// A specific type of completion queue used by the processing of notifications
+/// by servers. Instantiated by \a ServerBuilder.
+class ServerCompletionQueue : public CompletionQueue {
+ private:
+  friend class ServerBuilder;
+  ServerCompletionQueue() {}
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
diff --git a/include/grpc++/impl/codegen/completion_queue_tag.h b/include/grpc++/impl/codegen/completion_queue_tag.h
new file mode 100644
index 0000000000000000000000000000000000000000..8be2ac36d6e85e83211e7d827e7fdbb5446c35d2
--- /dev/null
+++ b/include/grpc++/impl/codegen/completion_queue_tag.h
@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_COMPLETION_QUEUE_TAG_H
+#define GRPCXX_COMPLETION_QUEUE_TAG_H
+
+namespace grpc {
+
+/// An interface allowing implementors to process and filter event tags.
+class CompletionQueueTag {
+ public:
+  virtual ~CompletionQueueTag() {}
+  // Called prior to returning from Next(), return value is the status of the
+  // operation (return status is the default thing to do). If this function
+  // returns false, the tag is dropped and not returned from the completion
+  // queue
+  virtual bool FinalizeResult(void** tag, bool* status) = 0;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_COMPLETION_QUEUE_TAG_H
diff --git a/include/grpc++/impl/codegen/config.h b/include/grpc++/impl/codegen/config.h
new file mode 100644
index 0000000000000000000000000000000000000000..d782d5f5713e84f03163bd11d3bfcbce2662379f
--- /dev/null
+++ b/include/grpc++/impl/codegen/config.h
@@ -0,0 +1,116 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CONFIG_H
+#define GRPCXX_IMPL_CODEGEN_CONFIG_H
+
+#if !defined(GRPC_NO_AUTODETECT_PLATFORM)
+
+#ifdef _MSC_VER
+// Visual Studio 2010 is 1600.
+#if _MSC_VER < 1600
+#error "gRPC is only supported with Visual Studio starting at 2010"
+// Visual Studio 2013 is 1800.
+#elif _MSC_VER < 1800
+#define GRPC_CXX0X_NO_FINAL 1
+#define GRPC_CXX0X_NO_OVERRIDE 1
+#define GRPC_CXX0X_NO_CHRONO 1
+#define GRPC_CXX0X_NO_THREAD 1
+#endif
+#endif  // Visual Studio
+
+#ifndef __clang__
+#ifdef __GNUC__
+// nullptr was added in gcc 4.6
+#if (__GNUC__ * 100 + __GNUC_MINOR__ < 406)
+#define GRPC_CXX0X_NO_NULLPTR 1
+#endif
+// final and override were added in gcc 4.7
+#if (__GNUC__ * 100 + __GNUC_MINOR__ < 407)
+#define GRPC_CXX0X_NO_FINAL 1
+#define GRPC_CXX0X_NO_OVERRIDE 1
+#endif
+#endif
+#endif
+
+#endif
+
+#ifdef GRPC_CXX0X_NO_FINAL
+#define GRPC_FINAL
+#else
+#define GRPC_FINAL final
+#endif
+
+#ifdef GRPC_CXX0X_NO_OVERRIDE
+#define GRPC_OVERRIDE
+#else
+#define GRPC_OVERRIDE override
+#endif
+
+#ifdef GRPC_CXX0X_NO_NULLPTR
+#include <memory>
+namespace grpc {
+const class {
+ public:
+  template <class T>
+  operator T *() const {
+    return static_cast<T *>(0);
+  }
+  template <class T>
+  operator std::unique_ptr<T>() const {
+    return std::unique_ptr<T>(static_cast<T *>(0));
+  }
+  template <class T>
+  operator std::shared_ptr<T>() const {
+    return std::shared_ptr<T>(static_cast<T *>(0));
+  }
+  operator bool() const { return false; }
+
+ private:
+  void operator&() const = delete;
+} nullptr = {};
+}
+#endif
+
+#ifndef GRPC_CUSTOM_STRING
+#include <string>
+#define GRPC_CUSTOM_STRING std::string
+#endif
+
+namespace grpc {
+
+typedef GRPC_CUSTOM_STRING string;
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CONFIG_H
diff --git a/include/grpc++/impl/codegen/config_protobuf.h b/include/grpc++/impl/codegen/config_protobuf.h
new file mode 100644
index 0000000000000000000000000000000000000000..3b9f05cdff5b48241cd678fb461bd4617a5c34b9
--- /dev/null
+++ b/include/grpc++/impl/codegen/config_protobuf.h
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_CONFIG_PROTOBUF_H
+#define GRPCXX_IMPL_CODEGEN_CONFIG_PROTOBUF_H
+
+#ifndef GRPC_CUSTOM_PROTOBUF_INT64
+#include <google/protobuf/stubs/common.h>
+#define GRPC_CUSTOM_PROTOBUF_INT64 ::google::protobuf::int64
+#endif
+
+#ifndef GRPC_CUSTOM_MESSAGE
+#include <google/protobuf/message.h>
+#define GRPC_CUSTOM_MESSAGE ::google::protobuf::Message
+#endif
+
+#ifndef GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM
+#include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/io/zero_copy_stream.h>
+#define GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM \
+  ::google::protobuf::io::ZeroCopyOutputStream
+#define GRPC_CUSTOM_ZEROCOPYINPUTSTREAM \
+  ::google::protobuf::io::ZeroCopyInputStream
+#define GRPC_CUSTOM_CODEDINPUTSTREAM ::google::protobuf::io::CodedInputStream
+#endif
+
+namespace grpc {
+namespace protobuf {
+
+typedef GRPC_CUSTOM_MESSAGE Message;
+typedef GRPC_CUSTOM_PROTOBUF_INT64 int64;
+
+namespace io {
+typedef GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM ZeroCopyOutputStream;
+typedef GRPC_CUSTOM_ZEROCOPYINPUTSTREAM ZeroCopyInputStream;
+typedef GRPC_CUSTOM_CODEDINPUTSTREAM CodedInputStream;
+}  // namespace io
+
+}  // namespace protobuf
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_CONFIG_PROTOBUF_H
diff --git a/include/grpc++/impl/codegen/grpc_library.h b/include/grpc++/impl/codegen/grpc_library.h
new file mode 100644
index 0000000000000000000000000000000000000000..eb7152a2c60afc96b9b916aaf2908d646a7453b7
--- /dev/null
+++ b/include/grpc++/impl/codegen/grpc_library.h
@@ -0,0 +1,67 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_GRPC_LIBRARY_H
+#define GRPCXX_IMPL_CODEGEN_GRPC_LIBRARY_H
+
+#include <grpc/impl/codegen/log.h>
+
+namespace grpc {
+
+class GrpcLibraryInterface {
+ public:
+  virtual void init() = 0;
+  virtual void shutdown() = 0;
+};
+
+extern GrpcLibraryInterface* g_glip;
+
+class GrpcLibrary {
+ public:
+  GrpcLibrary() {
+    GPR_ASSERT(g_glip &&
+               "gRPC library not initialized. See "
+               "grpc::internal::GrpcLibraryInitializer.");
+    g_glip->init();
+  }
+  virtual ~GrpcLibrary() {
+    GPR_ASSERT(g_glip &&
+               "gRPC library not initialized. See "
+               "grpc::internal::GrpcLibraryInitializer.");
+    g_glip->shutdown();
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_GRPC_LIBRARY_H
diff --git a/include/grpc++/impl/codegen/method_handler_impl.h b/include/grpc++/impl/codegen/method_handler_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bf9bf05499c3883931694ad60ad7624106429cf
--- /dev/null
+++ b/include/grpc++/impl/codegen/method_handler_impl.h
@@ -0,0 +1,203 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_METHOD_HANDLER_IMPL_H
+#define GRPCXX_IMPL_CODEGEN_METHOD_HANDLER_IMPL_H
+
+#include <grpc++/impl/codegen/rpc_service_method.h>
+#include <grpc++/impl/codegen/sync_stream.h>
+
+namespace grpc {
+
+// A wrapper class of an application provided rpc method handler.
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler : public MethodHandler {
+ public:
+  RpcMethodHandler(
+      std::function<Status(ServiceType*, ServerContext*, const RequestType*,
+                           ResponseType*)> func,
+      ServiceType* service)
+      : func_(func), service_(service) {}
+
+  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
+    RequestType req;
+    Status status = SerializationTraits<RequestType>::Deserialize(
+        param.request, &req, param.max_message_size);
+    ResponseType rsp;
+    if (status.ok()) {
+      status = func_(service_, param.server_context, &req, &rsp);
+    }
+
+    GPR_ASSERT(!param.server_context->sent_initial_metadata_);
+    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+              CallOpServerSendStatus> ops;
+    ops.SendInitialMetadata(param.server_context->initial_metadata_);
+    if (status.ok()) {
+      status = ops.SendMessage(rsp);
+    }
+    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
+    param.call->PerformOps(&ops);
+    param.call->cq()->Pluck(&ops);
+  }
+
+ private:
+  // Application provided rpc handler function.
+  std::function<Status(ServiceType*, ServerContext*, const RequestType*,
+                       ResponseType*)> func_;
+  // The class the above handler function lives in.
+  ServiceType* service_;
+};
+
+// A wrapper class of an application provided client streaming handler.
+template <class ServiceType, class RequestType, class ResponseType>
+class ClientStreamingHandler : public MethodHandler {
+ public:
+  ClientStreamingHandler(
+      std::function<Status(ServiceType*, ServerContext*,
+                           ServerReader<RequestType>*, ResponseType*)> func,
+      ServiceType* service)
+      : func_(func), service_(service) {}
+
+  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
+    ServerReader<RequestType> reader(param.call, param.server_context);
+    ResponseType rsp;
+    Status status = func_(service_, param.server_context, &reader, &rsp);
+
+    GPR_ASSERT(!param.server_context->sent_initial_metadata_);
+    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+              CallOpServerSendStatus> ops;
+    ops.SendInitialMetadata(param.server_context->initial_metadata_);
+    if (status.ok()) {
+      status = ops.SendMessage(rsp);
+    }
+    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
+    param.call->PerformOps(&ops);
+    param.call->cq()->Pluck(&ops);
+  }
+
+ private:
+  std::function<Status(ServiceType*, ServerContext*, ServerReader<RequestType>*,
+                       ResponseType*)> func_;
+  ServiceType* service_;
+};
+
+// A wrapper class of an application provided server streaming handler.
+template <class ServiceType, class RequestType, class ResponseType>
+class ServerStreamingHandler : public MethodHandler {
+ public:
+  ServerStreamingHandler(
+      std::function<Status(ServiceType*, ServerContext*, const RequestType*,
+                           ServerWriter<ResponseType>*)> func,
+      ServiceType* service)
+      : func_(func), service_(service) {}
+
+  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
+    RequestType req;
+    Status status = SerializationTraits<RequestType>::Deserialize(
+        param.request, &req, param.max_message_size);
+
+    if (status.ok()) {
+      ServerWriter<ResponseType> writer(param.call, param.server_context);
+      status = func_(service_, param.server_context, &req, &writer);
+    }
+
+    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
+    if (!param.server_context->sent_initial_metadata_) {
+      ops.SendInitialMetadata(param.server_context->initial_metadata_);
+    }
+    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
+    param.call->PerformOps(&ops);
+    param.call->cq()->Pluck(&ops);
+  }
+
+ private:
+  std::function<Status(ServiceType*, ServerContext*, const RequestType*,
+                       ServerWriter<ResponseType>*)> func_;
+  ServiceType* service_;
+};
+
+// A wrapper class of an application provided bidi-streaming handler.
+template <class ServiceType, class RequestType, class ResponseType>
+class BidiStreamingHandler : public MethodHandler {
+ public:
+  BidiStreamingHandler(
+      std::function<Status(ServiceType*, ServerContext*,
+                           ServerReaderWriter<ResponseType, RequestType>*)>
+          func,
+      ServiceType* service)
+      : func_(func), service_(service) {}
+
+  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
+    ServerReaderWriter<ResponseType, RequestType> stream(param.call,
+                                                         param.server_context);
+    Status status = func_(service_, param.server_context, &stream);
+
+    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
+    if (!param.server_context->sent_initial_metadata_) {
+      ops.SendInitialMetadata(param.server_context->initial_metadata_);
+    }
+    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
+    param.call->PerformOps(&ops);
+    param.call->cq()->Pluck(&ops);
+  }
+
+ private:
+  std::function<Status(ServiceType*, ServerContext*,
+                       ServerReaderWriter<ResponseType, RequestType>*)> func_;
+  ServiceType* service_;
+};
+
+// Handle unknown method by returning UNIMPLEMENTED error.
+class UnknownMethodHandler : public MethodHandler {
+ public:
+  template <class T>
+  static void FillOps(ServerContext* context, T* ops) {
+    Status status(StatusCode::UNIMPLEMENTED, "");
+    if (!context->sent_initial_metadata_) {
+      ops->SendInitialMetadata(context->initial_metadata_);
+      context->sent_initial_metadata_ = true;
+    }
+    ops->ServerSendStatus(context->trailing_metadata_, status);
+  }
+
+  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
+    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
+    FillOps(param.server_context, &ops);
+    param.call->PerformOps(&ops);
+    param.call->cq()->Pluck(&ops);
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_METHOD_HANDLER_IMPL_H
diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..ce177104e00dbdf0d4976cea826c827ad2901bd0
--- /dev/null
+++ b/include/grpc++/impl/codegen/proto_utils.h
@@ -0,0 +1,76 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_PROTO_UTILS_H
+#define GRPCXX_IMPL_CODEGEN_PROTO_UTILS_H
+
+#include <type_traits>
+
+#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc++/impl/codegen/serialization_traits.h>
+#include <grpc++/impl/codegen/config_protobuf.h>
+#include <grpc++/impl/codegen/status.h>
+
+namespace grpc {
+
+// Serialize the msg into a buffer created inside the function. The caller
+// should destroy the returned buffer when done with it. If serialization fails,
+// false is returned and buffer is left unchanged.
+Status SerializeProto(const grpc::protobuf::Message& msg,
+                      grpc_byte_buffer** buffer);
+
+// The caller keeps ownership of buffer and msg.
+Status DeserializeProto(grpc_byte_buffer* buffer, grpc::protobuf::Message* msg,
+                        int max_message_size);
+
+template <class T>
+class SerializationTraits<T, typename std::enable_if<std::is_base_of<
+                                 grpc::protobuf::Message, T>::value>::type> {
+ public:
+  static Status Serialize(const grpc::protobuf::Message& msg,
+                          grpc_byte_buffer** buffer, bool* own_buffer) {
+    *own_buffer = true;
+    return SerializeProto(msg, buffer);
+  }
+  static Status Deserialize(grpc_byte_buffer* buffer,
+                            grpc::protobuf::Message* msg,
+                            int max_message_size) {
+    auto status = DeserializeProto(buffer, msg, max_message_size);
+    grpc_byte_buffer_destroy(buffer);
+    return status;
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_PROTO_UTILS_H
diff --git a/include/grpc++/impl/codegen/rpc_method.h b/include/grpc++/impl/codegen/rpc_method.h
new file mode 100644
index 0000000000000000000000000000000000000000..85d5c1cfe2a325e01db335fe88664866deac1cfb
--- /dev/null
+++ b/include/grpc++/impl/codegen/rpc_method.h
@@ -0,0 +1,73 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_RPC_METHOD_H
+#define GRPCXX_IMPL_CODEGEN_RPC_METHOD_H
+
+#include <memory>
+
+#include <grpc++/impl/codegen/channel_interface.h>
+
+namespace grpc {
+
+class RpcMethod {
+ public:
+  enum RpcType {
+    NORMAL_RPC = 0,
+    CLIENT_STREAMING,  // request streaming
+    SERVER_STREAMING,  // response streaming
+    BIDI_STREAMING
+  };
+
+  RpcMethod(const char* name, RpcType type)
+      : name_(name), method_type_(type), channel_tag_(NULL) {}
+
+  RpcMethod(const char* name, RpcType type,
+            const std::shared_ptr<ChannelInterface>& channel)
+      : name_(name),
+        method_type_(type),
+        channel_tag_(channel->RegisterMethod(name)) {}
+
+  const char* name() const { return name_; }
+  RpcType method_type() const { return method_type_; }
+  void* channel_tag() const { return channel_tag_; }
+
+ private:
+  const char* const name_;
+  const RpcType method_type_;
+  void* const channel_tag_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_RPC_METHOD_H
diff --git a/include/grpc++/impl/codegen/rpc_service_method.h b/include/grpc++/impl/codegen/rpc_service_method.h
new file mode 100644
index 0000000000000000000000000000000000000000..519d942fc43fed19dccbd1c66d49ad291d13f536
--- /dev/null
+++ b/include/grpc++/impl/codegen/rpc_service_method.h
@@ -0,0 +1,92 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_RPC_SERVICE_METHOD_H
+#define GRPCXX_IMPL_CODEGEN_RPC_SERVICE_METHOD_H
+
+#include <climits>
+#include <functional>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/rpc_method.h>
+#include <grpc++/impl/codegen/status.h>
+
+namespace grpc {
+class ServerContext;
+class StreamContextInterface;
+
+// Base class for running an RPC handler.
+class MethodHandler {
+ public:
+  virtual ~MethodHandler() {}
+  struct HandlerParameter {
+    HandlerParameter(Call* c, ServerContext* context, grpc_byte_buffer* req,
+                     int max_size)
+        : call(c),
+          server_context(context),
+          request(req),
+          max_message_size(max_size) {}
+    Call* call;
+    ServerContext* server_context;
+    // Handler required to grpc_byte_buffer_destroy this
+    grpc_byte_buffer* request;
+    int max_message_size;
+  };
+  virtual void RunHandler(const HandlerParameter& param) = 0;
+};
+
+// Server side rpc method class
+class RpcServiceMethod : public RpcMethod {
+ public:
+  // Takes ownership of the handler
+  RpcServiceMethod(const char* name, RpcMethod::RpcType type,
+                   MethodHandler* handler)
+      : RpcMethod(name, type), server_tag_(nullptr), handler_(handler) {}
+
+  void set_server_tag(void* tag) { server_tag_ = tag; }
+  void* server_tag() const { return server_tag_; }
+  // if MethodHandler is nullptr, then this is an async method
+  MethodHandler* handler() const { return handler_.get(); }
+  void ResetHandler() { handler_.reset(); }
+
+ private:
+  void* server_tag_;
+  std::unique_ptr<MethodHandler> handler_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_RPC_SERVICE_METHOD_H
diff --git a/include/grpc++/impl/codegen/security/auth_context.h b/include/grpc++/impl/codegen/security/auth_context.h
new file mode 100644
index 0000000000000000000000000000000000000000..7544430811e9363ebcb637223eebccdda4e8ca50
--- /dev/null
+++ b/include/grpc++/impl/codegen/security/auth_context.h
@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SECURITY_AUTH_CONTEXT_H
+#define GRPCXX_IMPL_CODEGEN_SECURITY_AUTH_CONTEXT_H
+
+#include <iterator>
+#include <vector>
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/string_ref.h>
+
+struct grpc_auth_context;
+struct grpc_auth_property;
+struct grpc_auth_property_iterator;
+
+namespace grpc {
+class SecureAuthContext;
+
+typedef std::pair<grpc::string_ref, grpc::string_ref> AuthProperty;
+
+class AuthPropertyIterator
+    : public std::iterator<std::input_iterator_tag, const AuthProperty> {
+ public:
+  ~AuthPropertyIterator();
+  AuthPropertyIterator& operator++();
+  AuthPropertyIterator operator++(int);
+  bool operator==(const AuthPropertyIterator& rhs) const;
+  bool operator!=(const AuthPropertyIterator& rhs) const;
+  const AuthProperty operator*();
+
+ protected:
+  AuthPropertyIterator();
+  AuthPropertyIterator(const grpc_auth_property* property,
+                       const grpc_auth_property_iterator* iter);
+
+ private:
+  friend class SecureAuthContext;
+  const grpc_auth_property* property_;
+  // The following items form a grpc_auth_property_iterator.
+  const grpc_auth_context* ctx_;
+  size_t index_;
+  const char* name_;
+};
+
+/// Class encapsulating the Authentication Information.
+///
+/// It includes the secure identity of the peer, the type of secure transport
+/// used as well as any other properties required by the authorization layer.
+class AuthContext {
+ public:
+  virtual ~AuthContext() {}
+
+  /// Returns true if the peer is authenticated.
+  virtual bool IsPeerAuthenticated() const = 0;
+
+  /// A peer identity.
+  ///
+  /// It is, in general, comprised of one or more properties (in which case they
+  /// have the same name).
+  virtual std::vector<grpc::string_ref> GetPeerIdentity() const = 0;
+  virtual grpc::string GetPeerIdentityPropertyName() const = 0;
+
+  /// Returns all the property values with the given name.
+  virtual std::vector<grpc::string_ref> FindPropertyValues(
+      const grpc::string& name) const = 0;
+
+  /// Iteration over all the properties.
+  virtual AuthPropertyIterator begin() const = 0;
+  virtual AuthPropertyIterator end() const = 0;
+
+  // Mutation functions: should only be used by an AuthMetadataProcessor.
+  virtual void AddProperty(const grpc::string& key,
+                           const grpc::string_ref& value) = 0;
+  virtual bool SetPeerIdentityPropertyName(const grpc::string& name) = 0;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SECURITY_AUTH_CONTEXT_H
diff --git a/include/grpc++/impl/codegen/serialization_traits.h b/include/grpc++/impl/codegen/serialization_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..83c3b64eb3cce908d53c5854a680393bf146a127
--- /dev/null
+++ b/include/grpc++/impl/codegen/serialization_traits.h
@@ -0,0 +1,68 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SERIALIZATION_TRAITS_H
+#define GRPCXX_IMPL_CODEGEN_SERIALIZATION_TRAITS_H
+
+namespace grpc {
+
+/// Defines how to serialize and deserialize some type.
+///
+/// Used for hooking different message serialization API's into GRPC.
+/// Each SerializationTraits implementation must provide the following
+/// functions:
+///   static Status Serialize(const Message& msg,
+///                           grpc_byte_buffer** buffer,
+//                            bool* own_buffer);
+///   static Status Deserialize(grpc_byte_buffer* buffer,
+///                             Message* msg,
+///                             int max_message_size);
+///
+/// Serialize is required to convert message to a grpc_byte_buffer, and
+/// to store a pointer to that byte buffer at *buffer. *own_buffer should
+/// be set to true if the caller owns said byte buffer, or false if
+/// ownership is retained elsewhere.
+///
+/// Deserialize is required to convert buffer into the message stored at
+/// msg. max_message_size is passed in as a bound on the maximum number of
+/// message bytes Deserialize should accept.
+///
+/// Both functions return a Status, allowing them to explain what went
+/// wrong if required.
+template <class Message,
+          class UnusedButHereForPartialTemplateSpecialization = void>
+class SerializationTraits;
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SERIALIZATION_TRAITS_H
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
new file mode 100644
index 0000000000000000000000000000000000000000..2af9fdaa34dc5564862986e8cfe4869e2b9ed5df
--- /dev/null
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -0,0 +1,201 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SERVER_CONTEXT_H
+#define GRPCXX_IMPL_CODEGEN_SERVER_CONTEXT_H
+
+#include <map>
+#include <memory>
+
+#include <grpc/impl/codegen/compression_types.h>
+#include <grpc/impl/codegen/time.h>
+#include <grpc++/impl/codegen/security/auth_context.h>
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/string_ref.h>
+#include <grpc++/impl/codegen/time.h>
+
+struct gpr_timespec;
+struct grpc_metadata;
+struct grpc_call;
+struct census_context;
+
+namespace grpc {
+
+class ClientContext;
+template <class W, class R>
+class ServerAsyncReader;
+template <class W>
+class ServerAsyncWriter;
+template <class W>
+class ServerAsyncResponseWriter;
+template <class W, class R>
+class ServerAsyncReaderWriter;
+template <class R>
+class ServerReader;
+template <class W>
+class ServerWriter;
+template <class W, class R>
+class ServerReaderWriter;
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ClientStreamingHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ServerStreamingHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class BidiStreamingHandler;
+class UnknownMethodHandler;
+
+class Call;
+class CallOpBuffer;
+class CompletionQueue;
+class Server;
+class ServerInterface;
+
+namespace testing {
+class InteropServerContextInspector;
+}  // namespace testing
+
+// Interface of server side rpc context.
+class ServerContext {
+ public:
+  ServerContext();  // for async calls
+  ~ServerContext();
+
+#ifndef GRPC_CXX0X_NO_CHRONO
+  std::chrono::system_clock::time_point deadline() {
+    return Timespec2Timepoint(deadline_);
+  }
+#endif  // !GRPC_CXX0X_NO_CHRONO
+
+  gpr_timespec raw_deadline() { return deadline_; }
+
+  void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
+  void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
+
+  bool IsCancelled() const;
+
+  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata() {
+    return client_metadata_;
+  }
+
+  grpc_compression_level compression_level() const {
+    return compression_level_;
+  }
+  void set_compression_level(grpc_compression_level level);
+
+  grpc_compression_algorithm compression_algorithm() const {
+    return compression_algorithm_;
+  }
+  void set_compression_algorithm(grpc_compression_algorithm algorithm);
+
+  std::shared_ptr<const AuthContext> auth_context() const;
+
+  // Return the peer uri in a string.
+  // WARNING: this value is never authenticated or subject to any security
+  // related code. It must not be used for any authentication related
+  // functionality. Instead, use auth_context.
+  grpc::string peer() const;
+
+  const struct census_context* census_context() const;
+
+  // Async only. Has to be called before the rpc starts.
+  // Returns the tag in completion queue when the rpc finishes.
+  // IsCancelled() can then be called to check whether the rpc was cancelled.
+  void AsyncNotifyWhenDone(void* tag) {
+    has_notify_when_done_tag_ = true;
+    async_notify_when_done_tag_ = tag;
+  }
+
+ private:
+  friend class ::grpc::testing::InteropServerContextInspector;
+  friend class ::grpc::ServerInterface;
+  friend class ::grpc::Server;
+  template <class W, class R>
+  friend class ::grpc::ServerAsyncReader;
+  template <class W>
+  friend class ::grpc::ServerAsyncWriter;
+  template <class W>
+  friend class ::grpc::ServerAsyncResponseWriter;
+  template <class W, class R>
+  friend class ::grpc::ServerAsyncReaderWriter;
+  template <class R>
+  friend class ::grpc::ServerReader;
+  template <class W>
+  friend class ::grpc::ServerWriter;
+  template <class W, class R>
+  friend class ::grpc::ServerReaderWriter;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class RpcMethodHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class ClientStreamingHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class ServerStreamingHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class BidiStreamingHandler;
+  friend class UnknownMethodHandler;
+  friend class ::grpc::ClientContext;
+
+  // Prevent copying.
+  ServerContext(const ServerContext&);
+  ServerContext& operator=(const ServerContext&);
+
+  class CompletionOp;
+
+  void BeginCompletionOp(Call* call);
+
+  ServerContext(gpr_timespec deadline, grpc_metadata* metadata,
+                size_t metadata_count);
+
+  void set_call(grpc_call* call);
+
+  CompletionOp* completion_op_;
+  bool has_notify_when_done_tag_;
+  void* async_notify_when_done_tag_;
+
+  gpr_timespec deadline_;
+  grpc_call* call_;
+  CompletionQueue* cq_;
+  bool sent_initial_metadata_;
+  mutable std::shared_ptr<const AuthContext> auth_context_;
+  std::multimap<grpc::string_ref, grpc::string_ref> client_metadata_;
+  std::multimap<grpc::string, grpc::string> initial_metadata_;
+  std::multimap<grpc::string, grpc::string> trailing_metadata_;
+
+  grpc_compression_level compression_level_;
+  grpc_compression_algorithm compression_algorithm_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SERVER_CONTEXT_H
diff --git a/include/grpc++/impl/codegen/server_interface.h b/include/grpc++/impl/codegen/server_interface.h
new file mode 100644
index 0000000000000000000000000000000000000000..96934edff35795f0bdb2cd17d806a0c94df222a6
--- /dev/null
+++ b/include/grpc++/impl/codegen/server_interface.h
@@ -0,0 +1,254 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
+#define GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
+
+#include <grpc++/impl/codegen/call_hook.h>
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <grpc++/impl/codegen/rpc_service_method.h>
+
+namespace grpc {
+
+class AsyncGenericService;
+class AsynchronousService;
+class GenericServerContext;
+class RpcService;
+class ServerAsyncStreamingInterface;
+class ServerCompletionQueue;
+class ServerContext;
+class ServerCredentials;
+class Service;
+class ThreadPoolInterface;
+
+/// Models a gRPC server.
+///
+/// Servers are configured and started via \a grpc::ServerBuilder.
+class ServerInterface : public CallHook {
+ public:
+  virtual ~ServerInterface() {}
+
+  /// Shutdown the server, blocking until all rpc processing finishes.
+  /// Forcefully terminate pending calls after \a deadline expires.
+  ///
+  /// \param deadline How long to wait until pending rpcs are forcefully
+  /// terminated.
+  template <class T>
+  void Shutdown(const T& deadline) {
+    ShutdownInternal(TimePoint<T>(deadline).raw_time());
+  }
+
+  /// Shutdown the server, waiting for all rpc processing to finish.
+  void Shutdown() { ShutdownInternal(gpr_inf_future(GPR_CLOCK_MONOTONIC)); }
+
+  /// Block waiting for all work to complete.
+  ///
+  /// \warning The server must be either shutting down or some other thread must
+  /// call \a Shutdown for this function to ever return.
+  virtual void Wait() = 0;
+
+ protected:
+  friend class AsynchronousService;
+  friend class Service;
+
+  /// Register a service. This call does not take ownership of the service.
+  /// The service must exist for the lifetime of the Server instance.
+  virtual bool RegisterService(const grpc::string* host, Service* service) = 0;
+
+  /// Register a generic service. This call does not take ownership of the
+  /// service. The service must exist for the lifetime of the Server instance.
+  virtual void RegisterAsyncGenericService(AsyncGenericService* service) = 0;
+
+  /// Tries to bind \a server to the given \a addr.
+  ///
+  /// It can be invoked multiple times.
+  ///
+  /// \param addr The address to try to bind to the server (eg, localhost:1234,
+  /// 192.168.1.1:31416, [::1]:27182, etc.).
+  /// \params creds The credentials associated with the server.
+  ///
+  /// \return bound port number on sucess, 0 on failure.
+  ///
+  /// \warning It's an error to call this method on an already started server.
+  virtual int AddListeningPort(const grpc::string& addr,
+                               ServerCredentials* creds) = 0;
+
+  /// Start the server.
+  ///
+  /// \param cqs Completion queues for handling asynchronous services. The
+  /// caller is required to keep all completion queues live until the server is
+  /// destroyed.
+  /// \param num_cqs How many completion queues does \a cqs hold.
+  ///
+  /// \return true on a successful shutdown.
+  virtual bool Start(ServerCompletionQueue** cqs, size_t num_cqs) = 0;
+
+  /// Process one or more incoming calls.
+  virtual void RunRpc() = 0;
+
+  /// Schedule \a RunRpc to run in the threadpool.
+  virtual void ScheduleCallback() = 0;
+
+  virtual void ShutdownInternal(gpr_timespec deadline) = 0;
+
+  virtual int max_message_size() const = 0;
+
+  virtual grpc_server* server() = 0;
+
+  virtual void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) = 0;
+
+  class BaseAsyncRequest : public CompletionQueueTag {
+   public:
+    BaseAsyncRequest(ServerInterface* server, ServerContext* context,
+                     ServerAsyncStreamingInterface* stream,
+                     CompletionQueue* call_cq, void* tag,
+                     bool delete_on_finalize);
+    virtual ~BaseAsyncRequest() {}
+
+    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
+
+   protected:
+    ServerInterface* const server_;
+    ServerContext* const context_;
+    ServerAsyncStreamingInterface* const stream_;
+    CompletionQueue* const call_cq_;
+    void* const tag_;
+    const bool delete_on_finalize_;
+    grpc_call* call_;
+    grpc_metadata_array initial_metadata_array_;
+  };
+
+  class RegisteredAsyncRequest : public BaseAsyncRequest {
+   public:
+    RegisteredAsyncRequest(ServerInterface* server, ServerContext* context,
+                           ServerAsyncStreamingInterface* stream,
+                           CompletionQueue* call_cq, void* tag);
+
+    // uses BaseAsyncRequest::FinalizeResult
+
+   protected:
+    void IssueRequest(void* registered_method, grpc_byte_buffer** payload,
+                      ServerCompletionQueue* notification_cq);
+  };
+
+  class NoPayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
+   public:
+    NoPayloadAsyncRequest(void* registered_method, ServerInterface* server,
+                          ServerContext* context,
+                          ServerAsyncStreamingInterface* stream,
+                          CompletionQueue* call_cq,
+                          ServerCompletionQueue* notification_cq, void* tag)
+        : RegisteredAsyncRequest(server, context, stream, call_cq, tag) {
+      IssueRequest(registered_method, nullptr, notification_cq);
+    }
+
+    // uses RegisteredAsyncRequest::FinalizeResult
+  };
+
+  template <class Message>
+  class PayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
+   public:
+    PayloadAsyncRequest(void* registered_method, ServerInterface* server,
+                        ServerContext* context,
+                        ServerAsyncStreamingInterface* stream,
+                        CompletionQueue* call_cq,
+                        ServerCompletionQueue* notification_cq, void* tag,
+                        Message* request)
+        : RegisteredAsyncRequest(server, context, stream, call_cq, tag),
+          request_(request) {
+      IssueRequest(registered_method, &payload_, notification_cq);
+    }
+
+    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
+      bool serialization_status =
+          *status && payload_ &&
+          SerializationTraits<Message>::Deserialize(
+              payload_, request_, server_->max_message_size()).ok();
+      bool ret = RegisteredAsyncRequest::FinalizeResult(tag, status);
+      *status = serialization_status&&* status;
+      return ret;
+    }
+
+   private:
+    grpc_byte_buffer* payload_;
+    Message* const request_;
+  };
+
+  class GenericAsyncRequest : public BaseAsyncRequest {
+   public:
+    GenericAsyncRequest(ServerInterface* server, GenericServerContext* context,
+                        ServerAsyncStreamingInterface* stream,
+                        CompletionQueue* call_cq,
+                        ServerCompletionQueue* notification_cq, void* tag,
+                        bool delete_on_finalize);
+
+    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
+
+   private:
+    grpc_call_details call_details_;
+  };
+
+  template <class Message>
+  void RequestAsyncCall(RpcServiceMethod* method, ServerContext* context,
+                        ServerAsyncStreamingInterface* stream,
+                        CompletionQueue* call_cq,
+                        ServerCompletionQueue* notification_cq, void* tag,
+                        Message* message) {
+    GPR_ASSERT(method);
+    new PayloadAsyncRequest<Message>(method->server_tag(), this, context,
+                                     stream, call_cq, notification_cq, tag,
+                                     message);
+  }
+
+  void RequestAsyncCall(RpcServiceMethod* method, ServerContext* context,
+                        ServerAsyncStreamingInterface* stream,
+                        CompletionQueue* call_cq,
+                        ServerCompletionQueue* notification_cq, void* tag) {
+    GPR_ASSERT(method);
+    new NoPayloadAsyncRequest(method->server_tag(), this, context, stream,
+                              call_cq, notification_cq, tag);
+  }
+
+  void RequestAsyncGenericCall(GenericServerContext* context,
+                               ServerAsyncStreamingInterface* stream,
+                               CompletionQueue* call_cq,
+                               ServerCompletionQueue* notification_cq,
+                               void* tag) {
+    new GenericAsyncRequest(this, context, stream, call_cq, notification_cq,
+                            tag, true);
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
diff --git a/include/grpc++/impl/codegen/service_type.h b/include/grpc++/impl/codegen/service_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..deb91a41d9633cfcd930b14b80ab350e1874786d
--- /dev/null
+++ b/include/grpc++/impl/codegen/service_type.h
@@ -0,0 +1,161 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SERVICE_TYPE_H
+#define GRPCXX_IMPL_CODEGEN_SERVICE_TYPE_H
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/rpc_service_method.h>
+#include <grpc++/impl/codegen/serialization_traits.h>
+#include <grpc++/impl/codegen/server_interface.h>
+#include <grpc++/impl/codegen/status.h>
+
+namespace grpc {
+
+class Call;
+class CompletionQueue;
+class Server;
+class ServerInterface;
+class ServerCompletionQueue;
+class ServerContext;
+
+class ServerAsyncStreamingInterface {
+ public:
+  virtual ~ServerAsyncStreamingInterface() {}
+
+  virtual void SendInitialMetadata(void* tag) = 0;
+
+ private:
+  friend class ServerInterface;
+  virtual void BindCall(Call* call) = 0;
+};
+
+class Service {
+ public:
+  Service() : server_(nullptr) {}
+  virtual ~Service() {}
+
+  bool has_async_methods() const {
+    for (auto it = methods_.begin(); it != methods_.end(); ++it) {
+      if (*it && (*it)->handler() == nullptr) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool has_synchronous_methods() const {
+    for (auto it = methods_.begin(); it != methods_.end(); ++it) {
+      if (*it && (*it)->handler() != nullptr) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool has_generic_methods() const {
+    for (auto it = methods_.begin(); it != methods_.end(); ++it) {
+      if (it->get() == nullptr) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+ protected:
+  template <class Message>
+  void RequestAsyncUnary(int index, ServerContext* context, Message* request,
+                         ServerAsyncStreamingInterface* stream,
+                         CompletionQueue* call_cq,
+                         ServerCompletionQueue* notification_cq, void* tag) {
+    server_->RequestAsyncCall(methods_[index].get(), context, stream, call_cq,
+                              notification_cq, tag, request);
+  }
+  void RequestAsyncClientStreaming(int index, ServerContext* context,
+                                   ServerAsyncStreamingInterface* stream,
+                                   CompletionQueue* call_cq,
+                                   ServerCompletionQueue* notification_cq,
+                                   void* tag) {
+    server_->RequestAsyncCall(methods_[index].get(), context, stream, call_cq,
+                              notification_cq, tag);
+  }
+  template <class Message>
+  void RequestAsyncServerStreaming(int index, ServerContext* context,
+                                   Message* request,
+                                   ServerAsyncStreamingInterface* stream,
+                                   CompletionQueue* call_cq,
+                                   ServerCompletionQueue* notification_cq,
+                                   void* tag) {
+    server_->RequestAsyncCall(methods_[index].get(), context, stream, call_cq,
+                              notification_cq, tag, request);
+  }
+  void RequestAsyncBidiStreaming(int index, ServerContext* context,
+                                 ServerAsyncStreamingInterface* stream,
+                                 CompletionQueue* call_cq,
+                                 ServerCompletionQueue* notification_cq,
+                                 void* tag) {
+    server_->RequestAsyncCall(methods_[index].get(), context, stream, call_cq,
+                              notification_cq, tag);
+  }
+
+  void AddMethod(RpcServiceMethod* method) { methods_.emplace_back(method); }
+
+  void MarkMethodAsync(int index) {
+    if (methods_[index].get() == nullptr) {
+      gpr_log(GPR_ERROR,
+              "Cannot mark the method as 'async' because it has already been "
+              "marked as 'generic'.");
+      return;
+    }
+    methods_[index]->ResetHandler();
+  }
+
+  void MarkMethodGeneric(int index) {
+    if (methods_[index]->handler() == nullptr) {
+      gpr_log(GPR_ERROR,
+              "Cannot mark the method as 'generic' because it has already been "
+              "marked as 'async'.");
+    }
+    methods_[index].reset();
+  }
+
+ private:
+  friend class Server;
+  friend class ServerInterface;
+  ServerInterface* server_;
+  std::vector<std::unique_ptr<RpcServiceMethod>> methods_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SERVICE_TYPE_H
diff --git a/include/grpc++/impl/codegen/status.h b/include/grpc++/impl/codegen/status.h
new file mode 100644
index 0000000000000000000000000000000000000000..a509d311d4250e29b4826b322c04aa2982b57bce
--- /dev/null
+++ b/include/grpc++/impl/codegen/status.h
@@ -0,0 +1,76 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_STATUS_H
+#define GRPCXX_IMPL_CODEGEN_STATUS_H
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/status_code_enum.h>
+
+namespace grpc {
+
+/// Did it work? If it didn't, why?
+///
+/// See \a grpc::StatusCode for details on the available code and their meaning.
+class Status {
+ public:
+  /// Construct an OK instance.
+  Status() : code_(StatusCode::OK) {}
+
+  /// Construct an instance with associated \a code and \a details (also
+  // referred to as "error_message").
+  Status(StatusCode code, const grpc::string& details)
+      : code_(code), details_(details) {}
+
+  // Pre-defined special status objects.
+  /// An OK pre-defined instance.
+  static const Status& OK;
+  /// A CANCELLED pre-defined instance.
+  static const Status& CANCELLED;
+
+  /// Return the instance's error code.
+  StatusCode error_code() const { return code_; }
+  /// Return the instance's error message.
+  grpc::string error_message() const { return details_; }
+
+  /// Is the status OK?
+  bool ok() const { return code_ == StatusCode::OK; }
+
+ private:
+  StatusCode code_;
+  grpc::string details_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_STATUS_H
diff --git a/include/grpc++/impl/codegen/status_code_enum.h b/include/grpc++/impl/codegen/status_code_enum.h
new file mode 100644
index 0000000000000000000000000000000000000000..9a90a18e2a53305eab91737d757a605b89f0ad2f
--- /dev/null
+++ b/include/grpc++/impl/codegen/status_code_enum.h
@@ -0,0 +1,152 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
+#define GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
+
+namespace grpc {
+
+enum StatusCode {
+  /// Not an error; returned on success.
+  OK = 0,
+
+  /// The operation was cancelled (typically by the caller).
+  CANCELLED = 1,
+
+  /// Unknown error. An example of where this error may be returned is if a
+  /// Status value received from another address space belongs to an error-space
+  /// that is not known in this address space. Also errors raised by APIs that
+  /// do not return enough error information may be converted to this error.
+  UNKNOWN = 2,
+
+  /// Client specified an invalid argument. Note that this differs from
+  /// FAILED_PRECONDITION. INVALID_ARGUMENT indicates arguments that are
+  /// problematic regardless of the state of the system (e.g., a malformed file
+  /// name).
+  INVALID_ARGUMENT = 3,
+
+  /// Deadline expired before operation could complete. For operations that
+  /// change the state of the system, this error may be returned even if the
+  /// operation has completed successfully. For example, a successful response
+  /// from a server could have been delayed long enough for the deadline to
+  /// expire.
+  DEADLINE_EXCEEDED = 4,
+
+  /// Some requested entity (e.g., file or directory) was not found.
+  NOT_FOUND = 5,
+
+  /// Some entity that we attempted to create (e.g., file or directory) already
+  /// exists.
+  ALREADY_EXISTS = 6,
+
+  /// The caller does not have permission to execute the specified operation.
+  /// PERMISSION_DENIED must not be used for rejections caused by exhausting
+  /// some resource (use RESOURCE_EXHAUSTED instead for those errors).
+  /// PERMISSION_DENIED must not be used if the caller can not be identified
+  /// (use UNAUTHENTICATED instead for those errors).
+  PERMISSION_DENIED = 7,
+
+  /// The request does not have valid authentication credentials for the
+  /// operation.
+  UNAUTHENTICATED = 16,
+
+  /// Some resource has been exhausted, perhaps a per-user quota, or perhaps the
+  /// entire file system is out of space.
+  RESOURCE_EXHAUSTED = 8,
+
+  /// Operation was rejected because the system is not in a state required for
+  /// the operation's execution. For example, directory to be deleted may be
+  /// non-empty, an rmdir operation is applied to a non-directory, etc.
+  ///
+  /// A litmus test that may help a service implementor in deciding
+  /// between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
+  ///  (a) Use UNAVAILABLE if the client can retry just the failing call.
+  ///  (b) Use ABORTED if the client should retry at a higher-level
+  ///      (e.g., restarting a read-modify-write sequence).
+  ///  (c) Use FAILED_PRECONDITION if the client should not retry until
+  ///      the system state has been explicitly fixed. E.g., if an "rmdir"
+  ///      fails because the directory is non-empty, FAILED_PRECONDITION
+  ///      should be returned since the client should not retry unless
+  ///      they have first fixed up the directory by deleting files from it.
+  ///  (d) Use FAILED_PRECONDITION if the client performs conditional
+  ///      REST Get/Update/Delete on a resource and the resource on the
+  ///      server does not match the condition. E.g., conflicting
+  ///      read-modify-write on the same resource.
+  FAILED_PRECONDITION = 9,
+
+  /// The operation was aborted, typically due to a concurrency issue like
+  /// sequencer check failures, transaction aborts, etc.
+  ///
+  /// See litmus test above for deciding between FAILED_PRECONDITION, ABORTED,
+  /// and UNAVAILABLE.
+  ABORTED = 10,
+
+  /// Operation was attempted past the valid range. E.g., seeking or reading
+  /// past end of file.
+  ///
+  /// Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed
+  /// if the system state changes. For example, a 32-bit file system will
+  /// generate INVALID_ARGUMENT if asked to read at an offset that is not in the
+  /// range [0,2^32-1], but it will generate OUT_OF_RANGE if asked to read from
+  /// an offset past the current file size.
+  ///
+  /// There is a fair bit of overlap between FAILED_PRECONDITION and
+  /// OUT_OF_RANGE. We recommend using OUT_OF_RANGE (the more specific error)
+  /// when it applies so that callers who are iterating through a space can
+  /// easily look for an OUT_OF_RANGE error to detect when they are done.
+  OUT_OF_RANGE = 11,
+
+  /// Operation is not implemented or not supported/enabled in this service.
+  UNIMPLEMENTED = 12,
+
+  /// Internal errors. Means some invariants expected by underlying System has
+  /// been broken. If you see one of these errors, Something is very broken.
+  INTERNAL = 13,
+
+  /// The service is currently unavailable. This is a most likely a transient
+  /// condition and may be corrected by retrying with a backoff.
+  ///
+  /// See litmus test above for deciding between FAILED_PRECONDITION, ABORTED,
+  /// and UNAVAILABLE.
+  UNAVAILABLE = 14,
+
+  /// Unrecoverable data loss or corruption.
+  DATA_LOSS = 15,
+
+  /// Force users to include a default branch:
+  DO_NOT_USE = -1
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
diff --git a/include/grpc++/impl/codegen/string_ref.h b/include/grpc++/impl/codegen/string_ref.h
new file mode 100644
index 0000000000000000000000000000000000000000..e3af37e0c2aa1d31139c77de9a3e26bec88d8c39
--- /dev/null
+++ b/include/grpc++/impl/codegen/string_ref.h
@@ -0,0 +1,123 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_STRING_REF_H
+#define GRPCXX_IMPL_CODEGEN_STRING_REF_H
+
+#include <iterator>
+#include <iosfwd>
+
+#include <grpc++/impl/codegen/config.h>
+
+namespace grpc {
+
+/// This class is a non owning reference to a string.
+///
+/// It should be a strict subset of the upcoming std::string_ref.
+///
+/// \see http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3442.html
+///
+/// The constexpr is dropped or replaced with const for legacy compiler
+/// compatibility.
+class string_ref {
+ public:
+  // types
+  typedef const char* const_iterator;
+  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
+
+  // constants
+  const static size_t npos;
+
+  // construct/copy.
+  string_ref() : data_(nullptr), length_(0) {}
+  string_ref(const string_ref& other)
+      : data_(other.data_), length_(other.length_) {}
+  string_ref& operator=(const string_ref& rhs);
+  string_ref(const char* s);
+  string_ref(const char* s, size_t l) : data_(s), length_(l) {}
+  string_ref(const grpc::string& s) : data_(s.data()), length_(s.length()) {}
+
+  // iterators
+  const_iterator begin() const { return data_; }
+  const_iterator end() const { return data_ + length_; }
+  const_iterator cbegin() const { return data_; }
+  const_iterator cend() const { return data_ + length_; }
+  const_reverse_iterator rbegin() const {
+    return const_reverse_iterator(end());
+  }
+  const_reverse_iterator rend() const {
+    return const_reverse_iterator(begin());
+  }
+  const_reverse_iterator crbegin() const {
+    return const_reverse_iterator(end());
+  }
+  const_reverse_iterator crend() const {
+    return const_reverse_iterator(begin());
+  }
+
+  // capacity
+  size_t size() const { return length_; }
+  size_t length() const { return length_; }
+  size_t max_size() const { return length_; }
+  bool empty() const { return length_ == 0; }
+
+  // element access
+  const char* data() const { return data_; }
+
+  // string operations
+  int compare(string_ref x) const;
+  bool starts_with(string_ref x) const;
+  bool ends_with(string_ref x) const;
+  size_t find(string_ref s) const;
+  size_t find(char c) const;
+
+  string_ref substr(size_t pos, size_t n = npos) const;
+
+ private:
+  const char* data_;
+  size_t length_;
+};
+
+// Comparison operators
+bool operator==(string_ref x, string_ref y);
+bool operator!=(string_ref x, string_ref y);
+bool operator<(string_ref x, string_ref y);
+bool operator>(string_ref x, string_ref y);
+bool operator<=(string_ref x, string_ref y);
+bool operator>=(string_ref x, string_ref y);
+
+std::ostream& operator<<(std::ostream& stream, const string_ref& string);
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_STRING_REF_H
diff --git a/include/grpc++/impl/codegen/stub_options.h b/include/grpc++/impl/codegen/stub_options.h
new file mode 100644
index 0000000000000000000000000000000000000000..3912ae2bf9221a570b38748797f1807e198b2ab0
--- /dev/null
+++ b/include/grpc++/impl/codegen/stub_options.h
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_STUB_OPTIONS_H
+#define GRPCXX_IMPL_CODEGEN_STUB_OPTIONS_H
+
+namespace grpc {
+
+class StubOptions {};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_STUB_OPTIONS_H
diff --git a/include/grpc++/impl/codegen/sync.h b/include/grpc++/impl/codegen/sync.h
new file mode 100644
index 0000000000000000000000000000000000000000..375af1543b882787a2ad630e0a893c4286f83e89
--- /dev/null
+++ b/include/grpc++/impl/codegen/sync.h
@@ -0,0 +1,45 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SYNC_H
+#define GRPCXX_IMPL_CODEGEN_SYNC_H
+
+#include <grpc++/impl/codegen/config.h>
+
+#ifdef GRPC_CXX0X_NO_THREAD
+#include <grpc++/impl/codegen/sync_no_cxx11.h>
+#else
+#include <grpc++/impl/codegen/sync_cxx11.h>
+#endif
+
+#endif  // GRPCXX_IMPL_CODEGEN_SYNC_H
diff --git a/include/grpc++/impl/codegen/sync_cxx11.h b/include/grpc++/impl/codegen/sync_cxx11.h
new file mode 100644
index 0000000000000000000000000000000000000000..49105476473e9d5a4e6b161b1e8132583f5d8800
--- /dev/null
+++ b/include/grpc++/impl/codegen/sync_cxx11.h
@@ -0,0 +1,49 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SYNC_CXX11_H
+#define GRPCXX_IMPL_CODEGEN_SYNC_CXX11_H
+
+#include <condition_variable>
+#include <mutex>
+
+namespace grpc {
+
+using std::condition_variable;
+using std::mutex;
+using std::lock_guard;
+using std::unique_lock;
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SYNC_CXX11_H
diff --git a/include/grpc++/impl/codegen/sync_no_cxx11.h b/include/grpc++/impl/codegen/sync_no_cxx11.h
new file mode 100644
index 0000000000000000000000000000000000000000..8dea84736719beddfc13486da27abfcfc5edfe2b
--- /dev/null
+++ b/include/grpc++/impl/codegen/sync_no_cxx11.h
@@ -0,0 +1,105 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H
+#define GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H
+
+#include <grpc/impl/codegen/sync.h>
+
+namespace grpc {
+
+template <class mutex>
+class lock_guard;
+class condition_variable;
+
+class mutex {
+ public:
+  mutex() { gpr_mu_init(&mu_); }
+  ~mutex() { gpr_mu_destroy(&mu_); }
+
+ private:
+  ::gpr_mu mu_;
+  template <class mutex>
+  friend class lock_guard;
+  friend class condition_variable;
+};
+
+template <class mutex>
+class lock_guard {
+ public:
+  lock_guard(mutex &mu) : mu_(mu), locked(true) { gpr_mu_lock(&mu.mu_); }
+  ~lock_guard() { unlock_internal(); }
+
+ protected:
+  void lock_internal() {
+    if (!locked) gpr_mu_lock(&mu_.mu_);
+    locked = true;
+  }
+  void unlock_internal() {
+    if (locked) gpr_mu_unlock(&mu_.mu_);
+    locked = false;
+  }
+
+ private:
+  mutex &mu_;
+  bool locked;
+  friend class condition_variable;
+};
+
+template <class mutex>
+class unique_lock : public lock_guard<mutex> {
+ public:
+  unique_lock(mutex &mu) : lock_guard<mutex>(mu) {}
+  void lock() { this->lock_internal(); }
+  void unlock() { this->unlock_internal(); }
+};
+
+class condition_variable {
+ public:
+  condition_variable() { gpr_cv_init(&cv_); }
+  ~condition_variable() { gpr_cv_destroy(&cv_); }
+  void wait(lock_guard<mutex> &mu) {
+    mu.locked = false;
+    gpr_cv_wait(&cv_, &mu.mu_.mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+    mu.locked = true;
+  }
+  void notify_one() { gpr_cv_signal(&cv_); }
+  void notify_all() { gpr_cv_broadcast(&cv_); }
+
+ private:
+  gpr_cv cv_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
new file mode 100644
index 0000000000000000000000000000000000000000..33d25e837c677f70a1d4b22365ec3e4aa36066c0
--- /dev/null
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -0,0 +1,415 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_SYNC_STREAM_H
+#define GRPCXX_IMPL_CODEGEN_SYNC_STREAM_H
+
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/client_context.h>
+#include <grpc++/impl/codegen/completion_queue.h>
+#include <grpc++/impl/codegen/server_context.h>
+#include <grpc++/impl/codegen/service_type.h>
+#include <grpc++/impl/codegen/status.h>
+#include <grpc/impl/codegen/log.h>
+
+namespace grpc {
+
+/// Common interface for all synchronous client side streaming.
+class ClientStreamingInterface {
+ public:
+  virtual ~ClientStreamingInterface() {}
+
+  /// Wait until the stream finishes, and return the final status. When the
+  /// client side declares it has no more message to send, either implicitly or
+  /// by calling \a WritesDone(), it needs to make sure there is no more message
+  /// to be received from the server, either implicitly or by getting a false
+  /// from a \a Read().
+  ///
+  /// This function will return either:
+  /// - when all incoming messages have been read and the server has returned
+  ///   status.
+  /// - OR when the server has returned a non-OK status.
+  virtual Status Finish() = 0;
+};
+
+/// An interface that yields a sequence of messages of type \a R.
+template <class R>
+class ReaderInterface {
+ public:
+  virtual ~ReaderInterface() {}
+
+  /// Blocking read a message and parse to \a msg. Returns \a true on success.
+  ///
+  /// \param[out] msg The read message.
+  ///
+  /// \return \a false when there will be no more incoming messages, either
+  /// because the other side has called \a WritesDone() or the stream has failed
+  /// (or been cancelled).
+  virtual bool Read(R* msg) = 0;
+};
+
+/// An interface that can be fed a sequence of messages of type \a W.
+template <class W>
+class WriterInterface {
+ public:
+  virtual ~WriterInterface() {}
+
+  /// Blocking write \a msg to the stream with options.
+  ///
+  /// \param msg The message to be written to the stream.
+  /// \param options Options affecting the write operation.
+  ///
+  /// \return \a true on success, \a false when the stream has been closed.
+  virtual bool Write(const W& msg, const WriteOptions& options) = 0;
+
+  /// Blocking write \a msg to the stream with default options.
+  ///
+  /// \param msg The message to be written to the stream.
+  ///
+  /// \return \a true on success, \a false when the stream has been closed.
+  inline bool Write(const W& msg) { return Write(msg, WriteOptions()); }
+};
+
+/// Client-side interface for streaming reads of message of type \a R.
+template <class R>
+class ClientReaderInterface : public ClientStreamingInterface,
+                              public ReaderInterface<R> {
+ public:
+  /// Blocking wait for initial metadata from server. The received metadata
+  /// can only be accessed after this call returns. Should only be called before
+  /// the first read. Calling this method is optional, and if it is not called
+  /// the metadata will be available in ClientContext after the first read.
+  virtual void WaitForInitialMetadata() = 0;
+};
+
+template <class R>
+class ClientReader GRPC_FINAL : public ClientReaderInterface<R> {
+ public:
+  /// Blocking create a stream and write the first request out.
+  template <class W>
+  ClientReader(ChannelInterface* channel, const RpcMethod& method,
+               ClientContext* context, const W& request)
+      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
+    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+              CallOpClientSendClose> ops;
+    ops.SendInitialMetadata(context->send_initial_metadata_);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(ops.SendMessage(request).ok());
+    ops.ClientSendClose();
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);
+  }
+
+  void WaitForInitialMetadata() GRPC_OVERRIDE {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    CallOpSet<CallOpRecvInitialMetadata> ops;
+    ops.RecvInitialMetadata(context_);
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);  /// status ignored
+  }
+
+  bool Read(R* msg) GRPC_OVERRIDE {
+    CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
+    if (!context_->initial_metadata_received_) {
+      ops.RecvInitialMetadata(context_);
+    }
+    ops.RecvMessage(msg);
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops) && ops.got_message;
+  }
+
+  Status Finish() GRPC_OVERRIDE {
+    CallOpSet<CallOpClientRecvStatus> ops;
+    Status status;
+    ops.ClientRecvStatus(context_, &status);
+    call_.PerformOps(&ops);
+    GPR_ASSERT(cq_.Pluck(&ops));
+    return status;
+  }
+
+ private:
+  ClientContext* context_;
+  CompletionQueue cq_;
+  Call call_;
+};
+
+/// Client-side interface for streaming writes of message of type \a W.
+template <class W>
+class ClientWriterInterface : public ClientStreamingInterface,
+                              public WriterInterface<W> {
+ public:
+  /// Half close writing from the client.
+  /// Block until writes are completed.
+  ///
+  /// \return Whether the writes were successful.
+  virtual bool WritesDone() = 0;
+};
+
+template <class W>
+class ClientWriter : public ClientWriterInterface<W> {
+ public:
+  /// Blocking create a stream.
+  template <class R>
+  ClientWriter(ChannelInterface* channel, const RpcMethod& method,
+               ClientContext* context, R* response)
+      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
+    finish_ops_.RecvMessage(response);
+
+    CallOpSet<CallOpSendInitialMetadata> ops;
+    ops.SendInitialMetadata(context->send_initial_metadata_);
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);
+  }
+
+  using WriterInterface<W>::Write;
+  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
+    CallOpSet<CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg, options).ok()) {
+      return false;
+    }
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops);
+  }
+
+  bool WritesDone() GRPC_OVERRIDE {
+    CallOpSet<CallOpClientSendClose> ops;
+    ops.ClientSendClose();
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops);
+  }
+
+  /// Read the final response and wait for the final status.
+  Status Finish() GRPC_OVERRIDE {
+    Status status;
+    finish_ops_.ClientRecvStatus(context_, &status);
+    call_.PerformOps(&finish_ops_);
+    GPR_ASSERT(cq_.Pluck(&finish_ops_));
+    return status;
+  }
+
+ private:
+  ClientContext* context_;
+  CallOpSet<CallOpGenericRecvMessage, CallOpClientRecvStatus> finish_ops_;
+  CompletionQueue cq_;
+  Call call_;
+};
+
+/// Client-side interface for bi-directional streaming.
+template <class W, class R>
+class ClientReaderWriterInterface : public ClientStreamingInterface,
+                                    public WriterInterface<W>,
+                                    public ReaderInterface<R> {
+ public:
+  /// Blocking wait for initial metadata from server. The received metadata
+  /// can only be accessed after this call returns. Should only be called before
+  /// the first read. Calling this method is optional, and if it is not called
+  /// the metadata will be available in ClientContext after the first read.
+  virtual void WaitForInitialMetadata() = 0;
+
+  /// Block until writes are completed.
+  ///
+  /// \return Whether the writes were successful.
+  virtual bool WritesDone() = 0;
+};
+
+template <class W, class R>
+class ClientReaderWriter GRPC_FINAL : public ClientReaderWriterInterface<W, R> {
+ public:
+  /// Blocking create a stream.
+  ClientReaderWriter(ChannelInterface* channel, const RpcMethod& method,
+                     ClientContext* context)
+      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
+    CallOpSet<CallOpSendInitialMetadata> ops;
+    ops.SendInitialMetadata(context->send_initial_metadata_);
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);
+  }
+
+  void WaitForInitialMetadata() GRPC_OVERRIDE {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    CallOpSet<CallOpRecvInitialMetadata> ops;
+    ops.RecvInitialMetadata(context_);
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);  // status ignored
+  }
+
+  bool Read(R* msg) GRPC_OVERRIDE {
+    CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
+    if (!context_->initial_metadata_received_) {
+      ops.RecvInitialMetadata(context_);
+    }
+    ops.RecvMessage(msg);
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops) && ops.got_message;
+  }
+
+  using WriterInterface<W>::Write;
+  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
+    CallOpSet<CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg, options).ok()) return false;
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops);
+  }
+
+  bool WritesDone() GRPC_OVERRIDE {
+    CallOpSet<CallOpClientSendClose> ops;
+    ops.ClientSendClose();
+    call_.PerformOps(&ops);
+    return cq_.Pluck(&ops);
+  }
+
+  Status Finish() GRPC_OVERRIDE {
+    CallOpSet<CallOpClientRecvStatus> ops;
+    Status status;
+    ops.ClientRecvStatus(context_, &status);
+    call_.PerformOps(&ops);
+    GPR_ASSERT(cq_.Pluck(&ops));
+    return status;
+  }
+
+ private:
+  ClientContext* context_;
+  CompletionQueue cq_;
+  Call call_;
+};
+
+template <class R>
+class ServerReader GRPC_FINAL : public ReaderInterface<R> {
+ public:
+  ServerReader(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
+
+  void SendInitialMetadata() {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    CallOpSet<CallOpSendInitialMetadata> ops;
+    ops.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_->PerformOps(&ops);
+    call_->cq()->Pluck(&ops);
+  }
+
+  bool Read(R* msg) GRPC_OVERRIDE {
+    CallOpSet<CallOpRecvMessage<R>> ops;
+    ops.RecvMessage(msg);
+    call_->PerformOps(&ops);
+    return call_->cq()->Pluck(&ops) && ops.got_message;
+  }
+
+ private:
+  Call* const call_;
+  ServerContext* const ctx_;
+};
+
+template <class W>
+class ServerWriter GRPC_FINAL : public WriterInterface<W> {
+ public:
+  ServerWriter(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
+
+  void SendInitialMetadata() {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    CallOpSet<CallOpSendInitialMetadata> ops;
+    ops.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_->PerformOps(&ops);
+    call_->cq()->Pluck(&ops);
+  }
+
+  using WriterInterface<W>::Write;
+  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
+    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg, options).ok()) {
+      return false;
+    }
+    if (!ctx_->sent_initial_metadata_) {
+      ops.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    call_->PerformOps(&ops);
+    return call_->cq()->Pluck(&ops);
+  }
+
+ private:
+  Call* const call_;
+  ServerContext* const ctx_;
+};
+
+/// Server-side interface for bi-directional streaming.
+template <class W, class R>
+class ServerReaderWriter GRPC_FINAL : public WriterInterface<W>,
+                                      public ReaderInterface<R> {
+ public:
+  ServerReaderWriter(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
+
+  void SendInitialMetadata() {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    CallOpSet<CallOpSendInitialMetadata> ops;
+    ops.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_->PerformOps(&ops);
+    call_->cq()->Pluck(&ops);
+  }
+
+  bool Read(R* msg) GRPC_OVERRIDE {
+    CallOpSet<CallOpRecvMessage<R>> ops;
+    ops.RecvMessage(msg);
+    call_->PerformOps(&ops);
+    return call_->cq()->Pluck(&ops) && ops.got_message;
+  }
+
+  using WriterInterface<W>::Write;
+  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
+    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg, options).ok()) {
+      return false;
+    }
+    if (!ctx_->sent_initial_metadata_) {
+      ops.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    call_->PerformOps(&ops);
+    return call_->cq()->Pluck(&ops);
+  }
+
+ private:
+  Call* const call_;
+  ServerContext* const ctx_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_SYNC_STREAM_H
diff --git a/include/grpc++/impl/codegen/time.h b/include/grpc++/impl/codegen/time.h
new file mode 100644
index 0000000000000000000000000000000000000000..bed7423341258b8b6bcee8aa32ae56e5ad304fd0
--- /dev/null
+++ b/include/grpc++/impl/codegen/time.h
@@ -0,0 +1,111 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_TIME_H
+#define GRPCXX_IMPL_CODEGEN_TIME_H
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc/impl/codegen/time.h>
+
+namespace grpc {
+
+/* If you are trying to use CompletionQueue::AsyncNext with a time class that
+   isn't either gpr_timespec or std::chrono::system_clock::time_point, you
+   will most likely be looking at this comment as your compiler will have
+   fired an error below. In order to fix this issue, you have two potential
+   solutions:
+
+     1. Use gpr_timespec or std::chrono::system_clock::time_point instead
+     2. Specialize the TimePoint class with whichever time class that you
+        want to use here. See below for two examples of how to do this.
+ */
+
+template <typename T>
+class TimePoint {
+ public:
+  TimePoint(const T& time) { you_need_a_specialization_of_TimePoint(); }
+  gpr_timespec raw_time() {
+    gpr_timespec t;
+    return t;
+  }
+
+ private:
+  void you_need_a_specialization_of_TimePoint();
+};
+
+template <>
+class TimePoint<gpr_timespec> {
+ public:
+  TimePoint(const gpr_timespec& time) : time_(time) {}
+  gpr_timespec raw_time() { return time_; }
+
+ private:
+  gpr_timespec time_;
+};
+
+}  // namespace grpc
+
+#ifndef GRPC_CXX0X_NO_CHRONO
+
+#include <chrono>
+
+#include <grpc/impl/codegen/time.h>
+
+namespace grpc {
+
+// from and to should be absolute time.
+void Timepoint2Timespec(const std::chrono::system_clock::time_point& from,
+                        gpr_timespec* to);
+void TimepointHR2Timespec(
+    const std::chrono::high_resolution_clock::time_point& from,
+    gpr_timespec* to);
+
+std::chrono::system_clock::time_point Timespec2Timepoint(gpr_timespec t);
+
+template <>
+class TimePoint<std::chrono::system_clock::time_point> {
+ public:
+  TimePoint(const std::chrono::system_clock::time_point& time) {
+    Timepoint2Timespec(time, &time_);
+  }
+  gpr_timespec raw_time() const { return time_; }
+
+ private:
+  gpr_timespec time_;
+};
+
+}  // namespace grpc
+
+#endif  // !GRPC_CXX0X_NO_CHRONO
+
+#endif  // GRPCXX_IMPL_CODEGEN_TIME_H
diff --git a/include/grpc++/impl/grpc_library.h b/include/grpc++/impl/grpc_library.h
index ce4211418dda6ee670ae80c42287a2712a7c3dab..e8a075f5ebb1ced56223723edfcd59a11030811d 100644
--- a/include/grpc++/impl/grpc_library.h
+++ b/include/grpc++/impl/grpc_library.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,16 +34,34 @@
 #ifndef GRPCXX_IMPL_GRPC_LIBRARY_H
 #define GRPCXX_IMPL_GRPC_LIBRARY_H
 
+#include <iostream>
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/grpc_library.h>
 #include <grpc/grpc.h>
 
 namespace grpc {
 
-class GrpcLibrary {
+namespace internal {
+class GrpcLibrary GRPC_FINAL : public GrpcLibraryInterface {
  public:
-  GrpcLibrary() { grpc_init(); }
-  virtual ~GrpcLibrary() { grpc_shutdown(); }
+  void init() GRPC_OVERRIDE { grpc_init(); }
+
+  void shutdown() GRPC_OVERRIDE { grpc_shutdown(); }
+};
+
+static GrpcLibrary g_gli;
+
+class GrpcLibraryInitializer GRPC_FINAL {
+ public:
+  GrpcLibraryInitializer() { grpc::g_glip = &g_gli; }
+
+  /// A no-op method to force the linker to reference this class, which will
+  /// take care of initializing and shutting down the gRPC runtime.
+  int summon() { return 0; }
 };
 
+}  // namespace internal
 }  // namespace grpc
 
 #endif  // GRPCXX_IMPL_GRPC_LIBRARY_H
diff --git a/include/grpc++/impl/method_handler_impl.h b/include/grpc++/impl/method_handler_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..305fd2865e484791d6be127e449ac6626a6b8db0
--- /dev/null
+++ b/include/grpc++/impl/method_handler_impl.h
@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_METHOD_HANDLER_IMPL_H
+#define GRPCXX_IMPL_METHOD_HANDLER_IMPL_H
+
+#include <grpc++/impl/codegen/method_handler_impl.h>
+
+#endif  // GRPCXX_IMPL_METHOD_HANDLER_IMPL_H
diff --git a/include/grpc++/impl/proto_utils.h b/include/grpc++/impl/proto_utils.h
index 283e33486df474472e36fb98b99ce0d7f50555d6..9124001e207f0f8b9629de3464166a81044e93d0 100644
--- a/include/grpc++/impl/proto_utils.h
+++ b/include/grpc++/impl/proto_utils.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,43 +34,6 @@
 #ifndef GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
 #define GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
 
-#include <type_traits>
-
-#include <grpc/grpc.h>
-#include <grpc++/impl/serialization_traits.h>
-#include <grpc++/support/config_protobuf.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-// Serialize the msg into a buffer created inside the function. The caller
-// should destroy the returned buffer when done with it. If serialization fails,
-// false is returned and buffer is left unchanged.
-Status SerializeProto(const grpc::protobuf::Message& msg,
-                      grpc_byte_buffer** buffer);
-
-// The caller keeps ownership of buffer and msg.
-Status DeserializeProto(grpc_byte_buffer* buffer, grpc::protobuf::Message* msg,
-                        int max_message_size);
-
-template <class T>
-class SerializationTraits<T, typename std::enable_if<std::is_base_of<
-                                 grpc::protobuf::Message, T>::value>::type> {
- public:
-  static Status Serialize(const grpc::protobuf::Message& msg,
-                          grpc_byte_buffer** buffer, bool* own_buffer) {
-    *own_buffer = true;
-    return SerializeProto(msg, buffer);
-  }
-  static Status Deserialize(grpc_byte_buffer* buffer,
-                            grpc::protobuf::Message* msg,
-                            int max_message_size) {
-    auto status = DeserializeProto(buffer, msg, max_message_size);
-    grpc_byte_buffer_destroy(buffer);
-    return status;
-  }
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/proto_utils.h>
 
 #endif  // GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
diff --git a/include/grpc++/impl/rpc_method.h b/include/grpc++/impl/rpc_method.h
index 9800268062626690fdc98c5ff3a9c2592b0dc2d0..8b5d1a32822903c5bf755ed249329332cd7cee75 100644
--- a/include/grpc++/impl/rpc_method.h
+++ b/include/grpc++/impl/rpc_method.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,40 +34,6 @@
 #ifndef GRPCXX_IMPL_RPC_METHOD_H
 #define GRPCXX_IMPL_RPC_METHOD_H
 
-#include <memory>
-
-#include <grpc++/channel.h>
-
-namespace grpc {
-
-class RpcMethod {
- public:
-  enum RpcType {
-    NORMAL_RPC = 0,
-    CLIENT_STREAMING,  // request streaming
-    SERVER_STREAMING,  // response streaming
-    BIDI_STREAMING
-  };
-
-  RpcMethod(const char* name, RpcType type)
-      : name_(name), method_type_(type), channel_tag_(NULL) {}
-
-  RpcMethod(const char* name, RpcType type,
-            const std::shared_ptr<Channel>& channel)
-      : name_(name),
-        method_type_(type),
-        channel_tag_(channel->RegisterMethod(name)) {}
-
-  const char* name() const { return name_; }
-  RpcType method_type() const { return method_type_; }
-  void* channel_tag() const { return channel_tag_; }
-
- private:
-  const char* const name_;
-  const RpcType method_type_;
-  void* const channel_tag_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/rpc_method.h>
 
 #endif  // GRPCXX_IMPL_RPC_METHOD_H
diff --git a/include/grpc++/impl/rpc_service_method.h b/include/grpc++/impl/rpc_service_method.h
index b203c8f53ae281c0ded0ae5a5c3d1291bb88fef5..101e6a636b1a7e9dd2103c02a473bd2d40ba212f 100644
--- a/include/grpc++/impl/rpc_service_method.h
+++ b/include/grpc++/impl/rpc_service_method.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,234 +34,6 @@
 #ifndef GRPCXX_IMPL_RPC_SERVICE_METHOD_H
 #define GRPCXX_IMPL_RPC_SERVICE_METHOD_H
 
-#include <climits>
-#include <functional>
-#include <map>
-#include <memory>
-#include <vector>
-
-#include <grpc++/impl/rpc_method.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/status.h>
-#include <grpc++/support/sync_stream.h>
-
-namespace grpc {
-class ServerContext;
-class StreamContextInterface;
-
-// TODO(rocking): we might need to split this file into multiple ones.
-
-// Base class for running an RPC handler.
-class MethodHandler {
- public:
-  virtual ~MethodHandler() {}
-  struct HandlerParameter {
-    HandlerParameter(Call* c, ServerContext* context, grpc_byte_buffer* req,
-                     int max_size)
-        : call(c),
-          server_context(context),
-          request(req),
-          max_message_size(max_size) {}
-    Call* call;
-    ServerContext* server_context;
-    // Handler required to grpc_byte_buffer_destroy this
-    grpc_byte_buffer* request;
-    int max_message_size;
-  };
-  virtual void RunHandler(const HandlerParameter& param) = 0;
-};
-
-// A wrapper class of an application provided rpc method handler.
-template <class ServiceType, class RequestType, class ResponseType>
-class RpcMethodHandler : public MethodHandler {
- public:
-  RpcMethodHandler(
-      std::function<Status(ServiceType*, ServerContext*, const RequestType*,
-                           ResponseType*)> func,
-      ServiceType* service)
-      : func_(func), service_(service) {}
-
-  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
-    RequestType req;
-    Status status = SerializationTraits<RequestType>::Deserialize(
-        param.request, &req, param.max_message_size);
-    ResponseType rsp;
-    if (status.ok()) {
-      status = func_(service_, param.server_context, &req, &rsp);
-    }
-
-    GPR_ASSERT(!param.server_context->sent_initial_metadata_);
-    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-              CallOpServerSendStatus> ops;
-    ops.SendInitialMetadata(param.server_context->initial_metadata_);
-    if (status.ok()) {
-      status = ops.SendMessage(rsp);
-    }
-    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
-    param.call->PerformOps(&ops);
-    param.call->cq()->Pluck(&ops);
-  }
-
- private:
-  // Application provided rpc handler function.
-  std::function<Status(ServiceType*, ServerContext*, const RequestType*,
-                       ResponseType*)> func_;
-  // The class the above handler function lives in.
-  ServiceType* service_;
-};
-
-// A wrapper class of an application provided client streaming handler.
-template <class ServiceType, class RequestType, class ResponseType>
-class ClientStreamingHandler : public MethodHandler {
- public:
-  ClientStreamingHandler(
-      std::function<Status(ServiceType*, ServerContext*,
-                           ServerReader<RequestType>*, ResponseType*)> func,
-      ServiceType* service)
-      : func_(func), service_(service) {}
-
-  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
-    ServerReader<RequestType> reader(param.call, param.server_context);
-    ResponseType rsp;
-    Status status = func_(service_, param.server_context, &reader, &rsp);
-
-    GPR_ASSERT(!param.server_context->sent_initial_metadata_);
-    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-              CallOpServerSendStatus> ops;
-    ops.SendInitialMetadata(param.server_context->initial_metadata_);
-    if (status.ok()) {
-      status = ops.SendMessage(rsp);
-    }
-    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
-    param.call->PerformOps(&ops);
-    param.call->cq()->Pluck(&ops);
-  }
-
- private:
-  std::function<Status(ServiceType*, ServerContext*, ServerReader<RequestType>*,
-                       ResponseType*)> func_;
-  ServiceType* service_;
-};
-
-// A wrapper class of an application provided server streaming handler.
-template <class ServiceType, class RequestType, class ResponseType>
-class ServerStreamingHandler : public MethodHandler {
- public:
-  ServerStreamingHandler(
-      std::function<Status(ServiceType*, ServerContext*, const RequestType*,
-                           ServerWriter<ResponseType>*)> func,
-      ServiceType* service)
-      : func_(func), service_(service) {}
-
-  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
-    RequestType req;
-    Status status = SerializationTraits<RequestType>::Deserialize(
-        param.request, &req, param.max_message_size);
-
-    if (status.ok()) {
-      ServerWriter<ResponseType> writer(param.call, param.server_context);
-      status = func_(service_, param.server_context, &req, &writer);
-    }
-
-    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
-    if (!param.server_context->sent_initial_metadata_) {
-      ops.SendInitialMetadata(param.server_context->initial_metadata_);
-    }
-    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
-    param.call->PerformOps(&ops);
-    param.call->cq()->Pluck(&ops);
-  }
-
- private:
-  std::function<Status(ServiceType*, ServerContext*, const RequestType*,
-                       ServerWriter<ResponseType>*)> func_;
-  ServiceType* service_;
-};
-
-// A wrapper class of an application provided bidi-streaming handler.
-template <class ServiceType, class RequestType, class ResponseType>
-class BidiStreamingHandler : public MethodHandler {
- public:
-  BidiStreamingHandler(
-      std::function<Status(ServiceType*, ServerContext*,
-                           ServerReaderWriter<ResponseType, RequestType>*)>
-          func,
-      ServiceType* service)
-      : func_(func), service_(service) {}
-
-  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
-    ServerReaderWriter<ResponseType, RequestType> stream(param.call,
-                                                         param.server_context);
-    Status status = func_(service_, param.server_context, &stream);
-
-    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
-    if (!param.server_context->sent_initial_metadata_) {
-      ops.SendInitialMetadata(param.server_context->initial_metadata_);
-    }
-    ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
-    param.call->PerformOps(&ops);
-    param.call->cq()->Pluck(&ops);
-  }
-
- private:
-  std::function<Status(ServiceType*, ServerContext*,
-                       ServerReaderWriter<ResponseType, RequestType>*)> func_;
-  ServiceType* service_;
-};
-
-// Handle unknown method by returning UNIMPLEMENTED error.
-class UnknownMethodHandler : public MethodHandler {
- public:
-  template <class T>
-  static void FillOps(ServerContext* context, T* ops) {
-    Status status(StatusCode::UNIMPLEMENTED, "");
-    if (!context->sent_initial_metadata_) {
-      ops->SendInitialMetadata(context->initial_metadata_);
-      context->sent_initial_metadata_ = true;
-    }
-    ops->ServerSendStatus(context->trailing_metadata_, status);
-  }
-
-  void RunHandler(const HandlerParameter& param) GRPC_FINAL {
-    CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> ops;
-    FillOps(param.server_context, &ops);
-    param.call->PerformOps(&ops);
-    param.call->cq()->Pluck(&ops);
-  }
-};
-
-// Server side rpc method class
-class RpcServiceMethod : public RpcMethod {
- public:
-  // Takes ownership of the handler
-  RpcServiceMethod(const char* name, RpcMethod::RpcType type,
-                   MethodHandler* handler)
-      : RpcMethod(name, type), handler_(handler) {}
-
-  MethodHandler* handler() { return handler_.get(); }
-
- private:
-  std::unique_ptr<MethodHandler> handler_;
-};
-
-// This class contains all the method information for an rpc service. It is
-// used for registering a service on a grpc server.
-class RpcService {
- public:
-  // Takes ownership.
-  void AddMethod(RpcServiceMethod* method) { methods_.emplace_back(method); }
-
-  RpcServiceMethod* GetMethod(int i) { return methods_[i].get(); }
-  int GetMethodCount() const {
-    // On win x64, int is only 32bit
-    GPR_ASSERT(methods_.size() <= INT_MAX);
-    return (int)methods_.size();
-  }
-
- private:
-  std::vector<std::unique_ptr<RpcServiceMethod>> methods_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/rpc_service_method.h>
 
 #endif  // GRPCXX_IMPL_RPC_SERVICE_METHOD_H
diff --git a/include/grpc++/impl/serialization_traits.h b/include/grpc++/impl/serialization_traits.h
index 3ea66a34054a0ccb0f1c1f967b074a2debc41e77..fad4398174bbec5bcf609021c763ce8e8d8fe47c 100644
--- a/include/grpc++/impl/serialization_traits.h
+++ b/include/grpc++/impl/serialization_traits.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,35 +34,6 @@
 #ifndef GRPCXX_IMPL_SERIALIZATION_TRAITS_H
 #define GRPCXX_IMPL_SERIALIZATION_TRAITS_H
 
-namespace grpc {
-
-/// Defines how to serialize and deserialize some type.
-///
-/// Used for hooking different message serialization API's into GRPC.
-/// Each SerializationTraits implementation must provide the following
-/// functions:
-///   static Status Serialize(const Message& msg,
-///                           grpc_byte_buffer** buffer,
-//                            bool* own_buffer);
-///   static Status Deserialize(grpc_byte_buffer* buffer,
-///                             Message* msg,
-///                             int max_message_size);
-///
-/// Serialize is required to convert message to a grpc_byte_buffer, and
-/// to store a pointer to that byte buffer at *buffer. *own_buffer should
-/// be set to true if the caller owns said byte buffer, or false if
-/// ownership is retained elsewhere.
-///
-/// Deserialize is required to convert buffer into the message stored at
-/// msg. max_message_size is passed in as a bound on the maximum number of
-/// message bytes Deserialize should accept.
-///
-/// Both functions return a Status, allowing them to explain what went
-/// wrong if required.
-template <class Message,
-          class UnusedButHereForPartialTemplateSpecialization = void>
-class SerializationTraits;
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/serialization_traits.h>
 
 #endif  // GRPCXX_IMPL_SERIALIZATION_TRAITS_H
diff --git a/include/grpc++/impl/service_type.h b/include/grpc++/impl/service_type.h
index 3b6ac1de771f73c0de8fe99afbc9c61c44e542ae..b33fbec739406ddab9d146dc235a7bffa2811866 100644
--- a/include/grpc++/impl/service_type.h
+++ b/include/grpc++/impl/service_type.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,90 +34,6 @@
 #ifndef GRPCXX_IMPL_SERVICE_TYPE_H
 #define GRPCXX_IMPL_SERVICE_TYPE_H
 
-#include <grpc++/impl/serialization_traits.h>
-#include <grpc++/server.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-class Call;
-class CompletionQueue;
-class RpcService;
-class Server;
-class ServerCompletionQueue;
-class ServerContext;
-
-class SynchronousService {
- public:
-  virtual ~SynchronousService() {}
-  virtual RpcService* service() = 0;
-};
-
-class ServerAsyncStreamingInterface {
- public:
-  virtual ~ServerAsyncStreamingInterface() {}
-
-  virtual void SendInitialMetadata(void* tag) = 0;
-
- private:
-  friend class Server;
-  virtual void BindCall(Call* call) = 0;
-};
-
-class AsynchronousService {
- public:
-  AsynchronousService(const char** method_names, size_t method_count)
-      : server_(nullptr),
-        method_names_(method_names),
-        method_count_(method_count),
-        request_args_(nullptr) {}
-
-  ~AsynchronousService() { delete[] request_args_; }
-
- protected:
-  template <class Message>
-  void RequestAsyncUnary(int index, ServerContext* context, Message* request,
-                         ServerAsyncStreamingInterface* stream,
-                         CompletionQueue* call_cq,
-                         ServerCompletionQueue* notification_cq, void* tag) {
-    server_->RequestAsyncCall(request_args_[index], context, stream, call_cq,
-                              notification_cq, tag, request);
-  }
-  void RequestClientStreaming(int index, ServerContext* context,
-                              ServerAsyncStreamingInterface* stream,
-                              CompletionQueue* call_cq,
-                              ServerCompletionQueue* notification_cq,
-                              void* tag) {
-    server_->RequestAsyncCall(request_args_[index], context, stream, call_cq,
-                              notification_cq, tag);
-  }
-  template <class Message>
-  void RequestServerStreaming(int index, ServerContext* context,
-                              Message* request,
-                              ServerAsyncStreamingInterface* stream,
-                              CompletionQueue* call_cq,
-                              ServerCompletionQueue* notification_cq,
-                              void* tag) {
-    server_->RequestAsyncCall(request_args_[index], context, stream, call_cq,
-                              notification_cq, tag, request);
-  }
-  void RequestBidiStreaming(int index, ServerContext* context,
-                            ServerAsyncStreamingInterface* stream,
-                            CompletionQueue* call_cq,
-                            ServerCompletionQueue* notification_cq, void* tag) {
-    server_->RequestAsyncCall(request_args_[index], context, stream, call_cq,
-                              notification_cq, tag);
-  }
-
- private:
-  friend class Server;
-  Server* server_;
-  const char** const method_names_;
-  size_t method_count_;
-  void** request_args_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/service_type.h>
 
 #endif  // GRPCXX_IMPL_SERVICE_TYPE_H
diff --git a/include/grpc++/impl/sync.h b/include/grpc++/impl/sync.h
index 999c4303cbe127dbfa5c7706020f87b82cb7ddab..824139043bcb6310d7c50d510592be44785e75f7 100644
--- a/include/grpc++/impl/sync.h
+++ b/include/grpc++/impl/sync.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,12 +34,6 @@
 #ifndef GRPCXX_IMPL_SYNC_H
 #define GRPCXX_IMPL_SYNC_H
 
-#include <grpc++/support/config.h>
-
-#ifdef GRPC_CXX0X_NO_THREAD
-#include <grpc++/impl/sync_no_cxx11.h>
-#else
-#include <grpc++/impl/sync_cxx11.h>
-#endif
+#include <grpc++/impl/codegen/sync.h>
 
 #endif  // GRPCXX_IMPL_SYNC_H
diff --git a/include/grpc++/impl/sync_cxx11.h b/include/grpc++/impl/sync_cxx11.h
index 4e6f1da3a61f6053c9028e74e7d34d5cf3175e00..22997a19c2ae894754fb00eb70e6afb5ef8b0caf 100644
--- a/include/grpc++/impl/sync_cxx11.h
+++ b/include/grpc++/impl/sync_cxx11.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,16 +34,6 @@
 #ifndef GRPCXX_IMPL_SYNC_CXX11_H
 #define GRPCXX_IMPL_SYNC_CXX11_H
 
-#include <condition_variable>
-#include <mutex>
-
-namespace grpc {
-
-using std::condition_variable;
-using std::mutex;
-using std::lock_guard;
-using std::unique_lock;
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/sync_cxx11.h>
 
 #endif  // GRPCXX_IMPL_SYNC_CXX11_H
diff --git a/include/grpc++/impl/sync_no_cxx11.h b/include/grpc++/impl/sync_no_cxx11.h
index 120a031045281adb8e5401a367d81095c8c8c6cd..def800d6f46c6c90114ef3a3940083238f1e2dcc 100644
--- a/include/grpc++/impl/sync_no_cxx11.h
+++ b/include/grpc++/impl/sync_no_cxx11.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,72 +34,6 @@
 #ifndef GRPCXX_IMPL_SYNC_NO_CXX11_H
 #define GRPCXX_IMPL_SYNC_NO_CXX11_H
 
-#include <grpc/support/sync.h>
-
-namespace grpc {
-
-template <class mutex>
-class lock_guard;
-class condition_variable;
-
-class mutex {
- public:
-  mutex() { gpr_mu_init(&mu_); }
-  ~mutex() { gpr_mu_destroy(&mu_); }
-
- private:
-  ::gpr_mu mu_;
-  template <class mutex>
-  friend class lock_guard;
-  friend class condition_variable;
-};
-
-template <class mutex>
-class lock_guard {
- public:
-  lock_guard(mutex &mu) : mu_(mu), locked(true) { gpr_mu_lock(&mu.mu_); }
-  ~lock_guard() { unlock_internal(); }
-
- protected:
-  void lock_internal() {
-    if (!locked) gpr_mu_lock(&mu_.mu_);
-    locked = true;
-  }
-  void unlock_internal() {
-    if (locked) gpr_mu_unlock(&mu_.mu_);
-    locked = false;
-  }
-
- private:
-  mutex &mu_;
-  bool locked;
-  friend class condition_variable;
-};
-
-template <class mutex>
-class unique_lock : public lock_guard<mutex> {
- public:
-  unique_lock(mutex &mu) : lock_guard<mutex>(mu) {}
-  void lock() { this->lock_internal(); }
-  void unlock() { this->unlock_internal(); }
-};
-
-class condition_variable {
- public:
-  condition_variable() { gpr_cv_init(&cv_); }
-  ~condition_variable() { gpr_cv_destroy(&cv_); }
-  void wait(lock_guard<mutex> &mu) {
-    mu.locked = false;
-    gpr_cv_wait(&cv_, &mu.mu_.mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
-    mu.locked = true;
-  }
-  void notify_one() { gpr_cv_signal(&cv_); }
-  void notify_all() { gpr_cv_broadcast(&cv_); }
-
- private:
-  gpr_cv cv_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/sync_no_cxx11.h>
 
 #endif  // GRPCXX_IMPL_SYNC_NO_CXX11_H
diff --git a/include/grpc++/security/auth_context.h b/include/grpc++/security/auth_context.h
index b924ec90c69d9f90319ad65d4c43d64072eb52d1..bca8fa7c0ccb3562b3a3f7ba90bf3884761077aa 100644
--- a/include/grpc++/security/auth_context.h
+++ b/include/grpc++/security/auth_context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,77 +34,6 @@
 #ifndef GRPCXX_SUPPORT_AUTH_CONTEXT_H
 #define GRPCXX_SUPPORT_AUTH_CONTEXT_H
 
-#include <iterator>
-#include <vector>
-
-#include <grpc++/support/config.h>
-#include <grpc++/support/string_ref.h>
-
-struct grpc_auth_context;
-struct grpc_auth_property;
-struct grpc_auth_property_iterator;
-
-namespace grpc {
-class SecureAuthContext;
-
-typedef std::pair<grpc::string_ref, grpc::string_ref> AuthProperty;
-
-class AuthPropertyIterator
-    : public std::iterator<std::input_iterator_tag, const AuthProperty> {
- public:
-  ~AuthPropertyIterator();
-  AuthPropertyIterator& operator++();
-  AuthPropertyIterator operator++(int);
-  bool operator==(const AuthPropertyIterator& rhs) const;
-  bool operator!=(const AuthPropertyIterator& rhs) const;
-  const AuthProperty operator*();
-
- protected:
-  AuthPropertyIterator();
-  AuthPropertyIterator(const grpc_auth_property* property,
-                       const grpc_auth_property_iterator* iter);
-
- private:
-  friend class SecureAuthContext;
-  const grpc_auth_property* property_;
-  // The following items form a grpc_auth_property_iterator.
-  const grpc_auth_context* ctx_;
-  size_t index_;
-  const char* name_;
-};
-
-/// Class encapsulating the Authentication Information.
-///
-/// It includes the secure identity of the peer, the type of secure transport
-/// used as well as any other properties required by the authorization layer.
-class AuthContext {
- public:
-  virtual ~AuthContext() {}
-
-  /// Returns true if the peer is authenticated.
-  virtual bool IsPeerAuthenticated() const = 0;
-
-  /// A peer identity.
-  ///
-  /// It is, in general, comprised of one or more properties (in which case they
-  /// have the same name).
-  virtual std::vector<grpc::string_ref> GetPeerIdentity() const = 0;
-  virtual grpc::string GetPeerIdentityPropertyName() const = 0;
-
-  /// Returns all the property values with the given name.
-  virtual std::vector<grpc::string_ref> FindPropertyValues(
-      const grpc::string& name) const = 0;
-
-  /// Iteration over all the properties.
-  virtual AuthPropertyIterator begin() const = 0;
-  virtual AuthPropertyIterator end() const = 0;
-
-  // Mutation functions: should only be used by an AuthMetadataProcessor.
-  virtual void AddProperty(const grpc::string& key,
-                           const grpc::string_ref& value) = 0;
-  virtual bool SetPeerIdentityPropertyName(const grpc::string& name) = 0;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/security/auth_context.h>
 
 #endif  // GRPCXX_SUPPORT_AUTH_CONTEXT_H
diff --git a/include/grpc++/security/credentials.h b/include/grpc++/security/credentials.h
index 75945fd8e81e122f9192970e37172dfb9b873314..4d64b5e22731868e2045beb2824f8bef4e5c169f 100644
--- a/include/grpc++/security/credentials.h
+++ b/include/grpc++/security/credentials.h
@@ -37,12 +37,13 @@
 #include <map>
 #include <memory>
 
-#include <grpc++/impl/grpc_library.h>
+#include <grpc++/impl/codegen/grpc_library.h>
 #include <grpc++/security/auth_context.h>
-#include <grpc++/support/config.h>
 #include <grpc++/support/status.h>
 #include <grpc++/support/string_ref.h>
 
+struct grpc_call;
+
 namespace grpc {
 class ChannelArguments;
 class Channel;
@@ -56,9 +57,10 @@ class SecureCallCredentials;
 /// for all the calls on that channel.
 ///
 /// \see http://www.grpc.io/docs/guides/auth.html
-class ChannelCredentials : public GrpcLibrary {
+class ChannelCredentials : private GrpcLibrary {
  public:
-  ~ChannelCredentials() GRPC_OVERRIDE;
+  ChannelCredentials();
+  ~ChannelCredentials();
 
  protected:
   friend std::shared_ptr<ChannelCredentials> CompositeChannelCredentials(
@@ -81,9 +83,10 @@ class ChannelCredentials : public GrpcLibrary {
 /// authenticate with a server for a given call on a channel.
 ///
 /// \see http://www.grpc.io/docs/guides/auth.html
-class CallCredentials : public GrpcLibrary {
+class CallCredentials {
  public:
-  ~CallCredentials() GRPC_OVERRIDE;
+  CallCredentials();
+  ~CallCredentials();
 
   /// Apply this instance's credentials to \a call.
   virtual bool ApplyToCall(grpc_call* call) = 0;
diff --git a/include/grpc++/server.h b/include/grpc++/server.h
index f24ed333bbb5aec486b1a9f103c959344894f91a..2a71073a7e2f89852e6bc9342417420c702b6228 100644
--- a/include/grpc++/server.h
+++ b/include/grpc++/server.h
@@ -39,7 +39,9 @@
 
 #include <grpc++/completion_queue.h>
 #include <grpc++/impl/call.h>
-#include <grpc++/impl/grpc_library.h>
+#include <grpc++/impl/codegen/grpc_library.h>
+#include <grpc++/impl/codegen/server_interface.h>
+#include <grpc++/impl/rpc_service_method.h>
 #include <grpc++/impl/sync.h>
 #include <grpc++/security/server_credentials.h>
 #include <grpc++/support/channel_arguments.h>
@@ -51,11 +53,8 @@ struct grpc_server;
 
 namespace grpc {
 
-class AsynchronousService;
 class GenericServerContext;
 class AsyncGenericService;
-class RpcService;
-class RpcServiceMethod;
 class ServerAsyncStreamingInterface;
 class ServerContext;
 class ThreadPoolInterface;
@@ -63,28 +62,15 @@ class ThreadPoolInterface;
 /// Models a gRPC server.
 ///
 /// Servers are configured and started via \a grpc::ServerBuilder.
-class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
+class Server GRPC_FINAL : public ServerInterface, private GrpcLibrary {
  public:
   ~Server();
 
-  /// Shutdown the server, blocking until all rpc processing finishes.
-  /// Forcefully terminate pending calls after \a deadline expires.
-  ///
-  /// \param deadline How long to wait until pending rpcs are forcefully
-  /// terminated.
-  template <class T>
-  void Shutdown(const T& deadline) {
-    ShutdownInternal(TimePoint<T>(deadline).raw_time());
-  }
-
-  /// Shutdown the server, waiting for all rpc processing to finish.
-  void Shutdown() { ShutdownInternal(gpr_inf_future(GPR_CLOCK_MONOTONIC)); }
-
   /// Block waiting for all work to complete.
   ///
   /// \warning The server must be either shutting down or some other thread must
   /// call \a Shutdown for this function to ever return.
-  void Wait();
+  void Wait() GRPC_OVERRIDE;
 
   /// Global Callbacks
   ///
@@ -105,13 +91,16 @@ class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
 
  private:
   friend class AsyncGenericService;
-  friend class AsynchronousService;
   friend class ServerBuilder;
 
   class SyncRequest;
   class AsyncRequest;
   class ShutdownRequest;
 
+  class UnimplementedAsyncRequestContext;
+  class UnimplementedAsyncRequest;
+  class UnimplementedAsyncResponse;
+
   /// Server constructors. To be used by \a ServerBuilder only.
   ///
   /// \param thread_pool The threadpool instance to use for call processing.
@@ -123,16 +112,12 @@ class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
 
   /// Register a service. This call does not take ownership of the service.
   /// The service must exist for the lifetime of the Server instance.
-  bool RegisterService(const grpc::string* host, RpcService* service);
-
-  /// Register an asynchronous service. This call does not take ownership of the
-  /// service. The service must exist for the lifetime of the Server instance.
-  bool RegisterAsyncService(const grpc::string* host,
-                            AsynchronousService* service);
+  bool RegisterService(const grpc::string* host,
+                       Service* service) GRPC_OVERRIDE;
 
   /// Register a generic service. This call does not take ownership of the
   /// service. The service must exist for the lifetime of the Server instance.
-  void RegisterAsyncGenericService(AsyncGenericService* service);
+  void RegisterAsyncGenericService(AsyncGenericService* service) GRPC_OVERRIDE;
 
   /// Tries to bind \a server to the given \a addr.
   ///
@@ -145,7 +130,8 @@ class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
   /// \return bound port number on sucess, 0 on failure.
   ///
   /// \warning It's an error to call this method on an already started server.
-  int AddListeningPort(const grpc::string& addr, ServerCredentials* creds);
+  int AddListeningPort(const grpc::string& addr,
+                       ServerCredentials* creds) GRPC_OVERRIDE;
 
   /// Start the server.
   ///
@@ -155,141 +141,21 @@ class Server GRPC_FINAL : public GrpcLibrary, private CallHook {
   /// \param num_cqs How many completion queues does \a cqs hold.
   ///
   /// \return true on a successful shutdown.
-  bool Start(ServerCompletionQueue** cqs, size_t num_cqs);
-
-  void HandleQueueClosed();
+  bool Start(ServerCompletionQueue** cqs, size_t num_cqs) GRPC_OVERRIDE;
 
   /// Process one or more incoming calls.
-  void RunRpc();
+  void RunRpc() GRPC_OVERRIDE;
 
   /// Schedule \a RunRpc to run in the threadpool.
-  void ScheduleCallback();
+  void ScheduleCallback() GRPC_OVERRIDE;
 
   void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) GRPC_OVERRIDE;
 
-  void ShutdownInternal(gpr_timespec deadline);
-
-  class BaseAsyncRequest : public CompletionQueueTag {
-   public:
-    BaseAsyncRequest(Server* server, ServerContext* context,
-                     ServerAsyncStreamingInterface* stream,
-                     CompletionQueue* call_cq, void* tag,
-                     bool delete_on_finalize);
-    virtual ~BaseAsyncRequest();
-
-    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
-
-   protected:
-    Server* const server_;
-    ServerContext* const context_;
-    ServerAsyncStreamingInterface* const stream_;
-    CompletionQueue* const call_cq_;
-    void* const tag_;
-    const bool delete_on_finalize_;
-    grpc_call* call_;
-    grpc_metadata_array initial_metadata_array_;
-  };
-
-  class RegisteredAsyncRequest : public BaseAsyncRequest {
-   public:
-    RegisteredAsyncRequest(Server* server, ServerContext* context,
-                           ServerAsyncStreamingInterface* stream,
-                           CompletionQueue* call_cq, void* tag);
-
-    // uses BaseAsyncRequest::FinalizeResult
+  void ShutdownInternal(gpr_timespec deadline) GRPC_OVERRIDE;
 
-   protected:
-    void IssueRequest(void* registered_method, grpc_byte_buffer** payload,
-                      ServerCompletionQueue* notification_cq);
-  };
-
-  class NoPayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
-   public:
-    NoPayloadAsyncRequest(void* registered_method, Server* server,
-                          ServerContext* context,
-                          ServerAsyncStreamingInterface* stream,
-                          CompletionQueue* call_cq,
-                          ServerCompletionQueue* notification_cq, void* tag)
-        : RegisteredAsyncRequest(server, context, stream, call_cq, tag) {
-      IssueRequest(registered_method, nullptr, notification_cq);
-    }
-
-    // uses RegisteredAsyncRequest::FinalizeResult
-  };
-
-  template <class Message>
-  class PayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
-   public:
-    PayloadAsyncRequest(void* registered_method, Server* server,
-                        ServerContext* context,
-                        ServerAsyncStreamingInterface* stream,
-                        CompletionQueue* call_cq,
-                        ServerCompletionQueue* notification_cq, void* tag,
-                        Message* request)
-        : RegisteredAsyncRequest(server, context, stream, call_cq, tag),
-          request_(request) {
-      IssueRequest(registered_method, &payload_, notification_cq);
-    }
-
-    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
-      bool serialization_status =
-          *status && payload_ &&
-          SerializationTraits<Message>::Deserialize(
-              payload_, request_, server_->max_message_size_).ok();
-      bool ret = RegisteredAsyncRequest::FinalizeResult(tag, status);
-      *status = serialization_status&&* status;
-      return ret;
-    }
-
-   private:
-    grpc_byte_buffer* payload_;
-    Message* const request_;
-  };
-
-  class GenericAsyncRequest : public BaseAsyncRequest {
-   public:
-    GenericAsyncRequest(Server* server, GenericServerContext* context,
-                        ServerAsyncStreamingInterface* stream,
-                        CompletionQueue* call_cq,
-                        ServerCompletionQueue* notification_cq, void* tag,
-                        bool delete_on_finalize);
-
-    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
-
-   private:
-    grpc_call_details call_details_;
-  };
-
-  class UnimplementedAsyncRequestContext;
-  class UnimplementedAsyncRequest;
-  class UnimplementedAsyncResponse;
+  int max_message_size() const GRPC_OVERRIDE { return max_message_size_; };
 
-  template <class Message>
-  void RequestAsyncCall(void* registered_method, ServerContext* context,
-                        ServerAsyncStreamingInterface* stream,
-                        CompletionQueue* call_cq,
-                        ServerCompletionQueue* notification_cq, void* tag,
-                        Message* message) {
-    new PayloadAsyncRequest<Message>(registered_method, this, context, stream,
-                                     call_cq, notification_cq, tag, message);
-  }
-
-  void RequestAsyncCall(void* registered_method, ServerContext* context,
-                        ServerAsyncStreamingInterface* stream,
-                        CompletionQueue* call_cq,
-                        ServerCompletionQueue* notification_cq, void* tag) {
-    new NoPayloadAsyncRequest(registered_method, this, context, stream, call_cq,
-                              notification_cq, tag);
-  }
-
-  void RequestAsyncGenericCall(GenericServerContext* context,
-                               ServerAsyncStreamingInterface* stream,
-                               CompletionQueue* call_cq,
-                               ServerCompletionQueue* notification_cq,
-                               void* tag) {
-    new GenericAsyncRequest(this, context, stream, call_cq, notification_cq,
-                            tag, true);
-  }
+  grpc_server* server() GRPC_OVERRIDE { return server_; };
 
   const int max_message_size_;
 
diff --git a/include/grpc++/server_builder.h b/include/grpc++/server_builder.h
index b324deb9e087185a71917efd7356eff1907dc5b6..73bcfb6038791403a5df43b8fc97454641411245 100644
--- a/include/grpc++/server_builder.h
+++ b/include/grpc++/server_builder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,14 +44,12 @@
 namespace grpc {
 
 class AsyncGenericService;
-class AsynchronousService;
 class CompletionQueue;
 class RpcService;
 class Server;
 class ServerCompletionQueue;
 class ServerCredentials;
-class SynchronousService;
-class ThreadPoolInterface;
+class Service;
 
 /// A builder class for the creation and startup of \a grpc::Server instances.
 class ServerBuilder {
@@ -62,14 +60,7 @@ class ServerBuilder {
   /// The service must exist for the lifetime of the \a Server instance returned
   /// by \a BuildAndStart().
   /// Matches requests with any :authority
-  void RegisterService(SynchronousService* service);
-
-  /// Register an asynchronous service.
-  /// This call does not take ownership of the service or completion queue.
-  /// The service and completion queuemust exist for the lifetime of the \a
-  /// Server instance returned by \a BuildAndStart().
-  /// Matches requests with any :authority
-  void RegisterAsyncService(AsynchronousService* service);
+  void RegisterService(Service* service);
 
   /// Register a generic service.
   /// Matches requests with any :authority
@@ -79,15 +70,7 @@ class ServerBuilder {
   /// The service must exist for the lifetime of the \a Server instance returned
   /// by BuildAndStart().
   /// Only matches requests with :authority \a host
-  void RegisterService(const grpc::string& host, SynchronousService* service);
-
-  /// Register an asynchronous service.
-  /// This call does not take ownership of the service or completion queue.
-  /// The service and completion queuemust exist for the lifetime of the \a
-  /// Server instance returned by \a BuildAndStart().
-  /// Only matches requests with :authority equal to \a host
-  void RegisterAsyncService(const grpc::string& host,
-                            AsynchronousService* service);
+  void RegisterService(const grpc::string& host, Service* service);
 
   /// Set max message size in bytes.
   void SetMaxMessageSize(int max_message_size) {
@@ -132,26 +115,22 @@ class ServerBuilder {
   };
 
   typedef std::unique_ptr<grpc::string> HostString;
-  template <class T>
   struct NamedService {
-    explicit NamedService(T* s) : service(s) {}
-    NamedService(const grpc::string& h, T* s)
+    explicit NamedService(Service* s) : service(s) {}
+    NamedService(const grpc::string& h, Service* s)
         : host(new grpc::string(h)), service(s) {}
     HostString host;
-    T* service;
+    Service* service;
   };
 
   int max_message_size_;
   grpc_compression_options compression_options_;
   std::vector<std::unique_ptr<ServerBuilderOption>> options_;
-  std::vector<std::unique_ptr<NamedService<RpcService>>> services_;
-  std::vector<std::unique_ptr<NamedService<AsynchronousService>>>
-      async_services_;
+  std::vector<std::unique_ptr<NamedService>> services_;
   std::vector<Port> ports_;
   std::vector<ServerCompletionQueue*> cqs_;
   std::shared_ptr<ServerCredentials> creds_;
   AsyncGenericService* generic_service_;
-  ThreadPoolInterface* thread_pool_;
 };
 
 }  // namespace grpc
diff --git a/include/grpc++/server_context.h b/include/grpc++/server_context.h
index 8ba73486dc45c998251220d892e6e9c78214146d..214188a03a9fb22dbecae55be7e37732e2f1e98d 100644
--- a/include/grpc++/server_context.h
+++ b/include/grpc++/server_context.h
@@ -34,166 +34,6 @@
 #ifndef GRPCXX_SERVER_CONTEXT_H
 #define GRPCXX_SERVER_CONTEXT_H
 
-#include <map>
-#include <memory>
-
-#include <grpc/compression.h>
-#include <grpc/support/time.h>
-#include <grpc++/security/auth_context.h>
-#include <grpc++/support/config.h>
-#include <grpc++/support/string_ref.h>
-#include <grpc++/support/time.h>
-
-struct gpr_timespec;
-struct grpc_metadata;
-struct grpc_call;
-struct census_context;
-
-namespace grpc {
-
-class ClientContext;
-template <class W, class R>
-class ServerAsyncReader;
-template <class W>
-class ServerAsyncWriter;
-template <class W>
-class ServerAsyncResponseWriter;
-template <class W, class R>
-class ServerAsyncReaderWriter;
-template <class R>
-class ServerReader;
-template <class W>
-class ServerWriter;
-template <class W, class R>
-class ServerReaderWriter;
-template <class ServiceType, class RequestType, class ResponseType>
-class RpcMethodHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class ClientStreamingHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class ServerStreamingHandler;
-template <class ServiceType, class RequestType, class ResponseType>
-class BidiStreamingHandler;
-class UnknownMethodHandler;
-
-class Call;
-class CallOpBuffer;
-class CompletionQueue;
-class Server;
-
-namespace testing {
-class InteropServerContextInspector;
-}  // namespace testing
-
-// Interface of server side rpc context.
-class ServerContext {
- public:
-  ServerContext();  // for async calls
-  ~ServerContext();
-
-#ifndef GRPC_CXX0X_NO_CHRONO
-  std::chrono::system_clock::time_point deadline() {
-    return Timespec2Timepoint(deadline_);
-  }
-#endif  // !GRPC_CXX0X_NO_CHRONO
-
-  gpr_timespec raw_deadline() { return deadline_; }
-
-  void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
-  void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
-
-  bool IsCancelled() const;
-
-  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata() {
-    return client_metadata_;
-  }
-
-  grpc_compression_level compression_level() const {
-    return compression_level_;
-  }
-  void set_compression_level(grpc_compression_level level);
-
-  grpc_compression_algorithm compression_algorithm() const {
-    return compression_algorithm_;
-  }
-  void set_compression_algorithm(grpc_compression_algorithm algorithm);
-
-  std::shared_ptr<const AuthContext> auth_context() const;
-
-  // Return the peer uri in a string.
-  // WARNING: this value is never authenticated or subject to any security
-  // related code. It must not be used for any authentication related
-  // functionality. Instead, use auth_context.
-  grpc::string peer() const;
-
-  const struct census_context* census_context() const;
-
-  // Async only. Has to be called before the rpc starts.
-  // Returns the tag in completion queue when the rpc finishes.
-  // IsCancelled() can then be called to check whether the rpc was cancelled.
-  void AsyncNotifyWhenDone(void* tag) {
-    has_notify_when_done_tag_ = true;
-    async_notify_when_done_tag_ = tag;
-  }
-
- private:
-  friend class ::grpc::testing::InteropServerContextInspector;
-  friend class ::grpc::Server;
-  template <class W, class R>
-  friend class ::grpc::ServerAsyncReader;
-  template <class W>
-  friend class ::grpc::ServerAsyncWriter;
-  template <class W>
-  friend class ::grpc::ServerAsyncResponseWriter;
-  template <class W, class R>
-  friend class ::grpc::ServerAsyncReaderWriter;
-  template <class R>
-  friend class ::grpc::ServerReader;
-  template <class W>
-  friend class ::grpc::ServerWriter;
-  template <class W, class R>
-  friend class ::grpc::ServerReaderWriter;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class RpcMethodHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class ClientStreamingHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class ServerStreamingHandler;
-  template <class ServiceType, class RequestType, class ResponseType>
-  friend class BidiStreamingHandler;
-  friend class UnknownMethodHandler;
-  friend class ::grpc::ClientContext;
-
-  // Prevent copying.
-  ServerContext(const ServerContext&);
-  ServerContext& operator=(const ServerContext&);
-
-  class CompletionOp;
-
-  void BeginCompletionOp(Call* call);
-
-  ServerContext(gpr_timespec deadline, grpc_metadata* metadata,
-                size_t metadata_count);
-
-  void set_call(grpc_call* call);
-
-  CompletionOp* completion_op_;
-  bool has_notify_when_done_tag_;
-  void* async_notify_when_done_tag_;
-
-  gpr_timespec deadline_;
-  grpc_call* call_;
-  CompletionQueue* cq_;
-  bool sent_initial_metadata_;
-  mutable std::shared_ptr<const AuthContext> auth_context_;
-  std::multimap<grpc::string_ref, grpc::string_ref> client_metadata_;
-  std::multimap<grpc::string, grpc::string> initial_metadata_;
-  std::multimap<grpc::string, grpc::string> trailing_metadata_;
-
-  grpc_compression_level compression_level_;
-  grpc_compression_algorithm compression_algorithm_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/server_context.h>
 
 #endif  // GRPCXX_SERVER_CONTEXT_H
diff --git a/include/grpc++/support/async_stream.h b/include/grpc++/support/async_stream.h
index 0c96352ccdda2c39ec608d001f76a56f18945575..88147ea9d655d89e4f15a73823ccd5ca9a3b2aab 100644
--- a/include/grpc++/support/async_stream.h
+++ b/include/grpc++/support/async_stream.h
@@ -34,430 +34,6 @@
 #ifndef GRPCXX_SUPPORT_ASYNC_STREAM_H
 #define GRPCXX_SUPPORT_ASYNC_STREAM_H
 
-#include <grpc/support/log.h>
-#include <grpc++/channel.h>
-#include <grpc++/client_context.h>
-#include <grpc++/completion_queue.h>
-#include <grpc++/impl/call.h>
-#include <grpc++/impl/service_type.h>
-#include <grpc++/server_context.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-/// Common interface for all client side asynchronous streaming.
-class ClientAsyncStreamingInterface {
- public:
-  virtual ~ClientAsyncStreamingInterface() {}
-
-  /// Request notification of the reading of the initial metadata. Completion
-  /// will be notified by \a tag on the associated completion queue.
-  ///
-  /// \param[in] tag Tag identifying this request.
-  virtual void ReadInitialMetadata(void* tag) = 0;
-
-  /// Request notification completion.
-  ///
-  /// \param[out] status To be updated with the operation status.
-  /// \param[in] tag Tag identifying this request.
-  virtual void Finish(Status* status, void* tag) = 0;
-};
-
-/// An interface that yields a sequence of messages of type \a R.
-template <class R>
-class AsyncReaderInterface {
- public:
-  virtual ~AsyncReaderInterface() {}
-
-  /// Read a message of type \a R into \a msg. Completion will be notified by \a
-  /// tag on the associated completion queue.
-  ///
-  /// \param[out] msg Where to eventually store the read message.
-  /// \param[in] tag The tag identifying the operation.
-  virtual void Read(R* msg, void* tag) = 0;
-};
-
-/// An interface that can be fed a sequence of messages of type \a W.
-template <class W>
-class AsyncWriterInterface {
- public:
-  virtual ~AsyncWriterInterface() {}
-
-  /// Request the writing of \a msg with identifying tag \a tag.
-  ///
-  /// Only one write may be outstanding at any given time. This means that
-  /// after calling Write, one must wait to receive \a tag from the completion
-  /// queue BEFORE calling Write again.
-  ///
-  /// \param[in] msg The message to be written.
-  /// \param[in] tag The tag identifying the operation.
-  virtual void Write(const W& msg, void* tag) = 0;
-};
-
-template <class R>
-class ClientAsyncReaderInterface : public ClientAsyncStreamingInterface,
-                                   public AsyncReaderInterface<R> {};
-
-template <class R>
-class ClientAsyncReader GRPC_FINAL : public ClientAsyncReaderInterface<R> {
- public:
-  /// Create a stream and write the first request out.
-  template <class W>
-  ClientAsyncReader(Channel* channel, CompletionQueue* cq,
-                    const RpcMethod& method, ClientContext* context,
-                    const W& request, void* tag)
-      : context_(context), call_(channel->CreateCall(method, context, cq)) {
-    init_ops_.set_output_tag(tag);
-    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(init_ops_.SendMessage(request).ok());
-    init_ops_.ClientSendClose();
-    call_.PerformOps(&init_ops_);
-  }
-
-  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.RecvInitialMetadata(context_);
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Read(R* msg, void* tag) GRPC_OVERRIDE {
-    read_ops_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      read_ops_.RecvInitialMetadata(context_);
-    }
-    read_ops_.RecvMessage(msg);
-    call_.PerformOps(&read_ops_);
-  }
-
-  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
-    finish_ops_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      finish_ops_.RecvInitialMetadata(context_);
-    }
-    finish_ops_.ClientRecvStatus(context_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  ClientContext* context_;
-  Call call_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose>
-      init_ops_;
-  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> read_ops_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> finish_ops_;
-};
-
-/// Common interface for client side asynchronous writing.
-template <class W>
-class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
-                                   public AsyncWriterInterface<W> {
- public:
-  /// Signal the client is done with the writes.
-  ///
-  /// \param[in] tag The tag identifying the operation.
-  virtual void WritesDone(void* tag) = 0;
-};
-
-template <class W>
-class ClientAsyncWriter GRPC_FINAL : public ClientAsyncWriterInterface<W> {
- public:
-  template <class R>
-  ClientAsyncWriter(Channel* channel, CompletionQueue* cq,
-                    const RpcMethod& method, ClientContext* context,
-                    R* response, void* tag)
-      : context_(context), call_(channel->CreateCall(method, context, cq)) {
-    finish_ops_.RecvMessage(response);
-
-    init_ops_.set_output_tag(tag);
-    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
-    call_.PerformOps(&init_ops_);
-  }
-
-  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.RecvInitialMetadata(context_);
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
-    write_ops_.set_output_tag(tag);
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
-    call_.PerformOps(&write_ops_);
-  }
-
-  void WritesDone(void* tag) GRPC_OVERRIDE {
-    writes_done_ops_.set_output_tag(tag);
-    writes_done_ops_.ClientSendClose();
-    call_.PerformOps(&writes_done_ops_);
-  }
-
-  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
-    finish_ops_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      finish_ops_.RecvInitialMetadata(context_);
-    }
-    finish_ops_.ClientRecvStatus(context_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  ClientContext* context_;
-  Call call_;
-  CallOpSet<CallOpSendInitialMetadata> init_ops_;
-  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
-  CallOpSet<CallOpSendMessage> write_ops_;
-  CallOpSet<CallOpClientSendClose> writes_done_ops_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpGenericRecvMessage,
-            CallOpClientRecvStatus> finish_ops_;
-};
-
-/// Client-side interface for asynchronous bi-directional streaming.
-template <class W, class R>
-class ClientAsyncReaderWriterInterface : public ClientAsyncStreamingInterface,
-                                         public AsyncWriterInterface<W>,
-                                         public AsyncReaderInterface<R> {
- public:
-  /// Signal the client is done with the writes.
-  ///
-  /// \param[in] tag The tag identifying the operation.
-  virtual void WritesDone(void* tag) = 0;
-};
-
-template <class W, class R>
-class ClientAsyncReaderWriter GRPC_FINAL
-    : public ClientAsyncReaderWriterInterface<W, R> {
- public:
-  ClientAsyncReaderWriter(Channel* channel, CompletionQueue* cq,
-                          const RpcMethod& method, ClientContext* context,
-                          void* tag)
-      : context_(context), call_(channel->CreateCall(method, context, cq)) {
-    init_ops_.set_output_tag(tag);
-    init_ops_.SendInitialMetadata(context->send_initial_metadata_);
-    call_.PerformOps(&init_ops_);
-  }
-
-  void ReadInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.RecvInitialMetadata(context_);
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Read(R* msg, void* tag) GRPC_OVERRIDE {
-    read_ops_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      read_ops_.RecvInitialMetadata(context_);
-    }
-    read_ops_.RecvMessage(msg);
-    call_.PerformOps(&read_ops_);
-  }
-
-  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
-    write_ops_.set_output_tag(tag);
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
-    call_.PerformOps(&write_ops_);
-  }
-
-  void WritesDone(void* tag) GRPC_OVERRIDE {
-    writes_done_ops_.set_output_tag(tag);
-    writes_done_ops_.ClientSendClose();
-    call_.PerformOps(&writes_done_ops_);
-  }
-
-  void Finish(Status* status, void* tag) GRPC_OVERRIDE {
-    finish_ops_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      finish_ops_.RecvInitialMetadata(context_);
-    }
-    finish_ops_.ClientRecvStatus(context_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  ClientContext* context_;
-  Call call_;
-  CallOpSet<CallOpSendInitialMetadata> init_ops_;
-  CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> read_ops_;
-  CallOpSet<CallOpSendMessage> write_ops_;
-  CallOpSet<CallOpClientSendClose> writes_done_ops_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> finish_ops_;
-};
-
-template <class W, class R>
-class ServerAsyncReader GRPC_FINAL : public ServerAsyncStreamingInterface,
-                                     public AsyncReaderInterface<R> {
- public:
-  explicit ServerAsyncReader(ServerContext* ctx)
-      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
-
-  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Read(R* msg, void* tag) GRPC_OVERRIDE {
-    read_ops_.set_output_tag(tag);
-    read_ops_.RecvMessage(msg);
-    call_.PerformOps(&read_ops_);
-  }
-
-  void Finish(const W& msg, const Status& status, void* tag) {
-    finish_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    // The response is dropped if the status is not OK.
-    if (status.ok()) {
-      finish_ops_.ServerSendStatus(ctx_->trailing_metadata_,
-                                   finish_ops_.SendMessage(msg));
-    } else {
-      finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    }
-    call_.PerformOps(&finish_ops_);
-  }
-
-  void FinishWithError(const Status& status, void* tag) {
-    GPR_ASSERT(!status.ok());
-    finish_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
-
-  Call call_;
-  ServerContext* ctx_;
-  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
-  CallOpSet<CallOpRecvMessage<R>> read_ops_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-            CallOpServerSendStatus> finish_ops_;
-};
-
-template <class W>
-class ServerAsyncWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
-                                     public AsyncWriterInterface<W> {
- public:
-  explicit ServerAsyncWriter(ServerContext* ctx)
-      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
-
-  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
-    write_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
-    call_.PerformOps(&write_ops_);
-  }
-
-  void Finish(const Status& status, void* tag) {
-    finish_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
-
-  Call call_;
-  ServerContext* ctx_;
-  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> write_ops_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> finish_ops_;
-};
-
-/// Server-side interface for asynchronous bi-directional streaming.
-template <class W, class R>
-class ServerAsyncReaderWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
-                                           public AsyncWriterInterface<W>,
-                                           public AsyncReaderInterface<R> {
- public:
-  explicit ServerAsyncReaderWriter(ServerContext* ctx)
-      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
-
-  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    meta_ops_.set_output_tag(tag);
-    meta_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_.PerformOps(&meta_ops_);
-  }
-
-  void Read(R* msg, void* tag) GRPC_OVERRIDE {
-    read_ops_.set_output_tag(tag);
-    read_ops_.RecvMessage(msg);
-    call_.PerformOps(&read_ops_);
-  }
-
-  void Write(const W& msg, void* tag) GRPC_OVERRIDE {
-    write_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(write_ops_.SendMessage(msg).ok());
-    call_.PerformOps(&write_ops_);
-  }
-
-  void Finish(const Status& status, void* tag) {
-    finish_ops_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_ops_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    call_.PerformOps(&finish_ops_);
-  }
-
- private:
-  friend class ::grpc::Server;
-
-  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
-
-  Call call_;
-  ServerContext* ctx_;
-  CallOpSet<CallOpSendInitialMetadata> meta_ops_;
-  CallOpSet<CallOpRecvMessage<R>> read_ops_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> write_ops_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpServerSendStatus> finish_ops_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/async_stream.h>
 
 #endif  // GRPCXX_SUPPORT_ASYNC_STREAM_H
diff --git a/include/grpc++/support/async_unary_call.h b/include/grpc++/support/async_unary_call.h
index 0f4ad2656fccd94a6d1f3daecfa4bd5f4459305d..6d74328be503bc894566ed4085aaddb696d1cc2b 100644
--- a/include/grpc++/support/async_unary_call.h
+++ b/include/grpc++/support/async_unary_call.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,122 +34,6 @@
 #ifndef GRPCXX_SUPPORT_ASYNC_UNARY_CALL_H
 #define GRPCXX_SUPPORT_ASYNC_UNARY_CALL_H
 
-#include <grpc/support/log.h>
-#include <grpc++/channel.h>
-#include <grpc++/client_context.h>
-#include <grpc++/completion_queue.h>
-#include <grpc++/server_context.h>
-#include <grpc++/impl/call.h>
-#include <grpc++/impl/service_type.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-template <class R>
-class ClientAsyncResponseReaderInterface {
- public:
-  virtual ~ClientAsyncResponseReaderInterface() {}
-  virtual void ReadInitialMetadata(void* tag) = 0;
-  virtual void Finish(R* msg, Status* status, void* tag) = 0;
-};
-
-template <class R>
-class ClientAsyncResponseReader GRPC_FINAL
-    : public ClientAsyncResponseReaderInterface<R> {
- public:
-  template <class W>
-  ClientAsyncResponseReader(Channel* channel, CompletionQueue* cq,
-                            const RpcMethod& method, ClientContext* context,
-                            const W& request)
-      : context_(context), call_(channel->CreateCall(method, context, cq)) {
-    init_buf_.SendInitialMetadata(context->send_initial_metadata_);
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(init_buf_.SendMessage(request).ok());
-    init_buf_.ClientSendClose();
-    call_.PerformOps(&init_buf_);
-  }
-
-  void ReadInitialMetadata(void* tag) {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    meta_buf_.set_output_tag(tag);
-    meta_buf_.RecvInitialMetadata(context_);
-    call_.PerformOps(&meta_buf_);
-  }
-
-  void Finish(R* msg, Status* status, void* tag) {
-    finish_buf_.set_output_tag(tag);
-    if (!context_->initial_metadata_received_) {
-      finish_buf_.RecvInitialMetadata(context_);
-    }
-    finish_buf_.RecvMessage(msg);
-    finish_buf_.ClientRecvStatus(context_, status);
-    call_.PerformOps(&finish_buf_);
-  }
-
- private:
-  ClientContext* context_;
-  Call call_;
-  SneakyCallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-                  CallOpClientSendClose> init_buf_;
-  CallOpSet<CallOpRecvInitialMetadata> meta_buf_;
-  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>,
-            CallOpClientRecvStatus> finish_buf_;
-};
-
-template <class W>
-class ServerAsyncResponseWriter GRPC_FINAL
-    : public ServerAsyncStreamingInterface {
- public:
-  explicit ServerAsyncResponseWriter(ServerContext* ctx)
-      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
-
-  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    meta_buf_.set_output_tag(tag);
-    meta_buf_.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_.PerformOps(&meta_buf_);
-  }
-
-  void Finish(const W& msg, const Status& status, void* tag) {
-    finish_buf_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    // The response is dropped if the status is not OK.
-    if (status.ok()) {
-      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_,
-                                   finish_buf_.SendMessage(msg));
-    } else {
-      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    }
-    call_.PerformOps(&finish_buf_);
-  }
-
-  void FinishWithError(const Status& status, void* tag) {
-    GPR_ASSERT(!status.ok());
-    finish_buf_.set_output_tag(tag);
-    if (!ctx_->sent_initial_metadata_) {
-      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
-    call_.PerformOps(&finish_buf_);
-  }
-
- private:
-  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
-
-  Call call_;
-  ServerContext* ctx_;
-  CallOpSet<CallOpSendInitialMetadata> meta_buf_;
-  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-            CallOpServerSendStatus> finish_buf_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/async_unary_call.h>
 
 #endif  // GRPCXX_SUPPORT_ASYNC_UNARY_CALL_H
diff --git a/include/grpc++/support/config.h b/include/grpc++/support/config.h
index 836bd47283a3f3131629f25ab4566aa418f40633..be8c89c4626503f23cf86ce01731fd3b37428be6 100644
--- a/include/grpc++/support/config.h
+++ b/include/grpc++/support/config.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,83 +34,6 @@
 #ifndef GRPCXX_SUPPORT_CONFIG_H
 #define GRPCXX_SUPPORT_CONFIG_H
 
-#if !defined(GRPC_NO_AUTODETECT_PLATFORM)
-
-#ifdef _MSC_VER
-// Visual Studio 2010 is 1600.
-#if _MSC_VER < 1600
-#error "gRPC is only supported with Visual Studio starting at 2010"
-// Visual Studio 2013 is 1800.
-#elif _MSC_VER < 1800
-#define GRPC_CXX0X_NO_FINAL 1
-#define GRPC_CXX0X_NO_OVERRIDE 1
-#define GRPC_CXX0X_NO_CHRONO 1
-#define GRPC_CXX0X_NO_THREAD 1
-#endif
-#endif  // Visual Studio
-
-#ifndef __clang__
-#ifdef __GNUC__
-// nullptr was added in gcc 4.6
-#if (__GNUC__ * 100 + __GNUC_MINOR__ < 406)
-#define GRPC_CXX0X_NO_NULLPTR 1
-#endif
-// final and override were added in gcc 4.7
-#if (__GNUC__ * 100 + __GNUC_MINOR__ < 407)
-#define GRPC_CXX0X_NO_FINAL 1
-#define GRPC_CXX0X_NO_OVERRIDE 1
-#endif
-#endif
-#endif
-
-#endif
-
-#ifdef GRPC_CXX0X_NO_FINAL
-#define GRPC_FINAL
-#else
-#define GRPC_FINAL final
-#endif
-
-#ifdef GRPC_CXX0X_NO_OVERRIDE
-#define GRPC_OVERRIDE
-#else
-#define GRPC_OVERRIDE override
-#endif
-
-#ifdef GRPC_CXX0X_NO_NULLPTR
-#include <memory>
-namespace grpc {
-const class {
- public:
-  template <class T>
-  operator T *() const {
-    return static_cast<T *>(0);
-  }
-  template <class T>
-  operator std::unique_ptr<T>() const {
-    return std::unique_ptr<T>(static_cast<T *>(0));
-  }
-  template <class T>
-  operator std::shared_ptr<T>() const {
-    return std::shared_ptr<T>(static_cast<T *>(0));
-  }
-  operator bool() const { return false; }
-
- private:
-  void operator&() const = delete;
-} nullptr = {};
-}
-#endif
-
-#ifndef GRPC_CUSTOM_STRING
-#include <string>
-#define GRPC_CUSTOM_STRING std::string
-#endif
-
-namespace grpc {
-
-typedef GRPC_CUSTOM_STRING string;
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/config.h>
 
 #endif  // GRPCXX_SUPPORT_CONFIG_H
diff --git a/include/grpc++/support/config_protobuf.h b/include/grpc++/support/config_protobuf.h
index 8235590d413fd68598e69b5e2f2cdab3e36abe2b..0b466e8e44baaf0d9bfab36672ed8006c3def10a 100644
--- a/include/grpc++/support/config_protobuf.h
+++ b/include/grpc++/support/config_protobuf.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,39 +34,6 @@
 #ifndef GRPCXX_SUPPORT_CONFIG_PROTOBUF_H
 #define GRPCXX_SUPPORT_CONFIG_PROTOBUF_H
 
-#ifndef GRPC_CUSTOM_PROTOBUF_INT64
-#include <google/protobuf/stubs/common.h>
-#define GRPC_CUSTOM_PROTOBUF_INT64 ::google::protobuf::int64
-#endif
-
-#ifndef GRPC_CUSTOM_MESSAGE
-#include <google/protobuf/message.h>
-#define GRPC_CUSTOM_MESSAGE ::google::protobuf::Message
-#endif
-
-#ifndef GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM
-#include <google/protobuf/io/coded_stream.h>
-#include <google/protobuf/io/zero_copy_stream.h>
-#define GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM \
-  ::google::protobuf::io::ZeroCopyOutputStream
-#define GRPC_CUSTOM_ZEROCOPYINPUTSTREAM \
-  ::google::protobuf::io::ZeroCopyInputStream
-#define GRPC_CUSTOM_CODEDINPUTSTREAM ::google::protobuf::io::CodedInputStream
-#endif
-
-namespace grpc {
-namespace protobuf {
-
-typedef GRPC_CUSTOM_MESSAGE Message;
-typedef GRPC_CUSTOM_PROTOBUF_INT64 int64;
-
-namespace io {
-typedef GRPC_CUSTOM_ZEROCOPYOUTPUTSTREAM ZeroCopyOutputStream;
-typedef GRPC_CUSTOM_ZEROCOPYINPUTSTREAM ZeroCopyInputStream;
-typedef GRPC_CUSTOM_CODEDINPUTSTREAM CodedInputStream;
-}  // namespace io
-
-}  // namespace protobuf
-}  // namespace grpc
+#include <grpc++/impl/codegen/config_protobuf.h>
 
 #endif  // GRPCXX_SUPPORT_CONFIG_PROTOBUF_H
diff --git a/include/grpc++/support/status.h b/include/grpc++/support/status.h
index e59bac92d14cb94b9602115131655414230acc6f..a33fbedf12f4726c95312208e323d64e0861752a 100644
--- a/include/grpc++/support/status.h
+++ b/include/grpc++/support/status.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,43 +34,6 @@
 #ifndef GRPCXX_SUPPORT_STATUS_H
 #define GRPCXX_SUPPORT_STATUS_H
 
-#include <grpc++/support/config.h>
-#include <grpc++/support/status_code_enum.h>
-
-namespace grpc {
-
-/// Did it work? If it didn't, why?
-///
-/// See \a grpc::StatusCode for details on the available code and their meaning.
-class Status {
- public:
-  /// Construct an OK instance.
-  Status() : code_(StatusCode::OK) {}
-
-  /// Construct an instance with associated \a code and \a details (also
-  // referred to as "error_message").
-  Status(StatusCode code, const grpc::string& details)
-      : code_(code), details_(details) {}
-
-  // Pre-defined special status objects.
-  /// An OK pre-defined instance.
-  static const Status& OK;
-  /// A CANCELLED pre-defined instance.
-  static const Status& CANCELLED;
-
-  /// Return the instance's error code.
-  StatusCode error_code() const { return code_; }
-  /// Return the instance's error message.
-  grpc::string error_message() const { return details_; }
-
-  /// Is the status OK?
-  bool ok() const { return code_ == StatusCode::OK; }
-
- private:
-  StatusCode code_;
-  grpc::string details_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/status.h>
 
 #endif  // GRPCXX_SUPPORT_STATUS_H
diff --git a/include/grpc++/support/status_code_enum.h b/include/grpc++/support/status_code_enum.h
index ee05b40b51f278369c30f7dac1063232ddf85c7e..21b9c40d7e8ac129c80cb58b1d81efa5f784df34 100644
--- a/include/grpc++/support/status_code_enum.h
+++ b/include/grpc++/support/status_code_enum.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,119 +34,6 @@
 #ifndef GRPCXX_SUPPORT_STATUS_CODE_ENUM_H
 #define GRPCXX_SUPPORT_STATUS_CODE_ENUM_H
 
-namespace grpc {
-
-enum StatusCode {
-  /// Not an error; returned on success.
-  OK = 0,
-
-  /// The operation was cancelled (typically by the caller).
-  CANCELLED = 1,
-
-  /// Unknown error. An example of where this error may be returned is if a
-  /// Status value received from another address space belongs to an error-space
-  /// that is not known in this address space. Also errors raised by APIs that
-  /// do not return enough error information may be converted to this error.
-  UNKNOWN = 2,
-
-  /// Client specified an invalid argument. Note that this differs from
-  /// FAILED_PRECONDITION. INVALID_ARGUMENT indicates arguments that are
-  /// problematic regardless of the state of the system (e.g., a malformed file
-  /// name).
-  INVALID_ARGUMENT = 3,
-
-  /// Deadline expired before operation could complete. For operations that
-  /// change the state of the system, this error may be returned even if the
-  /// operation has completed successfully. For example, a successful response
-  /// from a server could have been delayed long enough for the deadline to
-  /// expire.
-  DEADLINE_EXCEEDED = 4,
-
-  /// Some requested entity (e.g., file or directory) was not found.
-  NOT_FOUND = 5,
-
-  /// Some entity that we attempted to create (e.g., file or directory) already
-  /// exists.
-  ALREADY_EXISTS = 6,
-
-  /// The caller does not have permission to execute the specified operation.
-  /// PERMISSION_DENIED must not be used for rejections caused by exhausting
-  /// some resource (use RESOURCE_EXHAUSTED instead for those errors).
-  /// PERMISSION_DENIED must not be used if the caller can not be identified
-  /// (use UNAUTHENTICATED instead for those errors).
-  PERMISSION_DENIED = 7,
-
-  /// The request does not have valid authentication credentials for the
-  /// operation.
-  UNAUTHENTICATED = 16,
-
-  /// Some resource has been exhausted, perhaps a per-user quota, or perhaps the
-  /// entire file system is out of space.
-  RESOURCE_EXHAUSTED = 8,
-
-  /// Operation was rejected because the system is not in a state required for
-  /// the operation's execution. For example, directory to be deleted may be
-  /// non-empty, an rmdir operation is applied to a non-directory, etc.
-  ///
-  /// A litmus test that may help a service implementor in deciding
-  /// between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
-  ///  (a) Use UNAVAILABLE if the client can retry just the failing call.
-  ///  (b) Use ABORTED if the client should retry at a higher-level
-  ///      (e.g., restarting a read-modify-write sequence).
-  ///  (c) Use FAILED_PRECONDITION if the client should not retry until
-  ///      the system state has been explicitly fixed. E.g., if an "rmdir"
-  ///      fails because the directory is non-empty, FAILED_PRECONDITION
-  ///      should be returned since the client should not retry unless
-  ///      they have first fixed up the directory by deleting files from it.
-  ///  (d) Use FAILED_PRECONDITION if the client performs conditional
-  ///      REST Get/Update/Delete on a resource and the resource on the
-  ///      server does not match the condition. E.g., conflicting
-  ///      read-modify-write on the same resource.
-  FAILED_PRECONDITION = 9,
-
-  /// The operation was aborted, typically due to a concurrency issue like
-  /// sequencer check failures, transaction aborts, etc.
-  ///
-  /// See litmus test above for deciding between FAILED_PRECONDITION, ABORTED,
-  /// and UNAVAILABLE.
-  ABORTED = 10,
-
-  /// Operation was attempted past the valid range. E.g., seeking or reading
-  /// past end of file.
-  ///
-  /// Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed
-  /// if the system state changes. For example, a 32-bit file system will
-  /// generate INVALID_ARGUMENT if asked to read at an offset that is not in the
-  /// range [0,2^32-1], but it will generate OUT_OF_RANGE if asked to read from
-  /// an offset past the current file size.
-  ///
-  /// There is a fair bit of overlap between FAILED_PRECONDITION and
-  /// OUT_OF_RANGE. We recommend using OUT_OF_RANGE (the more specific error)
-  /// when it applies so that callers who are iterating through a space can
-  /// easily look for an OUT_OF_RANGE error to detect when they are done.
-  OUT_OF_RANGE = 11,
-
-  /// Operation is not implemented or not supported/enabled in this service.
-  UNIMPLEMENTED = 12,
-
-  /// Internal errors. Means some invariants expected by underlying System has
-  /// been broken. If you see one of these errors, Something is very broken.
-  INTERNAL = 13,
-
-  /// The service is currently unavailable. This is a most likely a transient
-  /// condition and may be corrected by retrying with a backoff.
-  ///
-  /// See litmus test above for deciding between FAILED_PRECONDITION, ABORTED,
-  /// and UNAVAILABLE.
-  UNAVAILABLE = 14,
-
-  /// Unrecoverable data loss or corruption.
-  DATA_LOSS = 15,
-
-  /// Force users to include a default branch:
-  DO_NOT_USE = -1
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/status_code_enum.h>
 
 #endif  // GRPCXX_SUPPORT_STATUS_CODE_ENUM_H
diff --git a/include/grpc++/support/string_ref.h b/include/grpc++/support/string_ref.h
index 9d965260ca34b260a7e7ddeff516d7124ddeea82..195e5c80c5d6c86c49e2920f96c4581b38842278 100644
--- a/include/grpc++/support/string_ref.h
+++ b/include/grpc++/support/string_ref.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,90 +34,6 @@
 #ifndef GRPCXX_SUPPORT_STRING_REF_H
 #define GRPCXX_SUPPORT_STRING_REF_H
 
-#include <iterator>
-#include <iosfwd>
-
-#include <grpc++/support/config.h>
-
-namespace grpc {
-
-/// This class is a non owning reference to a string.
-///
-/// It should be a strict subset of the upcoming std::string_ref.
-///
-/// \see http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3442.html
-///
-/// The constexpr is dropped or replaced with const for legacy compiler
-/// compatibility.
-class string_ref {
- public:
-  // types
-  typedef const char* const_iterator;
-  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
-
-  // constants
-  const static size_t npos;
-
-  // construct/copy.
-  string_ref() : data_(nullptr), length_(0) {}
-  string_ref(const string_ref& other)
-      : data_(other.data_), length_(other.length_) {}
-  string_ref& operator=(const string_ref& rhs);
-  string_ref(const char* s);
-  string_ref(const char* s, size_t l) : data_(s), length_(l) {}
-  string_ref(const grpc::string& s) : data_(s.data()), length_(s.length()) {}
-
-  // iterators
-  const_iterator begin() const { return data_; }
-  const_iterator end() const { return data_ + length_; }
-  const_iterator cbegin() const { return data_; }
-  const_iterator cend() const { return data_ + length_; }
-  const_reverse_iterator rbegin() const {
-    return const_reverse_iterator(end());
-  }
-  const_reverse_iterator rend() const {
-    return const_reverse_iterator(begin());
-  }
-  const_reverse_iterator crbegin() const {
-    return const_reverse_iterator(end());
-  }
-  const_reverse_iterator crend() const {
-    return const_reverse_iterator(begin());
-  }
-
-  // capacity
-  size_t size() const { return length_; }
-  size_t length() const { return length_; }
-  size_t max_size() const { return length_; }
-  bool empty() const { return length_ == 0; }
-
-  // element access
-  const char* data() const { return data_; }
-
-  // string operations
-  int compare(string_ref x) const;
-  bool starts_with(string_ref x) const;
-  bool ends_with(string_ref x) const;
-  size_t find(string_ref s) const;
-  size_t find(char c) const;
-
-  string_ref substr(size_t pos, size_t n = npos) const;
-
- private:
-  const char* data_;
-  size_t length_;
-};
-
-// Comparison operators
-bool operator==(string_ref x, string_ref y);
-bool operator!=(string_ref x, string_ref y);
-bool operator<(string_ref x, string_ref y);
-bool operator>(string_ref x, string_ref y);
-bool operator<=(string_ref x, string_ref y);
-bool operator>=(string_ref x, string_ref y);
-
-std::ostream& operator<<(std::ostream& stream, const string_ref& string);
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/string_ref.h>
 
 #endif  // GRPCXX_SUPPORT_STRING_REF_H
diff --git a/include/grpc++/support/stub_options.h b/include/grpc++/support/stub_options.h
index 973aa9bc83820d101948d07fe59fc2bf41b2fc0b..f8f4c871812c26a5fc5a252f50d67c5a38aa1582 100644
--- a/include/grpc++/support/stub_options.h
+++ b/include/grpc++/support/stub_options.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,10 +34,6 @@
 #ifndef GRPCXX_SUPPORT_STUB_OPTIONS_H
 #define GRPCXX_SUPPORT_STUB_OPTIONS_H
 
-namespace grpc {
-
-class StubOptions {};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/stub_options.h>
 
 #endif  // GRPCXX_SUPPORT_STUB_OPTIONS_H
diff --git a/include/grpc++/support/sync_stream.h b/include/grpc++/support/sync_stream.h
index daf4e367aeb6ffe99c281a5b6359af8dce341c30..2ea2ac544365e3ec2def18704a4acf0b84e4c33f 100644
--- a/include/grpc++/support/sync_stream.h
+++ b/include/grpc++/support/sync_stream.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,382 +34,6 @@
 #ifndef GRPCXX_SUPPORT_SYNC_STREAM_H
 #define GRPCXX_SUPPORT_SYNC_STREAM_H
 
-#include <grpc/support/log.h>
-#include <grpc++/channel.h>
-#include <grpc++/client_context.h>
-#include <grpc++/completion_queue.h>
-#include <grpc++/impl/call.h>
-#include <grpc++/impl/service_type.h>
-#include <grpc++/server_context.h>
-#include <grpc++/support/status.h>
-
-namespace grpc {
-
-/// Common interface for all synchronous client side streaming.
-class ClientStreamingInterface {
- public:
-  virtual ~ClientStreamingInterface() {}
-
-  /// Wait until the stream finishes, and return the final status. When the
-  /// client side declares it has no more message to send, either implicitly or
-  /// by calling \a WritesDone(), it needs to make sure there is no more message
-  /// to be received from the server, either implicitly or by getting a false
-  /// from a \a Read().
-  ///
-  /// This function will return either:
-  /// - when all incoming messages have been read and the server has returned
-  ///   status.
-  /// - OR when the server has returned a non-OK status.
-  virtual Status Finish() = 0;
-};
-
-/// An interface that yields a sequence of messages of type \a R.
-template <class R>
-class ReaderInterface {
- public:
-  virtual ~ReaderInterface() {}
-
-  /// Blocking read a message and parse to \a msg. Returns \a true on success.
-  ///
-  /// \param[out] msg The read message.
-  ///
-  /// \return \a false when there will be no more incoming messages, either
-  /// because the other side has called \a WritesDone() or the stream has failed
-  /// (or been cancelled).
-  virtual bool Read(R* msg) = 0;
-};
-
-/// An interface that can be fed a sequence of messages of type \a W.
-template <class W>
-class WriterInterface {
- public:
-  virtual ~WriterInterface() {}
-
-  /// Blocking write \a msg to the stream with options.
-  ///
-  /// \param msg The message to be written to the stream.
-  /// \param options Options affecting the write operation.
-  ///
-  /// \return \a true on success, \a false when the stream has been closed.
-  virtual bool Write(const W& msg, const WriteOptions& options) = 0;
-
-  /// Blocking write \a msg to the stream with default options.
-  ///
-  /// \param msg The message to be written to the stream.
-  ///
-  /// \return \a true on success, \a false when the stream has been closed.
-  inline bool Write(const W& msg) { return Write(msg, WriteOptions()); }
-};
-
-/// Client-side interface for streaming reads of message of type \a R.
-template <class R>
-class ClientReaderInterface : public ClientStreamingInterface,
-                              public ReaderInterface<R> {
- public:
-  /// Blocking wait for initial metadata from server. The received metadata
-  /// can only be accessed after this call returns. Should only be called before
-  /// the first read. Calling this method is optional, and if it is not called
-  /// the metadata will be available in ClientContext after the first read.
-  virtual void WaitForInitialMetadata() = 0;
-};
-
-template <class R>
-class ClientReader GRPC_FINAL : public ClientReaderInterface<R> {
- public:
-  /// Blocking create a stream and write the first request out.
-  template <class W>
-  ClientReader(Channel* channel, const RpcMethod& method,
-               ClientContext* context, const W& request)
-      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
-    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
-              CallOpClientSendClose> ops;
-    ops.SendInitialMetadata(context->send_initial_metadata_);
-    // TODO(ctiller): don't assert
-    GPR_ASSERT(ops.SendMessage(request).ok());
-    ops.ClientSendClose();
-    call_.PerformOps(&ops);
-    cq_.Pluck(&ops);
-  }
-
-  void WaitForInitialMetadata() GRPC_OVERRIDE {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    CallOpSet<CallOpRecvInitialMetadata> ops;
-    ops.RecvInitialMetadata(context_);
-    call_.PerformOps(&ops);
-    cq_.Pluck(&ops);  /// status ignored
-  }
-
-  bool Read(R* msg) GRPC_OVERRIDE {
-    CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
-    if (!context_->initial_metadata_received_) {
-      ops.RecvInitialMetadata(context_);
-    }
-    ops.RecvMessage(msg);
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops) && ops.got_message;
-  }
-
-  Status Finish() GRPC_OVERRIDE {
-    CallOpSet<CallOpClientRecvStatus> ops;
-    Status status;
-    ops.ClientRecvStatus(context_, &status);
-    call_.PerformOps(&ops);
-    GPR_ASSERT(cq_.Pluck(&ops));
-    return status;
-  }
-
- private:
-  ClientContext* context_;
-  CompletionQueue cq_;
-  Call call_;
-};
-
-/// Client-side interface for streaming writes of message of type \a W.
-template <class W>
-class ClientWriterInterface : public ClientStreamingInterface,
-                              public WriterInterface<W> {
- public:
-  /// Half close writing from the client.
-  /// Block until writes are completed.
-  ///
-  /// \return Whether the writes were successful.
-  virtual bool WritesDone() = 0;
-};
-
-template <class W>
-class ClientWriter : public ClientWriterInterface<W> {
- public:
-  /// Blocking create a stream.
-  template <class R>
-  ClientWriter(Channel* channel, const RpcMethod& method,
-               ClientContext* context, R* response)
-      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
-    finish_ops_.RecvMessage(response);
-
-    CallOpSet<CallOpSendInitialMetadata> ops;
-    ops.SendInitialMetadata(context->send_initial_metadata_);
-    call_.PerformOps(&ops);
-    cq_.Pluck(&ops);
-  }
-
-  using WriterInterface<W>::Write;
-  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
-    CallOpSet<CallOpSendMessage> ops;
-    if (!ops.SendMessage(msg, options).ok()) {
-      return false;
-    }
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops);
-  }
-
-  bool WritesDone() GRPC_OVERRIDE {
-    CallOpSet<CallOpClientSendClose> ops;
-    ops.ClientSendClose();
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops);
-  }
-
-  /// Read the final response and wait for the final status.
-  Status Finish() GRPC_OVERRIDE {
-    Status status;
-    finish_ops_.ClientRecvStatus(context_, &status);
-    call_.PerformOps(&finish_ops_);
-    GPR_ASSERT(cq_.Pluck(&finish_ops_));
-    return status;
-  }
-
- private:
-  ClientContext* context_;
-  CallOpSet<CallOpGenericRecvMessage, CallOpClientRecvStatus> finish_ops_;
-  CompletionQueue cq_;
-  Call call_;
-};
-
-/// Client-side interface for bi-directional streaming.
-template <class W, class R>
-class ClientReaderWriterInterface : public ClientStreamingInterface,
-                                    public WriterInterface<W>,
-                                    public ReaderInterface<R> {
- public:
-  /// Blocking wait for initial metadata from server. The received metadata
-  /// can only be accessed after this call returns. Should only be called before
-  /// the first read. Calling this method is optional, and if it is not called
-  /// the metadata will be available in ClientContext after the first read.
-  virtual void WaitForInitialMetadata() = 0;
-
-  /// Block until writes are completed.
-  ///
-  /// \return Whether the writes were successful.
-  virtual bool WritesDone() = 0;
-};
-
-template <class W, class R>
-class ClientReaderWriter GRPC_FINAL : public ClientReaderWriterInterface<W, R> {
- public:
-  /// Blocking create a stream.
-  ClientReaderWriter(Channel* channel, const RpcMethod& method,
-                     ClientContext* context)
-      : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
-    CallOpSet<CallOpSendInitialMetadata> ops;
-    ops.SendInitialMetadata(context->send_initial_metadata_);
-    call_.PerformOps(&ops);
-    cq_.Pluck(&ops);
-  }
-
-  void WaitForInitialMetadata() GRPC_OVERRIDE {
-    GPR_ASSERT(!context_->initial_metadata_received_);
-
-    CallOpSet<CallOpRecvInitialMetadata> ops;
-    ops.RecvInitialMetadata(context_);
-    call_.PerformOps(&ops);
-    cq_.Pluck(&ops);  // status ignored
-  }
-
-  bool Read(R* msg) GRPC_OVERRIDE {
-    CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
-    if (!context_->initial_metadata_received_) {
-      ops.RecvInitialMetadata(context_);
-    }
-    ops.RecvMessage(msg);
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops) && ops.got_message;
-  }
-
-  using WriterInterface<W>::Write;
-  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
-    CallOpSet<CallOpSendMessage> ops;
-    if (!ops.SendMessage(msg, options).ok()) return false;
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops);
-  }
-
-  bool WritesDone() GRPC_OVERRIDE {
-    CallOpSet<CallOpClientSendClose> ops;
-    ops.ClientSendClose();
-    call_.PerformOps(&ops);
-    return cq_.Pluck(&ops);
-  }
-
-  Status Finish() GRPC_OVERRIDE {
-    CallOpSet<CallOpClientRecvStatus> ops;
-    Status status;
-    ops.ClientRecvStatus(context_, &status);
-    call_.PerformOps(&ops);
-    GPR_ASSERT(cq_.Pluck(&ops));
-    return status;
-  }
-
- private:
-  ClientContext* context_;
-  CompletionQueue cq_;
-  Call call_;
-};
-
-template <class R>
-class ServerReader GRPC_FINAL : public ReaderInterface<R> {
- public:
-  ServerReader(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
-
-  void SendInitialMetadata() {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    CallOpSet<CallOpSendInitialMetadata> ops;
-    ops.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_->PerformOps(&ops);
-    call_->cq()->Pluck(&ops);
-  }
-
-  bool Read(R* msg) GRPC_OVERRIDE {
-    CallOpSet<CallOpRecvMessage<R>> ops;
-    ops.RecvMessage(msg);
-    call_->PerformOps(&ops);
-    return call_->cq()->Pluck(&ops) && ops.got_message;
-  }
-
- private:
-  Call* const call_;
-  ServerContext* const ctx_;
-};
-
-template <class W>
-class ServerWriter GRPC_FINAL : public WriterInterface<W> {
- public:
-  ServerWriter(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
-
-  void SendInitialMetadata() {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    CallOpSet<CallOpSendInitialMetadata> ops;
-    ops.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_->PerformOps(&ops);
-    call_->cq()->Pluck(&ops);
-  }
-
-  using WriterInterface<W>::Write;
-  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
-    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
-    if (!ops.SendMessage(msg, options).ok()) {
-      return false;
-    }
-    if (!ctx_->sent_initial_metadata_) {
-      ops.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    call_->PerformOps(&ops);
-    return call_->cq()->Pluck(&ops);
-  }
-
- private:
-  Call* const call_;
-  ServerContext* const ctx_;
-};
-
-/// Server-side interface for bi-directional streaming.
-template <class W, class R>
-class ServerReaderWriter GRPC_FINAL : public WriterInterface<W>,
-                                      public ReaderInterface<R> {
- public:
-  ServerReaderWriter(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
-
-  void SendInitialMetadata() {
-    GPR_ASSERT(!ctx_->sent_initial_metadata_);
-
-    CallOpSet<CallOpSendInitialMetadata> ops;
-    ops.SendInitialMetadata(ctx_->initial_metadata_);
-    ctx_->sent_initial_metadata_ = true;
-    call_->PerformOps(&ops);
-    call_->cq()->Pluck(&ops);
-  }
-
-  bool Read(R* msg) GRPC_OVERRIDE {
-    CallOpSet<CallOpRecvMessage<R>> ops;
-    ops.RecvMessage(msg);
-    call_->PerformOps(&ops);
-    return call_->cq()->Pluck(&ops) && ops.got_message;
-  }
-
-  using WriterInterface<W>::Write;
-  bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
-    CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
-    if (!ops.SendMessage(msg, options).ok()) {
-      return false;
-    }
-    if (!ctx_->sent_initial_metadata_) {
-      ops.SendInitialMetadata(ctx_->initial_metadata_);
-      ctx_->sent_initial_metadata_ = true;
-    }
-    call_->PerformOps(&ops);
-    return call_->cq()->Pluck(&ops);
-  }
-
- private:
-  Call* const call_;
-  ServerContext* const ctx_;
-};
-
-}  // namespace grpc
+#include <grpc++/impl/codegen/sync_stream.h>
 
 #endif  // GRPCXX_SUPPORT_SYNC_STREAM_H
diff --git a/include/grpc++/support/time.h b/include/grpc++/support/time.h
index e00e0d8e9172240d9f9e992e0065cdbfe0bd9658..f0b758f254bdd5d98f0f904ea5c672c38aacad2f 100644
--- a/include/grpc++/support/time.h
+++ b/include/grpc++/support/time.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,78 +34,6 @@
 #ifndef GRPCXX_SUPPORT_TIME_H
 #define GRPCXX_SUPPORT_TIME_H
 
-#include <grpc++/support/config.h>
-#include <grpc/support/time.h>
-
-namespace grpc {
-
-/* If you are trying to use CompletionQueue::AsyncNext with a time class that
-   isn't either gpr_timespec or std::chrono::system_clock::time_point, you
-   will most likely be looking at this comment as your compiler will have
-   fired an error below. In order to fix this issue, you have two potential
-   solutions:
-
-     1. Use gpr_timespec or std::chrono::system_clock::time_point instead
-     2. Specialize the TimePoint class with whichever time class that you
-        want to use here. See below for two examples of how to do this.
- */
-
-template <typename T>
-class TimePoint {
- public:
-  TimePoint(const T& time) { you_need_a_specialization_of_TimePoint(); }
-  gpr_timespec raw_time() {
-    gpr_timespec t;
-    return t;
-  }
-
- private:
-  void you_need_a_specialization_of_TimePoint();
-};
-
-template <>
-class TimePoint<gpr_timespec> {
- public:
-  TimePoint(const gpr_timespec& time) : time_(time) {}
-  gpr_timespec raw_time() { return time_; }
-
- private:
-  gpr_timespec time_;
-};
-
-}  // namespace grpc
-
-#ifndef GRPC_CXX0X_NO_CHRONO
-
-#include <chrono>
-
-#include <grpc/support/time.h>
-
-namespace grpc {
-
-// from and to should be absolute time.
-void Timepoint2Timespec(const std::chrono::system_clock::time_point& from,
-                        gpr_timespec* to);
-void TimepointHR2Timespec(
-    const std::chrono::high_resolution_clock::time_point& from,
-    gpr_timespec* to);
-
-std::chrono::system_clock::time_point Timespec2Timepoint(gpr_timespec t);
-
-template <>
-class TimePoint<std::chrono::system_clock::time_point> {
- public:
-  TimePoint(const std::chrono::system_clock::time_point& time) {
-    Timepoint2Timespec(time, &time_);
-  }
-  gpr_timespec raw_time() const { return time_; }
-
- private:
-  gpr_timespec time_;
-};
-
-}  // namespace grpc
-
-#endif  // !GRPC_CXX0X_NO_CHRONO
+#include <grpc++/impl/codegen/time.h>
 
 #endif  // GRPCXX_SUPPORT_TIME_H
diff --git a/include/grpc/byte_buffer.h b/include/grpc/byte_buffer.h
index ffc5982bc034cf2243e52e341ef0364922cc0bba..fa1fd24df9442afc43b321213cf306937c08befe 100644
--- a/include/grpc/byte_buffer.h
+++ b/include/grpc/byte_buffer.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,87 +34,6 @@
 #ifndef GRPC_BYTE_BUFFER_H
 #define GRPC_BYTE_BUFFER_H
 
-#include <grpc/compression.h>
-#include <grpc/support/slice_buffer.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
-  GRPC_BB_RAW
-  /* Future types may include GRPC_BB_PROTOBUF, etc. */
-} grpc_byte_buffer_type;
-
-struct grpc_byte_buffer {
-  void *reserved;
-  grpc_byte_buffer_type type;
-  union {
-    struct {
-      void *reserved[8];
-    } reserved;
-    struct {
-      grpc_compression_algorithm compression;
-      gpr_slice_buffer slice_buffer;
-    } raw;
-  } data;
-};
-typedef struct grpc_byte_buffer grpc_byte_buffer;
-
-/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
-                                              size_t nslices);
-
-/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
- * \a nslices). The \a compression argument defines the compression algorithm
- * used to generate the data in \a slices.
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
-    gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
-
-/** Copies input byte buffer \a bb.
- *
- * Increases the reference count of all the source slices. The user is
- * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
-grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
-
-/** Returns the size of the given byte buffer, in bytes. */
-size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
-
-/** Destroys \a byte_buffer deallocating all its memory. */
-void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
-
-/** Reader for byte buffers. Iterates over slices in the byte buffer */
-struct grpc_byte_buffer_reader;
-typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
-
-/** Initialize \a reader to read over \a buffer */
-void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
-                                  grpc_byte_buffer *buffer);
-
-/** Cleanup and destroy \a reader */
-void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
-
-/** Updates \a slice with the next piece of data from from \a reader and returns
- * 1. Returns 0 at the end of the stream. Caller is responsible for calling
- * gpr_slice_unref on the result. */
-int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                 gpr_slice *slice);
-
-/** Merge all data from \a reader into single slice */
-gpr_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
-
-/** Returns a RAW byte buffer instance from the output of \a reader. */
-grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
-    grpc_byte_buffer_reader *reader);
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/byte_buffer.h>
 
 #endif /* GRPC_BYTE_BUFFER_H */
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index 31d048ba93c0f54f1552a5375d8bc5176527ff77..f0652a30349596e1671f45c2ebb565444bad7596 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,38 +36,13 @@
 
 #include <stdlib.h>
 
-#include <grpc/support/port_platform.h>
+#include <grpc/impl/codegen/port_platform.h>
+#include <grpc/impl/codegen/compression_types.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/** To be used in channel arguments */
-#define GRPC_COMPRESSION_ALGORITHM_ARG "grpc.compression_algorithm"
-#define GRPC_COMPRESSION_ALGORITHM_STATE_ARG "grpc.compression_algorithm_state"
-
-/* The various compression algorithms supported by GRPC */
-typedef enum {
-  GRPC_COMPRESS_NONE = 0,
-  GRPC_COMPRESS_DEFLATE,
-  GRPC_COMPRESS_GZIP,
-  /* TODO(ctiller): snappy */
-  GRPC_COMPRESS_ALGORITHMS_COUNT
-} grpc_compression_algorithm;
-
-typedef enum {
-  GRPC_COMPRESS_LEVEL_NONE = 0,
-  GRPC_COMPRESS_LEVEL_LOW,
-  GRPC_COMPRESS_LEVEL_MED,
-  GRPC_COMPRESS_LEVEL_HIGH,
-  GRPC_COMPRESS_LEVEL_COUNT
-} grpc_compression_level;
-
-typedef struct grpc_compression_options {
-  uint32_t enabled_algorithms_bitset; /**< All algs are enabled by default */
-  grpc_compression_algorithm default_compression_algorithm; /**< for channel */
-} grpc_compression_options;
-
 /** Parses the first \a name_length bytes of \a name as a
  * grpc_compression_algorithm instance, updating \a algorithm. Returns 1 upon
  * success, 0 otherwise. */
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index 952e86ea49d2904852e74d9ea9320c69ee5997e7..6ebf2a3f3c7dee7941193b4d6bf2dd1ea708d93e 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -40,6 +40,9 @@
 #include <grpc/byte_buffer.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/time.h>
+#include <grpc/impl/codegen/connectivity_state.h>
+#include <grpc/impl/codegen/propagation_bits.h>
+#include <grpc/impl/codegen/grpc_types.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -52,349 +55,12 @@ extern "C" {
  * functionality lives in grpc_security.h.
  */
 
-/** Completion Queues enable notification of the completion of asynchronous
-    actions. */
-typedef struct grpc_completion_queue grpc_completion_queue;
-
-/** An alarm associated with a completion queue. */
-typedef struct grpc_alarm grpc_alarm;
-
-/** The Channel interface allows creation of Call objects. */
-typedef struct grpc_channel grpc_channel;
-
-/** A server listens to some port and responds to request calls */
-typedef struct grpc_server grpc_server;
-
-/** A Call represents an RPC. When created, it is in a configuration state
-    allowing properties to be set until it is invoked. After invoke, the Call
-    can have messages written to it and read from it. */
-typedef struct grpc_call grpc_call;
-
-/** Type specifier for grpc_arg */
-typedef enum {
-  GRPC_ARG_STRING,
-  GRPC_ARG_INTEGER,
-  GRPC_ARG_POINTER
-} grpc_arg_type;
-
-/** A single argument... each argument has a key and a value
-
-    A note on naming keys:
-      Keys are namespaced into groups, usually grouped by library, and are
-      keys for module XYZ are named XYZ.key1, XYZ.key2, etc. Module names must
-      be restricted to the regex [A-Za-z][_A-Za-z0-9]{,15}.
-      Key names must be restricted to the regex [A-Za-z][_A-Za-z0-9]{,47}.
-
-    GRPC core library keys are prefixed by grpc.
-
-    Library authors are strongly encouraged to \#define symbolic constants for
-    their keys so that it's possible to change them in the future. */
-typedef struct {
-  grpc_arg_type type;
-  char *key;
-  union {
-    char *string;
-    int integer;
-    struct {
-      void *p;
-      void *(*copy)(void *p);
-      void (*destroy)(void *p);
-    } pointer;
-  } value;
-} grpc_arg;
-
-/** An array of arguments that can be passed around.
-
-    Used to set optional channel-level configuration.
-    These configuration options are modelled as key-value pairs as defined
-    by grpc_arg; keys are strings to allow easy backwards-compatible extension
-    by arbitrary parties.
-    All evaluation is performed at channel creation time (i.e. the values in
-    this structure need only live through the creation invocation). */
-typedef struct {
-  size_t num_args;
-  grpc_arg *args;
-} grpc_channel_args;
-
-/* Channel argument keys: */
-/** Enable census for tracing and stats collection */
-#define GRPC_ARG_ENABLE_CENSUS "grpc.census"
-/** Maximum number of concurrent incoming streams to allow on a http2
-    connection */
-#define GRPC_ARG_MAX_CONCURRENT_STREAMS "grpc.max_concurrent_streams"
-/** Maximum message length that the channel can receive */
-#define GRPC_ARG_MAX_MESSAGE_LENGTH "grpc.max_message_length"
-/** Initial sequence number for http2 transports */
-#define GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER \
-  "grpc.http2.initial_sequence_number"
-/** Amount to read ahead on individual streams. Defaults to 64kb, larger
-    values can help throughput on high-latency connections.
-    NOTE: at some point we'd like to auto-tune this, and this parameter
-    will become a no-op. */
-#define GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES "grpc.http2.lookahead_bytes"
-/** How much memory to use for hpack decoding */
-#define GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER \
-  "grpc.http2.hpack_table_size.decoder"
-/** How much memory to use for hpack encoding */
-#define GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER \
-  "grpc.http2.hpack_table_size.encoder"
-/** Default authority to pass if none specified on call construction */
-#define GRPC_ARG_DEFAULT_AUTHORITY "grpc.default_authority"
-/** Primary user agent: goes at the start of the user-agent metadata
-    sent on each request */
-#define GRPC_ARG_PRIMARY_USER_AGENT_STRING "grpc.primary_user_agent"
-/** Secondary user agent: goes at the end of the user-agent metadata
-    sent on each request */
-#define GRPC_ARG_SECONDARY_USER_AGENT_STRING "grpc.secondary_user_agent"
-/* The caller of the secure_channel_create functions may override the target
-   name used for SSL host name checking using this channel argument which is of
-   type GRPC_ARG_STRING. This *should* be used for testing only.
-   If this argument is not specified, the name used for SSL host name checking
-   will be the target parameter (assuming that the secure channel is an SSL
-   channel). If this parameter is specified and the underlying is not an SSL
-   channel, it will just be ignored. */
-#define GRPC_SSL_TARGET_NAME_OVERRIDE_ARG "grpc.ssl_target_name_override"
-
-/** Connectivity state of a channel. */
-typedef enum {
-  /** channel is idle */
-  GRPC_CHANNEL_IDLE,
-  /** channel is connecting */
-  GRPC_CHANNEL_CONNECTING,
-  /** channel is ready for work */
-  GRPC_CHANNEL_READY,
-  /** channel has seen a failure but expects to recover */
-  GRPC_CHANNEL_TRANSIENT_FAILURE,
-  /** channel has seen a failure that it cannot recover from */
-  GRPC_CHANNEL_FATAL_FAILURE
-} grpc_connectivity_state;
-
-/** Result of a grpc call. If the caller satisfies the prerequisites of a
-    particular operation, the grpc_call_error returned will be GRPC_CALL_OK.
-    Receiving any other value listed here is an indication of a bug in the
-    caller. */
-typedef enum grpc_call_error {
-  /** everything went ok */
-  GRPC_CALL_OK = 0,
-  /** something failed, we don't know what */
-  GRPC_CALL_ERROR,
-  /** this method is not available on the server */
-  GRPC_CALL_ERROR_NOT_ON_SERVER,
-  /** this method is not available on the client */
-  GRPC_CALL_ERROR_NOT_ON_CLIENT,
-  /** this method must be called before server_accept */
-  GRPC_CALL_ERROR_ALREADY_ACCEPTED,
-  /** this method must be called before invoke */
-  GRPC_CALL_ERROR_ALREADY_INVOKED,
-  /** this method must be called after invoke */
-  GRPC_CALL_ERROR_NOT_INVOKED,
-  /** this call is already finished
-      (writes_done or write_status has already been called) */
-  GRPC_CALL_ERROR_ALREADY_FINISHED,
-  /** there is already an outstanding read/write operation on the call */
-  GRPC_CALL_ERROR_TOO_MANY_OPERATIONS,
-  /** the flags value was illegal for this call */
-  GRPC_CALL_ERROR_INVALID_FLAGS,
-  /** invalid metadata was passed to this call */
-  GRPC_CALL_ERROR_INVALID_METADATA,
-  /** invalid message was passed to this call */
-  GRPC_CALL_ERROR_INVALID_MESSAGE,
-  /** completion queue for notification has not been registered with the
-      server */
-  GRPC_CALL_ERROR_NOT_SERVER_COMPLETION_QUEUE,
-  /** this batch of operations leads to more operations than allowed */
-  GRPC_CALL_ERROR_BATCH_TOO_BIG
-} grpc_call_error;
-
-/* Write Flags: */
-/** Hint that the write may be buffered and need not go out on the wire
-    immediately. GRPC is free to buffer the message until the next non-buffered
-    write, or until writes_done, but it need not buffer completely or at all. */
-#define GRPC_WRITE_BUFFER_HINT (0x00000001u)
-/** Force compression to be disabled for a particular write
-    (start_write/add_metadata). Illegal on invoke/accept. */
-#define GRPC_WRITE_NO_COMPRESS (0x00000002u)
-/** Mask of all valid flags. */
-#define GRPC_WRITE_USED_MASK (GRPC_WRITE_BUFFER_HINT | GRPC_WRITE_NO_COMPRESS)
-
-/** A single metadata element */
-typedef struct grpc_metadata {
-  const char *key;
-  const char *value;
-  size_t value_length;
-  uint32_t flags;
-
-  /** The following fields are reserved for grpc internal use.
-      There is no need to initialize them, and they will be set to garbage
-      during calls to grpc. */
-  struct {
-    void *obfuscated[4];
-  } internal_data;
-} grpc_metadata;
-
-/** The type of completion (for grpc_event) */
-typedef enum grpc_completion_type {
-  /** Shutting down */
-  GRPC_QUEUE_SHUTDOWN,
-  /** No event before timeout */
-  GRPC_QUEUE_TIMEOUT,
-  /** Operation completion */
-  GRPC_OP_COMPLETE
-} grpc_completion_type;
-
-/** The result of an operation.
-
-    Returned by a completion queue when the operation started with tag. */
-typedef struct grpc_event {
-  /** The type of the completion. */
-  grpc_completion_type type;
-  /** non-zero if the operation was successful, 0 upon failure.
-      Only GRPC_OP_COMPLETE can succeed or fail. */
-  int success;
-  /** The tag passed to grpc_call_start_batch etc to start this operation.
-      Only GRPC_OP_COMPLETE has a tag. */
-  void *tag;
-} grpc_event;
-
-typedef struct {
-  size_t count;
-  size_t capacity;
-  grpc_metadata *metadata;
-} grpc_metadata_array;
-
 void grpc_metadata_array_init(grpc_metadata_array *array);
 void grpc_metadata_array_destroy(grpc_metadata_array *array);
 
-typedef struct {
-  char *method;
-  size_t method_capacity;
-  char *host;
-  size_t host_capacity;
-  gpr_timespec deadline;
-  void *reserved;
-} grpc_call_details;
-
 void grpc_call_details_init(grpc_call_details *details);
 void grpc_call_details_destroy(grpc_call_details *details);
 
-typedef enum {
-  /** Send initial metadata: one and only one instance MUST be sent for each
-      call, unless the call was cancelled - in which case this can be skipped.
-      This op completes after all bytes of metadata have been accepted by
-      outgoing flow control. */
-  GRPC_OP_SEND_INITIAL_METADATA = 0,
-  /** Send a message: 0 or more of these operations can occur for each call.
-      This op completes after all bytes for the message have been accepted by
-      outgoing flow control. */
-  GRPC_OP_SEND_MESSAGE,
-  /** Send a close from the client: one and only one instance MUST be sent from
-      the client, unless the call was cancelled - in which case this can be
-      skipped.
-      This op completes after all bytes for the call (including the close)
-      have passed outgoing flow control. */
-  GRPC_OP_SEND_CLOSE_FROM_CLIENT,
-  /** Send status from the server: one and only one instance MUST be sent from
-      the server unless the call was cancelled - in which case this can be
-      skipped.
-      This op completes after all bytes for the call (including the status)
-      have passed outgoing flow control. */
-  GRPC_OP_SEND_STATUS_FROM_SERVER,
-  /** Receive initial metadata: one and only one MUST be made on the client,
-      must not be made on the server.
-      This op completes after all initial metadata has been read from the
-      peer. */
-  GRPC_OP_RECV_INITIAL_METADATA,
-  /** Receive a message: 0 or more of these operations can occur for each call.
-      This op completes after all bytes of the received message have been
-      read, or after a half-close has been received on this call. */
-  GRPC_OP_RECV_MESSAGE,
-  /** Receive status on the client: one and only one must be made on the client.
-      This operation always succeeds, meaning ops paired with this operation
-      will also appear to succeed, even though they may not have. In that case
-      the status will indicate some failure.
-      This op completes after all activity on the call has completed. */
-  GRPC_OP_RECV_STATUS_ON_CLIENT,
-  /** Receive close on the server: one and only one must be made on the
-      server.
-      This op completes after the close has been received by the server. */
-  GRPC_OP_RECV_CLOSE_ON_SERVER
-} grpc_op_type;
-
-/** Operation data: one field for each op type (except SEND_CLOSE_FROM_CLIENT
-   which has no arguments) */
-typedef struct grpc_op {
-  /** Operation type, as defined by grpc_op_type */
-  grpc_op_type op;
-  /** Write flags bitset for grpc_begin_messages */
-  uint32_t flags;
-  /** Reserved for future usage */
-  void *reserved;
-  union {
-    /** Reserved for future usage */
-    struct {
-      void *reserved[8];
-    } reserved;
-    struct {
-      size_t count;
-      grpc_metadata *metadata;
-    } send_initial_metadata;
-    grpc_byte_buffer *send_message;
-    struct {
-      size_t trailing_metadata_count;
-      grpc_metadata *trailing_metadata;
-      grpc_status_code status;
-      const char *status_details;
-    } send_status_from_server;
-    /** ownership of the array is with the caller, but ownership of the elements
-        stays with the call object (ie key, value members are owned by the call
-        object, recv_initial_metadata->array is owned by the caller).
-        After the operation completes, call grpc_metadata_array_destroy on this
-        value, or reuse it in a future op. */
-    grpc_metadata_array *recv_initial_metadata;
-    /** ownership of the byte buffer is moved to the caller; the caller must
-        call grpc_byte_buffer_destroy on this value, or reuse it in a future op.
-       */
-    grpc_byte_buffer **recv_message;
-    struct {
-      /** ownership of the array is with the caller, but ownership of the
-          elements stays with the call object (ie key, value members are owned
-          by the call object, trailing_metadata->array is owned by the caller).
-          After the operation completes, call grpc_metadata_array_destroy on
-         this
-          value, or reuse it in a future op. */
-      grpc_metadata_array *trailing_metadata;
-      grpc_status_code *status;
-      /** status_details is a buffer owned by the application before the op
-          completes and after the op has completed. During the operation
-          status_details may be reallocated to a size larger than
-          *status_details_capacity, in which case *status_details_capacity will
-          be updated with the new array capacity.
-
-          Pre-allocating space:
-          size_t my_capacity = 8;
-          char *my_details = gpr_malloc(my_capacity);
-          x.status_details = &my_details;
-          x.status_details_capacity = &my_capacity;
-
-          Not pre-allocating space:
-          size_t my_capacity = 0;
-          char *my_details = NULL;
-          x.status_details = &my_details;
-          x.status_details_capacity = &my_capacity;
-
-          After the call:
-          gpr_free(my_details); */
-      char **status_details;
-      size_t *status_details_capacity;
-    } recv_status_on_client;
-    struct {
-      /** out argument, set to 1 if the call failed in any way (seen as a
-          cancellation on the server), or 0 if the call succeeded */
-      int *cancelled;
-    } recv_close_on_server;
-  } data;
-} grpc_op;
-
 /** Registers a plugin to be initialized and destroyed with the library.
 
     The \a init and \a destroy functions will be invoked as part of
@@ -405,26 +71,6 @@ typedef struct grpc_op {
     the reverse order they were initialized. */
 void grpc_register_plugin(void (*init)(void), void (*destroy)(void));
 
-/* Propagation bits: this can be bitwise or-ed to form propagation_mask for
- * grpc_call */
-/** Propagate deadline */
-#define GRPC_PROPAGATE_DEADLINE ((uint32_t)1)
-/** Propagate census context */
-#define GRPC_PROPAGATE_CENSUS_STATS_CONTEXT ((uint32_t)2)
-#define GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT ((uint32_t)4)
-/** Propagate cancellation */
-#define GRPC_PROPAGATE_CANCELLATION ((uint32_t)8)
-
-/* Default propagation mask: clients of the core API are encouraged to encode
-   deltas from this in their implementations... ie write:
-   GRPC_PROPAGATE_DEFAULTS & ~GRPC_PROPAGATE_DEADLINE to disable deadline
-   propagation. Doing so gives flexibility in the future to define new
-   propagation types that are default inherited or not. */
-#define GRPC_PROPAGATE_DEFAULTS                                                \
-  ((uint32_t)((                                                                \
-      0xffff | GRPC_PROPAGATE_DEADLINE | GRPC_PROPAGATE_CENSUS_STATS_CONTEXT | \
-      GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT | GRPC_PROPAGATE_CANCELLATION)))
-
 /** Initialize the grpc library.
 
     It is not safe to call any other grpc functions before calling this.
diff --git a/include/grpc/impl/codegen/alloc.h b/include/grpc/impl/codegen/alloc.h
new file mode 100644
index 0000000000000000000000000000000000000000..6c3cc7873030e51473e7949a58730f5db28444af
--- /dev/null
+++ b/include/grpc/impl/codegen/alloc.h
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ALLOC_H
+#define GRPC_IMPL_CODEGEN_ALLOC_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct gpr_allocation_functions {
+  void *(*malloc_fn)(size_t size);
+  void *(*realloc_fn)(void *ptr, size_t size);
+  void (*free_fn)(void *ptr);
+} gpr_allocation_functions;
+
+/* malloc, never returns NULL */
+void *gpr_malloc(size_t size);
+/* free */
+void gpr_free(void *ptr);
+/* realloc, never returns NULL */
+void *gpr_realloc(void *p, size_t size);
+/* aligned malloc, never returns NULL, will align to 1 << alignment_log */
+void *gpr_malloc_aligned(size_t size, size_t alignment_log);
+/* free memory allocated by gpr_malloc_aligned */
+void gpr_free_aligned(void *ptr);
+
+/** Request the family of allocation functions in \a functions be used. NOTE
+ * that this request will be honored in a *best effort* basis and that no
+ * guarantees are made about the default functions (eg, malloc) being called. */
+void gpr_set_allocation_functions(gpr_allocation_functions functions);
+
+/** Return the family of allocation functions currently in effect. */
+gpr_allocation_functions gpr_get_allocation_functions();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_ALLOC_H */
diff --git a/include/grpc/impl/codegen/atm.h b/include/grpc/impl/codegen/atm.h
new file mode 100644
index 0000000000000000000000000000000000000000..35b97506ac96e8a6a74711954c1a2a7ce571e67e
--- /dev/null
+++ b/include/grpc/impl/codegen/atm.h
@@ -0,0 +1,92 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_H
+#define GRPC_IMPL_CODEGEN_ATM_H
+
+/* This interface provides atomic operations and barriers.
+   It is internal to gpr support code and should not be used outside it.
+
+   If an operation with acquire semantics precedes another memory access by the
+   same thread, the operation will precede that other access as seen by other
+   threads.
+
+   If an operation with release semantics follows another memory access by the
+   same thread, the operation will follow that other access as seen by other
+   threads.
+
+   Routines with "acq" or "full" in the name have acquire semantics.  Routines
+   with "rel" or "full" in the name have release semantics.  Routines with
+   "no_barrier" in the name have neither acquire not release semantics.
+
+   The routines may be implemented as macros.
+
+   // Atomic operations act on an intergral_type gpr_atm that is guaranteed to
+   // be the same size as a pointer.
+   typedef intptr_t gpr_atm;
+
+   // A memory barrier, providing both acquire and release semantics, but not
+   // otherwise acting on memory.
+   void gpr_atm_full_barrier(void);
+
+   // Atomically return *p, with acquire semantics.
+   gpr_atm gpr_atm_acq_load(gpr_atm *p);
+
+   // Atomically set *p = value, with release semantics.
+   void gpr_atm_rel_store(gpr_atm *p, gpr_atm value);
+
+   // Atomically add delta to *p, and return the old value of *p, with
+   // the barriers specified.
+   gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p, gpr_atm delta);
+   gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta);
+
+   // Atomically, if *p==o, set *p=n and return non-zero otherwise return 0,
+   // with the barriers specified if the operation succeeds.
+   int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
+   int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
+   int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
+*/
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#if defined(GPR_GCC_ATOMIC)
+#include <grpc/impl/codegen/atm_gcc_atomic.h>
+#elif defined(GPR_GCC_SYNC)
+#include <grpc/impl/codegen/atm_gcc_sync.h>
+#elif defined(GPR_WIN32_ATOMIC)
+#include <grpc/impl/codegen/atm_win32.h>
+#else
+#error could not determine platform for atm
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_H */
diff --git a/include/grpc/impl/codegen/atm_gcc_atomic.h b/include/grpc/impl/codegen/atm_gcc_atomic.h
new file mode 100644
index 0000000000000000000000000000000000000000..196d2aeeb34ab30142f052eb539b13d905930dbf
--- /dev/null
+++ b/include/grpc/impl/codegen/atm_gcc_atomic.h
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
+#define GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
+
+/* atm_platform.h for gcc and gcc-like compilers with the
+   __atomic_* interface.  */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+
+#define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
+
+#define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
+#define gpr_atm_no_barrier_load(p) (__atomic_load_n((p), __ATOMIC_RELAXED))
+#define gpr_atm_rel_store(p, value) \
+  (__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELEASE))
+#define gpr_atm_no_barrier_store(p, value) \
+  (__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELAXED))
+
+#define gpr_atm_no_barrier_fetch_add(p, delta) \
+  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_RELAXED))
+#define gpr_atm_full_fetch_add(p, delta) \
+  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_ACQ_REL))
+
+static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
+                                     __ATOMIC_RELAXED);
+}
+
+static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
+                                     __ATOMIC_RELAXED);
+}
+
+static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
+                                     __ATOMIC_RELAXED);
+}
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H */
diff --git a/include/grpc/impl/codegen/atm_gcc_sync.h b/include/grpc/impl/codegen/atm_gcc_sync.h
new file mode 100644
index 0000000000000000000000000000000000000000..56f755949d8e18c67c7150c27db36fbc824d5146
--- /dev/null
+++ b/include/grpc/impl/codegen/atm_gcc_sync.h
@@ -0,0 +1,87 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H
+#define GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H
+
+/* variant of atm_platform.h for gcc and gcc-like compiers with __sync_*
+   interface */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+
+#define GPR_ATM_COMPILE_BARRIER_() __asm__ __volatile__("" : : : "memory")
+
+#if defined(__i386) || defined(__x86_64__)
+/* All loads are acquire loads and all stores are release stores.  */
+#define GPR_ATM_LS_BARRIER_() GPR_ATM_COMPILE_BARRIER_()
+#else
+#define GPR_ATM_LS_BARRIER_() gpr_atm_full_barrier()
+#endif
+
+#define gpr_atm_full_barrier() (__sync_synchronize())
+
+static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
+  gpr_atm value = *p;
+  GPR_ATM_LS_BARRIER_();
+  return value;
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
+  gpr_atm value = *p;
+  GPR_ATM_COMPILE_BARRIER_();
+  return value;
+}
+
+static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
+  GPR_ATM_LS_BARRIER_();
+  *p = value;
+}
+
+static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
+  GPR_ATM_COMPILE_BARRIER_();
+  *p = value;
+}
+
+#undef GPR_ATM_LS_BARRIER_
+#undef GPR_ATM_COMPILE_BARRIER_
+
+#define gpr_atm_no_barrier_fetch_add(p, delta) \
+  gpr_atm_full_fetch_add((p), (delta))
+#define gpr_atm_full_fetch_add(p, delta) (__sync_fetch_and_add((p), (delta)))
+
+#define gpr_atm_no_barrier_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+#define gpr_atm_acq_cas(p, o, n) (__sync_bool_compare_and_swap((p), (o), (n)))
+#define gpr_atm_rel_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H */
diff --git a/include/grpc/impl/codegen/atm_win32.h b/include/grpc/impl/codegen/atm_win32.h
new file mode 100644
index 0000000000000000000000000000000000000000..9d26462d84f86e055f593cb86b271fc2ebfa7f1f
--- /dev/null
+++ b/include/grpc/impl/codegen/atm_win32.h
@@ -0,0 +1,125 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_WIN32_H
+#define GRPC_IMPL_CODEGEN_ATM_WIN32_H
+
+/* Win32 variant of atm_platform.h */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+
+#define gpr_atm_full_barrier MemoryBarrier
+
+static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
+  gpr_atm result = *p;
+  gpr_atm_full_barrier();
+  return result;
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
+  /* TODO(dklempner): Can we implement something better here? */
+  return gpr_atm_acq_load(p);
+}
+
+static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
+  gpr_atm_full_barrier();
+  *p = value;
+}
+
+static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
+  /* TODO(ctiller): Can we implement something better here? */
+  gpr_atm_rel_store(p, value);
+}
+
+static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+/* InterlockedCompareExchangePointerNoFence() not available on vista or
+   windows7 */
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeRelease64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeRelease((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p,
+                                                     gpr_atm delta) {
+  /* Use the CAS operation to get pointer-sized fetch and add */
+  gpr_atm old;
+  do {
+    old = *p;
+  } while (!gpr_atm_no_barrier_cas(p, old, old + delta));
+  return old;
+}
+
+static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta) {
+  /* Use a CAS operation to get pointer-sized fetch and add */
+  gpr_atm old;
+#ifdef GPR_ARCH_64
+  do {
+    old = *p;
+  } while (old != (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG *)p,
+                                                        (LONGLONG)old + delta,
+                                                        (LONGLONG)old));
+#else
+  do {
+    old = *p;
+  } while (old != (gpr_atm)InterlockedCompareExchange(
+                      (volatile LONG *)p, (LONG)old + delta, (LONG)old));
+#endif
+  return old;
+}
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_WIN32_H */
diff --git a/include/grpc/impl/codegen/byte_buffer.h b/include/grpc/impl/codegen/byte_buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..d94c9d5d5386a725ec6971a12921d3a0f7289702
--- /dev/null
+++ b/include/grpc/impl/codegen/byte_buffer.h
@@ -0,0 +1,120 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
+#define GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
+
+#include <grpc/impl/codegen/compression_types.h>
+#include <grpc/impl/codegen/slice_buffer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+  GRPC_BB_RAW
+  /* Future types may include GRPC_BB_PROTOBUF, etc. */
+} grpc_byte_buffer_type;
+
+struct grpc_byte_buffer {
+  void *reserved;
+  grpc_byte_buffer_type type;
+  union {
+    struct {
+      void *reserved[8];
+    } reserved;
+    struct {
+      grpc_compression_algorithm compression;
+      gpr_slice_buffer slice_buffer;
+    } raw;
+  } data;
+};
+typedef struct grpc_byte_buffer grpc_byte_buffer;
+
+/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+                                              size_t nslices);
+
+/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
+ * \a nslices). The \a compression argument defines the compression algorithm
+ * used to generate the data in \a slices.
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
+    gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+
+/** Copies input byte buffer \a bb.
+ *
+ * Increases the reference count of all the source slices. The user is
+ * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
+grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
+
+/** Returns the size of the given byte buffer, in bytes. */
+size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
+
+/** Destroys \a byte_buffer deallocating all its memory. */
+void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
+
+/** Reader for byte buffers. Iterates over slices in the byte buffer */
+struct grpc_byte_buffer_reader;
+typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
+
+/** Initialize \a reader to read over \a buffer */
+void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                  grpc_byte_buffer *buffer);
+
+/** Cleanup and destroy \a reader */
+void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
+
+/** Updates \a slice with the next piece of data from from \a reader and returns
+ * 1. Returns 0 at the end of the stream. Caller is responsible for calling
+ * gpr_slice_unref on the result. */
+int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
+                                 gpr_slice *slice);
+
+/** Merge all data from \a reader into single slice */
+gpr_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
+
+/** Returns a RAW byte buffer instance from the output of \a reader. */
+grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
+    grpc_byte_buffer_reader *reader);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_BYTE_BUFFER_H */
diff --git a/include/grpc/impl/codegen/compression_types.h b/include/grpc/impl/codegen/compression_types.h
new file mode 100644
index 0000000000000000000000000000000000000000..f552d3c8a28afe8360e5826fe377dd32ca049a33
--- /dev/null
+++ b/include/grpc/impl/codegen/compression_types.h
@@ -0,0 +1,73 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
+#define GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** To be used in channel arguments */
+#define GRPC_COMPRESSION_ALGORITHM_ARG "grpc.compression_algorithm"
+#define GRPC_COMPRESSION_ALGORITHM_STATE_ARG "grpc.compression_algorithm_state"
+
+/* The various compression algorithms supported by GRPC */
+typedef enum {
+  GRPC_COMPRESS_NONE = 0,
+  GRPC_COMPRESS_DEFLATE,
+  GRPC_COMPRESS_GZIP,
+  /* TODO(ctiller): snappy */
+  GRPC_COMPRESS_ALGORITHMS_COUNT
+} grpc_compression_algorithm;
+
+typedef enum {
+  GRPC_COMPRESS_LEVEL_NONE = 0,
+  GRPC_COMPRESS_LEVEL_LOW,
+  GRPC_COMPRESS_LEVEL_MED,
+  GRPC_COMPRESS_LEVEL_HIGH,
+  GRPC_COMPRESS_LEVEL_COUNT
+} grpc_compression_level;
+
+typedef struct grpc_compression_options {
+  uint32_t enabled_algorithms_bitset; /**< All algs are enabled by default */
+  grpc_compression_algorithm default_compression_algorithm; /**< for channel */
+} grpc_compression_options;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H */
diff --git a/include/grpc/impl/codegen/connectivity_state.h b/include/grpc/impl/codegen/connectivity_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..5bb9eb8f4eeeed0fa04bbca55884127f71c341aa
--- /dev/null
+++ b/include/grpc/impl/codegen/connectivity_state.h
@@ -0,0 +1,59 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H
+#define GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Connectivity state of a channel. */
+typedef enum {
+  /** channel is idle */
+  GRPC_CHANNEL_IDLE,
+  /** channel is connecting */
+  GRPC_CHANNEL_CONNECTING,
+  /** channel is ready for work */
+  GRPC_CHANNEL_READY,
+  /** channel has seen a failure but expects to recover */
+  GRPC_CHANNEL_TRANSIENT_FAILURE,
+  /** channel has seen a failure that it cannot recover from */
+  GRPC_CHANNEL_FATAL_FAILURE
+} grpc_connectivity_state;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H */
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
new file mode 100644
index 0000000000000000000000000000000000000000..ea1e96cf1d5b1e1a7b0adc44e45bb177fbe9ad69
--- /dev/null
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -0,0 +1,373 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_GRPC_TYPES_H
+#define GRPC_IMPL_CODEGEN_GRPC_TYPES_H
+
+#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/status.h>
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Completion Queues enable notification of the completion of asynchronous
+    actions. */
+typedef struct grpc_completion_queue grpc_completion_queue;
+
+/** An alarm associated with a completion queue. */
+typedef struct grpc_alarm grpc_alarm;
+
+/** The Channel interface allows creation of Call objects. */
+typedef struct grpc_channel grpc_channel;
+
+/** A server listens to some port and responds to request calls */
+typedef struct grpc_server grpc_server;
+
+/** A Call represents an RPC. When created, it is in a configuration state
+    allowing properties to be set until it is invoked. After invoke, the Call
+    can have messages written to it and read from it. */
+typedef struct grpc_call grpc_call;
+
+/** Type specifier for grpc_arg */
+typedef enum {
+  GRPC_ARG_STRING,
+  GRPC_ARG_INTEGER,
+  GRPC_ARG_POINTER
+} grpc_arg_type;
+
+/** A single argument... each argument has a key and a value
+
+    A note on naming keys:
+      Keys are namespaced into groups, usually grouped by library, and are
+      keys for module XYZ are named XYZ.key1, XYZ.key2, etc. Module names must
+      be restricted to the regex [A-Za-z][_A-Za-z0-9]{,15}.
+      Key names must be restricted to the regex [A-Za-z][_A-Za-z0-9]{,47}.
+
+    GRPC core library keys are prefixed by grpc.
+
+    Library authors are strongly encouraged to \#define symbolic constants for
+    their keys so that it's possible to change them in the future. */
+typedef struct {
+  grpc_arg_type type;
+  char *key;
+  union {
+    char *string;
+    int integer;
+    struct {
+      void *p;
+      void *(*copy)(void *p);
+      void (*destroy)(void *p);
+    } pointer;
+  } value;
+} grpc_arg;
+
+/** An array of arguments that can be passed around.
+
+    Used to set optional channel-level configuration.
+    These configuration options are modelled as key-value pairs as defined
+    by grpc_arg; keys are strings to allow easy backwards-compatible extension
+    by arbitrary parties.
+    All evaluation is performed at channel creation time (i.e. the values in
+    this structure need only live through the creation invocation). */
+typedef struct {
+  size_t num_args;
+  grpc_arg *args;
+} grpc_channel_args;
+
+/* Channel argument keys: */
+/** Enable census for tracing and stats collection */
+#define GRPC_ARG_ENABLE_CENSUS "grpc.census"
+/** Maximum number of concurrent incoming streams to allow on a http2
+    connection */
+#define GRPC_ARG_MAX_CONCURRENT_STREAMS "grpc.max_concurrent_streams"
+/** Maximum message length that the channel can receive */
+#define GRPC_ARG_MAX_MESSAGE_LENGTH "grpc.max_message_length"
+/** Initial sequence number for http2 transports */
+#define GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER \
+  "grpc.http2.initial_sequence_number"
+/** Amount to read ahead on individual streams. Defaults to 64kb, larger
+    values can help throughput on high-latency connections.
+    NOTE: at some point we'd like to auto-tune this, and this parameter
+    will become a no-op. */
+#define GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES "grpc.http2.lookahead_bytes"
+/** How much memory to use for hpack decoding */
+#define GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER \
+  "grpc.http2.hpack_table_size.decoder"
+/** How much memory to use for hpack encoding */
+#define GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER \
+  "grpc.http2.hpack_table_size.encoder"
+/** Default authority to pass if none specified on call construction */
+#define GRPC_ARG_DEFAULT_AUTHORITY "grpc.default_authority"
+/** Primary user agent: goes at the start of the user-agent metadata
+    sent on each request */
+#define GRPC_ARG_PRIMARY_USER_AGENT_STRING "grpc.primary_user_agent"
+/** Secondary user agent: goes at the end of the user-agent metadata
+    sent on each request */
+#define GRPC_ARG_SECONDARY_USER_AGENT_STRING "grpc.secondary_user_agent"
+/* The caller of the secure_channel_create functions may override the target
+   name used for SSL host name checking using this channel argument which is of
+   type GRPC_ARG_STRING. This *should* be used for testing only.
+   If this argument is not specified, the name used for SSL host name checking
+   will be the target parameter (assuming that the secure channel is an SSL
+   channel). If this parameter is specified and the underlying is not an SSL
+   channel, it will just be ignored. */
+#define GRPC_SSL_TARGET_NAME_OVERRIDE_ARG "grpc.ssl_target_name_override"
+
+/** Result of a grpc call. If the caller satisfies the prerequisites of a
+    particular operation, the grpc_call_error returned will be GRPC_CALL_OK.
+    Receiving any other value listed here is an indication of a bug in the
+    caller. */
+typedef enum grpc_call_error {
+  /** everything went ok */
+  GRPC_CALL_OK = 0,
+  /** something failed, we don't know what */
+  GRPC_CALL_ERROR,
+  /** this method is not available on the server */
+  GRPC_CALL_ERROR_NOT_ON_SERVER,
+  /** this method is not available on the client */
+  GRPC_CALL_ERROR_NOT_ON_CLIENT,
+  /** this method must be called before server_accept */
+  GRPC_CALL_ERROR_ALREADY_ACCEPTED,
+  /** this method must be called before invoke */
+  GRPC_CALL_ERROR_ALREADY_INVOKED,
+  /** this method must be called after invoke */
+  GRPC_CALL_ERROR_NOT_INVOKED,
+  /** this call is already finished
+      (writes_done or write_status has already been called) */
+  GRPC_CALL_ERROR_ALREADY_FINISHED,
+  /** there is already an outstanding read/write operation on the call */
+  GRPC_CALL_ERROR_TOO_MANY_OPERATIONS,
+  /** the flags value was illegal for this call */
+  GRPC_CALL_ERROR_INVALID_FLAGS,
+  /** invalid metadata was passed to this call */
+  GRPC_CALL_ERROR_INVALID_METADATA,
+  /** invalid message was passed to this call */
+  GRPC_CALL_ERROR_INVALID_MESSAGE,
+  /** completion queue for notification has not been registered with the
+      server */
+  GRPC_CALL_ERROR_NOT_SERVER_COMPLETION_QUEUE,
+  /** this batch of operations leads to more operations than allowed */
+  GRPC_CALL_ERROR_BATCH_TOO_BIG
+} grpc_call_error;
+
+/* Write Flags: */
+/** Hint that the write may be buffered and need not go out on the wire
+    immediately. GRPC is free to buffer the message until the next non-buffered
+    write, or until writes_done, but it need not buffer completely or at all. */
+#define GRPC_WRITE_BUFFER_HINT (0x00000001u)
+/** Force compression to be disabled for a particular write
+    (start_write/add_metadata). Illegal on invoke/accept. */
+#define GRPC_WRITE_NO_COMPRESS (0x00000002u)
+/** Mask of all valid flags. */
+#define GRPC_WRITE_USED_MASK (GRPC_WRITE_BUFFER_HINT | GRPC_WRITE_NO_COMPRESS)
+
+/** A single metadata element */
+typedef struct grpc_metadata {
+  const char *key;
+  const char *value;
+  size_t value_length;
+  uint32_t flags;
+
+  /** The following fields are reserved for grpc internal use.
+      There is no need to initialize them, and they will be set to garbage
+      during calls to grpc. */
+  struct {
+    void *obfuscated[4];
+  } internal_data;
+} grpc_metadata;
+
+/** The type of completion (for grpc_event) */
+typedef enum grpc_completion_type {
+  /** Shutting down */
+  GRPC_QUEUE_SHUTDOWN,
+  /** No event before timeout */
+  GRPC_QUEUE_TIMEOUT,
+  /** Operation completion */
+  GRPC_OP_COMPLETE
+} grpc_completion_type;
+
+/** The result of an operation.
+
+    Returned by a completion queue when the operation started with tag. */
+typedef struct grpc_event {
+  /** The type of the completion. */
+  grpc_completion_type type;
+  /** non-zero if the operation was successful, 0 upon failure.
+      Only GRPC_OP_COMPLETE can succeed or fail. */
+  int success;
+  /** The tag passed to grpc_call_start_batch etc to start this operation.
+      Only GRPC_OP_COMPLETE has a tag. */
+  void *tag;
+} grpc_event;
+
+typedef struct {
+  size_t count;
+  size_t capacity;
+  grpc_metadata *metadata;
+} grpc_metadata_array;
+
+typedef struct {
+  char *method;
+  size_t method_capacity;
+  char *host;
+  size_t host_capacity;
+  gpr_timespec deadline;
+  void *reserved;
+} grpc_call_details;
+
+typedef enum {
+  /** Send initial metadata: one and only one instance MUST be sent for each
+      call, unless the call was cancelled - in which case this can be skipped.
+      This op completes after all bytes of metadata have been accepted by
+      outgoing flow control. */
+  GRPC_OP_SEND_INITIAL_METADATA = 0,
+  /** Send a message: 0 or more of these operations can occur for each call.
+      This op completes after all bytes for the message have been accepted by
+      outgoing flow control. */
+  GRPC_OP_SEND_MESSAGE,
+  /** Send a close from the client: one and only one instance MUST be sent from
+      the client, unless the call was cancelled - in which case this can be
+      skipped.
+      This op completes after all bytes for the call (including the close)
+      have passed outgoing flow control. */
+  GRPC_OP_SEND_CLOSE_FROM_CLIENT,
+  /** Send status from the server: one and only one instance MUST be sent from
+      the server unless the call was cancelled - in which case this can be
+      skipped.
+      This op completes after all bytes for the call (including the status)
+      have passed outgoing flow control. */
+  GRPC_OP_SEND_STATUS_FROM_SERVER,
+  /** Receive initial metadata: one and only one MUST be made on the client,
+      must not be made on the server.
+      This op completes after all initial metadata has been read from the
+      peer. */
+  GRPC_OP_RECV_INITIAL_METADATA,
+  /** Receive a message: 0 or more of these operations can occur for each call.
+      This op completes after all bytes of the received message have been
+      read, or after a half-close has been received on this call. */
+  GRPC_OP_RECV_MESSAGE,
+  /** Receive status on the client: one and only one must be made on the client.
+      This operation always succeeds, meaning ops paired with this operation
+      will also appear to succeed, even though they may not have. In that case
+      the status will indicate some failure.
+      This op completes after all activity on the call has completed. */
+  GRPC_OP_RECV_STATUS_ON_CLIENT,
+  /** Receive close on the server: one and only one must be made on the
+      server.
+      This op completes after the close has been received by the server. */
+  GRPC_OP_RECV_CLOSE_ON_SERVER
+} grpc_op_type;
+
+/** Operation data: one field for each op type (except SEND_CLOSE_FROM_CLIENT
+   which has no arguments) */
+typedef struct grpc_op {
+  /** Operation type, as defined by grpc_op_type */
+  grpc_op_type op;
+  /** Write flags bitset for grpc_begin_messages */
+  uint32_t flags;
+  /** Reserved for future usage */
+  void *reserved;
+  union {
+    /** Reserved for future usage */
+    struct {
+      void *reserved[8];
+    } reserved;
+    struct {
+      size_t count;
+      grpc_metadata *metadata;
+    } send_initial_metadata;
+    grpc_byte_buffer *send_message;
+    struct {
+      size_t trailing_metadata_count;
+      grpc_metadata *trailing_metadata;
+      grpc_status_code status;
+      const char *status_details;
+    } send_status_from_server;
+    /** ownership of the array is with the caller, but ownership of the elements
+        stays with the call object (ie key, value members are owned by the call
+        object, recv_initial_metadata->array is owned by the caller).
+        After the operation completes, call grpc_metadata_array_destroy on this
+        value, or reuse it in a future op. */
+    grpc_metadata_array *recv_initial_metadata;
+    /** ownership of the byte buffer is moved to the caller; the caller must
+        call grpc_byte_buffer_destroy on this value, or reuse it in a future op.
+       */
+    grpc_byte_buffer **recv_message;
+    struct {
+      /** ownership of the array is with the caller, but ownership of the
+          elements stays with the call object (ie key, value members are owned
+          by the call object, trailing_metadata->array is owned by the caller).
+          After the operation completes, call grpc_metadata_array_destroy on
+         this
+          value, or reuse it in a future op. */
+      grpc_metadata_array *trailing_metadata;
+      grpc_status_code *status;
+      /** status_details is a buffer owned by the application before the op
+          completes and after the op has completed. During the operation
+          status_details may be reallocated to a size larger than
+          *status_details_capacity, in which case *status_details_capacity will
+          be updated with the new array capacity.
+
+          Pre-allocating space:
+          size_t my_capacity = 8;
+          char *my_details = gpr_malloc(my_capacity);
+          x.status_details = &my_details;
+          x.status_details_capacity = &my_capacity;
+
+          Not pre-allocating space:
+          size_t my_capacity = 0;
+          char *my_details = NULL;
+          x.status_details = &my_details;
+          x.status_details_capacity = &my_capacity;
+
+          After the call:
+          gpr_free(my_details); */
+      char **status_details;
+      size_t *status_details_capacity;
+    } recv_status_on_client;
+    struct {
+      /** out argument, set to 1 if the call failed in any way (seen as a
+          cancellation on the server), or 0 if the call succeeded */
+      int *cancelled;
+    } recv_close_on_server;
+  } data;
+} grpc_op;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_GRPC_TYPES_H */
diff --git a/include/grpc/impl/codegen/log.h b/include/grpc/impl/codegen/log.h
new file mode 100644
index 0000000000000000000000000000000000000000..8445e70a891059afe1cd3674650b82a9bc2a82e0
--- /dev/null
+++ b/include/grpc/impl/codegen/log.h
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_LOG_H
+#define GRPC_IMPL_CODEGEN_LOG_H
+
+#include <stdlib.h> /* for abort() */
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* GPR log API.
+
+   Usage (within grpc):
+
+   int argument1 = 3;
+   char* argument2 = "hello";
+   gpr_log(GPR_DEBUG, "format string %d", argument1);
+   gpr_log(GPR_INFO, "hello world");
+   gpr_log(GPR_ERROR, "%d %s!!", argument1, argument2); */
+
+/* The severity of a log message - use the #defines below when calling into
+   gpr_log to additionally supply file and line data */
+typedef enum gpr_log_severity {
+  GPR_LOG_SEVERITY_DEBUG,
+  GPR_LOG_SEVERITY_INFO,
+  GPR_LOG_SEVERITY_ERROR
+} gpr_log_severity;
+
+/* Returns a string representation of the log severity */
+const char *gpr_log_severity_string(gpr_log_severity severity);
+
+/* Macros to build log contexts at various severity levels */
+#define GPR_DEBUG __FILE__, __LINE__, GPR_LOG_SEVERITY_DEBUG
+#define GPR_INFO __FILE__, __LINE__, GPR_LOG_SEVERITY_INFO
+#define GPR_ERROR __FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR
+
+/* Log a message. It's advised to use GPR_xxx above to generate the context
+ * for each message */
+void gpr_log(const char *file, int line, gpr_log_severity severity,
+             const char *format, ...);
+
+void gpr_log_message(const char *file, int line, gpr_log_severity severity,
+                     const char *message);
+
+/* Log overrides: applications can use this API to intercept logging calls
+   and use their own implementations */
+
+typedef struct {
+  const char *file;
+  int line;
+  gpr_log_severity severity;
+  const char *message;
+} gpr_log_func_args;
+
+typedef void (*gpr_log_func)(gpr_log_func_args *args);
+void gpr_set_log_function(gpr_log_func func);
+
+/* abort() the process if x is zero, having written a line to the log.
+
+   Intended for internal invariants.  If the error can be recovered from,
+   without the possibility of corruption, or might best be reflected via
+   an exception in a higher-level language, consider returning error code.  */
+#define GPR_ASSERT(x)                                 \
+  do {                                                \
+    if (!(x)) {                                       \
+      gpr_log(GPR_ERROR, "assertion failed: %s", #x); \
+      abort();                                        \
+    }                                                 \
+  } while (0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_LOG_H */
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
new file mode 100644
index 0000000000000000000000000000000000000000..b5a708e7f28a6521398b5f65baecab59b10c52cd
--- /dev/null
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -0,0 +1,340 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
+#define GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
+
+/* Get windows.h included everywhere (we need it) */
+#if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
+#ifndef WIN32_LEAN_AND_MEAN
+#define GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
+#define WIN32_LEAN_AND_MEAN
+#endif /* WIN32_LEAN_AND_MEAN */
+
+#ifndef NOMINMAX
+#define GRPC_NOMINMX_WAS_NOT_DEFINED
+#define NOMINMAX
+#endif /* NOMINMAX */
+
+#ifndef _WIN32_WINNT
+#error \
+    "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
+#else /* !defined(_WIN32_WINNT) */
+#if (_WIN32_WINNT < 0x0600)
+#error \
+    "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
+#endif /* _WIN32_WINNT < 0x0600 */
+#endif /* defined(_WIN32_WINNT) */
+
+#include <windows.h>
+
+#ifdef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
+#undef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
+#undef WIN32_LEAN_AND_MEAN
+#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
+
+#ifdef GRPC_NOMINMAX_WAS_NOT_DEFINED
+#undef GRPC_NOMINMAX_WAS_NOT_DEFINED
+#undef NOMINMAX
+#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
+#endif /* defined(_WIN64) || defined(WIN64) || defined(_WIN32) || \
+          defined(WIN32) */
+
+/* Override this file with one for your platform if you need to redefine
+   things.  */
+
+#if !defined(GPR_NO_AUTODETECT_PLATFORM)
+#if defined(_WIN64) || defined(WIN64)
+#define GPR_PLATFORM_STRING "windows"
+#define GPR_WIN32 1
+#define GPR_ARCH_64 1
+#define GPR_GETPID_IN_PROCESS_H 1
+#define GPR_WINSOCK_SOCKET 1
+#ifdef __GNUC__
+#define GPR_GCC_ATOMIC 1
+#define GPR_GCC_TLS 1
+#else
+#define GPR_WIN32_ATOMIC 1
+#define GPR_MSVC_TLS 1
+#endif
+#define GPR_WINDOWS_CRASH_HANDLER 1
+#elif defined(_WIN32) || defined(WIN32)
+#define GPR_PLATFORM_STRING "windows"
+#define GPR_ARCH_32 1
+#define GPR_WIN32 1
+#define GPR_GETPID_IN_PROCESS_H 1
+#define GPR_WINSOCK_SOCKET 1
+#ifdef __GNUC__
+#define GPR_GCC_ATOMIC 1
+#define GPR_GCC_TLS 1
+#else
+#define GPR_WIN32_ATOMIC 1
+#define GPR_MSVC_TLS 1
+#endif
+#define GPR_WINDOWS_CRASH_HANDLER 1
+#elif defined(ANDROID) || defined(__ANDROID__)
+#define GPR_PLATFORM_STRING "android"
+#define GPR_ANDROID 1
+#define GPR_ARCH_32 1
+#define GPR_CPU_LINUX 1
+#define GPR_GCC_SYNC 1
+#define GPR_GCC_TLS 1
+#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
+#define GPR_POSIX_WAKEUP_FD 1
+#define GPR_LINUX_EVENTFD 1
+#define GPR_POSIX_SOCKET 1
+#define GPR_POSIX_SOCKETADDR 1
+#define GPR_POSIX_SOCKETUTILS 1
+#define GPR_POSIX_ENV 1
+#define GPR_POSIX_FILE 1
+#define GPR_POSIX_STRING 1
+#define GPR_POSIX_SUBPROCESS 1
+#define GPR_POSIX_SYNC 1
+#define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_HAVE_MSG_NOSIGNAL 1
+#elif defined(__linux__)
+#define GPR_POSIX_CRASH_HANDLER 1
+#define GPR_PLATFORM_STRING "linux"
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE
+#endif
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <features.h>
+#define GPR_CPU_LINUX 1
+#define GPR_GCC_ATOMIC 1
+#define GPR_GCC_TLS 1
+#define GPR_LINUX 1
+#define GPR_LINUX_MULTIPOLL_WITH_EPOLL 1
+#define GPR_POSIX_WAKEUP_FD 1
+#define GPR_POSIX_SOCKET 1
+#define GPR_POSIX_SOCKETADDR 1
+#ifdef __GLIBC_PREREQ
+#if __GLIBC_PREREQ(2, 9)
+#define GPR_LINUX_EVENTFD 1
+#endif
+#if __GLIBC_PREREQ(2, 10)
+#define GPR_LINUX_SOCKETUTILS 1
+#endif
+#if __GLIBC_PREREQ(2, 17)
+#define GPR_LINUX_ENV 1
+#endif
+#endif
+#ifndef GPR_LINUX_EVENTFD
+#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
+#endif
+#ifndef GPR_LINUX_SOCKETUTILS
+#define GPR_POSIX_SOCKETUTILS
+#endif
+#ifndef GPR_LINUX_ENV
+#define GPR_POSIX_ENV 1
+#endif
+#define GPR_POSIX_FILE 1
+#define GPR_POSIX_STRING 1
+#define GPR_POSIX_SUBPROCESS 1
+#define GPR_POSIX_SYNC 1
+#define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_HAVE_MSG_NOSIGNAL 1
+#ifdef _LP64
+#define GPR_ARCH_64 1
+#else /* _LP64 */
+#define GPR_ARCH_32 1
+#endif /* _LP64 */
+#elif defined(__APPLE__)
+#include <TargetConditionals.h>
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#define GPR_MSG_IOVLEN_TYPE int
+#if TARGET_OS_IPHONE
+#define GPR_FORBID_UNREACHABLE_CODE 1
+#define GPR_PLATFORM_STRING "ios"
+#define GPR_CPU_IPHONE 1
+#define GPR_PTHREAD_TLS 1
+#else /* TARGET_OS_IPHONE */
+#define GPR_PLATFORM_STRING "osx"
+#define GPR_CPU_POSIX 1
+#define GPR_GCC_TLS 1
+#define GPR_POSIX_CRASH_HANDLER 1
+#endif
+#define GPR_GCC_ATOMIC 1
+#define GPR_POSIX_LOG 1
+#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
+#define GPR_POSIX_WAKEUP_FD 1
+#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
+#define GPR_POSIX_SOCKET 1
+#define GPR_POSIX_SOCKETADDR 1
+#define GPR_POSIX_SOCKETUTILS 1
+#define GPR_POSIX_ENV 1
+#define GPR_POSIX_FILE 1
+#define GPR_POSIX_STRING 1
+#define GPR_POSIX_SUBPROCESS 1
+#define GPR_POSIX_SYNC 1
+#define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_HAVE_SO_NOSIGPIPE 1
+#ifdef _LP64
+#define GPR_ARCH_64 1
+#else /* _LP64 */
+#define GPR_ARCH_32 1
+#endif /* _LP64 */
+#elif defined(__FreeBSD__)
+#define GPR_PLATFORM_STRING "freebsd"
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#define GPR_CPU_POSIX 1
+#define GPR_GCC_ATOMIC 1
+#define GPR_GCC_TLS 1
+#define GPR_POSIX_LOG 1
+#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
+#define GPR_POSIX_WAKEUP_FD 1
+#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
+#define GPR_POSIX_SOCKET 1
+#define GPR_POSIX_SOCKETADDR 1
+#define GPR_POSIX_SOCKETUTILS 1
+#define GPR_POSIX_ENV 1
+#define GPR_POSIX_FILE 1
+#define GPR_POSIX_STRING 1
+#define GPR_POSIX_SUBPROCESS 1
+#define GPR_POSIX_SYNC 1
+#define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
+#define GPR_HAVE_SO_NOSIGPIPE 1
+#ifdef _LP64
+#define GPR_ARCH_64 1
+#else /* _LP64 */
+#define GPR_ARCH_32 1
+#endif /* _LP64 */
+#else
+#error Could not auto-detect platform
+#endif
+#endif /* GPR_NO_AUTODETECT_PLATFORM */
+
+#ifndef GPR_PLATFORM_STRING
+#warning "GPR_PLATFORM_STRING not auto-detected"
+#define GPR_PLATFORM_STRING "unknown"
+#endif
+
+#ifdef GPR_GCOV
+#undef GPR_FORBID_UNREACHABLE_CODE
+#define GPR_FORBID_UNREACHABLE_CODE 1
+#endif
+
+/* For a common case, assume that the platform has a C99-like stdint.h */
+
+#include <stdint.h>
+
+/* Cache line alignment */
+#ifndef GPR_CACHELINE_SIZE_LOG
+#if defined(__i386__) || defined(__x86_64__)
+#define GPR_CACHELINE_SIZE_LOG 6
+#endif
+#ifndef GPR_CACHELINE_SIZE_LOG
+/* A reasonable default guess. Note that overestimates tend to waste more
+   space, while underestimates tend to waste more time. */
+#define GPR_CACHELINE_SIZE_LOG 6
+#endif /* GPR_CACHELINE_SIZE_LOG */
+#endif /* GPR_CACHELINE_SIZE_LOG */
+
+#define GPR_CACHELINE_SIZE (1 << GPR_CACHELINE_SIZE_LOG)
+
+/* scrub GCC_ATOMIC if it's not available on this compiler */
+#if defined(GPR_GCC_ATOMIC) && !defined(__ATOMIC_RELAXED)
+#undef GPR_GCC_ATOMIC
+#define GPR_GCC_SYNC 1
+#endif
+
+/* Validate platform combinations */
+#if defined(GPR_GCC_ATOMIC) + defined(GPR_GCC_SYNC) + \
+        defined(GPR_WIN32_ATOMIC) !=                  \
+    1
+#error Must define exactly one of GPR_GCC_ATOMIC, GPR_GCC_SYNC, GPR_WIN32_ATOMIC
+#endif
+
+#if defined(GPR_ARCH_32) + defined(GPR_ARCH_64) != 1
+#error Must define exactly one of GPR_ARCH_32, GPR_ARCH_64
+#endif
+
+#if defined(GPR_CPU_LINUX) + defined(GPR_CPU_POSIX) + defined(GPR_WIN32) + \
+        defined(GPR_CPU_IPHONE) + defined(GPR_CPU_CUSTOM) !=               \
+    1
+#error Must define exactly one of GPR_CPU_LINUX, GPR_CPU_POSIX, GPR_WIN32, GPR_CPU_IPHONE, GPR_CPU_CUSTOM
+#endif
+
+#if defined(GPR_POSIX_MULTIPOLL_WITH_POLL) && !defined(GPR_POSIX_SOCKET)
+#error Must define GPR_POSIX_SOCKET to use GPR_POSIX_MULTIPOLL_WITH_POLL
+#endif
+
+#if defined(GPR_POSIX_SOCKET) + defined(GPR_WINSOCK_SOCKET) + \
+        defined(GPR_CUSTOM_SOCKET) !=                         \
+    1
+#error Must define exactly one of GPR_POSIX_SOCKET, GPR_WINSOCK_SOCKET, GPR_CUSTOM_SOCKET
+#endif
+
+#if defined(GPR_MSVC_TLS) + defined(GPR_GCC_TLS) + defined(GPR_PTHREAD_TLS) + \
+        defined(GPR_CUSTOM_TLS) !=                                            \
+    1
+#error Must define exactly one of GPR_MSVC_TLS, GPR_GCC_TLS, GPR_PTHREAD_TLS, GPR_CUSTOM_TLS
+#endif
+
+/* maximum alignment needed for any type on this platform, rounded up to a
+   power of two */
+#define GPR_MAX_ALIGNMENT 16
+
+#ifndef GRPC_MUST_USE_RESULT
+#ifdef __GNUC__
+#define GRPC_MUST_USE_RESULT __attribute__((warn_unused_result))
+#else
+#define GRPC_MUST_USE_RESULT
+#endif
+#endif
+
+#if GPR_FORBID_UNREACHABLE_CODE
+#define GPR_UNREACHABLE_CODE(STATEMENT)
+#else
+#define GPR_UNREACHABLE_CODE(STATEMENT)             \
+  do {                                              \
+    gpr_log(GPR_ERROR, "Should never reach here."); \
+    abort();                                        \
+    STATEMENT;                                      \
+  } while (0)
+#endif /* GPR_FORBID_UNREACHABLE_CODE */
+
+#endif /* GRPC_IMPL_CODEGEN_PORT_PLATFORM_H */
diff --git a/include/grpc/impl/codegen/propagation_bits.h b/include/grpc/impl/codegen/propagation_bits.h
new file mode 100644
index 0000000000000000000000000000000000000000..989b86f2aad8f06531bbc61af37a8eb78582bbc3
--- /dev/null
+++ b/include/grpc/impl/codegen/propagation_bits.h
@@ -0,0 +1,67 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_H
+#define GRPC_IMPL_CODEGEN_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Propagation bits: this can be bitwise or-ed to form propagation_mask for
+ * grpc_call */
+/** Propagate deadline */
+#define GRPC_PROPAGATE_DEADLINE ((uint32_t)1)
+/** Propagate census context */
+#define GRPC_PROPAGATE_CENSUS_STATS_CONTEXT ((uint32_t)2)
+#define GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT ((uint32_t)4)
+/** Propagate cancellation */
+#define GRPC_PROPAGATE_CANCELLATION ((uint32_t)8)
+
+/* Default propagation mask: clients of the core API are encouraged to encode
+   deltas from this in their implementations... ie write:
+   GRPC_PROPAGATE_DEFAULTS & ~GRPC_PROPAGATE_DEADLINE to disable deadline
+   propagation. Doing so gives flexibility in the future to define new
+   propagation types that are default inherited or not. */
+#define GRPC_PROPAGATE_DEFAULTS                                                \
+  ((uint32_t)((                                                                \
+      0xffff | GRPC_PROPAGATE_DEADLINE | GRPC_PROPAGATE_CENSUS_STATS_CONTEXT | \
+      GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT | GRPC_PROPAGATE_CANCELLATION)))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_H */
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
new file mode 100644
index 0000000000000000000000000000000000000000..82cd27b73d7cb9fe1db08627b13a662f2151df26
--- /dev/null
+++ b/include/grpc/impl/codegen/slice.h
@@ -0,0 +1,182 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SLICE_H
+#define GRPC_IMPL_CODEGEN_SLICE_H
+
+#include <grpc/impl/codegen/sync.h>
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Slice API
+
+   A slice represents a contiguous reference counted array of bytes.
+   It is cheap to take references to a slice, and it is cheap to create a
+   slice pointing to a subset of another slice.
+
+   The data-structure for slices is exposed here to allow non-gpr code to
+   build slices from whatever data they have available.
+
+   When defining interfaces that handle slices, care should be taken to define
+   reference ownership semantics (who should call unref?) and mutability
+   constraints (is the callee allowed to modify the slice?) */
+
+/* Reference count container for gpr_slice. Contains function pointers to
+   increment and decrement reference counts. Implementations should cleanup
+   when the reference count drops to zero.
+   Typically client code should not touch this, and use gpr_slice_malloc,
+   gpr_slice_new, or gpr_slice_new_with_len instead. */
+typedef struct gpr_slice_refcount {
+  void (*ref)(void *);
+  void (*unref)(void *);
+} gpr_slice_refcount;
+
+#define GPR_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1)
+
+/* A gpr_slice s, if initialized, represents the byte range
+   s.bytes[0..s.length-1].
+
+   It can have an associated ref count which has a destruction routine to be run
+   when the ref count reaches zero (see gpr_slice_new() and grp_slice_unref()).
+   Multiple gpr_slice values may share a ref count.
+
+   If the slice does not have a refcount, it represents an inlined small piece
+   of data that is copied by value. */
+typedef struct gpr_slice {
+  struct gpr_slice_refcount *refcount;
+  union {
+    struct {
+      uint8_t *bytes;
+      size_t length;
+    } refcounted;
+    struct {
+      uint8_t length;
+      uint8_t bytes[GPR_SLICE_INLINED_SIZE];
+    } inlined;
+  } data;
+} gpr_slice;
+
+#define GPR_SLICE_START_PTR(slice)                  \
+  ((slice).refcount ? (slice).data.refcounted.bytes \
+                    : (slice).data.inlined.bytes)
+#define GPR_SLICE_LENGTH(slice)                      \
+  ((slice).refcount ? (slice).data.refcounted.length \
+                    : (slice).data.inlined.length)
+#define GPR_SLICE_SET_LENGTH(slice, newlen)                               \
+  ((slice).refcount ? ((slice).data.refcounted.length = (size_t)(newlen)) \
+                    : ((slice).data.inlined.length = (uint8_t)(newlen)))
+#define GPR_SLICE_END_PTR(slice) \
+  GPR_SLICE_START_PTR(slice) + GPR_SLICE_LENGTH(slice)
+#define GPR_SLICE_IS_EMPTY(slice) (GPR_SLICE_LENGTH(slice) == 0)
+
+/* Increment the refcount of s. Requires slice is initialized.
+   Returns s. */
+gpr_slice gpr_slice_ref(gpr_slice s);
+
+/* Decrement the ref count of s.  If the ref count of s reaches zero, all
+   slices sharing the ref count are destroyed, and considered no longer
+   initialized.  If s is ultimately derived from a call to gpr_slice_new(start,
+   len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
+   ultimately derived from a call to gpr_slice_new_with_len(start, len, dest)
+   where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
+void gpr_slice_unref(gpr_slice s);
+
+/* Create a slice pointing at some data. Calls malloc to allocate a refcount
+   for the object, and arranges that destroy will be called with the pointer
+   passed in at destruction. */
+gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
+
+/* Equivalent to gpr_slice_new, but with a two argument destroy function that
+   also takes the slice length. */
+gpr_slice gpr_slice_new_with_len(void *p, size_t len,
+                                 void (*destroy)(void *, size_t));
+
+/* Equivalent to gpr_slice_new(malloc(len), len, free), but saves one malloc()
+   call.
+   Aborts if malloc() fails. */
+gpr_slice gpr_slice_malloc(size_t length);
+
+/* Create a slice by copying a string.
+   Does not preserve null terminators.
+   Equivalent to:
+     size_t len = strlen(source);
+     gpr_slice slice = gpr_slice_malloc(len);
+     memcpy(slice->data, source, len); */
+gpr_slice gpr_slice_from_copied_string(const char *source);
+
+/* Create a slice by copying a buffer.
+   Equivalent to:
+     gpr_slice slice = gpr_slice_malloc(len);
+     memcpy(slice->data, source, len); */
+gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
+
+/* Create a slice pointing to constant memory */
+gpr_slice gpr_slice_from_static_string(const char *source);
+
+/* Return a result slice derived from s, which shares a ref count with s, where
+   result.data==s.data+begin, and result.length==end-begin.
+   The ref count of s is increased by one.
+   Requires s initialized, begin <= end, begin <= s.length, and
+   end <= source->length. */
+gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
+
+/* The same as gpr_slice_sub, but without altering the ref count */
+gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
+
+/* Splits s into two: modifies s to be s[0:split], and returns a new slice,
+   sharing a refcount with s, that contains s[split:s.length].
+   Requires s intialized, split <= s.length */
+gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
+
+/* Splits s into two: modifies s to be s[split:s.length], and returns a new
+   slice, sharing a refcount with s, that contains s[0:split].
+   Requires s intialized, split <= s.length */
+gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
+
+gpr_slice gpr_empty_slice(void);
+
+/* Returns <0 if a < b, ==0 if a == b, >0 if a > b
+   The order is arbitrary, and is not guaranteed to be stable across different
+   versions of the API. */
+int gpr_slice_cmp(gpr_slice a, gpr_slice b);
+int gpr_slice_str_cmp(gpr_slice a, const char *b);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_SLICE_H */
diff --git a/include/grpc/impl/codegen/slice_buffer.h b/include/grpc/impl/codegen/slice_buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..ca6f91d0b804f3c2b30b153a20f0dc4052a4e2b6
--- /dev/null
+++ b/include/grpc/impl/codegen/slice_buffer.h
@@ -0,0 +1,102 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
+#define GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
+
+#include <grpc/impl/codegen/slice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
+
+/* Represents an expandable array of slices, to be interpreted as a single item
+   TODO(ctiller): inline some small number of elements into the struct, to
+                  avoid per-call allocations */
+typedef struct {
+  /* slices in the array */
+  gpr_slice *slices;
+  /* the number of slices in the array */
+  size_t count;
+  /* the number of slices allocated in the array */
+  size_t capacity;
+  /* the combined length of all slices in the array */
+  size_t length;
+  /* inlined elements to avoid allocations */
+  gpr_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
+} gpr_slice_buffer;
+
+/* initialize a slice buffer */
+void gpr_slice_buffer_init(gpr_slice_buffer *sb);
+/* destroy a slice buffer - unrefs any held elements */
+void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
+/* Add an element to a slice buffer - takes ownership of the slice.
+   This function is allowed to concatenate the passed in slice to the end of
+   some other slice if desired by the slice buffer. */
+void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
+/* add an element to a slice buffer - takes ownership of the slice and returns
+   the index of the slice.
+   Guarantees that the slice will not be concatenated at the end of another
+   slice (i.e. the data for this slice will begin at the first byte of the
+   slice at the returned index in sb->slices)
+   The implementation MAY decide to concatenate data at the end of a small
+   slice added in this fashion. */
+size_t gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb, gpr_slice slice);
+void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices, size_t n);
+/* add a very small (less than 8 bytes) amount of data to the end of a slice
+   buffer: returns a pointer into which to add the data */
+uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
+/* pop the last buffer, but don't unref it */
+void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
+/* clear a slice buffer, unref all elements */
+void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
+/* swap the contents of two slice buffers */
+void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
+/* move all of the elements of src into dst */
+void gpr_slice_buffer_move_into(gpr_slice_buffer *src, gpr_slice_buffer *dst);
+/* remove n bytes from the end of a slice buffer */
+void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
+                               gpr_slice_buffer *garbage);
+/* move the first n bytes of src into dst */
+void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
+                                 gpr_slice_buffer *dst);
+/* take the first slice in the slice buffer */
+gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_SLICE_BUFFER_H */
diff --git a/include/grpc/impl/codegen/status.h b/include/grpc/impl/codegen/status.h
new file mode 100644
index 0000000000000000000000000000000000000000..814bb4c92ccadc889f0ca7b64f245f067da12e7c
--- /dev/null
+++ b/include/grpc/impl/codegen/status.h
@@ -0,0 +1,163 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_STATUS_H
+#define GRPC_IMPL_CODEGEN_STATUS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+  /* Not an error; returned on success */
+  GRPC_STATUS_OK = 0,
+
+  /* The operation was cancelled (typically by the caller). */
+  GRPC_STATUS_CANCELLED = 1,
+
+  /* Unknown error.  An example of where this error may be returned is
+     if a Status value received from another address space belongs to
+     an error-space that is not known in this address space.  Also
+     errors raised by APIs that do not return enough error information
+     may be converted to this error. */
+  GRPC_STATUS_UNKNOWN = 2,
+
+  /* Client specified an invalid argument.  Note that this differs
+     from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
+     that are problematic regardless of the state of the system
+     (e.g., a malformed file name). */
+  GRPC_STATUS_INVALID_ARGUMENT = 3,
+
+  /* Deadline expired before operation could complete.  For operations
+     that change the state of the system, this error may be returned
+     even if the operation has completed successfully.  For example, a
+     successful response from a server could have been delayed long
+     enough for the deadline to expire. */
+  GRPC_STATUS_DEADLINE_EXCEEDED = 4,
+
+  /* Some requested entity (e.g., file or directory) was not found. */
+  GRPC_STATUS_NOT_FOUND = 5,
+
+  /* Some entity that we attempted to create (e.g., file or directory)
+     already exists. */
+  GRPC_STATUS_ALREADY_EXISTS = 6,
+
+  /* The caller does not have permission to execute the specified
+     operation.  PERMISSION_DENIED must not be used for rejections
+     caused by exhausting some resource (use RESOURCE_EXHAUSTED
+     instead for those errors).  PERMISSION_DENIED must not be
+     used if the caller can not be identified (use UNAUTHENTICATED
+     instead for those errors). */
+  GRPC_STATUS_PERMISSION_DENIED = 7,
+
+  /* The request does not have valid authentication credentials for the
+     operation. */
+  GRPC_STATUS_UNAUTHENTICATED = 16,
+
+  /* Some resource has been exhausted, perhaps a per-user quota, or
+     perhaps the entire file system is out of space. */
+  GRPC_STATUS_RESOURCE_EXHAUSTED = 8,
+
+  /* Operation was rejected because the system is not in a state
+     required for the operation's execution.  For example, directory
+     to be deleted may be non-empty, an rmdir operation is applied to
+     a non-directory, etc.
+
+     A litmus test that may help a service implementor in deciding
+     between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
+      (a) Use UNAVAILABLE if the client can retry just the failing call.
+      (b) Use ABORTED if the client should retry at a higher-level
+          (e.g., restarting a read-modify-write sequence).
+      (c) Use FAILED_PRECONDITION if the client should not retry until
+          the system state has been explicitly fixed.  E.g., if an "rmdir"
+          fails because the directory is non-empty, FAILED_PRECONDITION
+          should be returned since the client should not retry unless
+          they have first fixed up the directory by deleting files from it.
+      (d) Use FAILED_PRECONDITION if the client performs conditional
+          REST Get/Update/Delete on a resource and the resource on the
+          server does not match the condition. E.g., conflicting
+          read-modify-write on the same resource. */
+  GRPC_STATUS_FAILED_PRECONDITION = 9,
+
+  /* The operation was aborted, typically due to a concurrency issue
+     like sequencer check failures, transaction aborts, etc.
+
+     See litmus test above for deciding between FAILED_PRECONDITION,
+     ABORTED, and UNAVAILABLE. */
+  GRPC_STATUS_ABORTED = 10,
+
+  /* Operation was attempted past the valid range.  E.g., seeking or
+     reading past end of file.
+
+     Unlike INVALID_ARGUMENT, this error indicates a problem that may
+     be fixed if the system state changes. For example, a 32-bit file
+     system will generate INVALID_ARGUMENT if asked to read at an
+     offset that is not in the range [0,2^32-1], but it will generate
+     OUT_OF_RANGE if asked to read from an offset past the current
+     file size.
+
+     There is a fair bit of overlap between FAILED_PRECONDITION and
+     OUT_OF_RANGE.  We recommend using OUT_OF_RANGE (the more specific
+     error) when it applies so that callers who are iterating through
+     a space can easily look for an OUT_OF_RANGE error to detect when
+     they are done. */
+  GRPC_STATUS_OUT_OF_RANGE = 11,
+
+  /* Operation is not implemented or not supported/enabled in this service. */
+  GRPC_STATUS_UNIMPLEMENTED = 12,
+
+  /* Internal errors.  Means some invariants expected by underlying
+     system has been broken.  If you see one of these errors,
+     something is very broken. */
+  GRPC_STATUS_INTERNAL = 13,
+
+  /* The service is currently unavailable.  This is a most likely a
+     transient condition and may be corrected by retrying with
+     a backoff.
+
+     See litmus test above for deciding between FAILED_PRECONDITION,
+     ABORTED, and UNAVAILABLE. */
+  GRPC_STATUS_UNAVAILABLE = 14,
+
+  /* Unrecoverable data loss or corruption. */
+  GRPC_STATUS_DATA_LOSS = 15,
+
+  /* Force users to include a default branch: */
+  GRPC_STATUS__DO_NOT_USE = -1
+} grpc_status_code;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_STATUS_H */
diff --git a/include/grpc/impl/codegen/sync.h b/include/grpc/impl/codegen/sync.h
new file mode 100644
index 0000000000000000000000000000000000000000..052e39d8a09973cfac9ba677e9aefc4165142178
--- /dev/null
+++ b/include/grpc/impl/codegen/sync.h
@@ -0,0 +1,315 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SYNC_H
+#define GRPC_IMPL_CODEGEN_SYNC_H
+/* Synchronization primitives for GPR.
+
+   The type  gpr_mu              provides a non-reentrant mutex (lock).
+
+   The type  gpr_cv              provides a condition variable.
+
+   The type  gpr_once            provides for one-time initialization.
+
+   The type gpr_event            provides one-time-setting, reading, and
+                                 waiting of a void*, with memory barriers.
+
+   The type gpr_refcount         provides an object reference counter,
+                                 with memory barriers suitable to control
+                                 object lifetimes.
+
+   The type gpr_stats_counter    provides an atomic statistics counter. It
+                                 provides no memory barriers.
+ */
+
+/* Platform-specific type declarations of gpr_mu and gpr_cv.   */
+#include <grpc/impl/codegen/port_platform.h>
+#include <grpc/impl/codegen/sync_generic.h>
+
+#if defined(GPR_POSIX_SYNC)
+#include <grpc/impl/codegen/sync_posix.h>
+#elif defined(GPR_WIN32)
+#include <grpc/impl/codegen/sync_win32.h>
+#elif !defined(GPR_CUSTOM_SYNC)
+#error Unable to determine platform for sync
+#endif
+
+#include <grpc/impl/codegen/time.h> /* for gpr_timespec */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* --- Mutex interface ---
+
+   At most one thread may hold an exclusive lock on a mutex at any given time.
+   Actions taken by a thread that holds a mutex exclusively happen after
+   actions taken by all previous holders of the mutex.  Variables of type
+   gpr_mu are uninitialized when first declared.  */
+
+/* Initialize *mu.  Requires:  *mu uninitialized.  */
+void gpr_mu_init(gpr_mu *mu);
+
+/* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
+   *mu initialized; no other concurrent operation on *mu.  */
+void gpr_mu_destroy(gpr_mu *mu);
+
+/* Wait until no thread has a lock on *mu, cause the calling thread to own an
+   exclusive lock on *mu, then return.  May block indefinitely or crash if the
+   calling thread has a lock on *mu.  Requires:  *mu initialized.  */
+void gpr_mu_lock(gpr_mu *mu);
+
+/* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
+   initialized; the calling thread holds an exclusive lock on *mu.  */
+void gpr_mu_unlock(gpr_mu *mu);
+
+/* Without blocking, attempt to acquire an exclusive lock on *mu for the
+   calling thread, then return non-zero iff success.  Fail, if any thread holds
+   the lock; succeeds with high probability if no thread holds the lock.
+   Requires:  *mu initialized.  */
+int gpr_mu_trylock(gpr_mu *mu);
+
+/* --- Condition variable interface ---
+
+   A while-loop should be used with gpr_cv_wait() when waiting for conditions
+   to become true.  See the example below.  Variables of type gpr_cv are
+   uninitialized when first declared.  */
+
+/* Initialize *cv.  Requires:  *cv uninitialized.  */
+void gpr_cv_init(gpr_cv *cv);
+
+/* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
+   *cv initialized; no other concurrent operation on *cv.*/
+void gpr_cv_destroy(gpr_cv *cv);
+
+/* Atomically release *mu and wait on *cv.  When the calling thread is woken
+   from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
+   and return whether the deadline was exceeded.  Use
+   abs_deadline==gpr_inf_future for no deadline.  May return even when not
+   woken explicitly.  Requires:  *mu and *cv initialized; the calling thread
+   holds an exclusive lock on *mu.  */
+int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
+
+/* If any threads are waiting on *cv, wake at least one.
+   Clients may treat this as an optimization of gpr_cv_broadcast()
+   for use in the case where waking more than one waiter is not useful.
+   Requires:  *cv initialized.  */
+void gpr_cv_signal(gpr_cv *cv);
+
+/* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
+void gpr_cv_broadcast(gpr_cv *cv);
+
+/* --- One-time initialization ---
+
+   gpr_once must be declared with static storage class, and initialized with
+   GPR_ONCE_INIT.  e.g.,
+     static gpr_once once_var = GPR_ONCE_INIT;     */
+
+/* Ensure that (*init_routine)() has been called exactly once (for the
+   specified gpr_once instance) and then return.
+   If multiple threads call gpr_once() on the same gpr_once instance, one of
+   them will call (*init_routine)(), and the others will block until that call
+   finishes.*/
+void gpr_once_init(gpr_once *once, void (*init_routine)(void));
+
+/* --- One-time event notification ---
+
+  These operations act on a gpr_event, which should be initialized with
+  gpr_ev_init(), or with GPR_EVENT_INIT if static, e.g.,
+       static gpr_event event_var = GPR_EVENT_INIT;
+  It requires no destruction.  */
+
+/* Initialize *ev. */
+void gpr_event_init(gpr_event *ev);
+
+/* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
+   Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
+   gpr_event_set(ev, ...) since initialization.  */
+void gpr_event_set(gpr_event *ev, void *value);
+
+/* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
+   completed.  If the result is non-NULL, all operations that occurred prior to
+   the gpr_event_set(ev, ...) set will be visible after this call returns.
+   Requires:  *ev initialized.  This operation is faster than acquiring a mutex
+   on most platforms.  */
+void *gpr_event_get(gpr_event *ev);
+
+/* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
+   exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
+   abs_deadline==gpr_inf_future for no deadline.  When the event has been
+   signalled before the call, this operation is faster than acquiring a mutex
+   on most platforms.  */
+void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
+
+/* --- Reference counting ---
+
+   These calls act on the type gpr_refcount.  It requires no destruction.  */
+
+/* Initialize *r to value n.  */
+void gpr_ref_init(gpr_refcount *r, int n);
+
+/* Increment the reference count *r.  Requires *r initialized. */
+void gpr_ref(gpr_refcount *r);
+
+/* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
+void gpr_refn(gpr_refcount *r, int n);
+
+/* Decrement the reference count *r and return non-zero iff it has reached
+   zero. .  Requires *r initialized. */
+int gpr_unref(gpr_refcount *r);
+
+/* --- Stats counters ---
+
+   These calls act on the integral type gpr_stats_counter.  It requires no
+   destruction.  Static instances may be initialized with
+       gpr_stats_counter c = GPR_STATS_INIT;
+   Beware:  These operations do not imply memory barriers.  Do not use them to
+   synchronize other events.  */
+
+/* Initialize *c to the value n. */
+void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
+
+/* *c += inc.  Requires: *c initialized. */
+void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
+
+/* Return *c.  Requires: *c initialized. */
+intptr_t gpr_stats_read(const gpr_stats_counter *c);
+
+/* ==================Example use of interface===================
+   A producer-consumer queue of up to N integers,
+   illustrating the use of the calls in this interface. */
+#if 0
+
+#define N 4
+
+   typedef struct queue {
+     gpr_cv non_empty;  /* Signalled when length becomes non-zero. */
+     gpr_cv non_full;   /* Signalled when length becomes non-N. */
+     gpr_mu mu;         /* Protects all fields below.
+                            (That is, except during initialization or
+                            destruction, the fields below should be accessed
+                            only by a thread that holds mu.) */
+     int head;           /* Index of head of queue 0..N-1. */
+     int length;         /* Number of valid elements in queue 0..N. */
+     int elem[N];        /* elem[head .. head+length-1] are queue elements. */
+   } queue;
+
+   /* Initialize *q. */
+   void queue_init(queue *q) {
+     gpr_mu_init(&q->mu);
+     gpr_cv_init(&q->non_empty);
+     gpr_cv_init(&q->non_full);
+     q->head = 0;
+     q->length = 0;
+   }
+
+   /* Free storage associated with *q. */
+   void queue_destroy(queue *q) {
+     gpr_mu_destroy(&q->mu);
+     gpr_cv_destroy(&q->non_empty);
+     gpr_cv_destroy(&q->non_full);
+   }
+
+   /* Wait until there is room in *q, then append x to *q. */
+   void queue_append(queue *q, int x) {
+     gpr_mu_lock(&q->mu);
+     /* To wait for a predicate without a deadline, loop on the negation of the
+        predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop
+        to release the lock, wait, and reacquire on each iteration.  Code that
+        makes the condition true should use gpr_cv_broadcast() on the
+        corresponding condition variable.  The predicate must be on state
+        protected by the lock.  */
+     while (q->length == N) {
+       gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future);
+     }
+     if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
+       /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
+          holding the lock. */
+       gpr_cv_broadcast(&q->non_empty);
+     }
+     q->elem[(q->head + q->length) % N] = x;
+     q->length++;
+     gpr_mu_unlock(&q->mu);
+   }
+
+   /* If it can be done without blocking, append x to *q and return non-zero.
+      Otherwise return 0. */
+   int queue_try_append(queue *q, int x) {
+     int result = 0;
+     if (gpr_mu_trylock(&q->mu)) {
+       if (q->length != N) {
+         if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
+           gpr_cv_broadcast(&q->non_empty);
+         }
+         q->elem[(q->head + q->length) % N] = x;
+         q->length++;
+         result = 1;
+       }
+       gpr_mu_unlock(&q->mu);
+     }
+     return result;
+   }
+
+   /* Wait until the *q is non-empty or deadline abs_deadline passes.  If the
+      queue is non-empty, remove its head entry, place it in *head, and return
+      non-zero.  Otherwise return 0.  */
+   int queue_remove(queue *q, int *head, gpr_timespec abs_deadline) {
+     int result = 0;
+     gpr_mu_lock(&q->mu);
+     /* To wait for a predicate with a deadline, loop on the negation of the
+        predicate or until gpr_cv_wait() returns true.  Code that makes
+        the condition true should use gpr_cv_broadcast() on the corresponding
+        condition variable.  The predicate must be on state protected by the
+        lock. */
+     while (q->length == 0 &&
+            !gpr_cv_wait(&q->non_empty, &q->mu, abs_deadline)) {
+     }
+     if (q->length != 0) {    /* Queue is non-empty. */
+       result = 1;
+       if (q->length == N) {  /* Wake threads blocked in queue_append(). */
+         gpr_cv_broadcast(&q->non_full);
+       }
+       *head = q->elem[q->head];
+       q->head = (q->head + 1) % N;
+       q->length--;
+     } /* else deadline exceeded */
+     gpr_mu_unlock(&q->mu);
+     return result;
+   }
+#endif /* 0 */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_SYNC_H */
diff --git a/include/grpc/impl/codegen/sync_generic.h b/include/grpc/impl/codegen/sync_generic.h
new file mode 100644
index 0000000000000000000000000000000000000000..71443b5794f08eadd205ea7f9de65ededfdad559
--- /dev/null
+++ b/include/grpc/impl/codegen/sync_generic.h
@@ -0,0 +1,55 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SYNC_GENERIC_H
+#define GRPC_IMPL_CODEGEN_SYNC_GENERIC_H
+/* Generic type defintions for gpr_sync. */
+
+#include <grpc/impl/codegen/atm.h>
+
+/* gpr_event */
+typedef struct { gpr_atm state; } gpr_event;
+
+#define GPR_EVENT_INIT \
+  { 0 }
+
+/* gpr_refcount */
+typedef struct { gpr_atm count; } gpr_refcount;
+
+/* gpr_stats_counter */
+typedef struct { gpr_atm value; } gpr_stats_counter;
+
+#define GPR_STATS_INIT \
+  { 0 }
+
+#endif /* GRPC_IMPL_CODEGEN_SYNC_GENERIC_H */
diff --git a/include/grpc/impl/codegen/sync_posix.h b/include/grpc/impl/codegen/sync_posix.h
new file mode 100644
index 0000000000000000000000000000000000000000..f6e0a91816dcf7b0ebfbc38085e87bc8e07f5bdd
--- /dev/null
+++ b/include/grpc/impl/codegen/sync_posix.h
@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SYNC_POSIX_H
+#define GRPC_IMPL_CODEGEN_SYNC_POSIX_H
+
+#include <grpc/impl/codegen/sync_generic.h>
+
+#include <pthread.h>
+
+typedef pthread_mutex_t gpr_mu;
+typedef pthread_cond_t gpr_cv;
+typedef pthread_once_t gpr_once;
+
+#define GPR_ONCE_INIT PTHREAD_ONCE_INIT
+
+#endif /* GRPC_IMPL_CODEGEN_SYNC_POSIX_H */
diff --git a/include/grpc/impl/codegen/sync_win32.h b/include/grpc/impl/codegen/sync_win32.h
new file mode 100644
index 0000000000000000000000000000000000000000..1a6596c571ab47b0923fc0cd9ec5603f73a24542
--- /dev/null
+++ b/include/grpc/impl/codegen/sync_win32.h
@@ -0,0 +1,49 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SYNC_WIN32_H
+#define GRPC_IMPL_CODEGEN_SYNC_WIN32_H
+
+#include <grpc/impl/codegen/sync_generic.h>
+
+typedef struct {
+  CRITICAL_SECTION cs; /* Not an SRWLock until Vista is unsupported */
+  int locked;
+} gpr_mu;
+
+typedef CONDITION_VARIABLE gpr_cv;
+
+typedef INIT_ONCE gpr_once;
+#define GPR_ONCE_INIT INIT_ONCE_STATIC_INIT
+
+#endif /* GRPC_IMPL_CODEGEN_SYNC_WIN32_H */
diff --git a/include/grpc/impl/codegen/time.h b/include/grpc/impl/codegen/time.h
new file mode 100644
index 0000000000000000000000000000000000000000..2248391f520b267528f207fa7adaef275000b8af
--- /dev/null
+++ b/include/grpc/impl/codegen/time.h
@@ -0,0 +1,128 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_TIME_H
+#define GRPC_IMPL_CODEGEN_TIME_H
+/* Time support.
+   We use gpr_timespec, which is analogous to struct timespec.  On some
+   machines, absolute times may be in local time.  */
+
+#include <grpc/impl/codegen/port_platform.h>
+#include <stddef.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The clocks we support. */
+typedef enum {
+  /* Monotonic clock. Epoch undefined. Always moves forwards. */
+  GPR_CLOCK_MONOTONIC = 0,
+  /* Realtime clock. May jump forwards or backwards. Settable by
+     the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */
+  GPR_CLOCK_REALTIME,
+  /* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
+     undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */
+  GPR_CLOCK_PRECISE,
+  /* Unmeasurable clock type: no base, created by taking the difference
+     between two times */
+  GPR_TIMESPAN
+} gpr_clock_type;
+
+typedef struct gpr_timespec {
+  int64_t tv_sec;
+  int32_t tv_nsec;
+  /** Against which clock was this time measured? (or GPR_TIMESPAN if
+      this is a relative time meaure) */
+  gpr_clock_type clock_type;
+} gpr_timespec;
+
+/* Time constants. */
+gpr_timespec gpr_time_0(gpr_clock_type type);     /* The zero time interval. */
+gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
+gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
+
+#define GPR_MS_PER_SEC 1000
+#define GPR_US_PER_SEC 1000000
+#define GPR_NS_PER_SEC 1000000000
+#define GPR_NS_PER_MS 1000000
+#define GPR_NS_PER_US 1000
+#define GPR_US_PER_MS 1000
+
+/* initialize time subsystem */
+void gpr_time_init(void);
+
+/* Return the current time measured from the given clocks epoch. */
+gpr_timespec gpr_now(gpr_clock_type clock);
+
+/* Convert a timespec from one clock to another */
+gpr_timespec gpr_convert_clock_type(gpr_timespec t,
+                                    gpr_clock_type target_clock);
+
+/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
+   respectively.  */
+int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
+
+gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
+gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
+
+/* Add and subtract times.  Calculations saturate at infinities. */
+gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
+gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
+
+/* Return a timespec representing a given number of time units. LONG_MIN is
+   interpreted as gpr_inf_past, and LONG_MAX as gpr_inf_future.  */
+gpr_timespec gpr_time_from_micros(long x, gpr_clock_type clock_type);
+gpr_timespec gpr_time_from_nanos(long x, gpr_clock_type clock_type);
+gpr_timespec gpr_time_from_millis(long x, gpr_clock_type clock_type);
+gpr_timespec gpr_time_from_seconds(long x, gpr_clock_type clock_type);
+gpr_timespec gpr_time_from_minutes(long x, gpr_clock_type clock_type);
+gpr_timespec gpr_time_from_hours(long x, gpr_clock_type clock_type);
+
+int32_t gpr_time_to_millis(gpr_timespec timespec);
+
+/* Return 1 if two times are equal or within threshold of each other,
+   0 otherwise */
+int gpr_time_similar(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
+
+/* Sleep until at least 'until' - an absolute timeout */
+void gpr_sleep_until(gpr_timespec until);
+
+double gpr_timespec_to_micros(gpr_timespec t);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_TIME_H */
diff --git a/include/grpc/status.h b/include/grpc/status.h
index 65ce4102275aa2b4afb0c058b4e0185275e95407..3889a1648609bec8aef52404ba04166a0fbeaaa9 100644
--- a/include/grpc/status.h
+++ b/include/grpc/status.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,130 +34,6 @@
 #ifndef GRPC_STATUS_H
 #define GRPC_STATUS_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
-  /* Not an error; returned on success */
-  GRPC_STATUS_OK = 0,
-
-  /* The operation was cancelled (typically by the caller). */
-  GRPC_STATUS_CANCELLED = 1,
-
-  /* Unknown error.  An example of where this error may be returned is
-     if a Status value received from another address space belongs to
-     an error-space that is not known in this address space.  Also
-     errors raised by APIs that do not return enough error information
-     may be converted to this error. */
-  GRPC_STATUS_UNKNOWN = 2,
-
-  /* Client specified an invalid argument.  Note that this differs
-     from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
-     that are problematic regardless of the state of the system
-     (e.g., a malformed file name). */
-  GRPC_STATUS_INVALID_ARGUMENT = 3,
-
-  /* Deadline expired before operation could complete.  For operations
-     that change the state of the system, this error may be returned
-     even if the operation has completed successfully.  For example, a
-     successful response from a server could have been delayed long
-     enough for the deadline to expire. */
-  GRPC_STATUS_DEADLINE_EXCEEDED = 4,
-
-  /* Some requested entity (e.g., file or directory) was not found. */
-  GRPC_STATUS_NOT_FOUND = 5,
-
-  /* Some entity that we attempted to create (e.g., file or directory)
-     already exists. */
-  GRPC_STATUS_ALREADY_EXISTS = 6,
-
-  /* The caller does not have permission to execute the specified
-     operation.  PERMISSION_DENIED must not be used for rejections
-     caused by exhausting some resource (use RESOURCE_EXHAUSTED
-     instead for those errors).  PERMISSION_DENIED must not be
-     used if the caller can not be identified (use UNAUTHENTICATED
-     instead for those errors). */
-  GRPC_STATUS_PERMISSION_DENIED = 7,
-
-  /* The request does not have valid authentication credentials for the
-     operation. */
-  GRPC_STATUS_UNAUTHENTICATED = 16,
-
-  /* Some resource has been exhausted, perhaps a per-user quota, or
-     perhaps the entire file system is out of space. */
-  GRPC_STATUS_RESOURCE_EXHAUSTED = 8,
-
-  /* Operation was rejected because the system is not in a state
-     required for the operation's execution.  For example, directory
-     to be deleted may be non-empty, an rmdir operation is applied to
-     a non-directory, etc.
-
-     A litmus test that may help a service implementor in deciding
-     between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
-      (a) Use UNAVAILABLE if the client can retry just the failing call.
-      (b) Use ABORTED if the client should retry at a higher-level
-          (e.g., restarting a read-modify-write sequence).
-      (c) Use FAILED_PRECONDITION if the client should not retry until
-          the system state has been explicitly fixed.  E.g., if an "rmdir"
-          fails because the directory is non-empty, FAILED_PRECONDITION
-          should be returned since the client should not retry unless
-          they have first fixed up the directory by deleting files from it.
-      (d) Use FAILED_PRECONDITION if the client performs conditional
-          REST Get/Update/Delete on a resource and the resource on the
-          server does not match the condition. E.g., conflicting
-          read-modify-write on the same resource. */
-  GRPC_STATUS_FAILED_PRECONDITION = 9,
-
-  /* The operation was aborted, typically due to a concurrency issue
-     like sequencer check failures, transaction aborts, etc.
-
-     See litmus test above for deciding between FAILED_PRECONDITION,
-     ABORTED, and UNAVAILABLE. */
-  GRPC_STATUS_ABORTED = 10,
-
-  /* Operation was attempted past the valid range.  E.g., seeking or
-     reading past end of file.
-
-     Unlike INVALID_ARGUMENT, this error indicates a problem that may
-     be fixed if the system state changes. For example, a 32-bit file
-     system will generate INVALID_ARGUMENT if asked to read at an
-     offset that is not in the range [0,2^32-1], but it will generate
-     OUT_OF_RANGE if asked to read from an offset past the current
-     file size.
-
-     There is a fair bit of overlap between FAILED_PRECONDITION and
-     OUT_OF_RANGE.  We recommend using OUT_OF_RANGE (the more specific
-     error) when it applies so that callers who are iterating through
-     a space can easily look for an OUT_OF_RANGE error to detect when
-     they are done. */
-  GRPC_STATUS_OUT_OF_RANGE = 11,
-
-  /* Operation is not implemented or not supported/enabled in this service. */
-  GRPC_STATUS_UNIMPLEMENTED = 12,
-
-  /* Internal errors.  Means some invariants expected by underlying
-     system has been broken.  If you see one of these errors,
-     something is very broken. */
-  GRPC_STATUS_INTERNAL = 13,
-
-  /* The service is currently unavailable.  This is a most likely a
-     transient condition and may be corrected by retrying with
-     a backoff.
-
-     See litmus test above for deciding between FAILED_PRECONDITION,
-     ABORTED, and UNAVAILABLE. */
-  GRPC_STATUS_UNAVAILABLE = 14,
-
-  /* Unrecoverable data loss or corruption. */
-  GRPC_STATUS_DATA_LOSS = 15,
-
-  /* Force users to include a default branch: */
-  GRPC_STATUS__DO_NOT_USE = -1
-} grpc_status_code;
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/status.h>
 
 #endif /* GRPC_STATUS_H */
diff --git a/include/grpc/support/alloc.h b/include/grpc/support/alloc.h
index f5cdadea4ba19fb70a07bfb0acbb36933c2e031f..649cb2ba7a04d78fa7121b2e2ef2365c00fc9496 100644
--- a/include/grpc/support/alloc.h
+++ b/include/grpc/support/alloc.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,39 +34,6 @@
 #ifndef GRPC_SUPPORT_ALLOC_H
 #define GRPC_SUPPORT_ALLOC_H
 
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct gpr_allocation_functions {
-  void *(*malloc_fn)(size_t size);
-  void *(*realloc_fn)(void *ptr, size_t size);
-  void (*free_fn)(void *ptr);
-} gpr_allocation_functions;
-
-/* malloc, never returns NULL */
-void *gpr_malloc(size_t size);
-/* free */
-void gpr_free(void *ptr);
-/* realloc, never returns NULL */
-void *gpr_realloc(void *p, size_t size);
-/* aligned malloc, never returns NULL, will align to 1 << alignment_log */
-void *gpr_malloc_aligned(size_t size, size_t alignment_log);
-/* free memory allocated by gpr_malloc_aligned */
-void gpr_free_aligned(void *ptr);
-
-/** Request the family of allocation functions in \a functions be used. NOTE
- * that this request will be honored in a *best effort* basis and that no
- * guarantees are made about the default functions (eg, malloc) being called. */
-void gpr_set_allocation_functions(gpr_allocation_functions functions);
-
-/** Return the family of allocation functions currently in effect. */
-gpr_allocation_functions gpr_get_allocation_functions();
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/alloc.h>
 
 #endif /* GRPC_SUPPORT_ALLOC_H */
diff --git a/include/grpc/support/atm.h b/include/grpc/support/atm.h
index cbb381304ea8109ae75e276cb6f57fdbfffefb21..37975db8f4e766416dcc433869a7fec6c08990c9 100644
--- a/include/grpc/support/atm.h
+++ b/include/grpc/support/atm.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,59 +34,6 @@
 #ifndef GRPC_SUPPORT_ATM_H
 #define GRPC_SUPPORT_ATM_H
 
-/* This interface provides atomic operations and barriers.
-   It is internal to gpr support code and should not be used outside it.
-
-   If an operation with acquire semantics precedes another memory access by the
-   same thread, the operation will precede that other access as seen by other
-   threads.
-
-   If an operation with release semantics follows another memory access by the
-   same thread, the operation will follow that other access as seen by other
-   threads.
-
-   Routines with "acq" or "full" in the name have acquire semantics.  Routines
-   with "rel" or "full" in the name have release semantics.  Routines with
-   "no_barrier" in the name have neither acquire not release semantics.
-
-   The routines may be implemented as macros.
-
-   // Atomic operations act on an intergral_type gpr_atm that is guaranteed to
-   // be the same size as a pointer.
-   typedef intptr_t gpr_atm;
-
-   // A memory barrier, providing both acquire and release semantics, but not
-   // otherwise acting on memory.
-   void gpr_atm_full_barrier(void);
-
-   // Atomically return *p, with acquire semantics.
-   gpr_atm gpr_atm_acq_load(gpr_atm *p);
-
-   // Atomically set *p = value, with release semantics.
-   void gpr_atm_rel_store(gpr_atm *p, gpr_atm value);
-
-   // Atomically add delta to *p, and return the old value of *p, with
-   // the barriers specified.
-   gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p, gpr_atm delta);
-   gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta);
-
-   // Atomically, if *p==o, set *p=n and return non-zero otherwise return 0,
-   // with the barriers specified if the operation succeeds.
-   int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
-   int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
-   int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n);
-*/
-
-#include <grpc/support/port_platform.h>
-
-#if defined(GPR_GCC_ATOMIC)
-#include <grpc/support/atm_gcc_atomic.h>
-#elif defined(GPR_GCC_SYNC)
-#include <grpc/support/atm_gcc_sync.h>
-#elif defined(GPR_WIN32_ATOMIC)
-#include <grpc/support/atm_win32.h>
-#else
-#error could not determine platform for atm
-#endif
+#include <grpc/impl/codegen/atm.h>
 
 #endif /* GRPC_SUPPORT_ATM_H */
diff --git a/include/grpc/support/atm_gcc_atomic.h b/include/grpc/support/atm_gcc_atomic.h
index 90d91dded2267733ef64c177aa0a26ffb0696dac..7e1f7fd55a575b991d7945aeb532acdc23a6f43c 100644
--- a/include/grpc/support/atm_gcc_atomic.h
+++ b/include/grpc/support/atm_gcc_atomic.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,42 +31,9 @@
  *
  */
 
-#ifndef GRPC_SUPPORT_ATM_GCC_ATOMIC_H
-#define GRPC_SUPPORT_ATM_GCC_ATOMIC_H
+#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
+#define GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
 
-/* atm_platform.h for gcc and gcc-like compilers with the
-   __atomic_* interface.  */
-#include <grpc/support/port_platform.h>
+#include <grpc/impl/codegen/atm_gcc_atomic.h>
 
-typedef intptr_t gpr_atm;
-
-#define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
-
-#define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
-#define gpr_atm_no_barrier_load(p) (__atomic_load_n((p), __ATOMIC_RELAXED))
-#define gpr_atm_rel_store(p, value) \
-  (__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELEASE))
-#define gpr_atm_no_barrier_store(p, value) \
-  (__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELAXED))
-
-#define gpr_atm_no_barrier_fetch_add(p, delta) \
-  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_RELAXED))
-#define gpr_atm_full_fetch_add(p, delta) \
-  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_ACQ_REL))
-
-static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
-                                     __ATOMIC_RELAXED);
-}
-
-static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
-                                     __ATOMIC_RELAXED);
-}
-
-static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
-                                     __ATOMIC_RELAXED);
-}
-
-#endif /* GRPC_SUPPORT_ATM_GCC_ATOMIC_H */
+#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H */
diff --git a/include/grpc/support/atm_gcc_sync.h b/include/grpc/support/atm_gcc_sync.h
index 9d72cd414b4348a9446310bdf546db19e4718520..4a61dbd4a5edf79ea6b1f4419f3496b9fc0c8c7e 100644
--- a/include/grpc/support/atm_gcc_sync.h
+++ b/include/grpc/support/atm_gcc_sync.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,54 +34,6 @@
 #ifndef GRPC_SUPPORT_ATM_GCC_SYNC_H
 #define GRPC_SUPPORT_ATM_GCC_SYNC_H
 
-/* variant of atm_platform.h for gcc and gcc-like compiers with __sync_*
-   interface */
-#include <grpc/support/port_platform.h>
-
-typedef intptr_t gpr_atm;
-
-#define GPR_ATM_COMPILE_BARRIER_() __asm__ __volatile__("" : : : "memory")
-
-#if defined(__i386) || defined(__x86_64__)
-/* All loads are acquire loads and all stores are release stores.  */
-#define GPR_ATM_LS_BARRIER_() GPR_ATM_COMPILE_BARRIER_()
-#else
-#define GPR_ATM_LS_BARRIER_() gpr_atm_full_barrier()
-#endif
-
-#define gpr_atm_full_barrier() (__sync_synchronize())
-
-static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
-  gpr_atm value = *p;
-  GPR_ATM_LS_BARRIER_();
-  return value;
-}
-
-static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
-  gpr_atm value = *p;
-  GPR_ATM_COMPILE_BARRIER_();
-  return value;
-}
-
-static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
-  GPR_ATM_LS_BARRIER_();
-  *p = value;
-}
-
-static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
-  GPR_ATM_COMPILE_BARRIER_();
-  *p = value;
-}
-
-#undef GPR_ATM_LS_BARRIER_
-#undef GPR_ATM_COMPILE_BARRIER_
-
-#define gpr_atm_no_barrier_fetch_add(p, delta) \
-  gpr_atm_full_fetch_add((p), (delta))
-#define gpr_atm_full_fetch_add(p, delta) (__sync_fetch_and_add((p), (delta)))
-
-#define gpr_atm_no_barrier_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
-#define gpr_atm_acq_cas(p, o, n) (__sync_bool_compare_and_swap((p), (o), (n)))
-#define gpr_atm_rel_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+#include <grpc/impl/codegen/atm_gcc_sync.h>
 
 #endif /* GRPC_SUPPORT_ATM_GCC_SYNC_H */
diff --git a/include/grpc/support/atm_win32.h b/include/grpc/support/atm_win32.h
index 8b1de7652dc34ea544a5fc5ead14625574436228..ebb6a674a2e706d450596c195e1d0bcaf68c6275 100644
--- a/include/grpc/support/atm_win32.h
+++ b/include/grpc/support/atm_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,92 +34,6 @@
 #ifndef GRPC_SUPPORT_ATM_WIN32_H
 #define GRPC_SUPPORT_ATM_WIN32_H
 
-/* Win32 variant of atm_platform.h */
-#include <grpc/support/port_platform.h>
-
-typedef intptr_t gpr_atm;
-
-#define gpr_atm_full_barrier MemoryBarrier
-
-static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
-  gpr_atm result = *p;
-  gpr_atm_full_barrier();
-  return result;
-}
-
-static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
-  /* TODO(dklempner): Can we implement something better here? */
-  return gpr_atm_acq_load(p);
-}
-
-static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
-  gpr_atm_full_barrier();
-  *p = value;
-}
-
-static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
-  /* TODO(ctiller): Can we implement something better here? */
-  gpr_atm_rel_store(p, value);
-}
-
-static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-/* InterlockedCompareExchangePointerNoFence() not available on vista or
-   windows7 */
-#ifdef GPR_ARCH_64
-  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
-                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
-#else
-  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
-                                                         (LONG)n, (LONG)o);
-#endif
-}
-
-static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-#ifdef GPR_ARCH_64
-  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
-                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
-#else
-  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
-                                                         (LONG)n, (LONG)o);
-#endif
-}
-
-static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-#ifdef GPR_ARCH_64
-  return o == (gpr_atm)InterlockedCompareExchangeRelease64(
-                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
-#else
-  return o == (gpr_atm)InterlockedCompareExchangeRelease((volatile LONG *)p,
-                                                         (LONG)n, (LONG)o);
-#endif
-}
-
-static __inline gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p,
-                                                     gpr_atm delta) {
-  /* Use the CAS operation to get pointer-sized fetch and add */
-  gpr_atm old;
-  do {
-    old = *p;
-  } while (!gpr_atm_no_barrier_cas(p, old, old + delta));
-  return old;
-}
-
-static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta) {
-  /* Use a CAS operation to get pointer-sized fetch and add */
-  gpr_atm old;
-#ifdef GPR_ARCH_64
-  do {
-    old = *p;
-  } while (old != (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG *)p,
-                                                        (LONGLONG)old + delta,
-                                                        (LONGLONG)old));
-#else
-  do {
-    old = *p;
-  } while (old != (gpr_atm)InterlockedCompareExchange(
-                      (volatile LONG *)p, (LONG)old + delta, (LONG)old));
-#endif
-  return old;
-}
+#include <grpc/impl/codegen/atm_win32.h>
 
 #endif /* GRPC_SUPPORT_ATM_WIN32_H */
diff --git a/include/grpc/support/log.h b/include/grpc/support/log.h
index 59db4ba1dd90445c76f11330de741808b5ba285c..e6f6dd931cd992b885f6d50e99cf555548164fa9 100644
--- a/include/grpc/support/log.h
+++ b/include/grpc/support/log.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,75 +34,6 @@
 #ifndef GRPC_SUPPORT_LOG_H
 #define GRPC_SUPPORT_LOG_H
 
-#include <stdlib.h> /* for abort() */
-#include <stdarg.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* GPR log API.
-
-   Usage (within grpc):
-
-   int argument1 = 3;
-   char* argument2 = "hello";
-   gpr_log(GPR_DEBUG, "format string %d", argument1);
-   gpr_log(GPR_INFO, "hello world");
-   gpr_log(GPR_ERROR, "%d %s!!", argument1, argument2); */
-
-/* The severity of a log message - use the #defines below when calling into
-   gpr_log to additionally supply file and line data */
-typedef enum gpr_log_severity {
-  GPR_LOG_SEVERITY_DEBUG,
-  GPR_LOG_SEVERITY_INFO,
-  GPR_LOG_SEVERITY_ERROR
-} gpr_log_severity;
-
-/* Returns a string representation of the log severity */
-const char *gpr_log_severity_string(gpr_log_severity severity);
-
-/* Macros to build log contexts at various severity levels */
-#define GPR_DEBUG __FILE__, __LINE__, GPR_LOG_SEVERITY_DEBUG
-#define GPR_INFO __FILE__, __LINE__, GPR_LOG_SEVERITY_INFO
-#define GPR_ERROR __FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR
-
-/* Log a message. It's advised to use GPR_xxx above to generate the context
- * for each message */
-void gpr_log(const char *file, int line, gpr_log_severity severity,
-             const char *format, ...);
-
-void gpr_log_message(const char *file, int line, gpr_log_severity severity,
-                     const char *message);
-
-/* Log overrides: applications can use this API to intercept logging calls
-   and use their own implementations */
-
-typedef struct {
-  const char *file;
-  int line;
-  gpr_log_severity severity;
-  const char *message;
-} gpr_log_func_args;
-
-typedef void (*gpr_log_func)(gpr_log_func_args *args);
-void gpr_set_log_function(gpr_log_func func);
-
-/* abort() the process if x is zero, having written a line to the log.
-
-   Intended for internal invariants.  If the error can be recovered from,
-   without the possibility of corruption, or might best be reflected via
-   an exception in a higher-level language, consider returning error code.  */
-#define GPR_ASSERT(x)                                 \
-  do {                                                \
-    if (!(x)) {                                       \
-      gpr_log(GPR_ERROR, "assertion failed: %s", #x); \
-      abort();                                        \
-    }                                                 \
-  } while (0)
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/log.h>
 
 #endif /* GRPC_SUPPORT_LOG_H */
diff --git a/include/grpc/support/log_win32.h b/include/grpc/support/log_win32.h
index ea6b16dd77fa5e9f19bd398a6d9af98da4ab9711..35462669761912609df342dd0d7dd42fae20a436 100644
--- a/include/grpc/support/log_win32.h
+++ b/include/grpc/support/log_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,7 +42,7 @@ extern "C" {
  * formatted error message, corresponding to the error messageid.
  * Use in conjunction with GetLastError() et al.
  */
-char *gpr_format_message(DWORD messageid);
+char *gpr_format_message(int messageid);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/port_platform.h b/include/grpc/support/port_platform.h
index 8a30f1da41d5dbf91a73d97a21d8360aae1630f4..6b14f8b0b0eaed7b74f3b3182864853f665f47f7 100644
--- a/include/grpc/support/port_platform.h
+++ b/include/grpc/support/port_platform.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,307 +34,6 @@
 #ifndef GRPC_SUPPORT_PORT_PLATFORM_H
 #define GRPC_SUPPORT_PORT_PLATFORM_H
 
-/* Get windows.h included everywhere (we need it) */
-#if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
-#ifndef WIN32_LEAN_AND_MEAN
-#define GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
-#define WIN32_LEAN_AND_MEAN
-#endif /* WIN32_LEAN_AND_MEAN */
-
-#ifndef NOMINMAX
-#define GRPC_NOMINMX_WAS_NOT_DEFINED
-#define NOMINMAX
-#endif /* NOMINMAX */
-
-#ifndef _WIN32_WINNT
-#error \
-    "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
-#else /* !defined(_WIN32_WINNT) */
-#if (_WIN32_WINNT < 0x0600)
-#error \
-    "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
-#endif /* _WIN32_WINNT < 0x0600 */
-#endif /* defined(_WIN32_WINNT) */
-
-#include <windows.h>
-
-#ifdef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
-#undef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
-#undef WIN32_LEAN_AND_MEAN
-#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
-
-#ifdef GRPC_NOMINMAX_WAS_NOT_DEFINED
-#undef GRPC_NOMINMAX_WAS_NOT_DEFINED
-#undef NOMINMAX
-#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
-#endif /* defined(_WIN64) || defined(WIN64) || defined(_WIN32) || \
-          defined(WIN32) */
-
-/* Override this file with one for your platform if you need to redefine
-   things.  */
-
-#if !defined(GPR_NO_AUTODETECT_PLATFORM)
-#if defined(_WIN64) || defined(WIN64)
-#define GPR_PLATFORM_STRING "windows"
-#define GPR_WIN32 1
-#define GPR_ARCH_64 1
-#define GPR_GETPID_IN_PROCESS_H 1
-#define GPR_WINSOCK_SOCKET 1
-#ifdef __GNUC__
-#define GPR_GCC_ATOMIC 1
-#define GPR_GCC_TLS 1
-#else
-#define GPR_WIN32_ATOMIC 1
-#define GPR_MSVC_TLS 1
-#endif
-#define GPR_WINDOWS_CRASH_HANDLER 1
-#elif defined(_WIN32) || defined(WIN32)
-#define GPR_PLATFORM_STRING "windows"
-#define GPR_ARCH_32 1
-#define GPR_WIN32 1
-#define GPR_GETPID_IN_PROCESS_H 1
-#define GPR_WINSOCK_SOCKET 1
-#ifdef __GNUC__
-#define GPR_GCC_ATOMIC 1
-#define GPR_GCC_TLS 1
-#else
-#define GPR_WIN32_ATOMIC 1
-#define GPR_MSVC_TLS 1
-#endif
-#define GPR_WINDOWS_CRASH_HANDLER 1
-#elif defined(ANDROID) || defined(__ANDROID__)
-#define GPR_PLATFORM_STRING "android"
-#define GPR_ANDROID 1
-#define GPR_ARCH_32 1
-#define GPR_CPU_LINUX 1
-#define GPR_GCC_SYNC 1
-#define GPR_GCC_TLS 1
-#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
-#define GPR_POSIX_WAKEUP_FD 1
-#define GPR_LINUX_EVENTFD 1
-#define GPR_POSIX_SOCKET 1
-#define GPR_POSIX_SOCKETADDR 1
-#define GPR_POSIX_SOCKETUTILS 1
-#define GPR_POSIX_ENV 1
-#define GPR_POSIX_FILE 1
-#define GPR_POSIX_STRING 1
-#define GPR_POSIX_SUBPROCESS 1
-#define GPR_POSIX_SYNC 1
-#define GPR_POSIX_TIME 1
-#define GPR_GETPID_IN_UNISTD_H 1
-#define GPR_HAVE_MSG_NOSIGNAL 1
-#elif defined(__linux__)
-#define GPR_POSIX_CRASH_HANDLER 1
-#define GPR_PLATFORM_STRING "linux"
-#ifndef _BSD_SOURCE
-#define _BSD_SOURCE
-#endif
-#ifndef _DEFAULT_SOURCE
-#define _DEFAULT_SOURCE
-#endif
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-#include <features.h>
-#define GPR_CPU_LINUX 1
-#define GPR_GCC_ATOMIC 1
-#define GPR_GCC_TLS 1
-#define GPR_LINUX 1
-#define GPR_LINUX_MULTIPOLL_WITH_EPOLL 1
-#define GPR_POSIX_WAKEUP_FD 1
-#define GPR_POSIX_SOCKET 1
-#define GPR_POSIX_SOCKETADDR 1
-#ifdef __GLIBC_PREREQ
-#if __GLIBC_PREREQ(2, 9)
-#define GPR_LINUX_EVENTFD 1
-#endif
-#if __GLIBC_PREREQ(2, 10)
-#define GPR_LINUX_SOCKETUTILS 1
-#endif
-#if __GLIBC_PREREQ(2, 17)
-#define GPR_LINUX_ENV 1
-#endif
-#endif
-#ifndef GPR_LINUX_EVENTFD
-#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
-#endif
-#ifndef GPR_LINUX_SOCKETUTILS
-#define GPR_POSIX_SOCKETUTILS
-#endif
-#ifndef GPR_LINUX_ENV
-#define GPR_POSIX_ENV 1
-#endif
-#define GPR_POSIX_FILE 1
-#define GPR_POSIX_STRING 1
-#define GPR_POSIX_SUBPROCESS 1
-#define GPR_POSIX_SYNC 1
-#define GPR_POSIX_TIME 1
-#define GPR_GETPID_IN_UNISTD_H 1
-#define GPR_HAVE_MSG_NOSIGNAL 1
-#ifdef _LP64
-#define GPR_ARCH_64 1
-#else /* _LP64 */
-#define GPR_ARCH_32 1
-#endif /* _LP64 */
-#elif defined(__APPLE__)
-#include <TargetConditionals.h>
-#ifndef _BSD_SOURCE
-#define _BSD_SOURCE
-#endif
-#define GPR_MSG_IOVLEN_TYPE int
-#if TARGET_OS_IPHONE
-#define GPR_FORBID_UNREACHABLE_CODE 1
-#define GPR_PLATFORM_STRING "ios"
-#define GPR_CPU_IPHONE 1
-#define GPR_PTHREAD_TLS 1
-#else /* TARGET_OS_IPHONE */
-#define GPR_PLATFORM_STRING "osx"
-#define GPR_CPU_POSIX 1
-#define GPR_GCC_TLS 1
-#define GPR_POSIX_CRASH_HANDLER 1
-#endif
-#define GPR_GCC_ATOMIC 1
-#define GPR_POSIX_LOG 1
-#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
-#define GPR_POSIX_WAKEUP_FD 1
-#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
-#define GPR_POSIX_SOCKET 1
-#define GPR_POSIX_SOCKETADDR 1
-#define GPR_POSIX_SOCKETUTILS 1
-#define GPR_POSIX_ENV 1
-#define GPR_POSIX_FILE 1
-#define GPR_POSIX_STRING 1
-#define GPR_POSIX_SUBPROCESS 1
-#define GPR_POSIX_SYNC 1
-#define GPR_POSIX_TIME 1
-#define GPR_GETPID_IN_UNISTD_H 1
-#define GPR_HAVE_SO_NOSIGPIPE 1
-#ifdef _LP64
-#define GPR_ARCH_64 1
-#else /* _LP64 */
-#define GPR_ARCH_32 1
-#endif /* _LP64 */
-#elif defined(__FreeBSD__)
-#define GPR_PLATFORM_STRING "freebsd"
-#ifndef _BSD_SOURCE
-#define _BSD_SOURCE
-#endif
-#define GPR_CPU_POSIX 1
-#define GPR_GCC_ATOMIC 1
-#define GPR_GCC_TLS 1
-#define GPR_POSIX_LOG 1
-#define GPR_POSIX_MULTIPOLL_WITH_POLL 1
-#define GPR_POSIX_WAKEUP_FD 1
-#define GPR_POSIX_NO_SPECIAL_WAKEUP_FD 1
-#define GPR_POSIX_SOCKET 1
-#define GPR_POSIX_SOCKETADDR 1
-#define GPR_POSIX_SOCKETUTILS 1
-#define GPR_POSIX_ENV 1
-#define GPR_POSIX_FILE 1
-#define GPR_POSIX_STRING 1
-#define GPR_POSIX_SUBPROCESS 1
-#define GPR_POSIX_SYNC 1
-#define GPR_POSIX_TIME 1
-#define GPR_GETPID_IN_UNISTD_H 1
-#define GPR_HAVE_SO_NOSIGPIPE 1
-#ifdef _LP64
-#define GPR_ARCH_64 1
-#else /* _LP64 */
-#define GPR_ARCH_32 1
-#endif /* _LP64 */
-#else
-#error Could not auto-detect platform
-#endif
-#endif /* GPR_NO_AUTODETECT_PLATFORM */
-
-#ifndef GPR_PLATFORM_STRING
-#warning "GPR_PLATFORM_STRING not auto-detected"
-#define GPR_PLATFORM_STRING "unknown"
-#endif
-
-#ifdef GPR_GCOV
-#undef GPR_FORBID_UNREACHABLE_CODE
-#define GPR_FORBID_UNREACHABLE_CODE 1
-#endif
-
-/* For a common case, assume that the platform has a C99-like stdint.h */
-
-#include <stdint.h>
-
-/* Cache line alignment */
-#ifndef GPR_CACHELINE_SIZE_LOG
-#if defined(__i386__) || defined(__x86_64__)
-#define GPR_CACHELINE_SIZE_LOG 6
-#endif
-#ifndef GPR_CACHELINE_SIZE_LOG
-/* A reasonable default guess. Note that overestimates tend to waste more
-   space, while underestimates tend to waste more time. */
-#define GPR_CACHELINE_SIZE_LOG 6
-#endif /* GPR_CACHELINE_SIZE_LOG */
-#endif /* GPR_CACHELINE_SIZE_LOG */
-
-#define GPR_CACHELINE_SIZE (1 << GPR_CACHELINE_SIZE_LOG)
-
-/* scrub GCC_ATOMIC if it's not available on this compiler */
-#if defined(GPR_GCC_ATOMIC) && !defined(__ATOMIC_RELAXED)
-#undef GPR_GCC_ATOMIC
-#define GPR_GCC_SYNC 1
-#endif
-
-/* Validate platform combinations */
-#if defined(GPR_GCC_ATOMIC) + defined(GPR_GCC_SYNC) + \
-        defined(GPR_WIN32_ATOMIC) !=                  \
-    1
-#error Must define exactly one of GPR_GCC_ATOMIC, GPR_GCC_SYNC, GPR_WIN32_ATOMIC
-#endif
-
-#if defined(GPR_ARCH_32) + defined(GPR_ARCH_64) != 1
-#error Must define exactly one of GPR_ARCH_32, GPR_ARCH_64
-#endif
-
-#if defined(GPR_CPU_LINUX) + defined(GPR_CPU_POSIX) + defined(GPR_WIN32) + \
-        defined(GPR_CPU_IPHONE) + defined(GPR_CPU_CUSTOM) !=               \
-    1
-#error Must define exactly one of GPR_CPU_LINUX, GPR_CPU_POSIX, GPR_WIN32, GPR_CPU_IPHONE, GPR_CPU_CUSTOM
-#endif
-
-#if defined(GPR_POSIX_MULTIPOLL_WITH_POLL) && !defined(GPR_POSIX_SOCKET)
-#error Must define GPR_POSIX_SOCKET to use GPR_POSIX_MULTIPOLL_WITH_POLL
-#endif
-
-#if defined(GPR_POSIX_SOCKET) + defined(GPR_WINSOCK_SOCKET) + \
-        defined(GPR_CUSTOM_SOCKET) !=                         \
-    1
-#error Must define exactly one of GPR_POSIX_SOCKET, GPR_WINSOCK_SOCKET, GPR_CUSTOM_SOCKET
-#endif
-
-#if defined(GPR_MSVC_TLS) + defined(GPR_GCC_TLS) + defined(GPR_PTHREAD_TLS) + \
-        defined(GPR_CUSTOM_TLS) !=                                            \
-    1
-#error Must define exactly one of GPR_MSVC_TLS, GPR_GCC_TLS, GPR_PTHREAD_TLS, GPR_CUSTOM_TLS
-#endif
-
-/* maximum alignment needed for any type on this platform, rounded up to a
-   power of two */
-#define GPR_MAX_ALIGNMENT 16
-
-#ifndef GRPC_MUST_USE_RESULT
-#ifdef __GNUC__
-#define GRPC_MUST_USE_RESULT __attribute__((warn_unused_result))
-#else
-#define GRPC_MUST_USE_RESULT
-#endif
-#endif
-
-#if GPR_FORBID_UNREACHABLE_CODE
-#define GPR_UNREACHABLE_CODE(STATEMENT)
-#else
-#define GPR_UNREACHABLE_CODE(STATEMENT)             \
-  do {                                              \
-    gpr_log(GPR_ERROR, "Should never reach here."); \
-    abort();                                        \
-    STATEMENT;                                      \
-  } while (0)
-#endif /* GPR_FORBID_UNREACHABLE_CODE */
+#include <grpc/impl/codegen/port_platform.h>
 
 #endif /* GRPC_SUPPORT_PORT_PLATFORM_H */
diff --git a/include/grpc/support/slice.h b/include/grpc/support/slice.h
index 26ca9a847d671c389ed2242fc9345efb47af741b..b3a73b2c99ffcb1d51ea59083688dcbf0c1414ee 100644
--- a/include/grpc/support/slice.h
+++ b/include/grpc/support/slice.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,149 +34,6 @@
 #ifndef GRPC_SUPPORT_SLICE_H
 #define GRPC_SUPPORT_SLICE_H
 
-#include <grpc/support/sync.h>
-
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Slice API
-
-   A slice represents a contiguous reference counted array of bytes.
-   It is cheap to take references to a slice, and it is cheap to create a
-   slice pointing to a subset of another slice.
-
-   The data-structure for slices is exposed here to allow non-gpr code to
-   build slices from whatever data they have available.
-
-   When defining interfaces that handle slices, care should be taken to define
-   reference ownership semantics (who should call unref?) and mutability
-   constraints (is the callee allowed to modify the slice?) */
-
-/* Reference count container for gpr_slice. Contains function pointers to
-   increment and decrement reference counts. Implementations should cleanup
-   when the reference count drops to zero.
-   Typically client code should not touch this, and use gpr_slice_malloc,
-   gpr_slice_new, or gpr_slice_new_with_len instead. */
-typedef struct gpr_slice_refcount {
-  void (*ref)(void *);
-  void (*unref)(void *);
-} gpr_slice_refcount;
-
-#define GPR_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1)
-
-/* A gpr_slice s, if initialized, represents the byte range
-   s.bytes[0..s.length-1].
-
-   It can have an associated ref count which has a destruction routine to be run
-   when the ref count reaches zero (see gpr_slice_new() and grp_slice_unref()).
-   Multiple gpr_slice values may share a ref count.
-
-   If the slice does not have a refcount, it represents an inlined small piece
-   of data that is copied by value. */
-typedef struct gpr_slice {
-  struct gpr_slice_refcount *refcount;
-  union {
-    struct {
-      uint8_t *bytes;
-      size_t length;
-    } refcounted;
-    struct {
-      uint8_t length;
-      uint8_t bytes[GPR_SLICE_INLINED_SIZE];
-    } inlined;
-  } data;
-} gpr_slice;
-
-#define GPR_SLICE_START_PTR(slice)                  \
-  ((slice).refcount ? (slice).data.refcounted.bytes \
-                    : (slice).data.inlined.bytes)
-#define GPR_SLICE_LENGTH(slice)                      \
-  ((slice).refcount ? (slice).data.refcounted.length \
-                    : (slice).data.inlined.length)
-#define GPR_SLICE_SET_LENGTH(slice, newlen)                               \
-  ((slice).refcount ? ((slice).data.refcounted.length = (size_t)(newlen)) \
-                    : ((slice).data.inlined.length = (uint8_t)(newlen)))
-#define GPR_SLICE_END_PTR(slice) \
-  GPR_SLICE_START_PTR(slice) + GPR_SLICE_LENGTH(slice)
-#define GPR_SLICE_IS_EMPTY(slice) (GPR_SLICE_LENGTH(slice) == 0)
-
-/* Increment the refcount of s. Requires slice is initialized.
-   Returns s. */
-gpr_slice gpr_slice_ref(gpr_slice s);
-
-/* Decrement the ref count of s.  If the ref count of s reaches zero, all
-   slices sharing the ref count are destroyed, and considered no longer
-   initialized.  If s is ultimately derived from a call to gpr_slice_new(start,
-   len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
-   ultimately derived from a call to gpr_slice_new_with_len(start, len, dest)
-   where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
-void gpr_slice_unref(gpr_slice s);
-
-/* Create a slice pointing at some data. Calls malloc to allocate a refcount
-   for the object, and arranges that destroy will be called with the pointer
-   passed in at destruction. */
-gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
-
-/* Equivalent to gpr_slice_new, but with a two argument destroy function that
-   also takes the slice length. */
-gpr_slice gpr_slice_new_with_len(void *p, size_t len,
-                                 void (*destroy)(void *, size_t));
-
-/* Equivalent to gpr_slice_new(malloc(len), len, free), but saves one malloc()
-   call.
-   Aborts if malloc() fails. */
-gpr_slice gpr_slice_malloc(size_t length);
-
-/* Create a slice by copying a string.
-   Does not preserve null terminators.
-   Equivalent to:
-     size_t len = strlen(source);
-     gpr_slice slice = gpr_slice_malloc(len);
-     memcpy(slice->data, source, len); */
-gpr_slice gpr_slice_from_copied_string(const char *source);
-
-/* Create a slice by copying a buffer.
-   Equivalent to:
-     gpr_slice slice = gpr_slice_malloc(len);
-     memcpy(slice->data, source, len); */
-gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
-
-/* Create a slice pointing to constant memory */
-gpr_slice gpr_slice_from_static_string(const char *source);
-
-/* Return a result slice derived from s, which shares a ref count with s, where
-   result.data==s.data+begin, and result.length==end-begin.
-   The ref count of s is increased by one.
-   Requires s initialized, begin <= end, begin <= s.length, and
-   end <= source->length. */
-gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
-
-/* The same as gpr_slice_sub, but without altering the ref count */
-gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
-
-/* Splits s into two: modifies s to be s[0:split], and returns a new slice,
-   sharing a refcount with s, that contains s[split:s.length].
-   Requires s intialized, split <= s.length */
-gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
-
-/* Splits s into two: modifies s to be s[split:s.length], and returns a new
-   slice, sharing a refcount with s, that contains s[0:split].
-   Requires s intialized, split <= s.length */
-gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
-
-gpr_slice gpr_empty_slice(void);
-
-/* Returns <0 if a < b, ==0 if a == b, >0 if a > b
-   The order is arbitrary, and is not guaranteed to be stable across different
-   versions of the API. */
-int gpr_slice_cmp(gpr_slice a, gpr_slice b);
-int gpr_slice_str_cmp(gpr_slice a, const char *b);
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/slice.h>
 
 #endif /* GRPC_SUPPORT_SLICE_H */
diff --git a/include/grpc/support/slice_buffer.h b/include/grpc/support/slice_buffer.h
index 99f3881b0e1d4384086a019eee7f234591aa7893..7bee4dde346cce94622b1b76eeed9c5c94ca973c 100644
--- a/include/grpc/support/slice_buffer.h
+++ b/include/grpc/support/slice_buffer.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,69 +34,6 @@
 #ifndef GRPC_SUPPORT_SLICE_BUFFER_H
 #define GRPC_SUPPORT_SLICE_BUFFER_H
 
-#include <grpc/support/slice.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
-
-/* Represents an expandable array of slices, to be interpreted as a single item
-   TODO(ctiller): inline some small number of elements into the struct, to
-                  avoid per-call allocations */
-typedef struct {
-  /* slices in the array */
-  gpr_slice *slices;
-  /* the number of slices in the array */
-  size_t count;
-  /* the number of slices allocated in the array */
-  size_t capacity;
-  /* the combined length of all slices in the array */
-  size_t length;
-  /* inlined elements to avoid allocations */
-  gpr_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
-} gpr_slice_buffer;
-
-/* initialize a slice buffer */
-void gpr_slice_buffer_init(gpr_slice_buffer *sb);
-/* destroy a slice buffer - unrefs any held elements */
-void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
-/* Add an element to a slice buffer - takes ownership of the slice.
-   This function is allowed to concatenate the passed in slice to the end of
-   some other slice if desired by the slice buffer. */
-void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
-/* add an element to a slice buffer - takes ownership of the slice and returns
-   the index of the slice.
-   Guarantees that the slice will not be concatenated at the end of another
-   slice (i.e. the data for this slice will begin at the first byte of the
-   slice at the returned index in sb->slices)
-   The implementation MAY decide to concatenate data at the end of a small
-   slice added in this fashion. */
-size_t gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb, gpr_slice slice);
-void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices, size_t n);
-/* add a very small (less than 8 bytes) amount of data to the end of a slice
-   buffer: returns a pointer into which to add the data */
-uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
-/* pop the last buffer, but don't unref it */
-void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
-/* clear a slice buffer, unref all elements */
-void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
-/* swap the contents of two slice buffers */
-void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
-/* move all of the elements of src into dst */
-void gpr_slice_buffer_move_into(gpr_slice_buffer *src, gpr_slice_buffer *dst);
-/* remove n bytes from the end of a slice buffer */
-void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
-                               gpr_slice_buffer *garbage);
-/* move the first n bytes of src into dst */
-void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
-                                 gpr_slice_buffer *dst);
-/* take the first slice in the slice buffer */
-gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/slice_buffer.h>
 
 #endif /* GRPC_SUPPORT_SLICE_BUFFER_H */
diff --git a/include/grpc/support/sync.h b/include/grpc/support/sync.h
index 4f42cff02a5791ee0dd967d764c2a3e6947616b6..89cc76f7848f34a3f7f56c1a87eeb8c7b33a93f2 100644
--- a/include/grpc/support/sync.h
+++ b/include/grpc/support/sync.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,283 +33,7 @@
 
 #ifndef GRPC_SUPPORT_SYNC_H
 #define GRPC_SUPPORT_SYNC_H
-/* Synchronization primitives for GPR.
 
-   The type  gpr_mu              provides a non-reentrant mutex (lock).
-
-   The type  gpr_cv              provides a condition variable.
-
-   The type  gpr_once            provides for one-time initialization.
-
-   The type gpr_event            provides one-time-setting, reading, and
-                                 waiting of a void*, with memory barriers.
-
-   The type gpr_refcount         provides an object reference counter,
-                                 with memory barriers suitable to control
-                                 object lifetimes.
-
-   The type gpr_stats_counter    provides an atomic statistics counter. It
-                                 provides no memory barriers.
- */
-
-/* Platform-specific type declarations of gpr_mu and gpr_cv.   */
-#include <grpc/support/port_platform.h>
-#include <grpc/support/sync_generic.h>
-
-#if defined(GPR_POSIX_SYNC)
-#include <grpc/support/sync_posix.h>
-#elif defined(GPR_WIN32)
-#include <grpc/support/sync_win32.h>
-#elif !defined(GPR_CUSTOM_SYNC)
-#error Unable to determine platform for sync
-#endif
-
-#include <grpc/support/time.h> /* for gpr_timespec */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* --- Mutex interface ---
-
-   At most one thread may hold an exclusive lock on a mutex at any given time.
-   Actions taken by a thread that holds a mutex exclusively happen after
-   actions taken by all previous holders of the mutex.  Variables of type
-   gpr_mu are uninitialized when first declared.  */
-
-/* Initialize *mu.  Requires:  *mu uninitialized.  */
-void gpr_mu_init(gpr_mu *mu);
-
-/* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
-   *mu initialized; no other concurrent operation on *mu.  */
-void gpr_mu_destroy(gpr_mu *mu);
-
-/* Wait until no thread has a lock on *mu, cause the calling thread to own an
-   exclusive lock on *mu, then return.  May block indefinitely or crash if the
-   calling thread has a lock on *mu.  Requires:  *mu initialized.  */
-void gpr_mu_lock(gpr_mu *mu);
-
-/* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
-   initialized; the calling thread holds an exclusive lock on *mu.  */
-void gpr_mu_unlock(gpr_mu *mu);
-
-/* Without blocking, attempt to acquire an exclusive lock on *mu for the
-   calling thread, then return non-zero iff success.  Fail, if any thread holds
-   the lock; succeeds with high probability if no thread holds the lock.
-   Requires:  *mu initialized.  */
-int gpr_mu_trylock(gpr_mu *mu);
-
-/* --- Condition variable interface ---
-
-   A while-loop should be used with gpr_cv_wait() when waiting for conditions
-   to become true.  See the example below.  Variables of type gpr_cv are
-   uninitialized when first declared.  */
-
-/* Initialize *cv.  Requires:  *cv uninitialized.  */
-void gpr_cv_init(gpr_cv *cv);
-
-/* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
-   *cv initialized; no other concurrent operation on *cv.*/
-void gpr_cv_destroy(gpr_cv *cv);
-
-/* Atomically release *mu and wait on *cv.  When the calling thread is woken
-   from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
-   and return whether the deadline was exceeded.  Use
-   abs_deadline==gpr_inf_future for no deadline.  May return even when not
-   woken explicitly.  Requires:  *mu and *cv initialized; the calling thread
-   holds an exclusive lock on *mu.  */
-int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
-
-/* If any threads are waiting on *cv, wake at least one.
-   Clients may treat this as an optimization of gpr_cv_broadcast()
-   for use in the case where waking more than one waiter is not useful.
-   Requires:  *cv initialized.  */
-void gpr_cv_signal(gpr_cv *cv);
-
-/* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
-void gpr_cv_broadcast(gpr_cv *cv);
-
-/* --- One-time initialization ---
-
-   gpr_once must be declared with static storage class, and initialized with
-   GPR_ONCE_INIT.  e.g.,
-     static gpr_once once_var = GPR_ONCE_INIT;     */
-
-/* Ensure that (*init_routine)() has been called exactly once (for the
-   specified gpr_once instance) and then return.
-   If multiple threads call gpr_once() on the same gpr_once instance, one of
-   them will call (*init_routine)(), and the others will block until that call
-   finishes.*/
-void gpr_once_init(gpr_once *once, void (*init_routine)(void));
-
-/* --- One-time event notification ---
-
-  These operations act on a gpr_event, which should be initialized with
-  gpr_ev_init(), or with GPR_EVENT_INIT if static, e.g.,
-       static gpr_event event_var = GPR_EVENT_INIT;
-  It requires no destruction.  */
-
-/* Initialize *ev. */
-void gpr_event_init(gpr_event *ev);
-
-/* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
-   Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
-   gpr_event_set(ev, ...) since initialization.  */
-void gpr_event_set(gpr_event *ev, void *value);
-
-/* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
-   completed.  If the result is non-NULL, all operations that occurred prior to
-   the gpr_event_set(ev, ...) set will be visible after this call returns.
-   Requires:  *ev initialized.  This operation is faster than acquiring a mutex
-   on most platforms.  */
-void *gpr_event_get(gpr_event *ev);
-
-/* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
-   exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
-   abs_deadline==gpr_inf_future for no deadline.  When the event has been
-   signalled before the call, this operation is faster than acquiring a mutex
-   on most platforms.  */
-void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
-
-/* --- Reference counting ---
-
-   These calls act on the type gpr_refcount.  It requires no destruction.  */
-
-/* Initialize *r to value n.  */
-void gpr_ref_init(gpr_refcount *r, int n);
-
-/* Increment the reference count *r.  Requires *r initialized. */
-void gpr_ref(gpr_refcount *r);
-
-/* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
-void gpr_refn(gpr_refcount *r, int n);
-
-/* Decrement the reference count *r and return non-zero iff it has reached
-   zero. .  Requires *r initialized. */
-int gpr_unref(gpr_refcount *r);
-
-/* --- Stats counters ---
-
-   These calls act on the integral type gpr_stats_counter.  It requires no
-   destruction.  Static instances may be initialized with
-       gpr_stats_counter c = GPR_STATS_INIT;
-   Beware:  These operations do not imply memory barriers.  Do not use them to
-   synchronize other events.  */
-
-/* Initialize *c to the value n. */
-void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
-
-/* *c += inc.  Requires: *c initialized. */
-void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
-
-/* Return *c.  Requires: *c initialized. */
-intptr_t gpr_stats_read(const gpr_stats_counter *c);
-
-/* ==================Example use of interface===================
-   A producer-consumer queue of up to N integers,
-   illustrating the use of the calls in this interface. */
-#if 0
-
-#define N 4
-
-   typedef struct queue {
-     gpr_cv non_empty;  /* Signalled when length becomes non-zero. */
-     gpr_cv non_full;   /* Signalled when length becomes non-N. */
-     gpr_mu mu;         /* Protects all fields below.
-                            (That is, except during initialization or
-                            destruction, the fields below should be accessed
-                            only by a thread that holds mu.) */
-     int head;           /* Index of head of queue 0..N-1. */
-     int length;         /* Number of valid elements in queue 0..N. */
-     int elem[N];        /* elem[head .. head+length-1] are queue elements. */
-   } queue;
-
-   /* Initialize *q. */
-   void queue_init(queue *q) {
-     gpr_mu_init(&q->mu);
-     gpr_cv_init(&q->non_empty);
-     gpr_cv_init(&q->non_full);
-     q->head = 0;
-     q->length = 0;
-   }
-
-   /* Free storage associated with *q. */
-   void queue_destroy(queue *q) {
-     gpr_mu_destroy(&q->mu);
-     gpr_cv_destroy(&q->non_empty);
-     gpr_cv_destroy(&q->non_full);
-   }
-
-   /* Wait until there is room in *q, then append x to *q. */
-   void queue_append(queue *q, int x) {
-     gpr_mu_lock(&q->mu);
-     /* To wait for a predicate without a deadline, loop on the negation of the
-        predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop
-        to release the lock, wait, and reacquire on each iteration.  Code that
-        makes the condition true should use gpr_cv_broadcast() on the
-        corresponding condition variable.  The predicate must be on state
-        protected by the lock.  */
-     while (q->length == N) {
-       gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future);
-     }
-     if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
-       /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
-          holding the lock. */
-       gpr_cv_broadcast(&q->non_empty);
-     }
-     q->elem[(q->head + q->length) % N] = x;
-     q->length++;
-     gpr_mu_unlock(&q->mu);
-   }
-
-   /* If it can be done without blocking, append x to *q and return non-zero.
-      Otherwise return 0. */
-   int queue_try_append(queue *q, int x) {
-     int result = 0;
-     if (gpr_mu_trylock(&q->mu)) {
-       if (q->length != N) {
-         if (q->length == 0) {  /* Wake threads blocked in queue_remove(). */
-           gpr_cv_broadcast(&q->non_empty);
-         }
-         q->elem[(q->head + q->length) % N] = x;
-         q->length++;
-         result = 1;
-       }
-       gpr_mu_unlock(&q->mu);
-     }
-     return result;
-   }
-
-   /* Wait until the *q is non-empty or deadline abs_deadline passes.  If the
-      queue is non-empty, remove its head entry, place it in *head, and return
-      non-zero.  Otherwise return 0.  */
-   int queue_remove(queue *q, int *head, gpr_timespec abs_deadline) {
-     int result = 0;
-     gpr_mu_lock(&q->mu);
-     /* To wait for a predicate with a deadline, loop on the negation of the
-        predicate or until gpr_cv_wait() returns true.  Code that makes
-        the condition true should use gpr_cv_broadcast() on the corresponding
-        condition variable.  The predicate must be on state protected by the
-        lock. */
-     while (q->length == 0 &&
-            !gpr_cv_wait(&q->non_empty, &q->mu, abs_deadline)) {
-     }
-     if (q->length != 0) {    /* Queue is non-empty. */
-       result = 1;
-       if (q->length == N) {  /* Wake threads blocked in queue_append(). */
-         gpr_cv_broadcast(&q->non_full);
-       }
-       *head = q->elem[q->head];
-       q->head = (q->head + 1) % N;
-       q->length--;
-     } /* else deadline exceeded */
-     gpr_mu_unlock(&q->mu);
-     return result;
-   }
-#endif /* 0 */
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/sync.h>
 
 #endif /* GRPC_SUPPORT_SYNC_H */
diff --git a/include/grpc/support/sync_generic.h b/include/grpc/support/sync_generic.h
index fd55e02ea8d549bccbdc006f3af582309134fcb2..28e3ab647be0b0d7cc0fecca5d8d4ec6d88df829 100644
--- a/include/grpc/support/sync_generic.h
+++ b/include/grpc/support/sync_generic.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,23 +33,7 @@
 
 #ifndef GRPC_SUPPORT_SYNC_GENERIC_H
 #define GRPC_SUPPORT_SYNC_GENERIC_H
-/* Generic type defintions for gpr_sync. */
 
-#include <grpc/support/atm.h>
-
-/* gpr_event */
-typedef struct { gpr_atm state; } gpr_event;
-
-#define GPR_EVENT_INIT \
-  { 0 }
-
-/* gpr_refcount */
-typedef struct { gpr_atm count; } gpr_refcount;
-
-/* gpr_stats_counter */
-typedef struct { gpr_atm value; } gpr_stats_counter;
-
-#define GPR_STATS_INIT \
-  { 0 }
+#include <grpc/impl/codegen/sync_generic.h>
 
 #endif /* GRPC_SUPPORT_SYNC_GENERIC_H */
diff --git a/include/grpc/support/sync_posix.h b/include/grpc/support/sync_posix.h
index 81ffa259007dd7c175a9dcf1b88db3f2500c708e..fa0324fbfa238056ebe73fe816c6f9c2fbdb6cd4 100644
--- a/include/grpc/support/sync_posix.h
+++ b/include/grpc/support/sync_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,14 +34,6 @@
 #ifndef GRPC_SUPPORT_SYNC_POSIX_H
 #define GRPC_SUPPORT_SYNC_POSIX_H
 
-#include <grpc/support/sync_generic.h>
-
-#include <pthread.h>
-
-typedef pthread_mutex_t gpr_mu;
-typedef pthread_cond_t gpr_cv;
-typedef pthread_once_t gpr_once;
-
-#define GPR_ONCE_INIT PTHREAD_ONCE_INIT
+#include <grpc/impl/codegen/sync_posix.h>
 
 #endif /* GRPC_SUPPORT_SYNC_POSIX_H */
diff --git a/include/grpc/support/sync_win32.h b/include/grpc/support/sync_win32.h
index 8ddbeaab9785e05e3f3e4fcf625ad666ef910c39..bfbc99e9712495fd45b9f71fbd5fcf5bae41d931 100644
--- a/include/grpc/support/sync_win32.h
+++ b/include/grpc/support/sync_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,16 +34,6 @@
 #ifndef GRPC_SUPPORT_SYNC_WIN32_H
 #define GRPC_SUPPORT_SYNC_WIN32_H
 
-#include <grpc/support/sync_generic.h>
-
-typedef struct {
-  CRITICAL_SECTION cs; /* Not an SRWLock until Vista is unsupported */
-  int locked;
-} gpr_mu;
-
-typedef CONDITION_VARIABLE gpr_cv;
-
-typedef INIT_ONCE gpr_once;
-#define GPR_ONCE_INIT INIT_ONCE_STATIC_INIT
+#include <grpc/impl/codegen/sync_win32.h>
 
 #endif /* GRPC_SUPPORT_SYNC_WIN32_H */
diff --git a/include/grpc/support/thd.h b/include/grpc/support/thd.h
index 58b8a8340ec9972e8791861f45b4c50365f41b87..56185cc8ea9538cb81f7228093b485fc5e2bf1f4 100644
--- a/include/grpc/support/thd.h
+++ b/include/grpc/support/thd.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,7 +48,7 @@
 extern "C" {
 #endif
 
-typedef uint64_t gpr_thd_id;
+typedef uintptr_t gpr_thd_id;
 
 /* Thread creation options. */
 typedef struct {
diff --git a/include/grpc/support/time.h b/include/grpc/support/time.h
index d2607f3e95512cda7ae3e2c276065f93534790b5..2c7f8533a2b1a4844e92617f5744903a93c376f1 100644
--- a/include/grpc/support/time.h
+++ b/include/grpc/support/time.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,96 +33,7 @@
 
 #ifndef GRPC_SUPPORT_TIME_H
 #define GRPC_SUPPORT_TIME_H
-/* Time support.
-   We use gpr_timespec, which is analogous to struct timespec.  On some
-   machines, absolute times may be in local time.  */
 
-#include <grpc/support/port_platform.h>
-#include <stddef.h>
-#include <time.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* The clocks we support. */
-typedef enum {
-  /* Monotonic clock. Epoch undefined. Always moves forwards. */
-  GPR_CLOCK_MONOTONIC = 0,
-  /* Realtime clock. May jump forwards or backwards. Settable by
-     the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */
-  GPR_CLOCK_REALTIME,
-  /* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
-     undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */
-  GPR_CLOCK_PRECISE,
-  /* Unmeasurable clock type: no base, created by taking the difference
-     between two times */
-  GPR_TIMESPAN
-} gpr_clock_type;
-
-typedef struct gpr_timespec {
-  int64_t tv_sec;
-  int32_t tv_nsec;
-  /** Against which clock was this time measured? (or GPR_TIMESPAN if
-      this is a relative time meaure) */
-  gpr_clock_type clock_type;
-} gpr_timespec;
-
-/* Time constants. */
-gpr_timespec gpr_time_0(gpr_clock_type type);     /* The zero time interval. */
-gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
-gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
-
-#define GPR_MS_PER_SEC 1000
-#define GPR_US_PER_SEC 1000000
-#define GPR_NS_PER_SEC 1000000000
-#define GPR_NS_PER_MS 1000000
-#define GPR_NS_PER_US 1000
-#define GPR_US_PER_MS 1000
-
-/* initialize time subsystem */
-void gpr_time_init(void);
-
-/* Return the current time measured from the given clocks epoch. */
-gpr_timespec gpr_now(gpr_clock_type clock);
-
-/* Convert a timespec from one clock to another */
-gpr_timespec gpr_convert_clock_type(gpr_timespec t,
-                                    gpr_clock_type target_clock);
-
-/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
-   respectively.  */
-int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
-
-gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
-gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
-
-/* Add and subtract times.  Calculations saturate at infinities. */
-gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
-gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
-
-/* Return a timespec representing a given number of time units. LONG_MIN is
-   interpreted as gpr_inf_past, and LONG_MAX as gpr_inf_future.  */
-gpr_timespec gpr_time_from_micros(long x, gpr_clock_type clock_type);
-gpr_timespec gpr_time_from_nanos(long x, gpr_clock_type clock_type);
-gpr_timespec gpr_time_from_millis(long x, gpr_clock_type clock_type);
-gpr_timespec gpr_time_from_seconds(long x, gpr_clock_type clock_type);
-gpr_timespec gpr_time_from_minutes(long x, gpr_clock_type clock_type);
-gpr_timespec gpr_time_from_hours(long x, gpr_clock_type clock_type);
-
-int32_t gpr_time_to_millis(gpr_timespec timespec);
-
-/* Return 1 if two times are equal or within threshold of each other,
-   0 otherwise */
-int gpr_time_similar(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
-
-/* Sleep until at least 'until' - an absolute timeout */
-void gpr_sleep_until(gpr_timespec until);
-
-double gpr_timespec_to_micros(gpr_timespec t);
-
-#ifdef __cplusplus
-}
-#endif
+#include <grpc/impl/codegen/time.h>
 
 #endif /* GRPC_SUPPORT_TIME_H */
diff --git a/package.json b/package.json
index 2abc266d11626047589774dd224813222dca63fa..f02a100bc7a46b43431e00acdbb35270848bf582 100644
--- a/package.json
+++ b/package.json
@@ -429,6 +429,26 @@
     "include/grpc/support/tls_msvc.h",
     "include/grpc/support/tls_pthread.h",
     "include/grpc/support/useful.h",
+    "include/grpc/impl/codegen/alloc.h",
+    "include/grpc/impl/codegen/atm.h",
+    "include/grpc/impl/codegen/atm_gcc_atomic.h",
+    "include/grpc/impl/codegen/atm_gcc_sync.h",
+    "include/grpc/impl/codegen/atm_win32.h",
+    "include/grpc/impl/codegen/byte_buffer.h",
+    "include/grpc/impl/codegen/compression_types.h",
+    "include/grpc/impl/codegen/connectivity_state.h",
+    "include/grpc/impl/codegen/grpc_types.h",
+    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/port_platform.h",
+    "include/grpc/impl/codegen/propagation_bits.h",
+    "include/grpc/impl/codegen/slice.h",
+    "include/grpc/impl/codegen/slice_buffer.h",
+    "include/grpc/impl/codegen/status.h",
+    "include/grpc/impl/codegen/sync.h",
+    "include/grpc/impl/codegen/sync_generic.h",
+    "include/grpc/impl/codegen/sync_posix.h",
+    "include/grpc/impl/codegen/sync_win32.h",
+    "include/grpc/impl/codegen/time.h",
     "src/core/profiling/timers.h",
     "src/core/support/block_annotate.h",
     "src/core/support/env.h",
diff --git a/setup.cfg b/setup.cfg
index add6ee8749205ca37fa85d0b092404ecfca1a78a..7194716f61b292aeb38f59613dfe8d3a32359ab3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,6 +3,9 @@
 [coverage:run]
 plugins = Cython.Coverage
 
+[build]
+build_base=python_build
+
 [build_ext]
 inplace=1
 
diff --git a/setup.py b/setup.py
index 52d3d2241ef95ea052d595e5f6348d07d0b0961d..01e91808543760675f8b550488a76f72b56851d0 100644
--- a/setup.py
+++ b/setup.py
@@ -119,6 +119,7 @@ PACKAGE_DIRECTORIES = {
 }
 
 INSTALL_REQUIRES = (
+    'six>=1.10',
     'enum34>=1.0.4',
     'futures>=2.2.0',
     # TODO(atash): eventually split the grpcio package into a metapackage
@@ -131,6 +132,7 @@ SETUP_REQUIRES = (
 ) + INSTALL_REQUIRES
 
 COMMAND_CLASS = {
+    'install': commands.Install,
     'doc': commands.SphinxDocumentation,
     'build_proto_modules': commands.BuildProtoModules,
     'build_project_metadata': commands.BuildProjectMetadata,
@@ -138,6 +140,7 @@ COMMAND_CLASS = {
     'build_ext': commands.BuildExt,
     'gather': commands.Gather,
     'run_interop': commands.RunInterop,
+    'bdist_egg_grpc_custom': commands.BdistEggCustomName,
 }
 
 # Ensure that package data is copied over before any commands have been run:
@@ -187,7 +190,7 @@ else:
 
 setuptools.setup(
     name='grpcio',
-    version='0.12.0b5',
+    version='0.12.0b6',
     license=LICENSE,
     ext_modules=CYTHON_EXTENSION_MODULES,
     packages=list(PACKAGES),
diff --git a/src/boringssl/gen_build_yaml.py b/src/boringssl/gen_build_yaml.py
index b635ee4c1399e4c1b80627c2489557711f4204fc..7c7a57993f753910fb6ecd0fc1eacdb77d87949c 100755
--- a/src/boringssl/gen_build_yaml.py
+++ b/src/boringssl/gen_build_yaml.py
@@ -82,6 +82,7 @@ class Grpc(object):
               for f in files['ssl_headers'] + files['ssl_internal_headers'] + files['crypto_headers'] + files['crypto_internal_headers']
             ),
             'boringssl': True,
+            'defaults': 'boringssl',
           },
           {
             'name': 'boringssl_test_util',
@@ -89,6 +90,7 @@ class Grpc(object):
             'language': 'c++',
             'secure': 'no',
             'boringssl': True,
+            'defaults': 'boringssl',
             'src': [
               map_dir(f)
               for f in sorted(files['test_support'])
@@ -103,6 +105,7 @@ class Grpc(object):
             'src': [map_dir(test)],
             'vs_proj_dir': 'test/boringssl',
             'boringssl': True,
+            'defaults': 'boringssl',
             'deps': [
                 'boringssl_test_util',
                 'boringssl',
@@ -120,6 +123,7 @@ class Grpc(object):
             'src': [],
             'vs_proj_dir': 'test/boringssl',
             'boringssl': True,
+            'defaults': 'boringssl',
             'deps': [
                 'boringssl_%s_lib' % os.path.splitext(os.path.basename(test))[0],
                 'boringssl_test_util',
@@ -138,6 +142,7 @@ class Grpc(object):
             'flaky': False,
             'language': 'c++',
             'boringssl': True,
+            'defaults': 'boringssl',
             'cpu_cost': 1.0
           }
           for test in files['tests']
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index 3c8ca8ab45dc0880f6a71d679502cef0aac6eacc..d3d6224de2942982ae8052c73e88a0c6487b3ef3 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -112,18 +112,17 @@ grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
 grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params) {
   grpc::string temp =
-      "#include <grpc++/support/async_stream.h>\n"
-      "#include <grpc++/impl/rpc_method.h>\n"
-      "#include <grpc++/impl/proto_utils.h>\n"
-      "#include <grpc++/impl/service_type.h>\n"
-      "#include <grpc++/support/async_unary_call.h>\n"
-      "#include <grpc++/support/status.h>\n"
-      "#include <grpc++/support/stub_options.h>\n"
-      "#include <grpc++/support/sync_stream.h>\n"
+      "#include <grpc++/impl/codegen/async_stream.h>\n"
+      "#include <grpc++/impl/codegen/async_unary_call.h>\n"
+      "#include <grpc++/impl/codegen/proto_utils.h>\n"
+      "#include <grpc++/impl/codegen/rpc_method.h>\n"
+      "#include <grpc++/impl/codegen/service_type.h>\n"
+      "#include <grpc++/impl/codegen/status.h>\n"
+      "#include <grpc++/impl/codegen/stub_options.h>\n"
+      "#include <grpc++/impl/codegen/sync_stream.h>\n"
       "\n"
       "namespace grpc {\n"
       "class CompletionQueue;\n"
-      "class Channel;\n"
       "class RpcService;\n"
       "class ServerCompletionQueue;\n"
       "class ServerContext;\n"
@@ -491,39 +490,186 @@ void PrintHeaderServerMethodAsync(
       grpc_cpp_generator::ClassName(method->input_type(), true);
   (*vars)["Response"] =
       grpc_cpp_generator::ClassName(method->output_type(), true);
+  printer->Print(*vars, "template <class BaseClass>\n");
+  printer->Print(*vars,
+                 "class WithAsyncMethod_$Method$ : public BaseClass {\n");
+  printer->Print(
+      " private:\n"
+      "  void BaseClassMustBeDerivedFromService(Service *service) {}\n");
+  printer->Print(" public:\n");
+  printer->Indent();
+  printer->Print(*vars,
+                 "WithAsyncMethod_$Method$() {\n"
+                 "  ::grpc::Service::MarkMethodAsync($Idx$);\n"
+                 "}\n");
+  printer->Print(*vars,
+                 "~WithAsyncMethod_$Method$() GRPC_OVERRIDE {\n"
+                 "  BaseClassMustBeDerivedFromService(this);\n"
+                 "}\n");
   if (NoStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, const $Request$* request, "
+        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
     printer->Print(
         *vars,
         "void Request$Method$("
         "::grpc::ServerContext* context, $Request$* request, "
         "::grpc::ServerAsyncResponseWriter< $Response$>* response, "
         "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag);\n");
+        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
+    printer->Print(*vars,
+                   "  ::grpc::Service::RequestAsyncUnary($Idx$, context, "
+                   "request, response, new_call_cq, notification_cq, tag);\n");
+    printer->Print("}\n");
   } else if (ClientOnlyStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, "
+        "::grpc::ServerReader< $Request$>* reader, "
+        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
     printer->Print(
         *vars,
         "void Request$Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerAsyncReader< $Response$, $Request$>* reader, "
         "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag);\n");
+        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
+    printer->Print(*vars,
+                   "  ::grpc::Service::RequestAsyncClientStreaming($Idx$, "
+                   "context, reader, new_call_cq, notification_cq, tag);\n");
+    printer->Print("}\n");
   } else if (ServerOnlyStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, const $Request$* request, "
+        "::grpc::ServerWriter< $Response$>* writer) GRPC_FINAL GRPC_OVERRIDE "
+        "{\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
     printer->Print(
         *vars,
         "void Request$Method$("
         "::grpc::ServerContext* context, $Request$* request, "
         "::grpc::ServerAsyncWriter< $Response$>* writer, "
         "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag);\n");
+        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
+    printer->Print(
+        *vars,
+        "  ::grpc::Service::RequestAsyncServerStreaming($Idx$, "
+        "context, request, writer, new_call_cq, notification_cq, tag);\n");
+    printer->Print("}\n");
   } else if (BidiStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, "
+        "::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
+        "GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
     printer->Print(
         *vars,
         "void Request$Method$("
         "::grpc::ServerContext* context, "
         "::grpc::ServerAsyncReaderWriter< $Response$, $Request$>* stream, "
         "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag);\n");
+        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
+    printer->Print(*vars,
+                   "  ::grpc::Service::RequestAsyncBidiStreaming($Idx$, "
+                   "context, stream, new_call_cq, notification_cq, tag);\n");
+    printer->Print("}\n");
+  }
+  printer->Outdent();
+  printer->Print(*vars, "};\n");
+}
+
+void PrintHeaderServerMethodGeneric(
+    grpc::protobuf::io::Printer *printer,
+    const grpc::protobuf::MethodDescriptor *method,
+    std::map<grpc::string, grpc::string> *vars) {
+  (*vars)["Method"] = method->name();
+  (*vars)["Request"] =
+      grpc_cpp_generator::ClassName(method->input_type(), true);
+  (*vars)["Response"] =
+      grpc_cpp_generator::ClassName(method->output_type(), true);
+  printer->Print(*vars, "template <class BaseClass>\n");
+  printer->Print(*vars,
+                 "class WithGenericMethod_$Method$ : public BaseClass {\n");
+  printer->Print(
+      " private:\n"
+      "  void BaseClassMustBeDerivedFromService(Service *service) {}\n");
+  printer->Print(" public:\n");
+  printer->Indent();
+  printer->Print(*vars,
+                 "WithGenericMethod_$Method$() {\n"
+                 "  ::grpc::Service::MarkMethodGeneric($Idx$);\n"
+                 "}\n");
+  printer->Print(*vars,
+                 "~WithGenericMethod_$Method$() GRPC_OVERRIDE {\n"
+                 "  BaseClassMustBeDerivedFromService(this);\n"
+                 "}\n");
+  if (NoStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, const $Request$* request, "
+        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
+  } else if (ClientOnlyStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, "
+        "::grpc::ServerReader< $Request$>* reader, "
+        "$Response$* response) GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
+  } else if (ServerOnlyStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, const $Request$* request, "
+        "::grpc::ServerWriter< $Response$>* writer) GRPC_FINAL GRPC_OVERRIDE "
+        "{\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
+  } else if (BidiStreaming(method)) {
+    printer->Print(
+        *vars,
+        "// disable synchronous version of this method\n"
+        "::grpc::Status $Method$("
+        "::grpc::ServerContext* context, "
+        "::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
+        "GRPC_FINAL GRPC_OVERRIDE {\n"
+        "  abort();\n"
+        "  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
+        "}\n");
   }
+  printer->Outdent();
+  printer->Print(*vars, "};\n");
 }
 
 void PrintHeaderService(grpc::protobuf::io::Printer *printer,
@@ -557,14 +703,14 @@ void PrintHeaderService(grpc::protobuf::io::Printer *printer,
       "class Stub GRPC_FINAL : public StubInterface"
       " {\n public:\n");
   printer->Indent();
-  printer->Print("Stub(const std::shared_ptr< ::grpc::Channel>& channel);\n");
+  printer->Print("Stub(const std::shared_ptr< ::grpc::ChannelInterface>& channel);\n");
   for (int i = 0; i < service->method_count(); ++i) {
     PrintHeaderClientMethod(printer, service->method(i), vars, true);
   }
   printer->Outdent();
   printer->Print("\n private:\n");
   printer->Indent();
-  printer->Print("std::shared_ptr< ::grpc::Channel> channel_;\n");
+  printer->Print("std::shared_ptr< ::grpc::ChannelInterface> channel_;\n");
   for (int i = 0; i < service->method_count(); ++i) {
     PrintHeaderClientMethod(printer, service->method(i), vars, false);
   }
@@ -575,14 +721,14 @@ void PrintHeaderService(grpc::protobuf::io::Printer *printer,
   printer->Print("};\n");
   printer->Print(
       "static std::unique_ptr<Stub> NewStub(const std::shared_ptr< "
-      "::grpc::Channel>& channel, "
+      "::grpc::ChannelInterface>& channel, "
       "const ::grpc::StubOptions& options = ::grpc::StubOptions());\n");
 
   printer->Print("\n");
 
-  // Server side - Synchronous
+  // Server side - base
   printer->Print(
-      "class Service : public ::grpc::SynchronousService {\n"
+      "class Service : public ::grpc::Service {\n"
       " public:\n");
   printer->Indent();
   printer->Print("Service();\n");
@@ -590,26 +736,32 @@ void PrintHeaderService(grpc::protobuf::io::Printer *printer,
   for (int i = 0; i < service->method_count(); ++i) {
     PrintHeaderServerMethodSync(printer, service->method(i), vars);
   }
-  printer->Print("::grpc::RpcService* service() GRPC_OVERRIDE GRPC_FINAL;\n");
   printer->Outdent();
-  printer->Print(
-      " private:\n"
-      "  std::unique_ptr< ::grpc::RpcService> service_;\n");
   printer->Print("};\n");
 
   // Server side - Asynchronous
-  printer->Print(
-      "class AsyncService GRPC_FINAL : public ::grpc::AsynchronousService {\n"
-      " public:\n");
-  printer->Indent();
-  (*vars)["MethodCount"] = as_string(service->method_count());
-  printer->Print("explicit AsyncService();\n");
-  printer->Print("~AsyncService() {};\n");
   for (int i = 0; i < service->method_count(); ++i) {
+    (*vars)["Idx"] = as_string(i);
     PrintHeaderServerMethodAsync(printer, service->method(i), vars);
   }
-  printer->Outdent();
-  printer->Print("};\n");
+
+  printer->Print("typedef ");
+
+  for (int i = 0; i < service->method_count(); ++i) {
+    (*vars)["method_name"] = service->method(i)->name();
+    printer->Print(*vars, "WithAsyncMethod_$method_name$<");
+  }
+  printer->Print("Service");
+  for (int i = 0; i < service->method_count(); ++i) {
+    printer->Print(" >");
+  }
+  printer->Print(" AsyncService;\n");
+
+  // Server side - Generic
+  for (int i = 0; i < service->method_count(); ++i) {
+    (*vars)["Idx"] = as_string(i);
+    PrintHeaderServerMethodGeneric(printer, service->method(i), vars);
+  }
 
   printer->Outdent();
   printer->Print("};\n");
@@ -623,6 +775,12 @@ grpc::string GetHeaderServices(const grpc::protobuf::FileDescriptor *file,
     grpc::protobuf::io::StringOutputStream output_stream(&output);
     grpc::protobuf::io::Printer printer(&output_stream, '$');
     std::map<grpc::string, grpc::string> vars;
+    // Package string is empty or ends with a dot. It is used to fully qualify
+    // method names.
+    vars["Package"] = file->package();
+    if (!file->package().empty()) {
+      vars["Package"].append(".");
+    }
 
     if (!params.services_namespace.empty()) {
       vars["services_namespace"] = params.services_namespace;
@@ -702,13 +860,16 @@ grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
     grpc::protobuf::io::Printer printer(&output_stream, '$');
     std::map<grpc::string, grpc::string> vars;
 
-    printer.Print(vars, "#include <grpc++/channel.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/client_unary_call.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/rpc_service_method.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/service_type.h>\n");
-    printer.Print(vars, "#include <grpc++/support/async_unary_call.h>\n");
-    printer.Print(vars, "#include <grpc++/support/async_stream.h>\n");
-    printer.Print(vars, "#include <grpc++/support/sync_stream.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/async_stream.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/async_unary_call.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/channel_interface.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/client_unary_call.h>\n");
+    printer.Print(vars,
+                  "#include <grpc++/impl/codegen/method_handler_impl.h>\n");
+    printer.Print(vars,
+                  "#include <grpc++/impl/codegen/rpc_service_method.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/service_type.h>\n");
+    printer.Print(vars, "#include <grpc++/impl/codegen/sync_stream.h>\n");
 
     if (!file->package().empty()) {
       std::vector<grpc::string> parts =
@@ -889,69 +1050,6 @@ void PrintSourceServerMethod(grpc::protobuf::io::Printer *printer,
   }
 }
 
-void PrintSourceServerAsyncMethod(
-    grpc::protobuf::io::Printer *printer,
-    const grpc::protobuf::MethodDescriptor *method,
-    std::map<grpc::string, grpc::string> *vars) {
-  (*vars)["Method"] = method->name();
-  (*vars)["Request"] =
-      grpc_cpp_generator::ClassName(method->input_type(), true);
-  (*vars)["Response"] =
-      grpc_cpp_generator::ClassName(method->output_type(), true);
-  if (NoStreaming(method)) {
-    printer->Print(
-        *vars,
-        "void $ns$$Service$::AsyncService::Request$Method$("
-        "::grpc::ServerContext* context, "
-        "$Request$* request, "
-        "::grpc::ServerAsyncResponseWriter< $Response$>* response, "
-        "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
-    printer->Print(*vars,
-                   "  AsynchronousService::RequestAsyncUnary($Idx$, context, "
-                   "request, response, new_call_cq, notification_cq, tag);\n");
-    printer->Print("}\n\n");
-  } else if (ClientOnlyStreaming(method)) {
-    printer->Print(
-        *vars,
-        "void $ns$$Service$::AsyncService::Request$Method$("
-        "::grpc::ServerContext* context, "
-        "::grpc::ServerAsyncReader< $Response$, $Request$>* reader, "
-        "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
-    printer->Print(*vars,
-                   "  AsynchronousService::RequestClientStreaming($Idx$, "
-                   "context, reader, new_call_cq, notification_cq, tag);\n");
-    printer->Print("}\n\n");
-  } else if (ServerOnlyStreaming(method)) {
-    printer->Print(
-        *vars,
-        "void $ns$$Service$::AsyncService::Request$Method$("
-        "::grpc::ServerContext* context, "
-        "$Request$* request, "
-        "::grpc::ServerAsyncWriter< $Response$>* writer, "
-        "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
-    printer->Print(
-        *vars,
-        "  AsynchronousService::RequestServerStreaming($Idx$, "
-        "context, request, writer, new_call_cq, notification_cq, tag);\n");
-    printer->Print("}\n\n");
-  } else if (BidiStreaming(method)) {
-    printer->Print(
-        *vars,
-        "void $ns$$Service$::AsyncService::Request$Method$("
-        "::grpc::ServerContext* context, "
-        "::grpc::ServerAsyncReaderWriter< $Response$, $Request$>* stream, "
-        "::grpc::CompletionQueue* new_call_cq, "
-        "::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
-    printer->Print(*vars,
-                   "  AsynchronousService::RequestBidiStreaming($Idx$, "
-                   "context, stream, new_call_cq, notification_cq, tag);\n");
-    printer->Print("}\n\n");
-  }
-}
-
 void PrintSourceService(grpc::protobuf::io::Printer *printer,
                         const grpc::protobuf::ServiceDescriptor *service,
                         std::map<grpc::string, grpc::string> *vars) {
@@ -967,7 +1065,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
 
   printer->Print(*vars,
                  "std::unique_ptr< $ns$$Service$::Stub> $ns$$Service$::NewStub("
-                 "const std::shared_ptr< ::grpc::Channel>& channel, "
+                 "const std::shared_ptr< ::grpc::ChannelInterface>& channel, "
                  "const ::grpc::StubOptions& options) {\n"
                  "  std::unique_ptr< $ns$$Service$::Stub> stub(new "
                  "$ns$$Service$::Stub(channel));\n"
@@ -975,7 +1073,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
                  "}\n\n");
   printer->Print(*vars,
                  "$ns$$Service$::Stub::Stub(const std::shared_ptr< "
-                 "::grpc::Channel>& channel)\n");
+                 "::grpc::ChannelInterface>& channel)\n");
   printer->Indent();
   printer->Print(": channel_(channel)");
   for (int i = 0; i < service->method_count(); ++i) {
@@ -1006,32 +1104,8 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
     PrintSourceClientMethod(printer, service->method(i), vars);
   }
 
-  (*vars)["MethodCount"] = as_string(service->method_count());
-  printer->Print(*vars,
-                 "$ns$$Service$::AsyncService::AsyncService() : "
-                 "::grpc::AsynchronousService("
-                 "$prefix$$Service$_method_names, $MethodCount$) "
-                 "{}\n\n");
-
-  printer->Print(*vars,
-                 "$ns$$Service$::Service::Service() {\n"
-                 "}\n\n");
-  printer->Print(*vars,
-                 "$ns$$Service$::Service::~Service() {\n"
-                 "}\n\n");
-  for (int i = 0; i < service->method_count(); ++i) {
-    (*vars)["Idx"] = as_string(i);
-    PrintSourceServerMethod(printer, service->method(i), vars);
-    PrintSourceServerAsyncMethod(printer, service->method(i), vars);
-  }
-  printer->Print(*vars,
-                 "::grpc::RpcService* $ns$$Service$::Service::service() {\n");
+  printer->Print(*vars, "$ns$$Service$::Service::Service() {\n");
   printer->Indent();
-  printer->Print(
-      "if (service_) {\n"
-      "  return service_.get();\n"
-      "}\n");
-  printer->Print("service_ = std::unique_ptr< ::grpc::RpcService>(new ::grpc::RpcService());\n");
   for (int i = 0; i < service->method_count(); ++i) {
     const grpc::protobuf::MethodDescriptor *method = service->method(i);
     (*vars)["Idx"] = as_string(i);
@@ -1043,7 +1117,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
     if (NoStreaming(method)) {
       printer->Print(
           *vars,
-          "service_->AddMethod(new ::grpc::RpcServiceMethod(\n"
+          "AddMethod(new ::grpc::RpcServiceMethod(\n"
           "    $prefix$$Service$_method_names[$Idx$],\n"
           "    ::grpc::RpcMethod::NORMAL_RPC,\n"
           "    new ::grpc::RpcMethodHandler< $ns$$Service$::Service, "
@@ -1053,7 +1127,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
     } else if (ClientOnlyStreaming(method)) {
       printer->Print(
           *vars,
-          "service_->AddMethod(new ::grpc::RpcServiceMethod(\n"
+          "AddMethod(new ::grpc::RpcServiceMethod(\n"
           "    $prefix$$Service$_method_names[$Idx$],\n"
           "    ::grpc::RpcMethod::CLIENT_STREAMING,\n"
           "    new ::grpc::ClientStreamingHandler< "
@@ -1062,7 +1136,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
     } else if (ServerOnlyStreaming(method)) {
       printer->Print(
           *vars,
-          "service_->AddMethod(new ::grpc::RpcServiceMethod(\n"
+          "AddMethod(new ::grpc::RpcServiceMethod(\n"
           "    $prefix$$Service$_method_names[$Idx$],\n"
           "    ::grpc::RpcMethod::SERVER_STREAMING,\n"
           "    new ::grpc::ServerStreamingHandler< "
@@ -1071,7 +1145,7 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
     } else if (BidiStreaming(method)) {
       printer->Print(
           *vars,
-          "service_->AddMethod(new ::grpc::RpcServiceMethod(\n"
+          "AddMethod(new ::grpc::RpcServiceMethod(\n"
           "    $prefix$$Service$_method_names[$Idx$],\n"
           "    ::grpc::RpcMethod::BIDI_STREAMING,\n"
           "    new ::grpc::BidiStreamingHandler< "
@@ -1079,9 +1153,15 @@ void PrintSourceService(grpc::protobuf::io::Printer *printer,
           "        std::mem_fn(&$ns$$Service$::Service::$Method$), this)));\n");
     }
   }
-  printer->Print("return service_.get();\n");
   printer->Outdent();
-  printer->Print("}\n\n");
+  printer->Print(*vars, "}\n\n");
+  printer->Print(*vars,
+                 "$ns$$Service$::Service::~Service() {\n"
+                 "}\n\n");
+  for (int i = 0; i < service->method_count(); ++i) {
+    (*vars)["Idx"] = as_string(i);
+    PrintSourceServerMethod(printer, service->method(i), vars);
+  }
 }
 
 grpc::string GetSourceServices(const grpc::protobuf::FileDescriptor *file,
diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index c754ae299b4cade4f73d6cf7b307343f1d9488b7..4fd5dfbecb16881442365bd186225a01a8847627 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -42,7 +42,6 @@
 #include <tuple>
 #include <vector>
 
-#include <grpc++/support/config.h>
 #include "src/compiler/config.h"
 #include "src/compiler/generator_helpers.h"
 #include "src/compiler/python_generator.h"
diff --git a/src/core/census/grpc_filter.c b/src/core/census/grpc_filter.c
index ee1f62f8c2f30795c5f5543241db9b1f282be969..a8db32b9d54dd01bc9437c85263523762dc6ebdf 100644
--- a/src/core/census/grpc_filter.c
+++ b/src/core/census/grpc_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -91,7 +91,7 @@ static void client_start_transport_op(grpc_exec_ctx *exec_ctx,
 }
 
 static void server_on_done_recv(grpc_exec_ctx *exec_ctx, void *ptr,
-                                int success) {
+                                bool success) {
   grpc_call_element *elem = ptr;
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
diff --git a/src/core/channel/channel_args.c b/src/core/channel/channel_args.c
index 487db1119a5bf33ab473ef35538ad05c5bc07961..0427ce0b8dc05381076a4e2d1f3bf4369d8bbc00 100644
--- a/src/core/channel/channel_args.c
+++ b/src/core/channel/channel_args.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,7 @@
 #include "src/core/channel/channel_args.h"
 #include "src/core/support/string.h"
 
+#include <grpc/census.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
@@ -119,10 +120,10 @@ int grpc_channel_args_is_census_enabled(const grpc_channel_args *a) {
   if (a == NULL) return 0;
   for (i = 0; i < a->num_args; i++) {
     if (0 == strcmp(a->args[i].key, GRPC_ARG_ENABLE_CENSUS)) {
-      return a->args[i].value.integer != 0;
+      return a->args[i].value.integer != 0 && census_enabled();
     }
   }
-  return 0;
+  return census_enabled();
 }
 
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
diff --git a/src/core/channel/client_channel.c b/src/core/channel/client_channel.c
index a92a6ecaf2a58a7c2d18c57bb2acbff2bce2cb70..7176c01b05f11f3ed8e46183e06348a9ff439a38 100644
--- a/src/core/channel/client_channel.c
+++ b/src/core/channel/client_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -135,7 +135,7 @@ static void on_lb_policy_state_changed_locked(
 }
 
 static void on_lb_policy_state_changed(grpc_exec_ctx *exec_ctx, void *arg,
-                                       int iomgr_success) {
+                                       bool iomgr_success) {
   lb_policy_connectivity_watcher *w = arg;
 
   gpr_mu_lock(&w->chand->mu_config);
@@ -161,7 +161,7 @@ static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand,
 }
 
 static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
-                                 int iomgr_success) {
+                                 bool iomgr_success) {
   channel_data *chand = arg;
   grpc_lb_policy *lb_policy = NULL;
   grpc_lb_policy *old_lb_policy;
@@ -191,7 +191,8 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
   old_lb_policy = chand->lb_policy;
   chand->lb_policy = lb_policy;
   if (lb_policy != NULL || chand->resolver == NULL /* disconnected */) {
-    grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures);
+    grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures,
+                               NULL);
   }
   if (lb_policy != NULL && chand->exit_idle_when_lb_policy_arrives) {
     GRPC_LB_POLICY_REF(lb_policy, "exit_idle");
@@ -249,7 +250,7 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
   channel_data *chand = elem->channel_data;
   grpc_resolver *destroy_resolver = NULL;
 
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL);
 
   GPR_ASSERT(op->set_accept_stream == NULL);
   if (op->bind_pollset != NULL) {
@@ -268,7 +269,7 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
 
   if (op->send_ping != NULL) {
     if (chand->lb_policy == NULL) {
-      grpc_exec_ctx_enqueue(exec_ctx, op->send_ping, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, op->send_ping, false, NULL);
     } else {
       grpc_lb_policy_ping_one(exec_ctx, chand->lb_policy, op->send_ping);
       op->bind_pollset = NULL;
@@ -310,15 +311,15 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
                               grpc_connected_subchannel **connected_subchannel,
                               grpc_closure *on_ready);
 
-static void continue_picking(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void continue_picking(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   continue_picking_args *cpa = arg;
   if (!success) {
-    grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, false, NULL);
   } else if (cpa->connected_subchannel == NULL) {
     /* cancelled, do nothing */
   } else if (cc_pick_subchannel(exec_ctx, cpa->elem, cpa->initial_metadata,
                                 cpa->connected_subchannel, cpa->on_ready)) {
-    grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, true, NULL);
   }
   gpr_free(cpa);
 }
@@ -346,7 +347,7 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
       cpa = closure->cb_arg;
       if (cpa->connected_subchannel == connected_subchannel) {
         cpa->connected_subchannel = NULL;
-        grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 0);
+        grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, false, NULL);
       }
     }
     gpr_mu_unlock(&chand->mu_config);
@@ -497,7 +498,7 @@ typedef struct {
 } external_connectivity_watcher;
 
 static void on_external_watch_complete(grpc_exec_ctx *exec_ctx, void *arg,
-                                       int iomgr_success) {
+                                       bool iomgr_success) {
   external_connectivity_watcher *w = arg;
   grpc_closure *follow_up = w->on_complete;
   grpc_pollset_set_del_pollset(exec_ctx, &w->chand->interested_parties,
diff --git a/src/core/channel/client_uchannel.c b/src/core/channel/client_uchannel.c
index 2c0b07d8bfc0d9b3ad033df5d9f7c6d4a90b00b7..b1e7155773fd68eda130e652cdadb87fba45e85d 100644
--- a/src/core/channel/client_uchannel.c
+++ b/src/core/channel/client_uchannel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -79,7 +79,7 @@ typedef struct client_uchannel_channel_data {
 typedef grpc_subchannel_call_holder call_data;
 
 static void monitor_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
-                               int iomgr_success) {
+                               bool iomgr_success) {
   channel_data *chand = arg;
   grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
                               chand->subchannel_connectivity,
@@ -105,7 +105,7 @@ static void cuc_start_transport_op(grpc_exec_ctx *exec_ctx,
                                    grpc_transport_op *op) {
   channel_data *chand = elem->channel_data;
 
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL);
 
   GPR_ASSERT(op->set_accept_stream == NULL);
   GPR_ASSERT(op->bind_pollset == NULL);
diff --git a/src/core/channel/compress_filter.c b/src/core/channel/compress_filter.c
index 3de1ef8a35a5d7fdb5438fb5e58a1393ca40d5ff..3e7ca08fd29e7b1d73eb4b8ea352ac854e0963dc 100644
--- a/src/core/channel/compress_filter.c
+++ b/src/core/channel/compress_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -153,7 +153,7 @@ static void process_send_initial_metadata(
 static void continue_send_message(grpc_exec_ctx *exec_ctx,
                                   grpc_call_element *elem);
 
-static void send_done(grpc_exec_ctx *exec_ctx, void *elemp, int success) {
+static void send_done(grpc_exec_ctx *exec_ctx, void *elemp, bool success) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
   gpr_slice_buffer_reset_and_unref(&calld->slices);
@@ -183,7 +183,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
   grpc_call_next_op(exec_ctx, elem, &calld->send_op);
 }
 
-static void got_slice(grpc_exec_ctx *exec_ctx, void *elemp, int success) {
+static void got_slice(grpc_exec_ctx *exec_ctx, void *elemp, bool success) {
   grpc_call_element *elem = elemp;
   call_data *calld = elem->call_data;
   gpr_slice_buffer_add(&calld->slices, calld->incoming_slice);
diff --git a/src/core/channel/http_client_filter.c b/src/core/channel/http_client_filter.c
index 65cfb778bbfe13e2d87771c9cd969c2bdbed0daf..43eee046b888cc12ce4496377f7191f07acf2227 100644
--- a/src/core/channel/http_client_filter.c
+++ b/src/core/channel/http_client_filter.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -80,7 +80,7 @@ static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) {
   return md;
 }
 
-static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
+static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
   client_recv_filter_args a;
diff --git a/src/core/channel/http_server_filter.c b/src/core/channel/http_server_filter.c
index a10b1054943b1df1d6a72d7fc468e4c882c4f75b..bb75323933c7357f9f226c7e958a958a6a25e22d 100644
--- a/src/core/channel/http_server_filter.c
+++ b/src/core/channel/http_server_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -131,7 +131,7 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
   }
 }
 
-static void hs_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
+static void hs_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
   if (success) {
diff --git a/src/core/channel/subchannel_call_holder.c b/src/core/channel/subchannel_call_holder.c
index 1e8f4ba1b6b45ccd1071d642bc8761522c668004..3ad9fd9efb14c43f9ec114ea07fcdb401b3e8c82 100644
--- a/src/core/channel/subchannel_call_holder.c
+++ b/src/core/channel/subchannel_call_holder.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,9 +43,9 @@
 #define CANCELLED_CALL ((grpc_subchannel_call *)1)
 
 static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *holder,
-                             int success);
+                             bool success);
 static void retry_ops(grpc_exec_ctx *exec_ctx, void *retry_ops_args,
-                      int success);
+                      bool success);
 
 static void add_waiting_locked(grpc_subchannel_call_holder *holder,
                                grpc_transport_stream_op *op);
@@ -166,7 +166,7 @@ retry:
   GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0);
 }
 
-static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_subchannel_call_holder *holder = arg;
   grpc_subchannel_call *call;
   gpr_mu_lock(&holder->mu);
@@ -209,10 +209,11 @@ static void retry_waiting_locked(grpc_exec_ctx *exec_ctx,
   holder->waiting_ops_count = 0;
   holder->waiting_ops_capacity = 0;
   GRPC_SUBCHANNEL_CALL_REF(a->call, "retry_ops");
-  grpc_exec_ctx_enqueue(exec_ctx, grpc_closure_create(retry_ops, a), 1);
+  grpc_exec_ctx_enqueue(exec_ctx, grpc_closure_create(retry_ops, a), true,
+                        NULL);
 }
 
-static void retry_ops(grpc_exec_ctx *exec_ctx, void *args, int success) {
+static void retry_ops(grpc_exec_ctx *exec_ctx, void *args, bool success) {
   retry_ops_args *a = args;
   size_t i;
   for (i = 0; i < a->nops; i++) {
@@ -240,9 +241,10 @@ static void fail_locked(grpc_exec_ctx *exec_ctx,
                         grpc_subchannel_call_holder *holder) {
   size_t i;
   for (i = 0; i < holder->waiting_ops_count; i++) {
-    grpc_exec_ctx_enqueue(exec_ctx, holder->waiting_ops[i].on_complete, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, holder->waiting_ops[i].on_complete, false,
+                          NULL);
     grpc_exec_ctx_enqueue(exec_ctx, holder->waiting_ops[i].recv_message_ready,
-                          0);
+                          false, NULL);
   }
   holder->waiting_ops_count = 0;
 }
diff --git a/src/core/client_config/lb_policies/pick_first.c b/src/core/client_config/lb_policies/pick_first.c
index e6ddb1a11f1fac5a5b6855fab5d381ae4a38d684..459bbebb68acd06b14d475b3d233a00edd3d3779 100644
--- a/src/core/client_config/lb_policies/pick_first.c
+++ b/src/core/client_config/lb_policies/pick_first.c
@@ -76,7 +76,7 @@ typedef struct {
 } pick_first_lb_policy;
 
 #define GET_SELECTED(p) \
-  ((grpc_connected_subchannel *)gpr_atm_no_barrier_load(&(p)->selected))
+  ((grpc_connected_subchannel *)gpr_atm_acq_load(&(p)->selected))
 
 void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
@@ -121,7 +121,7 @@ void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     *pp->target = NULL;
     grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
                                  pp->pollset);
-    grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, true, NULL);
     gpr_free(pp);
     pp = next;
   }
@@ -140,7 +140,7 @@ static void pf_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
       grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
                                    pp->pollset);
       *target = NULL;
-      grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, false, NULL);
       gpr_free(pp);
     } else {
       pp->next = p->pending_picks;
@@ -209,7 +209,7 @@ int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
 }
 
 static void destroy_subchannels(grpc_exec_ctx *exec_ctx, void *arg,
-                                int iomgr_success) {
+                                bool iomgr_success) {
   pick_first_lb_policy *p = arg;
   size_t i;
   size_t num_subchannels = p->num_subchannels;
@@ -230,7 +230,7 @@ static void destroy_subchannels(grpc_exec_ctx *exec_ctx, void *arg,
 }
 
 static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
-                                    int iomgr_success) {
+                                    bool iomgr_success) {
   pick_first_lb_policy *p = arg;
   grpc_subchannel *selected_subchannel;
   pending_pick *pp;
@@ -268,19 +268,19 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
         selected =
             grpc_subchannel_get_connected_subchannel(selected_subchannel);
         GPR_ASSERT(selected != NULL);
-        gpr_atm_no_barrier_store(&p->selected, (gpr_atm)selected);
         GRPC_CONNECTED_SUBCHANNEL_REF(selected, "picked_first");
         /* drop the pick list: we are connected now */
         GRPC_LB_POLICY_WEAK_REF(&p->base, "destroy_subchannels");
-        grpc_exec_ctx_enqueue(exec_ctx,
-                              grpc_closure_create(destroy_subchannels, p), 1);
+        gpr_atm_rel_store(&p->selected, (gpr_atm)selected);
+        grpc_exec_ctx_enqueue(
+            exec_ctx, grpc_closure_create(destroy_subchannels, p), true, NULL);
         /* update any calls that were waiting for a pick */
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
           *pp->target = selected;
           grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
                                        pp->pollset);
-          grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
+          grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, true, NULL);
           gpr_free(pp);
         }
         grpc_connected_subchannel_notify_on_state_change(
@@ -327,7 +327,7 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
           while ((pp = p->pending_picks)) {
             p->pending_picks = pp->next;
             *pp->target = NULL;
-            grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
+            grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, true, NULL);
             gpr_free(pp);
           }
           GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base,
@@ -374,7 +374,7 @@ void pf_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   if (selected) {
     grpc_connected_subchannel_ping(exec_ctx, selected, closure);
   } else {
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
   }
 }
 
diff --git a/src/core/client_config/lb_policies/round_robin.c b/src/core/client_config/lb_policies/round_robin.c
index d4874563639203dc4eb4abd2ce1d237a700422ec..b1171c45b007f2883ee758d11d78a5164630aaa3 100644
--- a/src/core/client_config/lb_policies/round_robin.c
+++ b/src/core/client_config/lb_policies/round_robin.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -237,7 +237,7 @@ void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   while ((pp = p->pending_picks)) {
     p->pending_picks = pp->next;
     *pp->target = NULL;
-    grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, false, NULL);
     gpr_free(pp);
   }
   grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
@@ -263,7 +263,7 @@ static void rr_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
       grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
                                    pp->pollset);
       *target = NULL;
-      grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, false, NULL);
       gpr_free(pp);
     } else {
       pp->next = p->pending_picks;
@@ -336,7 +336,7 @@ int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
 }
 
 static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
-                                    int iomgr_success) {
+                                    bool iomgr_success) {
   subchannel_data *sd = arg;
   round_robin_lb_policy *p = sd->policy;
   pending_pick *pp;
@@ -376,7 +376,7 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
           }
           grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
                                        pp->pollset);
-          grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
+          grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, true, NULL);
           gpr_free(pp);
         }
         grpc_subchannel_notify_on_state_change(
@@ -428,7 +428,7 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
           while ((pp = p->pending_picks)) {
             p->pending_picks = pp->next;
             *pp->target = NULL;
-            grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
+            grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, true, NULL);
             gpr_free(pp);
           }
         } else {
@@ -479,7 +479,7 @@ static void rr_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
     grpc_connected_subchannel_ping(exec_ctx, target, closure);
   } else {
     gpr_mu_unlock(&p->mu);
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
   }
 }
 
diff --git a/src/core/client_config/resolvers/dns_resolver.c b/src/core/client_config/resolvers/dns_resolver.c
index 28ca30b9463c9f24f85db022216ef6031fa4bdcf..376b6b3d7681e4e5e172935276be9b25a5d5a418 100644
--- a/src/core/client_config/resolvers/dns_resolver.c
+++ b/src/core/client_config/resolvers/dns_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -93,7 +93,7 @@ static void dns_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver) {
   gpr_mu_lock(&r->mu);
   if (r->next_completion != NULL) {
     *r->target_config = NULL;
-    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
     r->next_completion = NULL;
   }
   gpr_mu_unlock(&r->mu);
@@ -182,7 +182,7 @@ static void dns_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
     if (r->resolved_config) {
       grpc_client_config_ref(r->resolved_config);
     }
-    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
     r->next_completion = NULL;
     r->published_version = r->resolved_version;
   }
diff --git a/src/core/client_config/resolvers/sockaddr_resolver.c b/src/core/client_config/resolvers/sockaddr_resolver.c
index 6343259246dc2cdebf0a02a388634fc0e1f8f7fc..68910ad975b6ab5b93d7bd7444b07dd646fd55b9 100644
--- a/src/core/client_config/resolvers/sockaddr_resolver.c
+++ b/src/core/client_config/resolvers/sockaddr_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -98,7 +98,7 @@ static void sockaddr_shutdown(grpc_exec_ctx *exec_ctx,
   gpr_mu_lock(&r->mu);
   if (r->next_completion != NULL) {
     *r->target_config = NULL;
-    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
     r->next_completion = NULL;
   }
   gpr_mu_unlock(&r->mu);
@@ -153,7 +153,7 @@ static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "sockaddr");
     r->published = 1;
     *r->target_config = cfg;
-    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
     r->next_completion = NULL;
   }
 }
diff --git a/src/core/client_config/resolvers/zookeeper_resolver.c b/src/core/client_config/resolvers/zookeeper_resolver.c
index 4924ca77d679e9c364741c26cf0e65b57c4c1f99..166738e768e6e21e15a49489faf61315d6c28a2b 100644
--- a/src/core/client_config/resolvers/zookeeper_resolver.c
+++ b/src/core/client_config/resolvers/zookeeper_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -420,7 +420,7 @@ static void zookeeper_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
     if (r->resolved_config != NULL) {
       grpc_client_config_ref(r->resolved_config);
     }
-    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
     r->next_completion = NULL;
     r->published_version = r->resolved_version;
   }
diff --git a/src/core/client_config/subchannel.c b/src/core/client_config/subchannel.c
index 2992da8b79d0655582942f9f213b9c33079b8afc..0a996a1e8bc8b47ffe82da87bfd18f9c2b81d30c 100644
--- a/src/core/client_config/subchannel.c
+++ b/src/core/client_config/subchannel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -145,7 +145,7 @@ struct grpc_subchannel_call {
 
 static gpr_timespec compute_connect_deadline(grpc_subchannel *c);
 static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *subchannel,
-                                 int iomgr_success);
+                                 bool iomgr_success);
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
 #define REF_REASON reason
@@ -175,7 +175,7 @@ static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *subchannel,
  */
 
 static void connection_destroy(grpc_exec_ctx *exec_ctx, void *arg,
-                               int success) {
+                               bool success) {
   grpc_connected_subchannel *c = arg;
   grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CONNECTION(c));
   gpr_free(c);
@@ -198,7 +198,7 @@ void grpc_connected_subchannel_unref(grpc_exec_ctx *exec_ctx,
  */
 
 static void subchannel_destroy(grpc_exec_ctx *exec_ctx, void *arg,
-                               int success) {
+                               bool success) {
   grpc_subchannel *c = arg;
   gpr_free((void *)c->filters);
   grpc_channel_args_destroy(c->args);
@@ -268,7 +268,7 @@ void grpc_subchannel_weak_unref(grpc_exec_ctx *exec_ctx,
   old_refs = ref_mutate(c, -(gpr_atm)1, 1 REF_MUTATE_PURPOSE("WEAK_UNREF"));
   if (old_refs == 1) {
     grpc_exec_ctx_enqueue(exec_ctx, grpc_closure_create(subchannel_destroy, c),
-                          1);
+                          true, NULL);
   }
 }
 
@@ -284,9 +284,13 @@ grpc_subchannel *grpc_subchannel_create(grpc_connector *connector,
   c->connector = connector;
   grpc_connector_ref(c->connector);
   c->num_filters = args->filter_count;
-  c->filters = gpr_malloc(sizeof(grpc_channel_filter *) * c->num_filters);
-  memcpy((void *)c->filters, args->filters,
-         sizeof(grpc_channel_filter *) * c->num_filters);
+  if (c->num_filters > 0) {
+    c->filters = gpr_malloc(sizeof(grpc_channel_filter *) * c->num_filters);
+    memcpy((void *)c->filters, args->filters,
+           sizeof(grpc_channel_filter *) * c->num_filters);
+  } else {
+    c->filters = NULL;
+  }
   c->addr = gpr_malloc(args->addr_len);
   memcpy(c->addr, args->addr, args->addr_len);
   grpc_pollset_set_init(&c->pollset_set);
@@ -337,7 +341,7 @@ grpc_connectivity_state grpc_subchannel_check_connectivity(grpc_subchannel *c) {
 }
 
 static void on_external_state_watcher_done(grpc_exec_ctx *exec_ctx, void *arg,
-                                           int success) {
+                                           bool success) {
   external_state_watcher *w = arg;
   grpc_closure *follow_up = w->notify;
   if (w->pollset_set != NULL) {
@@ -409,7 +413,7 @@ void grpc_connected_subchannel_process_transport_op(
 }
 
 static void subchannel_on_child_state_changed(grpc_exec_ctx *exec_ctx, void *p,
-                                              int iomgr_success) {
+                                              bool iomgr_success) {
   state_watcher *sw = p;
   grpc_subchannel *c = sw->subchannel;
   gpr_mu *mu = &c->mu;
@@ -483,7 +487,9 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
   /* build final filter list */
   num_filters = c->num_filters + c->connecting_result.num_filters + 1;
   filters = gpr_malloc(sizeof(*filters) * num_filters);
-  memcpy((void *)filters, c->filters, sizeof(*filters) * c->num_filters);
+  if (c->num_filters > 0) {
+    memcpy((void *)filters, c->filters, sizeof(*filters) * c->num_filters);
+  }
   memcpy((void *)(filters + c->num_filters), c->connecting_result.filters,
          sizeof(*filters) * c->connecting_result.num_filters);
   filters[num_filters - 1] = &grpc_connected_channel_filter;
@@ -519,7 +525,12 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
   }
 
   /* publish */
-  GPR_ASSERT(gpr_atm_no_barrier_cas(&c->connected_subchannel, 0, (gpr_atm)con));
+  /* TODO(ctiller): this full barrier seems to clear up a TSAN failure.
+                    I'd have expected the rel_cas below to be enough, but
+                    seemingly it's not.
+                    Re-evaluate if we really need this. */
+  gpr_atm_full_barrier();
+  GPR_ASSERT(gpr_atm_rel_cas(&c->connected_subchannel, 0, (gpr_atm)con));
   c->connecting = 0;
 
   /* setup subchannel watching connected subchannel for changes; subchannel ref
@@ -583,7 +594,7 @@ static void update_reconnect_parameters(grpc_subchannel *c) {
       gpr_time_add(c->next_attempt, gpr_time_from_millis(jitter, GPR_TIMESPAN));
 }
 
-static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, int iomgr_success) {
+static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, bool iomgr_success) {
   grpc_subchannel *c = arg;
   gpr_mu_lock(&c->mu);
   c->have_alarm = 0;
@@ -600,7 +611,7 @@ static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, int iomgr_success) {
 }
 
 static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
-                                 int iomgr_success) {
+                                 bool iomgr_success) {
   grpc_subchannel *c = arg;
 
   if (c->connecting_result.transport != NULL) {
@@ -636,7 +647,7 @@ static gpr_timespec compute_connect_deadline(grpc_subchannel *c) {
  */
 
 static void subchannel_call_destroy(grpc_exec_ctx *exec_ctx, void *call,
-                                    int success) {
+                                    bool success) {
   grpc_subchannel_call *c = call;
   GPR_TIMER_BEGIN("grpc_subchannel_call_unref.destroy", 0);
   grpc_call_stack_destroy(exec_ctx, SUBCHANNEL_CALL_TO_CALL_STACK(c));
diff --git a/src/core/httpcli/httpcli.c b/src/core/httpcli/httpcli.c
index b5cd8d8d2acc88dacb92ec3a101c3c7bae205942..71237bb61406421b7240db0be4abb590667d13ba 100644
--- a/src/core/httpcli/httpcli.c
+++ b/src/core/httpcli/httpcli.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -114,13 +114,13 @@ static void finish(grpc_exec_ctx *exec_ctx, internal_request *req,
   gpr_free(req);
 }
 
-static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, int success);
+static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success);
 
 static void do_read(grpc_exec_ctx *exec_ctx, internal_request *req) {
   grpc_endpoint_read(exec_ctx, req->ep, &req->incoming, &req->on_read);
 }
 
-static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   internal_request *req = user_data;
   size_t i;
 
@@ -147,7 +147,7 @@ static void on_written(grpc_exec_ctx *exec_ctx, internal_request *req) {
   do_read(exec_ctx, req);
 }
 
-static void done_write(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void done_write(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   internal_request *req = arg;
   if (success) {
     on_written(exec_ctx, req);
@@ -175,7 +175,7 @@ static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
   start_write(exec_ctx, req);
 }
 
-static void on_connected(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void on_connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   internal_request *req = arg;
 
   if (!req->ep) {
diff --git a/src/core/iomgr/closure.c b/src/core/iomgr/closure.c
index 7646a88ac58fe5b1917b581e34c31959b89b9b59..3a96f7385f73b2c15eee0a03857b446292f3e326 100644
--- a/src/core/iomgr/closure.c
+++ b/src/core/iomgr/closure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,7 +43,7 @@ void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
 }
 
 void grpc_closure_list_add(grpc_closure_list *closure_list,
-                           grpc_closure *closure, int success) {
+                           grpc_closure *closure, bool success) {
   if (closure == NULL) return;
   closure->final_data = (success != 0);
   if (closure_list->head == NULL) {
@@ -54,7 +54,7 @@ void grpc_closure_list_add(grpc_closure_list *closure_list,
   closure_list->tail = closure;
 }
 
-int grpc_closure_list_empty(grpc_closure_list closure_list) {
+bool grpc_closure_list_empty(grpc_closure_list closure_list) {
   return closure_list.head == NULL;
 }
 
@@ -77,7 +77,7 @@ typedef struct {
   grpc_closure wrapper;
 } wrapped_closure;
 
-static void closure_wrapper(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void closure_wrapper(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   wrapped_closure *wc = arg;
   grpc_iomgr_cb_func cb = wc->cb;
   void *cb_arg = wc->cb_arg;
diff --git a/src/core/iomgr/closure.h b/src/core/iomgr/closure.h
index 98ef91e1db902e2beb1f0d0cc2ce546c0748d595..ea96c19c71b235c3980872eb2c54bdbac238b8e2 100644
--- a/src/core/iomgr/closure.h
+++ b/src/core/iomgr/closure.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,7 @@
 #define GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H
 
 #include <grpc/support/port_platform.h>
+#include <stdbool.h>
 
 struct grpc_closure;
 typedef struct grpc_closure grpc_closure;
@@ -54,7 +55,7 @@ typedef struct grpc_closure_list {
  * \param success An indication on the state of the iomgr. On false, cleanup
  * actions should be taken (eg, shutdown). */
 typedef void (*grpc_iomgr_cb_func)(grpc_exec_ctx *exec_ctx, void *arg,
-                                   int success);
+                                   bool success);
 
 /** A closure over a grpc_iomgr_cb_func. */
 struct grpc_closure {
@@ -83,13 +84,13 @@ grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg);
 /** add \a closure to the end of \a list and set \a closure's success to \a
  * success */
 void grpc_closure_list_add(grpc_closure_list *list, grpc_closure *closure,
-                           int success);
+                           bool success);
 
 /** append all closures from \a src to \a dst and empty \a src. */
 void grpc_closure_list_move(grpc_closure_list *src, grpc_closure_list *dst);
 
 /** return whether \a list is empty. */
-int grpc_closure_list_empty(grpc_closure_list list);
+bool grpc_closure_list_empty(grpc_closure_list list);
 
 /** return the next pointer for a queued closure list */
 grpc_closure *grpc_closure_next(grpc_closure *closure);
diff --git a/src/core/iomgr/exec_ctx.c b/src/core/iomgr/exec_ctx.c
index 6059a6031ccfb725afe9c7f05c7856362a129914..1fd79f6ebaccdb5a2703cb9fdce7b990150a2cbe 100644
--- a/src/core/iomgr/exec_ctx.c
+++ b/src/core/iomgr/exec_ctx.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,16 +37,16 @@
 
 #include "src/core/profiling/timers.h"
 
-int grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx) {
-  int did_something = 0;
+bool grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx) {
+  bool did_something = 0;
   GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
   while (!grpc_closure_list_empty(exec_ctx->closure_list)) {
     grpc_closure *c = exec_ctx->closure_list.head;
     exec_ctx->closure_list.head = exec_ctx->closure_list.tail = NULL;
     while (c != NULL) {
-      int success = (int)(c->final_data & 1);
+      bool success = (bool)(c->final_data & 1);
       grpc_closure *next = (grpc_closure *)(c->final_data & ~(uintptr_t)1);
-      did_something++;
+      did_something = true;
       GPR_TIMER_BEGIN("grpc_exec_ctx_flush.cb", 0);
       c->cb(exec_ctx, c->cb_arg, success);
       GPR_TIMER_END("grpc_exec_ctx_flush.cb", 0);
@@ -62,11 +62,15 @@ void grpc_exec_ctx_finish(grpc_exec_ctx *exec_ctx) {
 }
 
 void grpc_exec_ctx_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
-                           int success) {
+                           bool success,
+                           grpc_workqueue *offload_target_or_null) {
+  GPR_ASSERT(offload_target_or_null == NULL);
   grpc_closure_list_add(&exec_ctx->closure_list, closure, success);
 }
 
 void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
-                                grpc_closure_list *list) {
+                                grpc_closure_list *list,
+                                grpc_workqueue *offload_target_or_null) {
+  GPR_ASSERT(offload_target_or_null == NULL);
   grpc_closure_list_move(list, &exec_ctx->closure_list);
 }
diff --git a/src/core/iomgr/exec_ctx.h b/src/core/iomgr/exec_ctx.h
index 43df48809447f63eb0b2b2161518ba9af7323512..9a9b2e55fa7294758bd89151e003fbcfdbdbf539 100644
--- a/src/core/iomgr/exec_ctx.h
+++ b/src/core/iomgr/exec_ctx.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,22 +57,29 @@ struct grpc_exec_ctx {
   grpc_closure_list closure_list;
 };
 
+/** A workqueue represents a list of work to be executed asynchronously.
+    Forward declared here to avoid a circular dependency with workqueue.h. */
+struct grpc_workqueue;
+typedef struct grpc_workqueue grpc_workqueue;
+
 #define GRPC_EXEC_CTX_INIT \
   { GRPC_CLOSURE_LIST_INIT }
 
 /** Flush any work that has been enqueued onto this grpc_exec_ctx.
  *  Caller must guarantee that no interfering locks are held.
- *  Returns 1 if work was performed, 0 otherwise. */
-int grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx);
+ *  Returns true if work was performed, false otherwise. */
+bool grpc_exec_ctx_flush(grpc_exec_ctx *exec_ctx);
 /** Finish any pending work for a grpc_exec_ctx. Must be called before
  *  the instance is destroyed, or work may be lost. */
 void grpc_exec_ctx_finish(grpc_exec_ctx *exec_ctx);
 /** Add a closure to be executed at the next flush/finish point */
 void grpc_exec_ctx_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
-                           int success);
+                           bool success,
+                           grpc_workqueue *offload_target_or_null);
 /** Add a list of closures to be executed at the next flush/finish point.
  *  Leaves \a list empty. */
 void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
-                                grpc_closure_list *list);
+                                grpc_closure_list *list,
+                                grpc_workqueue *offload_target_or_null);
 
 #endif
diff --git a/src/core/iomgr/executor.c b/src/core/iomgr/executor.c
index 00c68f7828ba85e65f9f47678a01d485363fdae8..f22d8f30acf5c5bd9809dcb611ab944fd90ffc85 100644
--- a/src/core/iomgr/executor.c
+++ b/src/core/iomgr/executor.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -77,7 +77,7 @@ static void closure_exec_thread_func(void *ignored) {
       gpr_mu_unlock(&g_executor.mu);
       break;
     } else {
-      grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures);
+      grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures, NULL);
     }
     gpr_mu_unlock(&g_executor.mu);
     grpc_exec_ctx_flush(&exec_ctx);
@@ -112,7 +112,7 @@ static void maybe_spawn_locked() {
   g_executor.pending_join = 1;
 }
 
-void grpc_executor_enqueue(grpc_closure *closure, int success) {
+void grpc_executor_enqueue(grpc_closure *closure, bool success) {
   gpr_mu_lock(&g_executor.mu);
   if (g_executor.shutting_down == 0) {
     grpc_closure_list_add(&g_executor.closures, closure, success);
@@ -133,7 +133,7 @@ void grpc_executor_shutdown() {
    * list below because we aren't accepting new work */
 
   /* Execute pending callbacks, some may be performing cleanups */
-  grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures);
+  grpc_exec_ctx_enqueue_list(&exec_ctx, &g_executor.closures, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
   GPR_ASSERT(grpc_closure_list_empty(g_executor.closures));
   if (pending_join) {
diff --git a/src/core/iomgr/executor.h b/src/core/iomgr/executor.h
index 6da446ae9c6ba96b9ff25ccb1671a296bb061f36..aac057ddf5fb9699826261c2ad951a5c9c0b7861 100644
--- a/src/core/iomgr/executor.h
+++ b/src/core/iomgr/executor.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,7 +45,7 @@ void grpc_executor_init();
 
 /** Enqueue \a closure for its eventual execution of \a f(arg) on a separate
  * thread */
-void grpc_executor_enqueue(grpc_closure *closure, int success);
+void grpc_executor_enqueue(grpc_closure *closure, bool success);
 
 /** Shutdown the executor, running all pending work as part of the call */
 void grpc_executor_shutdown();
diff --git a/src/core/iomgr/fd_posix.c b/src/core/iomgr/fd_posix.c
index 89c938bc04844ad9e25e66675e4a2f346e53ca29..85eadd754b9fd8670f354aadd781f64350dac13c 100644
--- a/src/core/iomgr/fd_posix.c
+++ b/src/core/iomgr/fd_posix.c
@@ -218,7 +218,7 @@ static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   } else {
     grpc_remove_fd_from_all_epoll_sets(fd->fd);
   }
-  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
 }
 
 int grpc_fd_wrapped_fd(grpc_fd *fd) {
@@ -273,7 +273,7 @@ static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   } else if (*st == CLOSURE_READY) {
     /* already ready ==> queue the closure to run immediately */
     *st = CLOSURE_NOT_READY;
-    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
     maybe_wake_one_watcher_locked(fd);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
@@ -296,7 +296,7 @@ static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
     return 0;
   } else {
     /* waiting ==> queue closure */
-    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown);
+    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
     *st = CLOSURE_NOT_READY;
     return 1;
   }
diff --git a/src/core/iomgr/iocp_windows.c b/src/core/iomgr/iocp_windows.c
index d3868ce62cb67095d818c6bcfc48c798673c39e9..96b6f810248ac68cb38377539cd6223944e7c246 100644
--- a/src/core/iomgr/iocp_windows.c
+++ b/src/core/iomgr/iocp_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -67,7 +67,7 @@ static DWORD deadline_to_millis_timeout(gpr_timespec deadline,
     return 0;
   }
   timeout = gpr_time_sub(deadline, now);
-  return gpr_time_to_millis(gpr_time_add(
+  return (DWORD)gpr_time_to_millis(gpr_time_add(
       timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
 }
 
@@ -120,7 +120,7 @@ void grpc_iocp_work(grpc_exec_ctx *exec_ctx, gpr_timespec deadline) {
     info->has_pending_iocp = 1;
   }
   gpr_mu_unlock(&socket->state_mu);
-  grpc_exec_ctx_enqueue(exec_ctx, closure, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
 }
 
 void grpc_iocp_init(void) {
@@ -179,13 +179,11 @@ void grpc_iocp_add_socket(grpc_winsocket *socket) {
 static void socket_notify_on_iocp(grpc_exec_ctx *exec_ctx,
                                   grpc_winsocket *socket, grpc_closure *closure,
                                   grpc_winsocket_callback_info *info) {
-  int run_now = 0;
   GPR_ASSERT(info->closure == NULL);
   gpr_mu_lock(&socket->state_mu);
   if (info->has_pending_iocp) {
-    run_now = 1;
     info->has_pending_iocp = 0;
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
   } else {
     info->closure = closure;
   }
diff --git a/src/core/iomgr/pollset_multipoller_with_epoll.c b/src/core/iomgr/pollset_multipoller_with_epoll.c
index d117485327fde3c8a9c17d7ff65f82928ddd868b..4acae2bb7122ccefc755cbc9f34e62c97a2aabeb 100644
--- a/src/core/iomgr/pollset_multipoller_with_epoll.c
+++ b/src/core/iomgr/pollset_multipoller_with_epoll.c
@@ -141,7 +141,7 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 }
 
 static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
-                                int iomgr_status) {
+                                bool iomgr_status) {
   delayed_add *da = arg;
 
   if (!grpc_fd_is_orphaned(da->fd)) {
@@ -154,7 +154,7 @@ static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
     /* We don't care about this pollset anymore. */
     if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
       da->pollset->called_shutdown = 1;
-      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, 1);
+      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
     }
   }
   gpr_mu_unlock(&da->pollset->mu);
@@ -178,7 +178,7 @@ static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
     GRPC_FD_REF(fd, "delayed_add");
     grpc_closure_init(&da->closure, perform_delayed_add, da);
     pollset->in_flight_cbs++;
-    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
   }
 }
 
diff --git a/src/core/iomgr/pollset_posix.c b/src/core/iomgr/pollset_posix.c
index c325b634ae5ba80ca19c45faad6a46d57907b312..a8e2e22977753762bcd8cc05a2c371fffe0b16ec 100644
--- a/src/core/iomgr/pollset_posix.c
+++ b/src/core/iomgr/pollset_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -243,7 +243,7 @@ void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
   GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
   pollset->vtable->finish_shutdown(pollset);
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
 
 void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
@@ -271,7 +271,7 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   if (!grpc_pollset_has_workers(pollset) &&
       !grpc_closure_list_empty(pollset->idle_jobs)) {
     GPR_TIMER_MARK("grpc_pollset_work.idle_jobs", 0);
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs);
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
     goto done;
   }
   /* Check alarms - these are a global resource so we just ping
@@ -365,7 +365,7 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
        * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
       gpr_mu_lock(&pollset->mu);
     } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs);
+      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
       gpr_mu_unlock(&pollset->mu);
       grpc_exec_ctx_flush(exec_ctx);
       gpr_mu_lock(&pollset->mu);
@@ -381,7 +381,7 @@ void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   pollset->shutdown_done = closure;
   grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!grpc_pollset_has_workers(pollset)) {
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs);
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
   }
   if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
       !grpc_pollset_has_workers(pollset)) {
@@ -419,7 +419,8 @@ typedef struct grpc_unary_promote_args {
   grpc_closure promotion_closure;
 } grpc_unary_promote_args;
 
-static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args, int success) {
+static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
+                             bool success) {
   grpc_unary_promote_args *up_args = args;
   const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
   grpc_pollset *pollset = up_args->pollset;
diff --git a/src/core/iomgr/pollset_windows.c b/src/core/iomgr/pollset_windows.c
index deb661548d291a34b0f2123ca75e86544dfa543e..2e650ca939351f5269713a28cc65ebfc1a8bb37e 100644
--- a/src/core/iomgr/pollset_windows.c
+++ b/src/core/iomgr/pollset_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,15 +81,6 @@ static grpc_pollset_worker *pop_front_worker(
   }
 }
 
-static void push_back_worker(grpc_pollset_worker *root,
-                             grpc_pollset_worker_link_type type,
-                             grpc_pollset_worker *worker) {
-  worker->links[type].next = root;
-  worker->links[type].prev = worker->links[type].next->links[type].prev;
-  worker->links[type].prev->links[type].next =
-      worker->links[type].next->links[type].prev = worker;
-}
-
 static void push_front_worker(grpc_pollset_worker *root,
                               grpc_pollset_worker_link_type type,
                               grpc_pollset_worker *worker) {
@@ -116,7 +107,7 @@ void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   pollset->shutting_down = 1;
   grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset->is_iocp_worker) {
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
   } else {
     pollset->on_shutdown = closure;
   }
@@ -174,7 +165,7 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       }
 
       if (pollset->shutting_down && pollset->on_shutdown != NULL) {
-        grpc_exec_ctx_enqueue(exec_ctx, pollset->on_shutdown, 1);
+        grpc_exec_ctx_enqueue(exec_ctx, pollset->on_shutdown, true, NULL);
         pollset->on_shutdown = NULL;
       }
       goto done;
diff --git a/src/core/iomgr/resolve_address_posix.c b/src/core/iomgr/resolve_address_posix.c
index 555c74ce7e325bfecfd2300567ef176dc2fc136e..c51745b9187a0a4b04f3e7ef79bba795451bb7a6 100644
--- a/src/core/iomgr/resolve_address_posix.c
+++ b/src/core/iomgr/resolve_address_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -152,7 +152,7 @@ done:
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, int success) {
+static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {
   request *r = rp;
   grpc_resolved_addresses *resolved =
       grpc_blocking_resolve_address(r->name, r->default_port);
diff --git a/src/core/iomgr/resolve_address_windows.c b/src/core/iomgr/resolve_address_windows.c
index 007c855d1092a960686f126c49eed8037ccca7f6..28c8661e73b1738adf208488b603080d285477cf 100644
--- a/src/core/iomgr/resolve_address_windows.c
+++ b/src/core/iomgr/resolve_address_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -135,7 +135,7 @@ done:
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, int success) {
+static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {
   request *r = rp;
   grpc_resolved_addresses *resolved =
       grpc_blocking_resolve_address(r->name, r->default_port);
diff --git a/src/core/iomgr/sockaddr_win32.h b/src/core/iomgr/sockaddr_win32.h
index fe2be99145478f1c9653bed020a96a1792b7fe95..8e3946a7d847cec022d21882a1d5129406f49bef 100644
--- a/src/core/iomgr/sockaddr_win32.h
+++ b/src/core/iomgr/sockaddr_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,9 +38,4 @@
 #include <ws2tcpip.h>
 #include <mswsock.h>
 
-#ifdef __MINGW32__
-/* mingw seems to be missing that definition. */
-const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
-#endif
-
 #endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_WIN32_H */
diff --git a/src/core/iomgr/tcp_client_posix.c b/src/core/iomgr/tcp_client_posix.c
index d9d24ee9a36203f4faf25a567a53a28b4bf5ca35..c76c2e3b0f2cd7d836c0665523677ef293cf3db6 100644
--- a/src/core/iomgr/tcp_client_posix.c
+++ b/src/core/iomgr/tcp_client_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -91,7 +91,7 @@ error:
   return 0;
 }
 
-static void tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp, int success) {
+static void tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp, bool success) {
   int done;
   async_connect *ac = acp;
   if (grpc_tcp_trace) {
@@ -111,7 +111,7 @@ static void tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp, int success) {
   }
 }
 
-static void on_writable(grpc_exec_ctx *exec_ctx, void *acp, int success) {
+static void on_writable(grpc_exec_ctx *exec_ctx, void *acp, bool success) {
   async_connect *ac = acp;
   int so_error = 0;
   socklen_t so_error_size;
@@ -206,7 +206,7 @@ finish:
     gpr_free(ac->addr_str);
     gpr_free(ac);
   }
-  grpc_exec_ctx_enqueue(exec_ctx, closure, *ep != NULL);
+  grpc_exec_ctx_enqueue(exec_ctx, closure, *ep != NULL, NULL);
 }
 
 void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
@@ -243,7 +243,7 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
     addr_len = sizeof(addr4_copy);
   }
   if (!prepare_socket(addr, fd)) {
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
     return;
   }
 
@@ -259,14 +259,14 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
 
   if (err >= 0) {
     *ep = grpc_tcp_create(fdobj, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str);
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
     goto done;
   }
 
   if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
     gpr_log(GPR_ERROR, "connect error to '%s': %s", addr_str, strerror(errno));
     grpc_fd_orphan(exec_ctx, fdobj, NULL, NULL, "tcp_client_connect_error");
-    grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, false, NULL);
     goto done;
   }
 
diff --git a/src/core/iomgr/tcp_client_windows.c b/src/core/iomgr/tcp_client_windows.c
index e5691b7e12188f77611b007d062d69948a909210..689c6f7b104a8a363d3d13d6f5aba2835ae92c9f 100644
--- a/src/core/iomgr/tcp_client_windows.c
+++ b/src/core/iomgr/tcp_client_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -74,7 +74,7 @@ static void async_connect_unlock_and_cleanup(async_connect *ac) {
   }
 }
 
-static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, int occured) {
+static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, bool occured) {
   async_connect *ac = acp;
   gpr_mu_lock(&ac->mu);
   /* If the alarm didn't occur, it got cancelled. */
@@ -84,7 +84,7 @@ static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, int occured) {
   async_connect_unlock_and_cleanup(ac);
 }
 
-static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, int from_iocp) {
+static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, bool from_iocp) {
   async_connect *ac = acp;
   SOCKET sock = ac->socket->socket;
   grpc_endpoint **ep = ac->endpoint;
@@ -215,7 +215,7 @@ failure:
   } else if (sock != INVALID_SOCKET) {
     closesocket(sock);
   }
-  grpc_exec_ctx_enqueue(exec_ctx, on_done, 0);
+  grpc_exec_ctx_enqueue(exec_ctx, on_done, false, NULL);
 }
 
 #endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/iomgr/tcp_posix.c b/src/core/iomgr/tcp_posix.c
index 4fa8ca8c7112c0cccec7760d9740f1ac2b347f1b..048e90744121fdb1470df7a9a1b059d9ab97a152 100644
--- a/src/core/iomgr/tcp_posix.c
+++ b/src/core/iomgr/tcp_posix.c
@@ -100,9 +100,9 @@ typedef struct {
 } grpc_tcp;
 
 static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
-                            int success);
+                            bool success);
 static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
-                             int success);
+                             bool success);
 
 static void tcp_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   grpc_tcp *tcp = (grpc_tcp *)ep;
@@ -247,7 +247,7 @@ static void tcp_continue_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
 }
 
 static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
-                            int success) {
+                            bool success) {
   grpc_tcp *tcp = (grpc_tcp *)arg;
   GPR_ASSERT(!tcp->finished_edge);
 
@@ -273,7 +273,7 @@ static void tcp_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
     tcp->finished_edge = 0;
     grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure);
   } else {
-    grpc_exec_ctx_enqueue(exec_ctx, &tcp->read_closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &tcp->read_closure, true, NULL);
   }
 }
 
@@ -360,7 +360,7 @@ static flush_result tcp_flush(grpc_tcp *tcp) {
 }
 
 static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */,
-                             int success) {
+                             bool success) {
   grpc_tcp *tcp = (grpc_tcp *)arg;
   flush_result status;
   grpc_closure *cb;
@@ -407,7 +407,7 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 
   if (buf->length == 0) {
     GPR_TIMER_END("tcp_write", 0);
-    grpc_exec_ctx_enqueue(exec_ctx, cb, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, true, NULL);
     return;
   }
   tcp->outgoing_buffer = buf;
@@ -420,7 +420,7 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
     tcp->write_cb = cb;
     grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure);
   } else {
-    grpc_exec_ctx_enqueue(exec_ctx, cb, status == FLUSH_DONE);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, status == FLUSH_DONE, NULL);
   }
 
   GPR_TIMER_END("tcp_write", 0);
diff --git a/src/core/iomgr/tcp_server_posix.c b/src/core/iomgr/tcp_server_posix.c
index adf14aeb5979f53d125a3c1c2788db79b9b4e32e..5e07f8261c223e4cd410ab2deab9e34cb0d99c2b 100644
--- a/src/core/iomgr/tcp_server_posix.c
+++ b/src/core/iomgr/tcp_server_posix.c
@@ -160,7 +160,7 @@ grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete) {
 
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   if (s->shutdown_complete != NULL) {
-    grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, true, NULL);
   }
 
   gpr_mu_destroy(&s->mu);
@@ -174,7 +174,8 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server, int success) {
+static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server,
+                           bool success) {
   grpc_tcp_server *s = server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
@@ -317,7 +318,7 @@ error:
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_tcp_listener *sp = arg;
   grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index,
                                        sp->fd_index};
@@ -602,7 +603,7 @@ void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
     /* Complete shutdown_starting work before destroying. */
     grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
     gpr_mu_lock(&s->mu);
-    grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting);
+    grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting, NULL);
     gpr_mu_unlock(&s->mu);
     if (exec_ctx == NULL) {
       grpc_exec_ctx_flush(&local_exec_ctx);
diff --git a/src/core/iomgr/tcp_server_windows.c b/src/core/iomgr/tcp_server_windows.c
index 8ee8149f251e61fb145a764b464a1ca19b2b58c2..ce930b8f41d4e9f4d828478efedb7e05e8c91dc3 100644
--- a/src/core/iomgr/tcp_server_windows.c
+++ b/src/core/iomgr/tcp_server_windows.c
@@ -119,7 +119,7 @@ grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete) {
 
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   if (s->shutdown_complete != NULL) {
-    grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, true, NULL);
   }
 
   /* Now that the accepts have been aborted, we can destroy the sockets.
@@ -173,7 +173,7 @@ void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
     /* Complete shutdown_starting work before destroying. */
     grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
     gpr_mu_lock(&s->mu);
-    grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting);
+    grpc_exec_ctx_enqueue_list(&local_exec_ctx, &s->shutdown_starting, NULL);
     gpr_mu_unlock(&s->mu);
     if (exec_ctx == NULL) {
       grpc_exec_ctx_flush(&local_exec_ctx);
@@ -311,7 +311,7 @@ failure:
 }
 
 /* Event manager callback when reads are ready. */
-static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, int from_iocp) {
+static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, bool from_iocp) {
   grpc_tcp_listener *sp = arg;
   grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index, 0};
   SOCKET sock = sp->new_socket;
@@ -531,7 +531,7 @@ int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
   for (sp = s->head; sp && port_index != 0; sp = sp->next, --port_index)
     ;
   if (sp) {
-    return _open_osfhandle(sp->socket->socket, 0);
+    return _open_osfhandle((intptr_t)sp->socket->socket, 0);
   } else {
     return -1;
   }
diff --git a/src/core/iomgr/tcp_windows.c b/src/core/iomgr/tcp_windows.c
index cc7f7ff8d262d2511ae092ae32d3fa8eb249fd7a..038e4158c89b9fdd9ecfb8db6d000280fdacd6b0 100644
--- a/src/core/iomgr/tcp_windows.c
+++ b/src/core/iomgr/tcp_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -138,15 +138,12 @@ static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_read(grpc_exec_ctx *exec_ctx, void *tcpp, int success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *tcpp, bool success) {
   grpc_tcp *tcp = tcpp;
   grpc_closure *cb = tcp->read_cb;
   grpc_winsocket *socket = tcp->socket;
   gpr_slice sub;
-  gpr_slice *slice = NULL;
-  size_t nslices = 0;
   grpc_winsocket_callback_info *info = &socket->read_info;
-  int do_abort = 0;
 
   if (success) {
     if (socket->read_info.wsa_error != 0 && !tcp->shutting_down) {
@@ -187,7 +184,7 @@ static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   WSABUF buffer;
 
   if (tcp->shutting_down) {
-    grpc_exec_ctx_enqueue(exec_ctx, cb, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
     return;
   }
 
@@ -211,7 +208,7 @@ static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   /* Did we get data immediately ? Yay. */
   if (info->wsa_error != WSAEWOULDBLOCK) {
     info->bytes_transfered = bytes_read;
-    grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, true, NULL);
     return;
   }
 
@@ -224,7 +221,7 @@ static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
       info->wsa_error = wsa_error;
-      grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, &tcp->on_read, false, NULL);
       return;
     }
   }
@@ -233,12 +230,11 @@ static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 }
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_write(grpc_exec_ctx *exec_ctx, void *tcpp, int success) {
+static void on_write(grpc_exec_ctx *exec_ctx, void *tcpp, bool success) {
   grpc_tcp *tcp = (grpc_tcp *)tcpp;
   grpc_winsocket *handle = tcp->socket;
   grpc_winsocket_callback_info *info = &handle->write_info;
   grpc_closure *cb;
-  int do_abort = 0;
 
   gpr_mu_lock(&tcp->mu);
   cb = tcp->write_cb;
@@ -277,7 +273,7 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   size_t len;
 
   if (tcp->shutting_down) {
-    grpc_exec_ctx_enqueue(exec_ctx, cb, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
     return;
   }
 
@@ -305,9 +301,9 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
      connection that has its send queue filled up. But if we don't, then we can
      avoid doing an async write operation at all. */
   if (info->wsa_error != WSAEWOULDBLOCK) {
-    int ok = 0;
+    bool ok = false;
     if (status == 0) {
-      ok = 1;
+      ok = true;
       GPR_ASSERT(bytes_sent == tcp->write_slices->length);
     } else {
       if (socket->read_info.wsa_error != WSAECONNRESET) {
@@ -317,7 +313,7 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
       }
     }
     if (allocated) gpr_free(allocated);
-    grpc_exec_ctx_enqueue(exec_ctx, cb, ok);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, ok, NULL);
     return;
   }
 
@@ -334,7 +330,7 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
       TCP_UNREF(tcp, "write");
-      grpc_exec_ctx_enqueue(exec_ctx, cb, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
       return;
     }
   }
diff --git a/src/core/iomgr/timer.c b/src/core/iomgr/timer.c
index 24d6204e07b7f59f46254e450f9b5a93a4ca6fe7..a33d8f63a05bb1bf687407468d714b23a6de5fb1 100644
--- a/src/core/iomgr/timer.c
+++ b/src/core/iomgr/timer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -224,7 +224,7 @@ void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer) {
   shard_type *shard = &g_shards[shard_idx(timer)];
   gpr_mu_lock(&shard->mu);
   if (!timer->triggered) {
-    grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, false, NULL);
     timer->triggered = 1;
     if (timer->heap_index == INVALID_HEAP_INDEX) {
       list_remove(timer);
@@ -290,7 +290,7 @@ static size_t pop_timers(grpc_exec_ctx *exec_ctx, shard_type *shard,
   grpc_timer *timer;
   gpr_mu_lock(&shard->mu);
   while ((timer = pop_one(shard, now))) {
-    grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, success);
+    grpc_exec_ctx_enqueue(exec_ctx, &timer->closure, success, NULL);
     n++;
   }
   *new_min_deadline = compute_min_deadline(shard);
diff --git a/src/core/iomgr/udp_server.c b/src/core/iomgr/udp_server.c
index a1a6b04cadd6eb55b1b134e1b397b7f7fb00b970..fe006c603ca63a7e50dd1cf918b086f255752bc3 100644
--- a/src/core/iomgr/udp_server.c
+++ b/src/core/iomgr/udp_server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -425,15 +425,5 @@ void grpc_udp_server_start(grpc_exec_ctx *exec_ctx, grpc_udp_server *s,
   gpr_mu_unlock(&s->mu);
 }
 
-/* TODO(rjshade): Add a test for this method. */
-void grpc_udp_server_write(server_port *sp, const char *buffer, size_t buf_len,
-                           const struct sockaddr *peer_address) {
-  ssize_t rc;
-  rc = sendto(sp->fd, buffer, buf_len, 0, peer_address, sizeof(peer_address));
-  if (rc < 0) {
-    gpr_log(GPR_ERROR, "Unable to send data: %s", strerror(errno));
-  }
-}
-
 #endif
 #endif
diff --git a/src/core/iomgr/udp_server.h b/src/core/iomgr/udp_server.h
index de5736c426221ff5a7e909f29fb857b3cc2525a4..73a21c80ab46d990c4e34ade96cec51a088cec21 100644
--- a/src/core/iomgr/udp_server.h
+++ b/src/core/iomgr/udp_server.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -72,12 +72,4 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
 void grpc_udp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_udp_server *server,
                              grpc_closure *on_done);
 
-/* Write the contents of buffer to the underlying UDP socket. */
-/*
-void grpc_udp_server_write(grpc_udp_server *s,
-                           const char *buffer,
-                           int buf_len,
-                           const struct sockaddr* to);
-                           */
-
 #endif /* GRPC_INTERNAL_CORE_IOMGR_UDP_SERVER_H */
diff --git a/src/core/iomgr/workqueue.h b/src/core/iomgr/workqueue.h
index 714536233cfeb65b2c655cdcb1c5e6e1a1dab5ec..36dd133468328e6b533fdfb6c061b7f49662019f 100644
--- a/src/core/iomgr/workqueue.h
+++ b/src/core/iomgr/workqueue.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,9 +47,7 @@
 #include "src/core/iomgr/workqueue_windows.h"
 #endif
 
-/** A workqueue represents a list of work to be executed asynchronously. */
-struct grpc_workqueue;
-typedef struct grpc_workqueue grpc_workqueue;
+/* grpc_workqueue is forward declared in exec_ctx.h */
 
 /** Create a work queue */
 grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx);
diff --git a/src/core/iomgr/workqueue_posix.c b/src/core/iomgr/workqueue_posix.c
index d2a1c3461207db84962937c0bf7f8ba0d4fdc3b7..da11df67efba9e83f5ad221cb1abc292c2e789e5 100644
--- a/src/core/iomgr/workqueue_posix.c
+++ b/src/core/iomgr/workqueue_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,7 +45,7 @@
 
 #include "src/core/iomgr/fd_posix.h"
 
-static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, int success);
+static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success);
 
 grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx) {
   char name[32];
@@ -110,7 +110,7 @@ void grpc_workqueue_flush(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
   gpr_mu_unlock(&workqueue->mu);
 }
 
-static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_workqueue *workqueue = arg;
 
   if (!success) {
diff --git a/src/core/security/credentials.c b/src/core/security/credentials.c
index 8b56c576458bbabd7073e850937fde9f76dfefa2..afba0079f5617aeea23e98713362825735873a11 100644
--- a/src/core/security/credentials.c
+++ b/src/core/security/credentials.c
@@ -793,7 +793,7 @@ static void md_only_test_destruct(grpc_call_credentials *creds) {
 }
 
 static void on_simulated_token_fetch_done(grpc_exec_ctx *exec_ctx,
-                                          void *user_data, int success) {
+                                          void *user_data, bool success) {
   grpc_credentials_metadata_request *r =
       (grpc_credentials_metadata_request *)user_data;
   grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)r->creds;
@@ -812,7 +812,7 @@ static void md_only_test_get_request_metadata(
     grpc_credentials_metadata_request *cb_arg =
         grpc_credentials_metadata_request_create(creds, cb, user_data);
     grpc_executor_enqueue(
-        grpc_closure_create(on_simulated_token_fetch_done, cb_arg), 1);
+        grpc_closure_create(on_simulated_token_fetch_done, cb_arg), true);
   } else {
     cb(exec_ctx, user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK);
   }
diff --git a/src/core/security/google_default_credentials.c b/src/core/security/google_default_credentials.c
index 5385e41130f68ae4d71ea4cbdb0e86e0d3c14984..ae71107bef6a22e934e54e836f150bad43363160 100644
--- a/src/core/security/google_default_credentials.c
+++ b/src/core/security/google_default_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -86,7 +86,7 @@ static void on_compute_engine_detection_http_response(
   gpr_mu_unlock(GRPC_POLLSET_MU(&detector->pollset));
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int s) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool s) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/src/core/security/handshake.c b/src/core/security/handshake.c
index 364b76539658aaf04777bd04b125790da7d89614..a8b2fef6297035c3a998c7bebb4850cebbce84d3 100644
--- a/src/core/security/handshake.c
+++ b/src/core/security/handshake.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -61,10 +61,10 @@ typedef struct {
 } grpc_security_handshake;
 
 static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
-                                                 void *setup, int success);
+                                                 void *setup, bool success);
 
 static void on_handshake_data_sent_to_peer(grpc_exec_ctx *exec_ctx, void *setup,
-                                           int success);
+                                           bool success);
 
 static void security_connector_remove_handshake(grpc_security_handshake *h) {
   grpc_security_connector_handshake_list *node;
@@ -198,7 +198,8 @@ static void send_handshake_bytes_to_peer(grpc_exec_ctx *exec_ctx,
 }
 
 static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
-                                                 void *handshake, int success) {
+                                                 void *handshake,
+                                                 bool success) {
   grpc_security_handshake *h = handshake;
   size_t consumed_slice_size = 0;
   tsi_result result = TSI_OK;
@@ -265,7 +266,7 @@ static void on_handshake_data_received_from_peer(grpc_exec_ctx *exec_ctx,
 
 /* If handshake is NULL, the handshake is done. */
 static void on_handshake_data_sent_to_peer(grpc_exec_ctx *exec_ctx,
-                                           void *handshake, int success) {
+                                           void *handshake, bool success) {
   grpc_security_handshake *h = handshake;
 
   /* Make sure that write is OK. */
diff --git a/src/core/security/secure_endpoint.c b/src/core/security/secure_endpoint.c
index 9b87e268c60cf645f1b7d054d34c0bb085962c57..d11c43be203e51d6d2cc1e156ed82dc8d616bd9e 100644
--- a/src/core/security/secure_endpoint.c
+++ b/src/core/security/secure_endpoint.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -126,7 +126,7 @@ static void flush_read_staging_buffer(secure_endpoint *ep, uint8_t **cur,
 }
 
 static void call_read_cb(grpc_exec_ctx *exec_ctx, secure_endpoint *ep,
-                         int success) {
+                         bool success) {
   if (grpc_trace_secure_endpoint) {
     size_t i;
     for (i = 0; i < ep->read_buffer->count; i++) {
@@ -137,11 +137,11 @@ static void call_read_cb(grpc_exec_ctx *exec_ctx, secure_endpoint *ep,
     }
   }
   ep->read_buffer = NULL;
-  grpc_exec_ctx_enqueue(exec_ctx, ep->read_cb, success);
+  grpc_exec_ctx_enqueue(exec_ctx, ep->read_cb, success, NULL);
   SECURE_ENDPOINT_UNREF(exec_ctx, ep, "read");
 }
 
-static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   unsigned i;
   uint8_t keep_looping = 0;
   tsi_result result = TSI_OK;
@@ -315,7 +315,7 @@ static void endpoint_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *secure_ep,
   if (result != TSI_OK) {
     /* TODO(yangg) do different things according to the error type? */
     gpr_slice_buffer_reset_and_unref(&ep->output_buffer);
-    grpc_exec_ctx_enqueue(exec_ctx, cb, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, cb, false, NULL);
     return;
   }
 
diff --git a/src/core/security/server_auth_filter.c b/src/core/security/server_auth_filter.c
index d5c8c54369d6348e5d4c16674955073c3716a559..4c78711387e7734785004a65d78568644c8eb748 100644
--- a/src/core/security/server_auth_filter.c
+++ b/src/core/security/server_auth_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -153,7 +153,7 @@ static void on_md_processing_done(
 }
 
 static void auth_on_recv(grpc_exec_ctx *exec_ctx, void *user_data,
-                         int success) {
+                         bool success) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index 08713fceaf85a2d290d43b5b4846eb85872c74c6..ee3443c82856e75ab5544b02900be4e4ddb32e85 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -142,7 +142,7 @@ static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *statep,
                         on_accept, state);
 }
 
-static void destroy_done(grpc_exec_ctx *exec_ctx, void *statep, int success) {
+static void destroy_done(grpc_exec_ctx *exec_ctx, void *statep, bool success) {
   grpc_server_secure_state *state = statep;
   if (state->destroy_callback != NULL) {
     state->destroy_callback->cb(exec_ctx, state->destroy_callback->cb_arg,
diff --git a/src/core/support/env_win32.c b/src/core/support/env_win32.c
index 6b1ff102b04b16a98faecefd7a102e74b6c830f3..10258283bafe46703841205aa541e6ea9bcf7a72 100644
--- a/src/core/support/env_win32.c
+++ b/src/core/support/env_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,7 +38,12 @@
 #include "src/core/support/env.h"
 #include "src/core/support/string.h"
 
+#ifdef __MINGW32__
+errno_t getenv_s(size_t *size_needed, char *buffer, size_t size,
+                 const char *varname);
+#else
 #include <stdlib.h>
+#endif
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -47,14 +52,17 @@
 char *gpr_getenv(const char *name) {
   size_t size;
   char *result = NULL;
-  char *duplicated;
   errno_t err;
 
-  err = _dupenv_s(&result, &size, name);
-  if (err) return NULL;
-  duplicated = gpr_strdup(result);
-  free(result);
-  return duplicated;
+  err = getenv_s(&size, NULL, 0, name);
+  if (err || (size == 0)) return NULL;
+  result = gpr_malloc(size);
+  err = getenv_s(&size, result, size, name);
+  if (err) {
+    gpr_free(result);
+    return NULL;
+  }
+  return result;
 }
 
 void gpr_setenv(const char *name, const char *value) {
diff --git a/src/core/support/log_win32.c b/src/core/support/log_win32.c
index 40adcd1b501fbda9978fab12f95b12c9fcb8001c..e18e667fe5f567578fe22399a0930105041b666e 100644
--- a/src/core/support/log_win32.c
+++ b/src/core/support/log_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -109,13 +109,13 @@ void gpr_default_log(gpr_log_func_args *args) {
   fflush(stderr);
 }
 
-char *gpr_format_message(DWORD messageid) {
+char *gpr_format_message(int messageid) {
   LPTSTR tmessage;
   char *message;
   DWORD status = FormatMessage(
       FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
           FORMAT_MESSAGE_IGNORE_INSERTS,
-      NULL, messageid, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+      NULL, (DWORD)messageid, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
       (LPTSTR)(&tmessage), 0, NULL);
   if (status == 0) return gpr_strdup("Unable to retrieve error string");
   message = gpr_tchar_to_char(tmessage);
diff --git a/src/core/support/string_win32.c b/src/core/support/string_win32.c
index 914ba8771c4515542102fa0ee3596239d7c21232..3b1f702cf1bdd290e72703234635f0d5c3263349 100644
--- a/src/core/support/string_win32.c
+++ b/src/core/support/string_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -85,8 +85,8 @@ LPTSTR
 gpr_char_to_tchar(LPCSTR input) {
   LPTSTR ret;
   int needed = MultiByteToWideChar(CP_UTF8, 0, input, -1, NULL, 0);
-  if (needed == 0) return NULL;
-  ret = gpr_malloc(needed * sizeof(TCHAR));
+  if (needed <= 0) return NULL;
+  ret = gpr_malloc((unsigned)needed * sizeof(TCHAR));
   MultiByteToWideChar(CP_UTF8, 0, input, -1, ret, needed);
   return ret;
 }
@@ -95,8 +95,8 @@ LPSTR
 gpr_tchar_to_char(LPCTSTR input) {
   LPSTR ret;
   int needed = WideCharToMultiByte(CP_UTF8, 0, input, -1, NULL, 0, NULL, NULL);
-  if (needed == 0) return NULL;
-  ret = gpr_malloc(needed);
+  if (needed <= 0) return NULL;
+  ret = gpr_malloc((unsigned)needed);
   WideCharToMultiByte(CP_UTF8, 0, input, -1, ret, needed, NULL, NULL);
   return ret;
 }
diff --git a/src/core/support/sync_win32.c b/src/core/support/sync_win32.c
index 51a082b29ef95f319c33cedd395bde4d00d62984..84d412a75f0de5f09d9a510a7f77a6396f686e88 100644
--- a/src/core/support/sync_win32.c
+++ b/src/core/support/sync_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -94,7 +94,11 @@ int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline) {
     if (now_ms >= deadline_ms) {
       timeout = 1;
     } else {
-      timeout_max_ms = (DWORD)min(deadline_ms - now_ms, INFINITE - 1);
+      if ((deadline_ms - now_ms) >= INFINITE) {
+        timeout_max_ms = INFINITE - 1;
+      } else {
+        timeout_max_ms = (DWORD)(deadline_ms - now_ms);
+      }
       timeout = (SleepConditionVariableCS(cv, &mu->cs, timeout_max_ms) == 0 &&
                  GetLastError() == ERROR_TIMEOUT);
     }
diff --git a/src/core/support/time_win32.c b/src/core/support/time_win32.c
index 2bed0f6a9c43bd6a4c2a2cad95d1c7b90c05bef0..8af957e6f4f4cfd754147d35d167c3ac3290cfea 100644
--- a/src/core/support/time_win32.c
+++ b/src/core/support/time_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,9 +37,12 @@
 
 #ifdef GPR_WIN32
 
+#include <grpc/support/log.h>
 #include <grpc/support/time.h>
 #include <src/core/support/time_precise.h>
 #include <sys/timeb.h>
+#include <process.h>
+#include <limits.h>
 
 #include "src/core/support/block_annotate.h"
 
@@ -50,11 +53,12 @@ void gpr_time_init(void) {
   LARGE_INTEGER frequency;
   QueryPerformanceFrequency(&frequency);
   QueryPerformanceCounter(&g_start_time);
-  g_time_scale = 1.0 / frequency.QuadPart;
+  g_time_scale = 1.0 / (double)frequency.QuadPart;
 }
 
 gpr_timespec gpr_now(gpr_clock_type clock) {
   gpr_timespec now_tv;
+  LONGLONG diff;
   struct _timeb now_tb;
   LARGE_INTEGER timestamp;
   double now_dbl;
@@ -68,10 +72,14 @@ gpr_timespec gpr_now(gpr_clock_type clock) {
     case GPR_CLOCK_MONOTONIC:
     case GPR_CLOCK_PRECISE:
       QueryPerformanceCounter(&timestamp);
-      now_dbl = (timestamp.QuadPart - g_start_time.QuadPart) * g_time_scale;
+      diff = timestamp.QuadPart - g_start_time.QuadPart;
+      now_dbl = (double)diff * g_time_scale;
       now_tv.tv_sec = (int64_t)now_dbl;
       now_tv.tv_nsec = (int32_t)((now_dbl - (double)now_tv.tv_sec) * 1e9);
       break;
+    case GPR_TIMESPAN:
+      abort();
+      break;
   }
   return now_tv;
 }
@@ -79,7 +87,7 @@ gpr_timespec gpr_now(gpr_clock_type clock) {
 void gpr_sleep_until(gpr_timespec until) {
   gpr_timespec now;
   gpr_timespec delta;
-  DWORD sleep_millis;
+  int64_t sleep_millis;
 
   for (;;) {
     /* We could simplify by using clock_nanosleep instead, but it might be
@@ -91,9 +99,10 @@ void gpr_sleep_until(gpr_timespec until) {
 
     delta = gpr_time_sub(until, now);
     sleep_millis =
-        (DWORD)delta.tv_sec * GPR_MS_PER_SEC + delta.tv_nsec / GPR_NS_PER_MS;
+        delta.tv_sec * GPR_MS_PER_SEC + delta.tv_nsec / GPR_NS_PER_MS;
+    GPR_ASSERT((sleep_millis >= 0) && (sleep_millis <= INT_MAX));
     GRPC_SCHEDULING_START_BLOCKING_REGION;
-    Sleep(sleep_millis);
+    Sleep((DWORD)sleep_millis);
     GRPC_SCHEDULING_END_BLOCKING_REGION;
   }
 }
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index 880666bb386a567976e7bda0ffd5190ce32e7e22..9495e748b5f9dfd7b347b5dbb1a1d214c123c642 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -229,9 +229,9 @@ static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
                                           grpc_status_code status,
                                           const char *description);
 static void destroy_call(grpc_exec_ctx *exec_ctx, void *call_stack,
-                         int success);
+                         bool success);
 static void receiving_slice_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
-                                  int success);
+                                  bool success);
 
 grpc_call *grpc_call_create(grpc_channel *channel, grpc_call *parent_call,
                             uint32_t propagation_mask,
@@ -351,7 +351,7 @@ void grpc_call_internal_unref(grpc_exec_ctx *exec_ctx, grpc_call *c REF_ARG) {
   GRPC_CALL_STACK_UNREF(exec_ctx, CALL_STACK_FROM_CALL(c), REF_REASON);
 }
 
-static void destroy_call(grpc_exec_ctx *exec_ctx, void *call, int success) {
+static void destroy_call(grpc_exec_ctx *exec_ctx, void *call, bool success) {
   size_t i;
   int ii;
   grpc_call *c = call;
@@ -688,13 +688,13 @@ typedef struct cancel_closure {
   grpc_status_code status;
 } cancel_closure;
 
-static void done_cancel(grpc_exec_ctx *exec_ctx, void *ccp, int success) {
+static void done_cancel(grpc_exec_ctx *exec_ctx, void *ccp, bool success) {
   cancel_closure *cc = ccp;
   GRPC_CALL_INTERNAL_UNREF(exec_ctx, cc->call, "cancel");
   gpr_free(cc);
 }
 
-static void send_cancel(grpc_exec_ctx *exec_ctx, void *ccp, int success) {
+static void send_cancel(grpc_exec_ctx *exec_ctx, void *ccp, bool success) {
   grpc_transport_stream_op op;
   cancel_closure *cc = ccp;
   memset(&op, 0, sizeof(op));
@@ -721,7 +721,7 @@ static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
   cc->call = c;
   cc->status = status;
   GRPC_CALL_INTERNAL_REF(c, "cancel");
-  grpc_exec_ctx_enqueue(exec_ctx, &cc->closure, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, &cc->closure, true, NULL);
 
   return GRPC_CALL_OK;
 }
@@ -757,7 +757,7 @@ grpc_call *grpc_call_from_top_element(grpc_call_element *elem) {
   return CALL_FROM_TOP_ELEM(elem);
 }
 
-static void call_alarm(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void call_alarm(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_call *call = arg;
   gpr_mu_lock(&call->mu);
   call->have_alarm = 0;
@@ -934,7 +934,7 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx,
                                   batch_control *bctl) {
   grpc_call *call = bctl->call;
   if (bctl->is_notify_tag_closure) {
-    grpc_exec_ctx_enqueue(exec_ctx, bctl->notify_tag, bctl->success);
+    grpc_exec_ctx_enqueue(exec_ctx, bctl->notify_tag, bctl->success, NULL);
     gpr_mu_lock(&call->mu);
     bctl->call->used_batches =
         (uint8_t)(bctl->call->used_batches &
@@ -974,7 +974,7 @@ static void continue_receiving_slices(grpc_exec_ctx *exec_ctx,
 }
 
 static void receiving_slice_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
-                                  int success) {
+                                  bool success) {
   batch_control *bctl = bctlp;
   grpc_call *call = bctl->call;
 
@@ -993,7 +993,7 @@ static void receiving_slice_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
   }
 }
 
-static void finish_batch(grpc_exec_ctx *exec_ctx, void *bctlp, int success) {
+static void finish_batch(grpc_exec_ctx *exec_ctx, void *bctlp, bool success) {
   batch_control *bctl = bctlp;
   grpc_call *call = bctl->call;
   grpc_call *child_call;
@@ -1066,7 +1066,7 @@ static void finish_batch(grpc_exec_ctx *exec_ctx, void *bctlp, int success) {
 }
 
 static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
-                                   int success) {
+                                   bool success) {
   batch_control *bctl = bctlp;
   grpc_call *call = bctl->call;
 
diff --git a/src/core/surface/channel.c b/src/core/surface/channel.c
index 001692376fad1d7ec9ac69c65c9755a3d978e805..12d8ebceb9045f08f76ba8e424ecdc611eee1782 100644
--- a/src/core/surface/channel.c
+++ b/src/core/surface/channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -80,7 +80,7 @@ struct grpc_channel {
 /* the protobuf library will (by default) start warning at 100megs */
 #define DEFAULT_MAX_MESSAGE_LENGTH (100 * 1024 * 1024)
 
-static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg, int success);
+static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg, bool success);
 
 grpc_channel *grpc_channel_create_from_filters(
     grpc_exec_ctx *exec_ctx, const char *target,
@@ -268,7 +268,7 @@ void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx,
 }
 
 static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg,
-                            int iomgr_success) {
+                            bool iomgr_success) {
   grpc_channel *channel = arg;
   grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(channel));
   while (channel->registered_calls) {
diff --git a/src/core/surface/channel_connectivity.c b/src/core/surface/channel_connectivity.c
index 10f5c4da4d5c8b378b5e6b5ef786d10476073520..2dd4fce26b29050f46ba7b531516a87807c9201d 100644
--- a/src/core/surface/channel_connectivity.c
+++ b/src/core/surface/channel_connectivity.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -165,11 +165,11 @@ static void partly_done(grpc_exec_ctx *exec_ctx, state_watcher *w,
   }
 }
 
-static void watch_complete(grpc_exec_ctx *exec_ctx, void *pw, int success) {
+static void watch_complete(grpc_exec_ctx *exec_ctx, void *pw, bool success) {
   partly_done(exec_ctx, pw, 1);
 }
 
-static void timeout_complete(grpc_exec_ctx *exec_ctx, void *pw, int success) {
+static void timeout_complete(grpc_exec_ctx *exec_ctx, void *pw, bool success) {
   partly_done(exec_ctx, pw, 0);
 }
 
diff --git a/src/core/surface/channel_create.c b/src/core/surface/channel_create.c
index 49083f0870204a020be8c513990ad931eb0bc397..4d4337d28890055073121df247dcb8019f627e23 100644
--- a/src/core/surface/channel_create.c
+++ b/src/core/surface/channel_create.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -80,11 +80,11 @@ static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
 }
 
 static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
-                                           int success) {
+                                           bool success) {
   connector_unref(exec_ctx, arg);
 }
 
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   connector *c = arg;
   grpc_closure *notify;
   grpc_endpoint *tcp = c->tcp;
diff --git a/src/core/surface/channel_ping.c b/src/core/surface/channel_ping.c
index b4ce282787bb018f1670da78498e24a2de62d796..983f1c8a66d7f29db84d9d59d0f6ec929cd822de 100644
--- a/src/core/surface/channel_ping.c
+++ b/src/core/surface/channel_ping.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -53,7 +53,7 @@ static void ping_destroy(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_free(arg);
 }
 
-static void ping_done(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void ping_done(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   ping_result *pr = arg;
   grpc_cq_end_op(exec_ctx, pr->cq, pr->tag, success, ping_destroy, pr,
                  &pr->completion_storage);
diff --git a/src/core/surface/completion_queue.c b/src/core/surface/completion_queue.c
index c0db9c508a471a7f4cd2aa6510b0acb072bc4d21..75298eb795c4fb9d9d995ad6a4b43bb9f2b86ffc 100644
--- a/src/core/surface/completion_queue.c
+++ b/src/core/surface/completion_queue.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -86,7 +86,7 @@ static gpr_mu g_freelist_mu;
 grpc_completion_queue *g_freelist;
 
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *cc,
-                                     int success);
+                                     bool success);
 
 void grpc_cq_global_init(void) { gpr_mu_init(&g_freelist_mu); }
 
@@ -169,7 +169,7 @@ void grpc_cq_internal_ref(grpc_completion_queue *cc) {
 }
 
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *arg,
-                                     int success) {
+                                     bool success) {
   grpc_completion_queue *cc = arg;
   GRPC_CQ_INTERNAL_UNREF(cc, "pollset_destroy");
 }
diff --git a/src/core/surface/lame_client.c b/src/core/surface/lame_client.c
index a60e9d20dae7a0c043016f7d7f70f736e78e1b16..705996cad35259e3998528adb746414d71da10cf 100644
--- a/src/core/surface/lame_client.c
+++ b/src/core/surface/lame_client.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -78,8 +78,8 @@ static void lame_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
   } else if (op->recv_trailing_metadata != NULL) {
     fill_metadata(elem, op->recv_trailing_metadata);
   }
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, 0);
-  grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, 0);
+  grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, false, NULL);
+  grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, false, NULL);
 }
 
 static char *lame_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
diff --git a/src/core/surface/secure_channel_create.c b/src/core/surface/secure_channel_create.c
index 552a570713d4c4350f58be74eb634a0af198daee..dd1441ad67a73760ef0e6e1c6f1ab8b71003304f 100644
--- a/src/core/surface/secure_channel_create.c
+++ b/src/core/surface/secure_channel_create.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -128,14 +128,14 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
 }
 
 static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
-                                           int success) {
+                                           bool success) {
   connector *c = arg;
   grpc_security_connector_do_handshake(exec_ctx, &c->security_connector->base,
                                        c->connecting_endpoint,
                                        on_secure_handshake_done, c);
 }
 
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   connector *c = arg;
   grpc_closure *notify;
   grpc_endpoint *tcp = c->newly_connecting_endpoint;
diff --git a/src/core/surface/server.c b/src/core/surface/server.c
index 79db13810aa97b37686a708cfaa844a4ab302c62..42cffccb4c9e00d975617aa12631a2501e0926a3 100644
--- a/src/core/surface/server.c
+++ b/src/core/surface/server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -260,7 +260,7 @@ struct shutdown_cleanup_args {
 };
 
 static void shutdown_cleanup(grpc_exec_ctx *exec_ctx, void *arg,
-                             int iomgr_status_ignored) {
+                             bool iomgr_status_ignored) {
   struct shutdown_cleanup_args *a = arg;
   gpr_slice_unref(a->slice);
   gpr_free(a);
@@ -313,7 +313,7 @@ static void request_matcher_destroy(request_matcher *rm) {
   gpr_stack_lockfree_destroy(rm->requests);
 }
 
-static void kill_zombie(grpc_exec_ctx *exec_ctx, void *elem, int success) {
+static void kill_zombie(grpc_exec_ctx *exec_ctx, void *elem, bool success) {
   grpc_call_destroy(grpc_call_from_top_element(elem));
 }
 
@@ -328,7 +328,7 @@ static void request_matcher_zombify_all_pending_calls(grpc_exec_ctx *exec_ctx,
     grpc_closure_init(
         &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0));
-    grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, true, NULL);
   }
 }
 
@@ -392,7 +392,7 @@ static void orphan_channel(channel_data *chand) {
 }
 
 static void finish_destroy_channel(grpc_exec_ctx *exec_ctx, void *cd,
-                                   int success) {
+                                   bool success) {
   channel_data *chand = cd;
   grpc_server *server = chand->server;
   GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "server");
@@ -407,7 +407,8 @@ static void destroy_channel(grpc_exec_ctx *exec_ctx, channel_data *chand) {
   maybe_finish_shutdown(exec_ctx, chand->server);
   chand->finish_destroy_channel_closure.cb = finish_destroy_channel;
   chand->finish_destroy_channel_closure.cb_arg = chand;
-  grpc_exec_ctx_enqueue(exec_ctx, &chand->finish_destroy_channel_closure, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, &chand->finish_destroy_channel_closure, true,
+                        NULL);
 }
 
 static void finish_start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_server *server,
@@ -420,7 +421,7 @@ static void finish_start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_server *server,
     calld->state = ZOMBIED;
     gpr_mu_unlock(&calld->mu_state);
     grpc_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
-    grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, true, NULL);
     return;
   }
 
@@ -569,7 +570,7 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
 }
 
 static void server_on_recv_initial_metadata(grpc_exec_ctx *exec_ctx, void *ptr,
-                                            int success) {
+                                            bool success) {
   grpc_call_element *elem = ptr;
   call_data *calld = elem->call_data;
   gpr_timespec op_deadline;
@@ -609,7 +610,7 @@ static void server_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
 }
 
 static void got_initial_metadata(grpc_exec_ctx *exec_ctx, void *ptr,
-                                 int success) {
+                                 bool success) {
   grpc_call_element *elem = ptr;
   call_data *calld = elem->call_data;
   if (success) {
@@ -620,7 +621,7 @@ static void got_initial_metadata(grpc_exec_ctx *exec_ctx, void *ptr,
       calld->state = ZOMBIED;
       gpr_mu_unlock(&calld->mu_state);
       grpc_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
-      grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, 1);
+      grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, true, NULL);
     } else if (calld->state == PENDING) {
       calld->state = ZOMBIED;
       gpr_mu_unlock(&calld->mu_state);
@@ -653,7 +654,7 @@ static void accept_stream(grpc_exec_ctx *exec_ctx, void *cd,
 }
 
 static void channel_connectivity_changed(grpc_exec_ctx *exec_ctx, void *cd,
-                                         int iomgr_status_ignored) {
+                                         bool iomgr_status_ignored) {
   channel_data *chand = cd;
   grpc_server *server = chand->server;
   if (chand->connectivity_state != GRPC_CHANNEL_FATAL_FAILURE) {
@@ -779,9 +780,7 @@ grpc_server *grpc_server_create_from_filters(
     const grpc_channel_filter **filters, size_t filter_count,
     const grpc_channel_args *args) {
   size_t i;
-  /* TODO(census): restore this once we finalize census filter etc.
-     int census_enabled = grpc_channel_args_is_census_enabled(args); */
-  int census_enabled = 0;
+  int census_enabled = grpc_channel_args_is_census_enabled(args);
 
   grpc_server *server = gpr_malloc(sizeof(grpc_server));
 
@@ -987,7 +986,7 @@ void done_published_shutdown(grpc_exec_ctx *exec_ctx, void *done_arg,
 }
 
 static void listener_destroy_done(grpc_exec_ctx *exec_ctx, void *s,
-                                  int success) {
+                                  bool success) {
   grpc_server *server = s;
   gpr_mu_lock(&server->mu_global);
   server->listeners_destroyed++;
@@ -1142,7 +1141,8 @@ static grpc_call_error queue_call_request(grpc_exec_ctx *exec_ctx,
         grpc_closure_init(
             &calld->kill_zombie_closure, kill_zombie,
             grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0));
-        grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, 1);
+        grpc_exec_ctx_enqueue(exec_ctx, &calld->kill_zombie_closure, true,
+                              NULL);
       } else {
         GPR_ASSERT(calld->state == PENDING);
         calld->state = ACTIVATED;
@@ -1231,7 +1231,7 @@ done:
 }
 
 static void publish_registered_or_batch(grpc_exec_ctx *exec_ctx,
-                                        void *user_data, int success);
+                                        void *user_data, bool success);
 
 static void cpstr(char **dest, size_t *capacity, grpc_mdstr *value) {
   gpr_slice slice = value->slice;
@@ -1317,7 +1317,7 @@ static void fail_call(grpc_exec_ctx *exec_ctx, grpc_server *server,
 }
 
 static void publish_registered_or_batch(grpc_exec_ctx *exec_ctx, void *prc,
-                                        int success) {
+                                        bool success) {
   requested_call *rc = prc;
   grpc_call *call = *rc->call;
   grpc_call_element *elem =
diff --git a/src/core/surface/server_chttp2.c b/src/core/surface/server_chttp2.c
index 6e21d2dcd77bd7a93cf2077babbc2b41738165a4..ce970dfe7370ebd3a3c73a0494045e491aa5caf0 100644
--- a/src/core/surface/server_chttp2.c
+++ b/src/core/surface/server_chttp2.c
@@ -82,7 +82,7 @@ static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
                     grpc_closure *destroy_done) {
   grpc_tcp_server *tcp = tcpp;
   grpc_tcp_server_unref(exec_ctx, tcp);
-  grpc_exec_ctx_enqueue(exec_ctx, destroy_done, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, destroy_done, true, NULL);
 }
 
 int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr) {
diff --git a/src/core/surface/server_create.c b/src/core/surface/server_create.c
index f30093e06b9b5201eecc5da5e683eac345909077..5e37e80948e4b05032789ff006e8acd2a4fede68 100644
--- a/src/core/surface/server_create.c
+++ b/src/core/surface/server_create.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,9 +43,6 @@ grpc_server *grpc_server_create(const grpc_channel_args *args, void *reserved) {
   const grpc_channel_filter *filters[3];
   size_t num_filters = 0;
   filters[num_filters++] = &grpc_compress_filter;
-  if (grpc_channel_args_is_census_enabled(args)) {
-    filters[num_filters++] = &grpc_server_census_filter;
-  }
   GRPC_API_TRACE("grpc_server_create(%p, %p)", 2, (args, reserved));
   return grpc_server_create_from_filters(filters, num_filters, args);
 }
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index 2d99a1ee3e489e19672a57a958c01c98e7e0a915..c611496e7e5793731052805c21f82d0995b119d9 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -492,7 +492,7 @@ void grpc_chttp2_perform_writes(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing,
     grpc_endpoint *endpoint);
 void grpc_chttp2_terminate_writing(grpc_exec_ctx *exec_ctx,
-                                   void *transport_writing, int success);
+                                   void *transport_writing, bool success);
 void grpc_chttp2_cleanup_writing(grpc_exec_ctx *exec_ctx,
                                  grpc_chttp2_transport_global *global,
                                  grpc_chttp2_transport_writing *writing);
diff --git a/src/core/transport/chttp2/writing.c b/src/core/transport/chttp2/writing.c
index 669fae8b842e32e199a9eb8569170dfda7ed5f26..095883c66da92e8266068ed282f612a050daeff7 100644
--- a/src/core/transport/chttp2/writing.c
+++ b/src/core/transport/chttp2/writing.c
@@ -188,7 +188,7 @@ void grpc_chttp2_perform_writes(
     grpc_endpoint_write(exec_ctx, endpoint, &transport_writing->outbuf,
                         &transport_writing->done_cb);
   } else {
-    grpc_exec_ctx_enqueue(exec_ctx, &transport_writing->done_cb, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &transport_writing->done_cb, true, NULL);
   }
 }
 
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 05b25fd8b01f526282783d1fbc31b11ce2d5bf4c..9298573c7f4c56498c21f34ed9879674681009f8 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -86,14 +86,14 @@ static void unlock(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t);
 
 /* forward declarations of various callbacks that we'll build closures around */
 static void writing_action(grpc_exec_ctx *exec_ctx, void *t,
-                           int iomgr_success_ignored);
+                           bool iomgr_success_ignored);
 
 /** Set a transport level setting, and push it to our peer */
 static void push_setting(grpc_chttp2_transport *t, grpc_chttp2_setting_id id,
                          uint32_t value);
 
 /** Endpoint callback to process incoming data */
-static void recv_data(grpc_exec_ctx *exec_ctx, void *tp, int success);
+static void recv_data(grpc_exec_ctx *exec_ctx, void *tp, bool success);
 
 /** Start disconnection chain */
 static void drop_connection(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t);
@@ -183,7 +183,7 @@ static void destruct_transport(grpc_exec_ctx *exec_ctx,
      and maybe they hold resources that need to be freed */
   while (t->global.pings.next != &t->global.pings) {
     grpc_chttp2_outstanding_ping *ping = t->global.pings.next;
-    grpc_exec_ctx_enqueue(exec_ctx, ping->on_recv, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, ping->on_recv, false, NULL);
     ping->next->prev = ping->prev;
     ping->prev->next = ping->next;
     gpr_free(ping);
@@ -602,7 +602,7 @@ static void unlock(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t) {
                                          t->parsing_active)) {
     t->writing_active = 1;
     REF_TRANSPORT(t, "writing");
-    grpc_exec_ctx_enqueue(exec_ctx, &t->writing_action, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &t->writing_action, true, NULL);
     prevent_endpoint_shutdown(t);
   }
   check_read_ops(exec_ctx, &t->global);
@@ -631,7 +631,7 @@ static void push_setting(grpc_chttp2_transport *t, grpc_chttp2_setting_id id,
 }
 
 void grpc_chttp2_terminate_writing(grpc_exec_ctx *exec_ctx,
-                                   void *transport_writing_ptr, int success) {
+                                   void *transport_writing_ptr, bool success) {
   grpc_chttp2_transport_writing *transport_writing = transport_writing_ptr;
   grpc_chttp2_transport *t = TRANSPORT_FROM_WRITING(transport_writing);
   grpc_chttp2_stream_global *stream_global;
@@ -669,7 +669,7 @@ void grpc_chttp2_terminate_writing(grpc_exec_ctx *exec_ctx,
 }
 
 static void writing_action(grpc_exec_ctx *exec_ctx, void *gt,
-                           int iomgr_success_ignored) {
+                           bool iomgr_success_ignored) {
   grpc_chttp2_transport *t = gt;
   GPR_TIMER_BEGIN("writing_action", 0);
   grpc_chttp2_perform_writes(exec_ctx, &t->writing, t->ep);
@@ -759,7 +759,7 @@ void grpc_chttp2_complete_closure_step(grpc_exec_ctx *exec_ctx,
     closure->final_data |= 1;
   }
   if (closure->final_data < 2) {
-    grpc_exec_ctx_enqueue(exec_ctx, closure, closure->final_data == 0);
+    grpc_exec_ctx_enqueue(exec_ctx, closure, closure->final_data == 0, NULL);
   }
   *pclosure = NULL;
 }
@@ -777,7 +777,7 @@ static int contains_non_ok_status(
   return 0;
 }
 
-static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, int success) {}
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, bool success) {}
 
 static void perform_stream_op_locked(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global,
@@ -934,7 +934,7 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx,
   for (ping = transport_global->pings.next; ping != &transport_global->pings;
        ping = ping->next) {
     if (0 == memcmp(opaque_8bytes, ping->id, 8)) {
-      grpc_exec_ctx_enqueue(exec_ctx, ping->on_recv, 1);
+      grpc_exec_ctx_enqueue(exec_ctx, ping->on_recv, true, NULL);
       ping->next->prev = ping->prev;
       ping->prev->next = ping->next;
       gpr_free(ping);
@@ -951,7 +951,7 @@ static void perform_transport_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
 
   lock(t);
 
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, 1);
+  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL);
 
   if (op->on_connectivity_state_change != NULL) {
     grpc_connectivity_state_notify_on_state_change(
@@ -1022,11 +1022,13 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
         *stream_global->recv_message = grpc_chttp2_incoming_frame_queue_pop(
             &stream_global->incoming_frames);
         GPR_ASSERT(*stream_global->recv_message != NULL);
-        grpc_exec_ctx_enqueue(exec_ctx, stream_global->recv_message_ready, 1);
+        grpc_exec_ctx_enqueue(exec_ctx, stream_global->recv_message_ready, true,
+                              NULL);
         stream_global->recv_message_ready = NULL;
       } else if (stream_global->published_trailing_metadata) {
         *stream_global->recv_message = NULL;
-        grpc_exec_ctx_enqueue(exec_ctx, stream_global->recv_message_ready, 1);
+        grpc_exec_ctx_enqueue(exec_ctx, stream_global->recv_message_ready, true,
+                              NULL);
         stream_global->recv_message_ready = NULL;
       }
     }
@@ -1336,7 +1338,7 @@ static void read_error_locked(grpc_exec_ctx *exec_ctx,
 }
 
 /* tcp read callback */
-static void recv_data(grpc_exec_ctx *exec_ctx, void *tp, int success) {
+static void recv_data(grpc_exec_ctx *exec_ctx, void *tp, bool success) {
   size_t i;
   int keep_reading = 0;
   grpc_chttp2_transport *t = tp;
@@ -1523,7 +1525,7 @@ static int incoming_byte_stream_next(grpc_exec_ctx *exec_ctx,
     unlock(exec_ctx, bs->transport);
     return 1;
   } else if (bs->failed) {
-    grpc_exec_ctx_enqueue(exec_ctx, on_complete, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, on_complete, false, NULL);
     unlock(exec_ctx, bs->transport);
     return 0;
   } else {
@@ -1552,7 +1554,7 @@ void grpc_chttp2_incoming_byte_stream_push(grpc_exec_ctx *exec_ctx,
   gpr_mu_lock(&bs->transport->mu);
   if (bs->on_next != NULL) {
     *bs->next = slice;
-    grpc_exec_ctx_enqueue(exec_ctx, bs->on_next, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, bs->on_next, true, NULL);
     bs->on_next = NULL;
   } else {
     gpr_slice_buffer_add(&bs->slices, slice);
@@ -1567,7 +1569,7 @@ void grpc_chttp2_incoming_byte_stream_finished(
     if (from_parsing_thread) {
       gpr_mu_lock(&bs->transport->mu);
     }
-    grpc_exec_ctx_enqueue(exec_ctx, bs->on_next, 0);
+    grpc_exec_ctx_enqueue(exec_ctx, bs->on_next, false, NULL);
     bs->on_next = NULL;
     bs->failed = 1;
     if (from_parsing_thread) {
diff --git a/src/core/transport/connectivity_state.c b/src/core/transport/connectivity_state.c
index 3c3fd4671db96c5f667845406a81cf23ba78924e..87765b9799d6c6e782ba220e2b8a04ee86919ce1 100644
--- a/src/core/transport/connectivity_state.c
+++ b/src/core/transport/connectivity_state.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -78,7 +78,7 @@ void grpc_connectivity_state_destroy(grpc_exec_ctx *exec_ctx,
     } else {
       success = 0;
     }
-    grpc_exec_ctx_enqueue(exec_ctx, w->notify, success);
+    grpc_exec_ctx_enqueue(exec_ctx, w->notify, success, NULL);
     gpr_free(w);
   }
   gpr_free(tracker->name);
@@ -109,7 +109,7 @@ int grpc_connectivity_state_notify_on_state_change(
   if (current == NULL) {
     grpc_connectivity_state_watcher *w = tracker->watchers;
     if (w != NULL && w->notify == notify) {
-      grpc_exec_ctx_enqueue(exec_ctx, notify, 0);
+      grpc_exec_ctx_enqueue(exec_ctx, notify, false, NULL);
       tracker->watchers = w->next;
       gpr_free(w);
       return 0;
@@ -117,7 +117,7 @@ int grpc_connectivity_state_notify_on_state_change(
     while (w != NULL) {
       grpc_connectivity_state_watcher *rm_candidate = w->next;
       if (rm_candidate != NULL && rm_candidate->notify == notify) {
-        grpc_exec_ctx_enqueue(exec_ctx, notify, 0);
+        grpc_exec_ctx_enqueue(exec_ctx, notify, false, NULL);
         w->next = w->next->next;
         gpr_free(rm_candidate);
         return 0;
@@ -128,7 +128,7 @@ int grpc_connectivity_state_notify_on_state_change(
   } else {
     if (tracker->current_state != *current) {
       *current = tracker->current_state;
-      grpc_exec_ctx_enqueue(exec_ctx, notify, 1);
+      grpc_exec_ctx_enqueue(exec_ctx, notify, true, NULL);
     } else {
       grpc_connectivity_state_watcher *w = gpr_malloc(sizeof(*w));
       w->current = current;
@@ -158,7 +158,7 @@ void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
   while ((w = tracker->watchers) != NULL) {
     *w->current = tracker->current_state;
     tracker->watchers = w->next;
-    grpc_exec_ctx_enqueue(exec_ctx, w->notify, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, w->notify, true, NULL);
     gpr_free(w);
   }
 }
diff --git a/src/core/transport/transport.c b/src/core/transport/transport.c
index 2ab978be46118ad7d05b2c32e581211f99107daf..08d685668ccb73a2b418faa5c17b96c973f287bf 100644
--- a/src/core/transport/transport.c
+++ b/src/core/transport/transport.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,7 +59,7 @@ void grpc_stream_unref(grpc_exec_ctx *exec_ctx,
                        grpc_stream_refcount *refcount) {
 #endif
   if (gpr_unref(&refcount->refs)) {
-    grpc_exec_ctx_enqueue(exec_ctx, &refcount->destroy, 1);
+    grpc_exec_ctx_enqueue(exec_ctx, &refcount->destroy, true, NULL);
   }
 }
 
@@ -125,8 +125,8 @@ char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
 
 void grpc_transport_stream_op_finish_with_failure(
     grpc_exec_ctx *exec_ctx, grpc_transport_stream_op *op) {
-  grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, 0);
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, 0);
+  grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, false, NULL);
+  grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, false, NULL);
 }
 
 void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
@@ -150,7 +150,7 @@ typedef struct {
   grpc_closure closure;
 } close_message_data;
 
-static void free_message(grpc_exec_ctx *exec_ctx, void *p, int iomgr_success) {
+static void free_message(grpc_exec_ctx *exec_ctx, void *p, bool iomgr_success) {
   close_message_data *cmd = p;
   gpr_slice_unref(cmd->message);
   if (cmd->then_call != NULL) {
diff --git a/src/core/transport/transport.h b/src/core/transport/transport.h
index f94f0ae76e1449766f84ceb1c55140cb2b416e3f..f5cac77adcc51b70fe402ba279fc87da171a0881 100644
--- a/src/core/transport/transport.h
+++ b/src/core/transport/transport.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,16 +81,29 @@ void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount);
 /* Transport stream op: a set of operations to perform on a transport
    against a single stream */
 typedef struct grpc_transport_stream_op {
+  /** Send initial metadata to the peer, from the provided metadata batch. */
   grpc_metadata_batch *send_initial_metadata;
+
+  /** Send trailing metadata to the peer, from the provided metadata batch. */
   grpc_metadata_batch *send_trailing_metadata;
 
+  /** Send message data to the peer, from the provided byte stream. */
   grpc_byte_stream *send_message;
 
+  /** Receive initial metadata from the stream, into provided metadata batch. */
   grpc_metadata_batch *recv_initial_metadata;
+
+  /** Receive message data from the stream, into provided byte stream. */
   grpc_byte_stream **recv_message;
+  /** Should be enqueued when one message is ready to be processed. */
   grpc_closure *recv_message_ready;
+
+  /** Receive trailing metadata from the stream, into provided metadata batch.
+   */
   grpc_metadata_batch *recv_trailing_metadata;
 
+  /** Should be enqueued when all requested operations (excluding recv_message
+     which has its own closure) in a given batch have been completed. */
   grpc_closure *on_complete;
 
   /** If != GRPC_STATUS_OK, cancel this stream */
diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel.cc
index c7974d655bfc574ee958ea4b089289dd4e3d91f7..ae20392d1160c7f72b14975753b13f93ab6267e9 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,24 +35,29 @@
 
 #include <memory>
 
-#include <grpc/grpc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/slice.h>
 #include <grpc++/client_context.h>
 #include <grpc++/completion_queue.h>
-#include <grpc++/security/credentials.h>
 #include <grpc++/impl/call.h>
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <grpc++/impl/grpc_library.h>
 #include <grpc++/impl/rpc_method.h>
+#include <grpc++/security/credentials.h>
 #include <grpc++/support/channel_arguments.h>
 #include <grpc++/support/config.h>
 #include <grpc++/support/status.h>
 #include <grpc++/support/time.h>
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
 #include "src/core/profiling/timers.h"
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
 Channel::Channel(const grpc::string& host, grpc_channel* channel)
-    : host_(host), c_channel_(channel) {}
+    : host_(host), c_channel_(channel) {
+  g_gli_initializer.summon();
+}
 
 Channel::~Channel() { grpc_channel_destroy(c_channel_); }
 
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index 710d7cb5c2686d1bf7354abf4f6bf071ec3f1cf2..73147fd7bb21b37de0c67a01ed9be04b06448ef9 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -33,6 +33,7 @@
 
 #include <grpc++/client_context.h>
 
+#include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
diff --git a/src/cpp/client/create_channel.cc b/src/cpp/client/create_channel.cc
index 3bbca807d37e1ff6d790148ad74a75996c5d0397..fdaa28ffef22eaa49de6a573ebdf5319ab76b68c 100644
--- a/src/cpp/client/create_channel.cc
+++ b/src/cpp/client/create_channel.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,6 +36,7 @@
 
 #include <grpc++/channel.h>
 #include <grpc++/create_channel.h>
+#include <grpc++/impl/grpc_library.h>
 #include <grpc++/support/channel_arguments.h>
 
 #include "src/cpp/client/create_channel_internal.h"
@@ -53,7 +54,8 @@ std::shared_ptr<Channel> CreateCustomChannel(
     const grpc::string& target,
     const std::shared_ptr<ChannelCredentials>& creds,
     const ChannelArguments& args) {
-  GrpcLibrary init_lib;  // We need to call init in case of a bad creds.
+  internal::GrpcLibrary
+      init_lib;  // We need to call init in case of a bad creds.
   ChannelArguments cp_args = args;
   std::ostringstream user_agent_prefix;
   user_agent_prefix << "grpc-c++/" << grpc_version_string();
diff --git a/src/cpp/client/credentials.cc b/src/cpp/client/credentials.cc
index 0c08db11a9c5f87ae86ae33cf4763b15032a1b4c..6fb620b0ea8b7c00a815b24b12bafcf5944231cc 100644
--- a/src/cpp/client/credentials.cc
+++ b/src/cpp/client/credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,18 @@
  *
  */
 
+#include <grpc++/impl/grpc_library.h>
 #include <grpc++/security/credentials.h>
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
+ChannelCredentials::ChannelCredentials() { g_gli_initializer.summon(); }
+
 ChannelCredentials::~ChannelCredentials() {}
 
+CallCredentials::CallCredentials() { g_gli_initializer.summon(); }
+
 CallCredentials::~CallCredentials() {}
 
 }  // namespace grpc
diff --git a/src/cpp/client/secure_credentials.cc b/src/cpp/client/secure_credentials.cc
index 96ae25b7612ab60085e3cdbc4c98f0159163e6c9..074dae7ca7900cdd652d72a522b854136d66165f 100644
--- a/src/cpp/client/secure_credentials.cc
+++ b/src/cpp/client/secure_credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,13 @@
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
+SecureChannelCredentials::SecureChannelCredentials(
+    grpc_channel_credentials* c_creds)
+    : c_creds_(c_creds) {
+  g_gli_initializer.summon();
+}
+
 std::shared_ptr<grpc::Channel> SecureChannelCredentials::CreateChannel(
     const string& target, const grpc::ChannelArguments& args) {
   grpc_channel_args channel_args;
@@ -51,6 +58,12 @@ std::shared_ptr<grpc::Channel> SecureChannelCredentials::CreateChannel(
                                  nullptr));
 }
 
+SecureCallCredentials::SecureCallCredentials(grpc_call_credentials* c_creds)
+    : c_creds_(c_creds) {
+  internal::GrpcLibraryInitializer gli_initializer;
+  gli_initializer.summon();
+}
+
 bool SecureCallCredentials::ApplyToCall(grpc_call* call) {
   return grpc_call_set_credentials(call, c_creds_) == GRPC_CALL_OK;
 }
diff --git a/src/cpp/client/secure_credentials.h b/src/cpp/client/secure_credentials.h
index cef59292ddd2312e55a2c641172bb4f8870e7c3b..9e841021543a52844c5fc4d2323e045ef29ca00a 100644
--- a/src/cpp/client/secure_credentials.h
+++ b/src/cpp/client/secure_credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,11 +45,8 @@ namespace grpc {
 
 class SecureChannelCredentials GRPC_FINAL : public ChannelCredentials {
  public:
-  explicit SecureChannelCredentials(grpc_channel_credentials* c_creds)
-      : c_creds_(c_creds) {}
-  ~SecureChannelCredentials() GRPC_OVERRIDE {
-    grpc_channel_credentials_release(c_creds_);
-  }
+  explicit SecureChannelCredentials(grpc_channel_credentials* c_creds);
+  ~SecureChannelCredentials() { grpc_channel_credentials_release(c_creds_); }
   grpc_channel_credentials* GetRawCreds() { return c_creds_; }
 
   std::shared_ptr<grpc::Channel> CreateChannel(
@@ -62,11 +59,8 @@ class SecureChannelCredentials GRPC_FINAL : public ChannelCredentials {
 
 class SecureCallCredentials GRPC_FINAL : public CallCredentials {
  public:
-  explicit SecureCallCredentials(grpc_call_credentials* c_creds)
-      : c_creds_(c_creds) {}
-  ~SecureCallCredentials() GRPC_OVERRIDE {
-    grpc_call_credentials_release(c_creds_);
-  }
+  explicit SecureCallCredentials(grpc_call_credentials* c_creds);
+  ~SecureCallCredentials() { grpc_call_credentials_release(c_creds_); }
   grpc_call_credentials* GetRawCreds() { return c_creds_; }
 
   bool ApplyToCall(grpc_call* call) GRPC_OVERRIDE;
diff --git a/src/cpp/codegen/grpc_library.cc b/src/cpp/codegen/grpc_library.cc
new file mode 100644
index 0000000000000000000000000000000000000000..48acec3f3d1ceecd346af69cdfab6ccebbbeb459
--- /dev/null
+++ b/src/cpp/codegen/grpc_library.cc
@@ -0,0 +1,40 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/impl/codegen/grpc_library.h>
+
+namespace grpc {
+
+GrpcLibraryInterface *g_glip = nullptr;
+
+}  // namespace grpc
diff --git a/src/cpp/common/alarm.cc b/src/cpp/common/alarm.cc
index 1f0f04175eea870968f8d4ca405cf1d8dc83b957..807a67df246b4d44e2dcf101f6b30eeb9273d72e 100644
--- a/src/cpp/common/alarm.cc
+++ b/src/cpp/common/alarm.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,13 +30,18 @@
  *
  */
 
-#include <grpc/grpc.h>
 #include <grpc++/alarm.h>
+#include <grpc++/completion_queue.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc/grpc.h>
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
 Alarm::Alarm(CompletionQueue* cq, gpr_timespec deadline, void* tag)
-    : alarm_(grpc_alarm_create(cq->cq(), deadline, tag)) {}
+    : alarm_(grpc_alarm_create(cq->cq(), deadline, tag)) {
+  g_gli_initializer.summon();
+}
 
 Alarm::~Alarm() { grpc_alarm_destroy(alarm_); }
 
diff --git a/src/cpp/common/completion_queue.cc b/src/cpp/common/completion_queue.cc
index a175beb452c97b7f1b1d62fce308bb3ee401b8a6..4f76dfff1d7a73d4eb823f16a4638c2d8f90c12a 100644
--- a/src/cpp/common/completion_queue.cc
+++ b/src/cpp/common/completion_queue.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,13 +34,17 @@
 
 #include <memory>
 
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc++/support/time.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
-#include <grpc++/support/time.h>
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
 CompletionQueue::CompletionQueue() {
+  g_gli_initializer.summon();
   cq_ = grpc_completion_queue_create(nullptr);
 }
 
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
index 3bf9f3fa0f25ea1f8e09d16ea5ef19ec89f299e9..0d31140924bfcc8286a0b5c9467f06cc89af7801 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server.cc
@@ -35,16 +35,19 @@
 
 #include <utility>
 
-#include <grpc/grpc.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
 #include <grpc++/completion_queue.h>
 #include <grpc++/generic/async_generic_service.h>
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc++/impl/method_handler_impl.h>
 #include <grpc++/impl/rpc_service_method.h>
 #include <grpc++/impl/service_type.h>
-#include <grpc++/server_context.h>
 #include <grpc++/security/server_credentials.h>
+#include <grpc++/server_context.h>
 #include <grpc++/support/time.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 
 #include "src/core/profiling/timers.h"
 #include "src/cpp/server/thread_pool_interface.h"
@@ -275,6 +278,7 @@ static grpc_server* CreateServer(const ChannelArguments& args) {
   return grpc_server_create(&channel_args, nullptr);
 }
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
 Server::Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
                int max_message_size, const ChannelArguments& args)
     : max_message_size_(max_message_size),
@@ -286,6 +290,7 @@ Server::Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
       server_(CreateServer(args)),
       thread_pool_(thread_pool),
       thread_pool_owned_(thread_pool_owned) {
+  g_gli_initializer.summon();
   gpr_once_init(&g_once_init_callbacks, InitGlobalCallbacks);
   global_callbacks_ = g_callbacks;
   grpc_server_register_completion_queue(server_, cq_.cq(), nullptr);
@@ -297,6 +302,8 @@ Server::~Server() {
     if (started_ && !shutdown_) {
       lock.unlock();
       Shutdown();
+    } else if (!started_) {
+      cq_.Shutdown();
     }
   }
   void* got_tag;
@@ -315,36 +322,31 @@ void Server::SetGlobalCallbacks(GlobalCallbacks* callbacks) {
   g_callbacks.reset(callbacks);
 }
 
-bool Server::RegisterService(const grpc::string* host, RpcService* service) {
-  for (int i = 0; i < service->GetMethodCount(); ++i) {
-    RpcServiceMethod* method = service->GetMethod(i);
+bool Server::RegisterService(const grpc::string* host, Service* service) {
+  bool has_async_methods = service->has_async_methods();
+  if (has_async_methods) {
+    GPR_ASSERT(service->server_ == nullptr &&
+               "Can only register an asynchronous service against one server.");
+    service->server_ = this;
+  }
+  for (auto it = service->methods_.begin(); it != service->methods_.end();
+       ++it) {
+    if (it->get() == nullptr) {  // Handled by generic service if any.
+      continue;
+    }
+    RpcServiceMethod* method = it->get();
     void* tag = grpc_server_register_method(server_, method->name(),
                                             host ? host->c_str() : nullptr);
-    if (!tag) {
+    if (tag == nullptr) {
       gpr_log(GPR_DEBUG, "Attempt to register %s multiple times",
               method->name());
       return false;
     }
-    sync_methods_->emplace_back(method, tag);
-  }
-  return true;
-}
-
-bool Server::RegisterAsyncService(const grpc::string* host,
-                                  AsynchronousService* service) {
-  GPR_ASSERT(service->server_ == nullptr &&
-             "Can only register an asynchronous service against one server.");
-  service->server_ = this;
-  service->request_args_ = new void* [service->method_count_];
-  for (size_t i = 0; i < service->method_count_; ++i) {
-    void* tag = grpc_server_register_method(server_, service->method_names_[i],
-                                            host ? host->c_str() : nullptr);
-    if (!tag) {
-      gpr_log(GPR_DEBUG, "Attempt to register %s multiple times",
-              service->method_names_[i]);
-      return false;
+    if (method->handler() == nullptr) {
+      method->set_server_tag(tag);
+    } else {
+      sync_methods_->emplace_back(method, tag);
     }
-    service->request_args_[i] = tag;
   }
   return true;
 }
@@ -440,8 +442,8 @@ void Server::PerformOpsOnCall(CallOpSetInterface* ops, Call* call) {
   GPR_ASSERT(GRPC_CALL_OK == result);
 }
 
-Server::BaseAsyncRequest::BaseAsyncRequest(
-    Server* server, ServerContext* context,
+ServerInterface::BaseAsyncRequest::BaseAsyncRequest(
+    ServerInterface* server, ServerContext* context,
     ServerAsyncStreamingInterface* stream, CompletionQueue* call_cq, void* tag,
     bool delete_on_finalize)
     : server_(server),
@@ -454,9 +456,8 @@ Server::BaseAsyncRequest::BaseAsyncRequest(
   memset(&initial_metadata_array_, 0, sizeof(initial_metadata_array_));
 }
 
-Server::BaseAsyncRequest::~BaseAsyncRequest() {}
-
-bool Server::BaseAsyncRequest::FinalizeResult(void** tag, bool* status) {
+bool ServerInterface::BaseAsyncRequest::FinalizeResult(void** tag,
+                                                       bool* status) {
   if (*status) {
     for (size_t i = 0; i < initial_metadata_array_.count; i++) {
       context_->client_metadata_.insert(
@@ -470,7 +471,7 @@ bool Server::BaseAsyncRequest::FinalizeResult(void** tag, bool* status) {
   grpc_metadata_array_destroy(&initial_metadata_array_);
   context_->set_call(call_);
   context_->cq_ = call_cq_;
-  Call call(call_, server_, call_cq_, server_->max_message_size_);
+  Call call(call_, server_, call_cq_, server_->max_message_size());
   if (*status && call_) {
     context_->BeginCompletionOp(&call);
   }
@@ -483,22 +484,22 @@ bool Server::BaseAsyncRequest::FinalizeResult(void** tag, bool* status) {
   return true;
 }
 
-Server::RegisteredAsyncRequest::RegisteredAsyncRequest(
-    Server* server, ServerContext* context,
+ServerInterface::RegisteredAsyncRequest::RegisteredAsyncRequest(
+    ServerInterface* server, ServerContext* context,
     ServerAsyncStreamingInterface* stream, CompletionQueue* call_cq, void* tag)
     : BaseAsyncRequest(server, context, stream, call_cq, tag, true) {}
 
-void Server::RegisteredAsyncRequest::IssueRequest(
+void ServerInterface::RegisteredAsyncRequest::IssueRequest(
     void* registered_method, grpc_byte_buffer** payload,
     ServerCompletionQueue* notification_cq) {
   grpc_server_request_registered_call(
-      server_->server_, registered_method, &call_, &context_->deadline_,
+      server_->server(), registered_method, &call_, &context_->deadline_,
       &initial_metadata_array_, payload, call_cq_->cq(), notification_cq->cq(),
       this);
 }
 
-Server::GenericAsyncRequest::GenericAsyncRequest(
-    Server* server, GenericServerContext* context,
+ServerInterface::GenericAsyncRequest::GenericAsyncRequest(
+    ServerInterface* server, GenericServerContext* context,
     ServerAsyncStreamingInterface* stream, CompletionQueue* call_cq,
     ServerCompletionQueue* notification_cq, void* tag, bool delete_on_finalize)
     : BaseAsyncRequest(server, context, stream, call_cq, tag,
@@ -506,12 +507,13 @@ Server::GenericAsyncRequest::GenericAsyncRequest(
   grpc_call_details_init(&call_details_);
   GPR_ASSERT(notification_cq);
   GPR_ASSERT(call_cq);
-  grpc_server_request_call(server->server_, &call_, &call_details_,
+  grpc_server_request_call(server->server(), &call_, &call_details_,
                            &initial_metadata_array_, call_cq->cq(),
                            notification_cq->cq(), this);
 }
 
-bool Server::GenericAsyncRequest::FinalizeResult(void** tag, bool* status) {
+bool ServerInterface::GenericAsyncRequest::FinalizeResult(void** tag,
+                                                          bool* status) {
   // TODO(yangg) remove the copy here.
   if (*status) {
     static_cast<GenericServerContext*>(context_)->method_ =
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 26c0724a30a09ccfcb75a587c768ef8dd95025ba..a8c188e5a55dd20ab0b485ca70b534ae53630816 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,7 +43,7 @@
 namespace grpc {
 
 ServerBuilder::ServerBuilder()
-    : max_message_size_(-1), generic_service_(nullptr), thread_pool_(nullptr) {
+    : max_message_size_(-1), generic_service_(nullptr) {
   grpc_compression_options_init(&compression_options_);
 }
 
@@ -53,24 +53,13 @@ std::unique_ptr<ServerCompletionQueue> ServerBuilder::AddCompletionQueue() {
   return std::unique_ptr<ServerCompletionQueue>(cq);
 }
 
-void ServerBuilder::RegisterService(SynchronousService* service) {
-  services_.emplace_back(new NamedService<RpcService>(service->service()));
-}
-
-void ServerBuilder::RegisterAsyncService(AsynchronousService* service) {
-  async_services_.emplace_back(new NamedService<AsynchronousService>(service));
+void ServerBuilder::RegisterService(Service* service) {
+  services_.emplace_back(new NamedService(service));
 }
 
 void ServerBuilder::RegisterService(const grpc::string& addr,
-                                    SynchronousService* service) {
-  services_.emplace_back(
-      new NamedService<RpcService>(addr, service->service()));
-}
-
-void ServerBuilder::RegisterAsyncService(const grpc::string& addr,
-                                         AsynchronousService* service) {
-  async_services_.emplace_back(
-      new NamedService<AsynchronousService>(addr, service));
+                                    Service* service) {
+  services_.emplace_back(new NamedService(addr, service));
 }
 
 void ServerBuilder::RegisterAsyncGenericService(AsyncGenericService* service) {
@@ -96,14 +85,14 @@ void ServerBuilder::AddListeningPort(const grpc::string& addr,
 }
 
 std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
-  bool thread_pool_owned = false;
-  if (!async_services_.empty() && !services_.empty()) {
-    gpr_log(GPR_ERROR, "Mixing async and sync services is unsupported for now");
-    return nullptr;
-  }
-  if (!thread_pool_ && !services_.empty()) {
-    thread_pool_ = CreateDefaultThreadPool();
-    thread_pool_owned = true;
+  std::unique_ptr<ThreadPoolInterface> thread_pool;
+  for (auto it = services_.begin(); it != services_.end(); ++it) {
+    if ((*it)->service->has_synchronous_methods()) {
+      if (thread_pool == nullptr) {
+        thread_pool.reset(CreateDefaultThreadPool());
+        break;
+      }
+    }
   }
   ChannelArguments args;
   for (auto option = options_.begin(); option != options_.end(); ++option) {
@@ -115,7 +104,7 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
   args.SetInt(GRPC_COMPRESSION_ALGORITHM_STATE_ARG,
               compression_options_.enabled_algorithms_bitset);
   std::unique_ptr<Server> server(
-      new Server(thread_pool_, thread_pool_owned, max_message_size_, args));
+      new Server(thread_pool.release(), true, max_message_size_, args));
   for (auto cq = cqs_.begin(); cq != cqs_.end(); ++cq) {
     grpc_server_register_completion_queue(server->server_, (*cq)->cq(),
                                           nullptr);
@@ -126,15 +115,17 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
       return nullptr;
     }
   }
-  for (auto service = async_services_.begin(); service != async_services_.end();
-       service++) {
-    if (!server->RegisterAsyncService((*service)->host.get(),
-                                      (*service)->service)) {
-      return nullptr;
-    }
-  }
   if (generic_service_) {
     server->RegisterAsyncGenericService(generic_service_);
+  } else {
+    for (auto it = services_.begin(); it != services_.end(); ++it) {
+      if ((*it)->service->has_generic_methods()) {
+        gpr_log(GPR_ERROR,
+                "Some methods were marked generic but there is no "
+                "generic service registered.");
+        return nullptr;
+      }
+    }
   }
   for (auto port = ports_.begin(); port != ports_.end(); port++) {
     int r = server->AddListeningPort(port->addr, port->creds.get());
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index b3a74c7fce61f51d0f26cfffd05dc353a435fcd7..3732c1f090c7679dc637c1544efe20591f7511c7 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -33,9 +33,11 @@
 
 #include <grpc++/server_context.h>
 
+#include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc++/completion_queue.h>
 #include <grpc++/impl/call.h>
 #include <grpc++/impl/sync.h>
 #include <grpc++/support/time.h>
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer.cc
index 2952f94b2403e3743d87b8d0ed244c91472ad161..3a2318d1a60f57b17f6da66b016e891c94e7b2fa 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer.cc
@@ -31,8 +31,8 @@
  *
  */
 
-#include <grpc/byte_buffer_reader.h>
 #include <grpc++/support/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
 
 namespace grpc {
 
@@ -84,8 +84,10 @@ ByteBuffer::ByteBuffer(const ByteBuffer& buf)
     : buffer_(grpc_byte_buffer_copy(buf.buffer_)) {}
 
 ByteBuffer& ByteBuffer::operator=(const ByteBuffer& buf) {
-  Clear();                                       // first remove existing data
-  buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
+  Clear();  // first remove existing data
+  if (buf.buffer_) {
+    buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
+  }
   return *this;
 }
 
diff --git a/src/node/performance/benchmark_server.js b/src/node/performance/benchmark_server.js
index ba61e52ba1b8b5aecc9e7e269ca31a0aa71b6f15..e48acd48f5d0faef1961fae0d00b9816a11e6a3c 100644
--- a/src/node/performance/benchmark_server.js
+++ b/src/node/performance/benchmark_server.js
@@ -76,7 +76,7 @@ function unaryCall(call, callback) {
  */
 function streamingCall(call) {
   call.on('data', function(value) {
-    var payload = {body: zeroBuffer(value.repsonse_size)};
+    var payload = {body: zeroBuffer(value.response_size)};
     call.write({payload: payload});
   });
   call.on('end', function() {
diff --git a/src/node/performance/worker_service_impl.js b/src/node/performance/worker_service_impl.js
index 8841ae13c3e194bb3ca47087672403bbef9f0033..99ae32127e773f6fbd9a16a024dc39c4fe82b3be 100644
--- a/src/node/performance/worker_service_impl.js
+++ b/src/node/performance/worker_service_impl.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -99,7 +99,7 @@ exports.runServer = function runServer(call) {
     var stats;
     switch (request.argtype) {
       case 'setup':
-      server = new BenchmarkServer(request.setup.host, request.setup.port,
+      server = new BenchmarkServer('[::]', request.setup.port,
                                    request.setup.security_params);
       server.start();
       stats = server.mark();
diff --git a/src/node/src/grpc_extension.js b/src/node/src/grpc_extension.js
index d4eca65fcbf422595644820d7b8ba00d51c986eb..6a8fe2c03c9f3b4002067f3f2ae5ec79730464ea 100644
--- a/src/node/src/grpc_extension.js
+++ b/src/node/src/grpc_extension.js
@@ -33,8 +33,8 @@
 
 var binary = require('node-pre-gyp');
 var path = require('path');
-var binding_path = binary.find(path.resolve(
-    path.join(__dirname,'../../../package.json')));
+var binding_path =
+    binary.find(path.resolve(path.join(__dirname, '../../../package.json')));
 var binding = require(binding_path);
 
 module.exports = binding;
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index c65d95f76730f6cc47be74fb816c878cd4a95764..530f1f774949e6fbb911205e0fb270a196cf471f 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -970,9 +970,7 @@ describe('Call propagation', function() {
       proxy.start();
       var proxy_client = new Client('localhost:' + proxy_port,
                                     grpc.credentials.createInsecure());
-      call = proxy_client.unary({}, function(err, value) {
-        done();
-      });
+      call = proxy_client.unary({}, function(err, value) { done(); });
     });
     it('With a client stream call', function(done) {
       done = multiDone(done, 2);
@@ -994,9 +992,7 @@ describe('Call propagation', function() {
       proxy.start();
       var proxy_client = new Client('localhost:' + proxy_port,
                                     grpc.credentials.createInsecure());
-      call = proxy_client.clientStream(function(err, value) {
-        done();
-      });
+      call = proxy_client.clientStream(function(err, value) { done(); });
     });
     it('With a server stream call', function(done) {
       done = multiDone(done, 2);
diff --git a/src/objective-c/BoringSSL.podspec b/src/objective-c/BoringSSL.podspec
index f5b738203d6d6ca3d69d5bf60b8ba2dfed0b1375..4a6df910a75c082fd949169479491866731c6582 100644
--- a/src/objective-c/BoringSSL.podspec
+++ b/src/objective-c/BoringSSL.podspec
@@ -31,7 +31,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'BoringSSL'
-  s.version  = '1.0'
+  s.version  = '2.0'
   s.summary  = 'BoringSSL is a fork of OpenSSL that is designed to meet Google’s needs.'
   # Adapted from the homepage:
   s.description = <<-DESC
@@ -67,7 +67,7 @@ Pod::Spec.new do |s|
   s.authors  = 'Adam Langley', 'David Benjamin', 'Matt Braithwaite'
 
   s.source = { :git => 'https://boringssl.googlesource.com/boringssl',
-               :tag => 'version_for_cocoapods_1.0' }
+               :tag => 'version_for_cocoapods_2.0' }
 
   s.source_files = 'ssl/*.{h,c}',
                    'ssl/**/*.{h,c}',
diff --git a/src/proto/grpc/testing/control.proto b/src/proto/grpc/testing/control.proto
index 0784ebf91cb4b27e7442a316095231156e472a41..2f352e652f323945a613be6a5bb233a8c47b71df 100644
--- a/src/proto/grpc/testing/control.proto
+++ b/src/proto/grpc/testing/control.proto
@@ -1,4 +1,4 @@
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -42,6 +42,7 @@ enum ClientType {
 enum ServerType {
   SYNC_SERVER = 0;
   ASYNC_SERVER = 1;
+  ASYNC_GENERIC_SERVER = 2;
 }
 
 enum RpcType {
@@ -126,8 +127,6 @@ message ClientArgs {
 message ServerConfig {
   ServerType server_type = 1;
   SecurityParams security_params = 2;
-  // Host on which to listen.
-  string host = 3;
   // Port on which to listen. Zero means pick unused port.
   int32 port = 4;
   // Only for async server. Number of threads used to serve the requests.
diff --git a/src/proto/grpc/testing/echo_messages.proto b/src/proto/grpc/testing/echo_messages.proto
index f01d645af732910adffa40bf251332c0c3bea4a5..d05a35548d19957517cd534be75cb4f9110135cd 100644
--- a/src/proto/grpc/testing/echo_messages.proto
+++ b/src/proto/grpc/testing/echo_messages.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,7 @@ message RequestParams {
   int32 response_message_length = 6;
   bool echo_peer = 7;
   string expected_client_identity = 8; // will force check_auth_context.
+  bool skip_cancelled_check = 9;
 }
 
 message EchoRequest {
diff --git a/src/python/README.md b/src/python/README.md
deleted file mode 100644
index 8b167659ff7b90a08c7bcf5bb88afd0903efe8b8..0000000000000000000000000000000000000000
--- a/src/python/README.md
+++ /dev/null
@@ -1,100 +0,0 @@
-gRPC Python
-=========
-The Python facility of gRPC.
-
-Status
--------
-Beta : Core behavior well-used and proven; bugs lurk off the beaten path.
-
-PREREQUISITES
--------------
-- python-virtualenv, python-pip, python3-pip, python-dev, python3-dev
-- [homebrew][] on Mac OS X.  These simplify the installation of the gRPC C core.
-
-INSTALLATION
--------------
-
-**Linux (Debian):**
-
-Add [Debian jessie-backports][] to your `sources.list` file. Example:
-
-```sh
-echo "deb http://http.debian.net/debian jessie-backports main" | \
-sudo tee -a /etc/apt/sources.list
-```
-
-Install the gRPC Debian package
-
-```sh
-sudo apt-get update
-sudo apt-get install libgrpc-dev
-```
-
-Install the gRPC Python module
-
-```sh
-sudo pip install grpcio
-```
-
-**Mac OS X**
-
-Install [homebrew][]. Run the following command to install gRPC Python.
-```sh
-$ curl -fsSL https://goo.gl/getgrpc | bash -s python
-```
-This will download and run the [gRPC install script][], then install the latest version of the gRPC Python package.  It also installs the Protocol Buffers compiler (_protoc_) and the gRPC _protoc_ plugin for python.
-
-EXAMPLES
---------
-Please read our online documentation for a [Quick Start][] and a [detailed example][]
-
-BUILDING FROM SOURCE
----------------------
-- Clone this repository
-
-- Install tox
-```
-$ sudo pip install tox
-```
-
-- Initialize the git submodules
-```
-$ git submodule update --init
-```
-
-- Make the libraries
-```
-$ make
-```
-
-- Use build_python.sh to build the Python code and install it into a virtual environment
-```
-$ CONFIG=opt tools/run_tests/build_python.sh
-```
-
-TESTING
--------
-
-- Use run_python.sh to run gRPC as it was installed into the virtual environment
-```
-$ CONFIG=opt PYVER=2.7 tools/run_tests/run_python.sh
-```
-
-PACKAGING
----------
-
-- Install packaging dependencies
-```
-$ pip install setuptools twine
-```
-
-- Push to PyPI
-```
-$ ../../tools/distrib/python/submit.py
-```
-
-[homebrew]:http://brew.sh
-[gRPC install script]:https://raw.githubusercontent.com/grpc/homebrew-grpc/master/scripts/install
-[Quick Start]:http://www.grpc.io/docs/tutorials/basic/python.html
-[detailed example]:http://www.grpc.io/docs/installation/python.html
-[Debian jessie-backports]:http://backports.debian.org/Instructions/
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 29b506abe0aadf127b5250f155e31a6166dfbe73..a6b8ad3fc052cdbd1d02f6e36ec07c13e15f0021 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -30,15 +30,22 @@
 """Provides distutils command classes for the GRPC Python setup process."""
 
 import distutils
+import glob
 import os
 import os.path
+import platform
 import re
+import shutil
 import subprocess
 import sys
+import traceback
 
 import setuptools
+from setuptools.command import bdist_egg
 from setuptools.command import build_ext
 from setuptools.command import build_py
+from setuptools.command import easy_install
+from setuptools.command import install
 from setuptools.command import test
 
 import support
@@ -58,6 +65,129 @@ class CommandError(Exception):
   """Simple exception class for GRPC custom commands."""
 
 
+# TODO(atash): Remove this once PyPI has better Linux bdist support. See
+# https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
+def _get_linux_bdist_egg(decorated_basename, target_egg_basename):
+  """Returns a string path to a .egg file for Linux to install.
+
+  If we can retrieve a pre-compiled egg from online, uses it. Else, emits a
+  warning and builds from source.
+  """
+  # Break import style to ensure that setup.py has had a chance to install the
+  # relevant package eggs.
+  from six.moves.urllib import request
+  decorated_path = decorated_basename + '.egg'
+  try:
+    url = (
+        'https://storage.googleapis.com/grpc-precompiled-binaries/'
+        'python/{target}'
+            .format(target=decorated_path))
+    egg_data = request.urlopen(url).read()
+  except IOError as error:
+    raise CommandError(
+        '{}\n\nCould not find the bdist egg {}: {}'
+            .format(traceback.format_exc(), decorated_path, error.message))
+  # Our chosen local egg path.
+  egg_path = target_egg_basename + '.egg'
+  try:
+    with open(egg_path, 'w') as egg_file:
+      egg_file.write(egg_data)
+  except IOError as error:
+    raise CommandError(
+        '{}\n\nCould not write grpcio egg: {}'
+            .format(traceback.format_exc(), error.message))
+  return egg_path
+
+
+class EggNameMixin(object):
+
+  def egg_name(self, with_custom):
+    """
+    Args:
+      with_custom: Boolean describing whether or not to decorate the egg name
+        with custom gRPC-specific target information.
+    """
+    egg_command = self.get_finalized_command('bdist_egg')
+    base = os.path.splitext(os.path.basename(egg_command.egg_output))[0]
+    if with_custom:
+      flavor = 'ucs2' if sys.maxunicode == 65535 else 'ucs4'
+      return '{base}-{flavor}'.format(base=base, flavor=flavor)
+    else:
+      return base
+
+
+class Install(install.install, EggNameMixin):
+  """Custom Install command for gRPC Python.
+
+  This is for bdist shims and whatever else we might need a custom install
+  command for.
+  """
+
+  user_options = install.install.user_options + [
+      # TODO(atash): remove this once manylinux gets on PyPI. See
+      # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
+      ('use-linux-bdist', None,
+       'Whether to retrieve a binary for Linux instead of building from '
+       'source.'),
+  ]
+
+  def initialize_options(self):
+    install.install.initialize_options(self)
+    self.use_linux_bdist = False
+
+  def finalize_options(self):
+    install.install.finalize_options(self)
+
+  def run(self):
+    if self.use_linux_bdist:
+      try:
+        egg_path = _get_linux_bdist_egg(self.egg_name(True),
+                                        self.egg_name(False))
+      except CommandError as error:
+        sys.stderr.write(
+            '\nWARNING: Failed to acquire grpcio prebuilt binary:\n'
+            '{}.\n\n'.format(error.message))
+        raise
+      try:
+        self._run_bdist_retrieval_install(egg_path)
+      except Exception as error:
+        # if anything else happens (and given how there's no way to really know
+        # what's happening in setuptools here, I mean *anything*), warn the user
+        # and fall back to building from source.
+        sys.stderr.write(
+            '{}\nWARNING: Failed to install grpcio prebuilt binary.\n\n'
+                .format(traceback.format_exc()))
+        install.install.run(self)
+    else:
+      install.install.run(self)
+
+  # TODO(atash): Remove this once PyPI has better Linux bdist support. See
+  # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
+  def _run_bdist_retrieval_install(self, bdist_egg):
+    easy_install = self.distribution.get_command_class('easy_install')
+    easy_install_command = easy_install(
+        self.distribution, args='x', root=self.root, record=self.record,
+    )
+    easy_install_command.ensure_finalized()
+    easy_install_command.always_copy_from = '.'
+    easy_install_command.package_index.scan(glob.glob('*.egg'))
+    arguments = [bdist_egg]
+    if setuptools.bootstrap_install_from:
+      args.insert(0, setuptools.bootstrap_install_from)
+    easy_install_command.args = arguments
+    easy_install_command.run()
+    setuptools.bootstrap_install_from = None
+
+
+class BdistEggCustomName(bdist_egg.bdist_egg, EggNameMixin):
+  """Thin wrapper around the bdist_egg command to build with our custom name."""
+
+  def run(self):
+    bdist_egg.bdist_egg.run(self)
+    target = os.path.join(self.dist_dir, '{}.egg'.format(self.egg_name(True)))
+    shutil.move(self.get_outputs()[0], target)
+
+
 class SphinxDocumentation(setuptools.Command):
   """Command to generate documentation via sphinx."""
 
diff --git a/src/python/grpcio/grpc/framework/foundation/logging_pool.py b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
index 7c7a6eebfca16b62f350d082c3d14672bc74e67d..f82c7f7fbaebf917f2e30cffd1a63ce5454f562c 100644
--- a/src/python/grpcio/grpc/framework/foundation/logging_pool.py
+++ b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,7 +29,6 @@
 
 """A thread pool that logs exceptions raised by tasks executed within it."""
 
-import functools
 import logging
 
 from concurrent import futures
@@ -37,12 +36,12 @@ from concurrent import futures
 
 def _wrap(behavior):
   """Wraps an arbitrary callable behavior in exception-logging."""
-  @functools.wraps(behavior)
   def _wrapping(*args, **kwargs):
     try:
       return behavior(*args, **kwargs)
     except Exception as e:
-      logging.exception('Unexpected exception from task run in logging pool!')
+      logging.exception(
+          'Unexpected exception from %s executed in logging pool!', behavior)
       raise
   return _wrapping
 
diff --git a/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
index 452802da6ab881b26edb00046f360a1598907a71..0521e1c102ace797f2f841a4ea2e3bd72e248bfe 100644
--- a/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,6 +29,7 @@
 
 """Tests for grpc.framework.foundation.logging_pool."""
 
+import threading
 import unittest
 
 from grpc.framework.foundation import logging_pool
@@ -36,6 +37,21 @@ from grpc.framework.foundation import logging_pool
 _POOL_SIZE = 16
 
 
+class _CallableObject(object):
+
+  def __init__(self):
+    self._lock = threading.Lock()
+    self._passed_values = []
+
+  def __call__(self, value):
+    with self._lock:
+      self._passed_values.append(value)
+
+  def passed_values(self):
+    with self._lock:
+      return tuple(self._passed_values)
+
+
 class LoggingPoolTest(unittest.TestCase):
 
   def testUpAndDown(self):
@@ -59,6 +75,14 @@ class LoggingPoolTest(unittest.TestCase):
 
     self.assertIsNotNone(raised_exception)
 
+  def testCallableObjectExecuted(self):
+    callable_object = _CallableObject()
+    passed_object = object()
+    with logging_pool.pool(_POOL_SIZE) as pool:
+      future = pool.submit(callable_object, passed_object)
+    self.assertIsNone(future.result())
+    self.assertSequenceEqual((passed_object,), callable_object.passed_values())
+
 
 if __name__ == '__main__':
   unittest.main(verbosity=2)
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
index 3bcefa601d01bd18b830285fd30f23c34e4f8ec9..c8a3a1bc7499ae6a8311eea5aed668901ef9b700 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -30,9 +30,12 @@
 """Test code for the Face layer of RPC Framework."""
 
 import abc
+import itertools
 import unittest
+from concurrent import futures
 
 # test_interfaces is referenced from specification in this module.
+from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.face import face
 from tests.unit.framework.common import test_constants
 from tests.unit.framework.common import test_control
@@ -139,13 +142,50 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
         test_messages.verify(second_request, second_response, self)
 
-  @unittest.skip('Parallel invocations impossible with blocking control flow!')
   def testParallelInvocations(self):
-    raise NotImplementedError()
+    pool = logging_pool.pool(test_constants.PARALLELISM)
+    for (group, method), test_messages_sequence in (
+        self._digest.unary_unary_messages_sequences.iteritems()):
+      for test_messages in test_messages_sequence:
+        requests = []
+        response_futures = []
+        for _ in range(test_constants.PARALLELISM):
+          request = test_messages.request()
+          response_future = pool.submit(
+              self._invoker.blocking(group, method), request,
+              test_constants.LONG_TIMEOUT)
+          requests.append(request)
+          response_futures.append(response_future)
+
+        responses = [
+            response_future.result() for response_future in response_futures]
+
+        for request, response in zip(requests, responses):
+          test_messages.verify(request, response, self)
+    pool.shutdown(wait=True)
 
-  @unittest.skip('Parallel invocations impossible with blocking control flow!')
   def testWaitingForSomeButNotAllParallelInvocations(self):
-    raise NotImplementedError()
+    pool = logging_pool.pool(test_constants.PARALLELISM)
+    for (group, method), test_messages_sequence in (
+        self._digest.unary_unary_messages_sequences.iteritems()):
+      for test_messages in test_messages_sequence:
+        requests = []
+        response_futures_to_indices = {}
+        for index in range(test_constants.PARALLELISM):
+          request = test_messages.request()
+          response_future = pool.submit(
+              self._invoker.blocking(group, method), request,
+              test_constants.LONG_TIMEOUT)
+          requests.append(request)
+          response_futures_to_indices[response_future] = index
+
+        some_completed_response_futures_iterator = itertools.islice(
+            futures.as_completed(response_futures_to_indices),
+            test_constants.PARALLELISM / 2)
+        for response_future in some_completed_response_futures_iterator:
+          index = response_futures_to_indices[response_future]
+          test_messages.verify(requests[index], response_future.result(), self)
+    pool.shutdown(wait=True)
 
   @unittest.skip('Cancellation impossible with blocking control flow!')
   def testCancelledUnaryRequestUnaryResponse(self):
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index fc8daa992fafab92de5217e7d52617086ecaaa6c..1d36a931e8c1f1384c63a8a1c200a2c6efc990ee 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -31,8 +31,10 @@
 
 import abc
 import contextlib
+import itertools
 import threading
 import unittest
+from concurrent import futures
 
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.foundation import logging_pool
@@ -219,6 +221,23 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
         test_messages.verify(second_request, second_response, self)
 
+  def testParallelInvocations(self):
+    for (group, method), test_messages_sequence in (
+        self._digest.unary_unary_messages_sequences.iteritems()):
+      for test_messages in test_messages_sequence:
+        first_request = test_messages.request()
+        second_request = test_messages.request()
+
+        first_response_future = self._invoker.future(group, method)(
+            first_request, test_constants.LONG_TIMEOUT)
+        second_response_future = self._invoker.future(group, method)(
+            second_request, test_constants.LONG_TIMEOUT)
+        first_response = first_response_future.result()
+        second_response = second_response_future.result()
+
+        test_messages.verify(first_request, first_response, self)
+        test_messages.verify(second_request, second_response, self)
+
     for (group, method), test_messages_sequence in (
         self._digest.unary_unary_messages_sequences.iteritems()):
       for test_messages in test_messages_sequence:
@@ -237,26 +256,28 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
         for request, response in zip(requests, responses):
           test_messages.verify(request, response, self)
 
-  def testParallelInvocations(self):
+  def testWaitingForSomeButNotAllParallelInvocations(self):
+    pool = logging_pool.pool(test_constants.PARALLELISM)
     for (group, method), test_messages_sequence in (
         self._digest.unary_unary_messages_sequences.iteritems()):
       for test_messages in test_messages_sequence:
-        first_request = test_messages.request()
-        second_request = test_messages.request()
-
-        first_response_future = self._invoker.future(group, method)(
-            first_request, test_constants.LONG_TIMEOUT)
-        second_response_future = self._invoker.future(group, method)(
-            second_request, test_constants.LONG_TIMEOUT)
-        first_response = first_response_future.result()
-        second_response = second_response_future.result()
-
-        test_messages.verify(first_request, first_response, self)
-        test_messages.verify(second_request, second_response, self)
-
-  @unittest.skip('TODO(nathaniel): implement.')
-  def testWaitingForSomeButNotAllParallelInvocations(self):
-    raise NotImplementedError()
+        requests = []
+        response_futures_to_indices = {}
+        for index in range(test_constants.PARALLELISM):
+          request = test_messages.request()
+          inner_response_future = self._invoker.future(group, method)(
+              request, test_constants.LONG_TIMEOUT)
+          outer_response_future = pool.submit(inner_response_future.result)
+          requests.append(request)
+          response_futures_to_indices[outer_response_future] = index
+
+        some_completed_response_futures_iterator = itertools.islice(
+            futures.as_completed(response_futures_to_indices),
+            test_constants.PARALLELISM / 2)
+        for response_future in some_completed_response_futures_iterator:
+          index = response_futures_to_indices[response_future]
+          test_messages.verify(requests[index], response_future.result(), self)
+    pool.shutdown(wait=True)
 
   def testCancelledUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
index 2e444ff09d95b72fb8faeb8a89f4d7cec51cc47c..42a7f4e3b80f5494f4c0f9ac072a5c2682a08eda 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -76,7 +76,7 @@ class Receiver(face.ResponseReceiver):
   def unary_response(self):
     with self._condition:
       if self._abortion is not None:
-        raise AssertionError('Aborted with abortion "%s"!' % self._abortion)
+        raise AssertionError('Aborted: "{}"!'.format(self._abortion))
       elif len(self._responses) != 1:
         raise AssertionError(
             '%d responses received, not exactly one!', len(self._responses))
@@ -88,7 +88,7 @@ class Receiver(face.ResponseReceiver):
       if self._abortion is None:
         return list(self._responses)
       else:
-        raise AssertionError('Aborted with abortion "%s"!' % self._abortion)
+        raise AssertionError('Aborted: "{}"!'.format(self._abortion))
 
   def abortion(self):
     with self._condition:
diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index 8f33d72417aebfe6fa2e0e6ec9b3640828e5365a..07864ebf599eea426b6e7707b0b72a2072425e4f 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.c
@@ -530,7 +530,8 @@ typedef struct run_batch_stack {
 
 /* grpc_run_batch_stack_init ensures the run_batch_stack is properly
  * initialized */
-static void grpc_run_batch_stack_init(run_batch_stack *st, unsigned write_flag) {
+static void grpc_run_batch_stack_init(run_batch_stack *st,
+                                      unsigned write_flag) {
   MEMZERO(st, run_batch_stack, 1);
   grpc_metadata_array_init(&st->send_metadata);
   grpc_metadata_array_init(&st->send_trailing_metadata);
diff --git a/src/zlib/gen_build_yaml.py b/src/zlib/gen_build_yaml.py
index 8d6064b10a5cd4d159ec5b13a8c049c45345a36c..4bd557367abd0926760c5c5e879060c341850b16 100755
--- a/src/zlib/gen_build_yaml.py
+++ b/src/zlib/gen_build_yaml.py
@@ -54,6 +54,7 @@ try:
   out['libs'] = [{
       'name': 'z',
       'zlib': True,
+      'defaults': 'zlib',
       'build': 'private',
       'language': 'c',
       'secure': 'no',
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 57a08151937863c442d4c649b3bff6995900f43d..1770d0f366356415c166dcd107e88b916c010ea3 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -209,9 +209,11 @@
   else
   CXXFLAGS += -std=c++0x
   endif
-  CFLAGS += -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
-  CXXFLAGS += -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
-  LDFLAGS += -g
+  % for arg in ['CFLAGS', 'CXXFLAGS', 'CPPFLAGS', 'LDFLAGS', 'DEFINES']:
+  %  if defaults.get('global', []).get(arg, None) is not None:
+  ${arg} += ${defaults.get('global').get(arg)}
+  %  endif
+  % endfor
 
   CPPFLAGS += $(CPPFLAGS_$(CONFIG))
   CFLAGS += $(CFLAGS_$(CONFIG))
@@ -352,20 +354,20 @@
   OPENSSL_LIBS = ssl crypto
   endif
 
-  OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
-  OPENSSL_NPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
-  ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
-  PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
+  OPENSSL_ALPN_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/openssl-alpn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
+  OPENSSL_NPN_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/openssl-npn.c $(addprefix -l, $(OPENSSL_LIBS)) $(LDFLAGS)
+  ZLIB_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
+  PROTOBUF_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
 
   endif # HAS_PKG_CONFIG
 
-  PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
+  PERFTOOLS_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 
   PROTOC_CHECK_CMD = which protoc > /dev/null
   PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
   DTRACE_CHECK_CMD = which dtrace > /dev/null
-  SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
-  ZOOKEEPER_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zookeeper.c $(LDFLAGS) -lzookeeper_mt
+  SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
+  ZOOKEEPER_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zookeeper.c $(LDFLAGS) -lzookeeper_mt
 
   ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
   HAS_SYSTEM_PERFTOOLS ?= $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true || echo false)
@@ -1198,12 +1200,12 @@
   $(OBJDIR)/$(CONFIG)/%.o : %.c
   	$(E) "[C]       Compiling $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(CC) $(CFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+  	$(Q) $(CC) $(CPPFLAGS) $(CFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
   $(OBJDIR)/$(CONFIG)/%.o : $(GENDIR)/%.pb.cc
   	$(E) "[CXX]     Compiling $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+  	$(Q) $(CXX) $(CPPFLAGS) $(CXXFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
   $(OBJDIR)/$(CONFIG)/src/compiler/%.o : src/compiler/%.cc
   	$(E) "[HOSTCXX] Compiling $<"
@@ -1213,7 +1215,7 @@
   $(OBJDIR)/$(CONFIG)/%.o : %.cc
   	$(E) "[CXX]     Compiling $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+  	$(Q) $(CXX) $(CPPFLAGS) $(CXXFLAGS) -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
 
   install: install_c install_cxx install-plugins install-certs verify-install
 
@@ -1435,16 +1437,10 @@
 
   LIB${lib.name.upper()}_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIB${lib.name.upper()}_SRC))))
 
-  % if lib.boringssl:
-  # boringssl needs an override to ensure that it does not include
-  # system openssl headers regardless of other configuration
-  # we do so here with a target specific variable assignment
-  $(LIB${lib.name.upper()}_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -fvisibility=hidden
-  $(LIB${lib.name.upper()}_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
-  $(LIB${lib.name.upper()}_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
-  % elif lib.zlib:
-  $(LIB${lib.name.upper()}_OBJS): CFLAGS := $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
-  % else:
+  % if lib.get('defaults', None):
+  %  for name, value in defaults.get(lib.defaults).iteritems():
+  $(LIB${lib.name.upper()}_OBJS): ${name} += ${value}
+  %  endfor
   % endif
 
   ## If the library requires OpenSSL, let's add some restrictions.
@@ -1504,7 +1500,10 @@
   else
 
   % endif
-  $(LIBDIR)/$(CONFIG)/lib${lib.name}.a: $(ZLIB_DEP) $(OPENSSL_DEP) \
+  $(LIBDIR)/$(CONFIG)/lib${lib.name}.a: \
+  % if lib.name != 'z':
+  $(ZLIB_DEP) \
+  % endif
   % endif
   % if lib.language == 'c++':
    $(PROTOBUF_DEP)\
@@ -1789,7 +1788,7 @@
   $(OBJDIR)/$(CONFIG)/${os.path.splitext(src)[0]}.o : ${src}
   	$(E) "[C]       Compiling $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(CC) $(CFLAGS) $(CPPFLAGS) -std=c89 -pedantic -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
+  	$(Q) $(CC) $(CPPFLAGS) $(CFLAGS) -std=c89 -pedantic -MMD -MF $(addsuffix .dep, $(basename $@)) -c -o $@ $<
   % endfor
   % endif
 
diff --git a/templates/gRPC.podspec.template b/templates/gRPC.podspec.template
index 67fc8f66025747484c12796e90c85f5d245f799f..a9948a41df4615f8219338bb6241e5d15929ae65 100644
--- a/templates/gRPC.podspec.template
+++ b/templates/gRPC.podspec.template
@@ -97,7 +97,7 @@
 
       ss.requires_arc = false
       ss.libraries = 'z'
-      ss.dependency 'BoringSSL', '~> 1.0'
+      ss.dependency 'BoringSSL', '~> 2.0'
 
       # ss.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
     end
diff --git a/test/core/bad_client/bad_client.c b/test/core/bad_client/bad_client.c
index 832570a81da39e4da3b4fea0651f315370ee0ea5..1a2ca6f0c097879b550cd2e771e03148e4fe9fb9 100644
--- a/test/core/bad_client/bad_client.c
+++ b/test/core/bad_client/bad_client.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -60,7 +60,7 @@ static void thd_func(void *arg) {
   gpr_event_set(&a->done_thd, (void *)1);
 }
 
-static void done_write(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void done_write(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   thd_args *a = arg;
   gpr_event_set(&a->done_write, (void *)1);
 }
diff --git a/test/core/channel/channel_stack_test.c b/test/core/channel/channel_stack_test.c
index f1bb37c0bf4509a0750174e34ce1b7951ff9b6a9..e19e9a57aed91b65568f93345b6a845ffcc98b04 100644
--- a/test/core/channel/channel_stack_test.c
+++ b/test/core/channel/channel_stack_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,12 +81,12 @@ static char *get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
   return gpr_strdup("peer");
 }
 
-static void free_channel(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void free_channel(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_channel_stack_destroy(exec_ctx, arg);
   gpr_free(arg);
 }
 
-static void free_call(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void free_call(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_call_stack_destroy(exec_ctx, arg);
   gpr_free(arg);
 }
diff --git a/test/core/client_config/set_initial_connect_string_test.c b/test/core/client_config/set_initial_connect_string_test.c
index 33cab715b2a7387125c7b84538bdd71a30c71b41..bcd1f261235eae70012f85ea206731a9e1f3befd 100644
--- a/test/core/client_config/set_initial_connect_string_test.c
+++ b/test/core/client_config/set_initial_connect_string_test.c
@@ -64,7 +64,7 @@ static int server_port;
 static struct rpc_state state;
 static grpc_closure on_read;
 
-static void handle_read(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void handle_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   GPR_ASSERT(success);
   gpr_slice_buffer_move_into(&state.temp_incoming_buffer,
                              &state.incoming_buffer);
diff --git a/test/core/end2end/fixtures/h2_uchannel.c b/test/core/end2end/fixtures/h2_uchannel.c
index 9b622e80d6ef99faeb4ac34a998ed807005f407e..5ab64f9800bb411721494a932bb155a928fd06a6 100644
--- a/test/core/end2end/fixtures/h2_uchannel.c
+++ b/test/core/end2end/fixtures/h2_uchannel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,7 +81,7 @@ static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
   }
 }
 
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   connector *c = arg;
   grpc_closure *notify;
   grpc_endpoint *tcp = c->tcp;
@@ -240,7 +240,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_micro_fullstack(
 grpc_connectivity_state g_state = GRPC_CHANNEL_IDLE;
 grpc_pollset_set g_interested_parties;
 
-static void state_changed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void state_changed(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   if (g_state != GRPC_CHANNEL_READY) {
     grpc_subchannel_notify_on_state_change(
         exec_ctx, arg, &g_interested_parties, &g_state,
@@ -248,7 +248,7 @@ static void state_changed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_pollset_destroy(arg);
 }
 
diff --git a/test/core/httpcli/httpcli_test.c b/test/core/httpcli/httpcli_test.c
index 612388c61d7b5d212b0e5c08d3cf9abe543d79fd..651ef1fa3b8bfa70d584514935eed39decd2434c 100644
--- a/test/core/httpcli/httpcli_test.c
+++ b/test/core/httpcli/httpcli_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -131,7 +131,7 @@ static void test_post(int port) {
   gpr_free(host);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/httpcli/httpscli_test.c b/test/core/httpcli/httpscli_test.c
index ba5660bd187630ac2a99dffa51cc70afee31931c..db41be17e73b3cc86e269cb3b753256175c3b080 100644
--- a/test/core/httpcli/httpscli_test.c
+++ b/test/core/httpcli/httpscli_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -133,7 +133,7 @@ static void test_post(int port) {
   gpr_free(host);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/endpoint_pair_test.c b/test/core/iomgr/endpoint_pair_test.c
index ff590cf2d5ce00a159f6f13897e7d9e7616be652..7e266ebfb99bc8bd583984668dd8eedbf53640d7 100644
--- a/test/core/iomgr/endpoint_pair_test.c
+++ b/test/core/iomgr/endpoint_pair_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -65,7 +65,7 @@ static grpc_endpoint_test_config configs[] = {
     {"tcp/tcp_socketpair", create_fixture_endpoint_pair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/endpoint_tests.c b/test/core/iomgr/endpoint_tests.c
index a66fe32fdea1b992bad9880bf6bc1849f937e09a..1b6a78da9ac68aa561d698f8a07350ef487006ef 100644
--- a/test/core/iomgr/endpoint_tests.c
+++ b/test/core/iomgr/endpoint_tests.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -127,7 +127,7 @@ struct read_and_write_test_state {
 };
 
 static void read_and_write_test_read_handler(grpc_exec_ctx *exec_ctx,
-                                             void *data, int success) {
+                                             void *data, bool success) {
   struct read_and_write_test_state *state = data;
 
   state->bytes_read += count_slices(
@@ -145,7 +145,7 @@ static void read_and_write_test_read_handler(grpc_exec_ctx *exec_ctx,
 }
 
 static void read_and_write_test_write_handler(grpc_exec_ctx *exec_ctx,
-                                              void *data, int success) {
+                                              void *data, bool success) {
   struct read_and_write_test_state *state = data;
   gpr_slice *slices = NULL;
   size_t nslices;
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index b1865207291d1441eaf7c05501cd104f82762231..347a86af1084b60b8dace536b6225eb776ffb5f9 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -118,7 +118,7 @@ typedef struct {
 /* Called when an upload session can be safely shutdown.
    Close session FD and start to shutdown listen FD. */
 static void session_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
-                                int success) {
+                                bool success) {
   session *se = arg;
   server *sv = se->sv;
   grpc_fd_orphan(exec_ctx, se->em_fd, NULL, NULL, "a");
@@ -129,7 +129,7 @@ static void session_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
 
 /* Called when data become readable in a session. */
 static void session_read_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
-                            int success) {
+                            bool success) {
   session *se = arg;
   int fd = se->em_fd->fd;
 
@@ -187,7 +187,7 @@ static void listen_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg /*server */,
 
 /* Called when a new TCP connection request arrives in the listening port. */
 static void listen_cb(grpc_exec_ctx *exec_ctx, void *arg, /*=sv_arg*/
-                      int success) {
+                      bool success) {
   server *sv = arg;
   int fd;
   int flags;
@@ -301,7 +301,7 @@ static void client_session_shutdown_cb(grpc_exec_ctx *exec_ctx,
 
 /* Write as much as possible, then register notify_on_write. */
 static void client_session_write(grpc_exec_ctx *exec_ctx, void *arg, /*client */
-                                 int success) {
+                                 bool success) {
   client *cl = arg;
   int fd = cl->em_fd->fd;
   ssize_t write_once = 0;
@@ -399,7 +399,7 @@ static void test_grpc_fd(void) {
 }
 
 typedef struct fd_change_data {
-  void (*cb_that_ran)(grpc_exec_ctx *exec_ctx, void *, int success);
+  grpc_iomgr_cb_func cb_that_ran;
 } fd_change_data;
 
 void init_change_data(fd_change_data *fdc) { fdc->cb_that_ran = NULL; }
@@ -407,7 +407,7 @@ void init_change_data(fd_change_data *fdc) { fdc->cb_that_ran = NULL; }
 void destroy_change_data(fd_change_data *fdc) {}
 
 static void first_read_callback(grpc_exec_ctx *exec_ctx,
-                                void *arg /* fd_change_data */, int success) {
+                                void *arg /* fd_change_data */, bool success) {
   fd_change_data *fdc = arg;
 
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
@@ -417,7 +417,7 @@ static void first_read_callback(grpc_exec_ctx *exec_ctx,
 }
 
 static void second_read_callback(grpc_exec_ctx *exec_ctx,
-                                 void *arg /* fd_change_data */, int success) {
+                                 void *arg /* fd_change_data */, bool success) {
   fd_change_data *fdc = arg;
 
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
@@ -510,7 +510,7 @@ static void test_grpc_fd_change(void) {
   close(sv[1]);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index 833ceace540ec5bd16b8758e8f7c83eeefa5f62c..9725d8a3b6411de5798efb0ee95d4fb24584f63f 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -63,7 +63,7 @@ static void finish_connection() {
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
 }
 
-static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   GPR_ASSERT(g_connecting != NULL);
   GPR_ASSERT(success);
   grpc_endpoint_shutdown(exec_ctx, g_connecting);
@@ -72,7 +72,7 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
   finish_connection();
 }
 
-static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   GPR_ASSERT(g_connecting == NULL);
   GPR_ASSERT(!success);
   finish_connection();
@@ -258,7 +258,7 @@ void test_times_out(void) {
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.c
index e0136b3cd7590a459e3564f702561311d5efd2b3..d290c6bc3ab30ee718ed2e1df95d413a9f3f7191 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.c
@@ -138,7 +138,7 @@ static size_t count_slices(gpr_slice *slices, size_t nslices,
   return num_bytes;
 }
 
-static void read_cb(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
+static void read_cb(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   struct read_socket_state *state = (struct read_socket_state *)user_data;
   size_t read_bytes;
   int current_data;
@@ -280,7 +280,7 @@ static gpr_slice *allocate_blocks(size_t num_bytes, size_t slice_size,
 }
 
 static void write_done(grpc_exec_ctx *exec_ctx,
-                       void *user_data /* write_socket_state */, int success) {
+                       void *user_data /* write_socket_state */, bool success) {
   struct write_socket_state *state = (struct write_socket_state *)user_data;
   gpr_log(GPR_INFO, "Write done callback called");
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
@@ -383,7 +383,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-void on_fd_released(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+void on_fd_released(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   int *done = arg;
   *done = 1;
   grpc_pollset_kick(&g_pollset, NULL);
@@ -503,7 +503,7 @@ static grpc_endpoint_test_config configs[] = {
     {"tcp/tcp_socketpair", create_fixture_tcp_socketpair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index f7097ac904de8a4ffce57aab7ba1b1caa057ee52..272d97bfcbdb4dba106ea0265ed0a3d28e437676 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -86,7 +86,7 @@ static void on_connect_result_set(on_connect_result *result,
 }
 
 static void server_weak_ref_shutdown(grpc_exec_ctx *exec_ctx, void *arg,
-                                     int success) {
+                                     bool success) {
   server_weak_ref *weak_ref = arg;
   weak_ref->server = NULL;
 }
@@ -303,7 +303,7 @@ static void test_connect(unsigned n) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/iomgr/timer_list_test.c b/test/core/iomgr/timer_list_test.c
index 63014c3939ee6f0a7534b4cd3da3ed18ec79c4b7..15de87c5a1a4452ea57eb98350e8033f4df42ba4 100644
--- a/test/core/iomgr/timer_list_test.c
+++ b/test/core/iomgr/timer_list_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,7 +43,7 @@
 
 static int cb_called[MAX_CB][2];
 
-static void cb(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void cb(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   cb_called[(intptr_t)arg][success]++;
 }
 
diff --git a/test/core/iomgr/workqueue_test.c b/test/core/iomgr/workqueue_test.c
index d1f9dabc5749ced5f08d03e2242f14a6f95fcaad..500170b542ca325ff1eb9eb4e1b667678df0e04c 100644
--- a/test/core/iomgr/workqueue_test.c
+++ b/test/core/iomgr/workqueue_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,7 +40,7 @@
 
 static grpc_pollset g_pollset;
 
-static void must_succeed(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void must_succeed(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   GPR_ASSERT(success == 1);
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   *(int *)p = 1;
@@ -90,7 +90,7 @@ static void test_flush(void) {
   grpc_pollset_worker worker;
   grpc_closure_init(&c, must_succeed, &done);
 
-  grpc_exec_ctx_enqueue(&exec_ctx, &c, 1);
+  grpc_exec_ctx_enqueue(&exec_ctx, &c, true, NULL);
   grpc_workqueue_flush(&exec_ctx, wq);
   grpc_workqueue_add_to_pollset(&exec_ctx, wq, &g_pollset);
 
@@ -106,7 +106,7 @@ static void test_flush(void) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/security/oauth2_utils.c b/test/core/security/oauth2_utils.c
index fb62bf413470a328e1b6d04963c11cbc59d2908c..55ac31e62ca7915964b67af77ecc348d832a04e5 100644
--- a/test/core/security/oauth2_utils.c
+++ b/test/core/security/oauth2_utils.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -73,7 +73,7 @@ static void on_oauth2_response(grpc_exec_ctx *exec_ctx, void *user_data,
   gpr_mu_unlock(GRPC_POLLSET_MU(&request->pollset));
 }
 
-static void do_nothing(grpc_exec_ctx *exec_ctx, void *unused, int success) {}
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *unused, bool success) {}
 
 char *grpc_test_fetch_oauth2_token_with_credentials(
     grpc_call_credentials *creds) {
diff --git a/test/core/security/secure_endpoint_test.c b/test/core/security/secure_endpoint_test.c
index 240c4596b4eac7f56229c7b67de2bd357bc963db..fb4bd30e2dfe4c9144ddabb7eb879447d2bd03c9 100644
--- a/test/core/security/secure_endpoint_test.c
+++ b/test/core/security/secure_endpoint_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -138,7 +138,7 @@ static grpc_endpoint_test_config configs[] = {
      secure_endpoint_create_fixture_tcp_socketpair_leftover, clean_up},
 };
 
-static void inc_call_ctr(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void inc_call_ctr(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   ++*(int *)arg;
 }
 
@@ -171,7 +171,7 @@ static void test_leftover(grpc_endpoint_test_config config, size_t slice_size) {
   clean_up();
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }
 
diff --git a/test/core/support/alloc_test.c b/test/core/support/alloc_test.c
index a7051a46a1013aaf7fb134db6e0a8e82cd468f6f..6bdba8c3907131d90623f223ee9cc851f3b74dd6 100644
--- a/test/core/support/alloc_test.c
+++ b/test/core/support/alloc_test.c
@@ -39,7 +39,9 @@ static void *fake_malloc(size_t size) { return (void *)size; }
 
 static void *fake_realloc(void *addr, size_t size) { return (void *)size; }
 
-static void fake_free(void *addr) { *((intptr_t *)addr) = 0xdeadd00d; }
+static void fake_free(void *addr) {
+  *((intptr_t *)addr) = (intptr_t)0xdeadd00d;
+}
 
 static void test_custom_allocs() {
   const gpr_allocation_functions default_fns = gpr_get_allocation_functions();
@@ -52,7 +54,7 @@ static void test_custom_allocs() {
   GPR_ASSERT((void *)(size_t)0xcafed00d == gpr_realloc(0, 0xcafed00d));
 
   gpr_free(&addr_to_free);
-  GPR_ASSERT(addr_to_free == 0xdeadd00d);
+  GPR_ASSERT(addr_to_free == (intptr_t)0xdeadd00d);
 
   /* Restore and check we don't get funky values and that we don't leak */
   gpr_set_allocation_functions(default_fns);
diff --git a/test/core/surface/lame_client_test.c b/test/core/surface/lame_client_test.c
index e03cce1322ded1267198413738563d5ce9cbdf64..79e53cb4222aa46da17d8227cf510eb81b914b93 100644
--- a/test/core/surface/lame_client_test.c
+++ b/test/core/surface/lame_client_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,13 +47,13 @@ grpc_closure transport_op_cb;
 
 static void *tag(intptr_t x) { return (void *)x; }
 
-void verify_connectivity(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+void verify_connectivity(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   grpc_transport_op *op = arg;
   GPR_ASSERT(GRPC_CHANNEL_FATAL_FAILURE == *op->connectivity_state);
   GPR_ASSERT(success);
 }
 
-void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, int success) {}
+void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, bool success) {}
 
 void test_transport_op(grpc_channel *channel) {
   grpc_transport_op op;
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 1e1524d098d759e025bf5ab020ed65bc0042c312..579faa44411f94584da216148031f3b440ebad98 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -37,6 +37,21 @@
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
+#include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/atm.h>
+#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/compression_types.h>
+#include <grpc/impl/codegen/connectivity_state.h>
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/impl/codegen/log.h>
+#include <grpc/impl/codegen/port_platform.h>
+#include <grpc/impl/codegen/propagation_bits.h>
+#include <grpc/impl/codegen/slice.h>
+#include <grpc/impl/codegen/slice_buffer.h>
+#include <grpc/impl/codegen/status.h>
+#include <grpc/impl/codegen/sync.h>
+#include <grpc/impl/codegen/sync_generic.h>
+#include <grpc/impl/codegen/time.h>
 #include <grpc/status.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
diff --git a/test/core/transport/chttp2/hpack_table_test.c b/test/core/transport/chttp2/hpack_table_test.c
index 39f4174eec405260a1f521bf86f99440252aedf1..3c5f2e4e3144b62590581b196a921f3c6affd4f4 100644
--- a/test/core/transport/chttp2/hpack_table_test.c
+++ b/test/core/transport/chttp2/hpack_table_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -236,7 +236,7 @@ static void test_find(void) {
 
   /* overflow the string buffer, check find still works */
   for (i = 0; i < 10000; i++) {
-    gpr_ltoa(i, buffer);
+    int64_ttoa(i, buffer);
     elem = grpc_mdelem_from_strings("test", buffer);
     GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem));
     GRPC_MDELEM_UNREF(elem);
@@ -256,7 +256,7 @@ static void test_find(void) {
 
   for (i = 0; i < tbl.num_ents; i++) {
     uint32_t expect = 9999 - i;
-    gpr_ltoa(expect, buffer);
+    int64_ttoa(expect, buffer);
 
     r = find_simple(&tbl, "test", buffer);
     GPR_ASSERT(r.index == i + 1 + GRPC_CHTTP2_LAST_STATIC_ENTRY);
diff --git a/test/core/transport/connectivity_state_test.c b/test/core/transport/connectivity_state_test.c
index 34ab45d260b22afdbaf0cc02ecdd044e415a89ea..4b2d0aa44a07eca79745b8a4d4b073c1473e7fd3 100644
--- a/test/core/transport/connectivity_state_test.c
+++ b/test/core/transport/connectivity_state_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,13 +43,13 @@
 
 int g_counter;
 
-static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   GPR_ASSERT(success);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
 }
 
-static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   GPR_ASSERT(!success);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
diff --git a/test/core/util/port_posix.c b/test/core/util/port_posix.c
index 732a51c5cbdf9cf84e05e955e792bcf4f15e6a5b..4b31f810e59a4b177da27e4025071461faf7eb29 100644
--- a/test/core/util/port_posix.c
+++ b/test/core/util/port_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,11 +37,12 @@
 
 #include "test/core/util/port.h"
 
+#include <errno.h>
+#include <math.h>
 #include <netinet/in.h>
-#include <sys/socket.h>
 #include <stdio.h>
-#include <errno.h>
 #include <string.h>
+#include <sys/socket.h>
 #include <unistd.h>
 
 #include <grpc/grpc.h>
@@ -73,7 +74,7 @@ typedef struct freereq {
 } freereq;
 
 static void destroy_pollset_and_shutdown(grpc_exec_ctx *exec_ctx, void *p,
-                                         int success) {
+                                         bool success) {
   grpc_pollset_destroy(p);
   grpc_shutdown();
 }
@@ -229,10 +230,10 @@ static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
     grpc_httpcli_request req;
     memset(&req, 0, sizeof(req));
     GPR_ASSERT(pr->retries < 10);
+    sleep(1 + (unsigned)(pow(1.3, pr->retries) * rand() / RAND_MAX));
     pr->retries++;
     req.host = pr->server;
     req.path = "/get";
-    sleep(1);
     grpc_httpcli_get(exec_ctx, pr->ctx, &pr->pollset, &req,
                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
                      pr);
diff --git a/test/core/util/port_windows.c b/test/core/util/port_windows.c
index 60ad9b4f2ae70f847bf509610a2683ef57a41f6c..85d7c0ce07764f9670c0943dd11d7ef70fa3db7a 100644
--- a/test/core/util/port_windows.c
+++ b/test/core/util/port_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -152,7 +152,7 @@ static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
 }
 
 static void destroy_pollset_and_shutdown(grpc_exec_ctx *exec_ctx, void *p,
-                                         int success) {
+                                         bool success) {
   grpc_pollset_destroy(p);
   grpc_shutdown();
 }
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.c
index aaba7be356914c01b025ae92b4bda56d4008eb64..66470c028869f0d31f531bed1428265f82a1e495 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.c
@@ -46,7 +46,7 @@
 #include "test/core/util/port.h"
 
 static void on_server_destroyed(grpc_exec_ctx *exec_ctx, void *data,
-                                int success) {
+                                bool success) {
   test_tcp_server *server = data;
   server->shutdown = 1;
 }
@@ -97,7 +97,7 @@ void test_tcp_server_poll(test_tcp_server *server, int seconds) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, int success) {}
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, bool success) {}
 
 void test_tcp_server_destroy(test_tcp_server *server) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
diff --git a/test/cpp/common/alarm_test.cc b/test/cpp/common/alarm_test.cc
index d41a25a63c84892b95c05112e78b8f8089a0a9d2..09df6852a512954f923146c656bc36a90fe85d87 100644
--- a/test/cpp/common/alarm_test.cc
+++ b/test/cpp/common/alarm_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,7 @@
 #include <grpc++/completion_queue.h>
 #include <gtest/gtest.h>
 
+#include <grpc++/completion_queue.h>
 #include "test/core/util/test_config.h"
 
 namespace grpc {
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index cfda571326bac428712935f4ef5200f4ecd7918d..0616cc07eeb6b882ebe906a0fa4ce679b9396426 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -180,21 +180,11 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
     int port = grpc_pick_unused_port_or_die();
     server_address_ << "localhost:" << port;
 
-    // It is currently unsupported to mix sync and async services
-    // in the same server, so first test that (for coverage)
-    ServerBuilder build_bad;
-    build_bad.AddListeningPort(server_address_.str(),
-                               grpc::InsecureServerCredentials());
-    build_bad.RegisterAsyncService(&service_);
-    grpc::testing::EchoTestService::Service sync_service;
-    build_bad.RegisterService(&sync_service);
-    GPR_ASSERT(build_bad.BuildAndStart() == nullptr);
-
     // Setup server
     ServerBuilder builder;
     builder.AddListeningPort(server_address_.str(),
                              grpc::InsecureServerCredentials());
-    builder.RegisterAsyncService(&service_);
+    builder.RegisterService(&service_);
     cq_ = builder.AddCompletionQueue();
     server_ = builder.BuildAndStart();
   }
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index f8027bcf0b554d14805da003b4290c4247d8a195..5a414ebc86c114317824906d6babf03d05c4f48c 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -244,7 +244,8 @@ class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
           gpr_time_from_micros(request->param().server_cancel_after_us(),
                                GPR_TIMESPAN)));
       return Status::CANCELLED;
-    } else {
+    } else if (!request->has_param() ||
+               !request->param().skip_cancelled_check()) {
       EXPECT_FALSE(context->IsCancelled());
     }
 
@@ -823,6 +824,7 @@ TEST_P(ProxyEnd2endTest, RpcDeadlineExpires) {
   EchoRequest request;
   EchoResponse response;
   request.set_message("Hello");
+  request.mutable_param()->set_skip_cancelled_check(true);
 
   ClientContext context;
   std::chrono::system_clock::time_point deadline =
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index c5d9de3f2944f2de60b685d1ff4f57b0a798eb6f..4e6d50ea80f0744e8f963342b688f63b9faccb84 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -51,6 +51,7 @@
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
+#include "test/cpp/util/byte_buffer_proto_helper.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -70,29 +71,9 @@ void verify_ok(CompletionQueue* cq, int i, bool expect_ok) {
   EXPECT_EQ(tag(i), got_tag);
 }
 
-bool ParseFromByteBuffer(ByteBuffer* buffer, grpc::protobuf::Message* message) {
-  std::vector<Slice> slices;
-  buffer->Dump(&slices);
-  grpc::string buf;
-  buf.reserve(buffer->Length());
-  for (auto s = slices.begin(); s != slices.end(); s++) {
-    buf.append(reinterpret_cast<const char*>(s->begin()), s->size());
-  }
-  return message->ParseFromString(buf);
-}
-
-std::unique_ptr<ByteBuffer> SerializeToByteBuffer(
-    grpc::protobuf::Message* message) {
-  grpc::string buf;
-  message->SerializeToString(&buf);
-  gpr_slice s = gpr_slice_from_copied_string(buf.c_str());
-  Slice slice(s, Slice::STEAL_REF);
-  return std::unique_ptr<ByteBuffer>(new ByteBuffer(&slice, 1));
-}
-
 class GenericEnd2endTest : public ::testing::Test {
  protected:
-  GenericEnd2endTest() : generic_service_("*"), server_host_("localhost") {}
+  GenericEnd2endTest() : server_host_("localhost") {}
 
   void SetUp() GRPC_OVERRIDE {
     int port = grpc_pick_unused_port_or_die();
diff --git a/test/cpp/end2end/hybrid_end2end_test.cc b/test/cpp/end2end/hybrid_end2end_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f8405627f9f7f52a5199f7f1a13f239fb4291d25
--- /dev/null
+++ b/test/cpp/end2end/hybrid_end2end_test.cc
@@ -0,0 +1,556 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <memory>
+#include <thread>
+
+#include <grpc++/channel.h>
+#include <grpc++/client_context.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/generic/async_generic_service.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <gtest/gtest.h>
+
+#include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+#include "test/cpp/end2end/test_service_impl.h"
+#include "test/cpp/util/byte_buffer_proto_helper.h"
+
+namespace grpc {
+namespace testing {
+
+namespace {
+
+void* tag(int i) { return (void*)(intptr_t)i; }
+
+bool VerifyReturnSuccess(CompletionQueue* cq, int i) {
+  void* got_tag;
+  bool ok;
+  EXPECT_TRUE(cq->Next(&got_tag, &ok));
+  EXPECT_EQ(tag(i), got_tag);
+  return ok;
+}
+
+void Verify(CompletionQueue* cq, int i, bool expect_ok) {
+  EXPECT_EQ(expect_ok, VerifyReturnSuccess(cq, i));
+}
+
+// Handlers to handle async request at a server. To be run in a separate thread.
+template <class Service>
+void HandleEcho(Service* service, ServerCompletionQueue* cq, bool dup_service) {
+  ServerContext srv_ctx;
+  grpc::ServerAsyncResponseWriter<EchoResponse> response_writer(&srv_ctx);
+  EchoRequest recv_request;
+  EchoResponse send_response;
+  service->RequestEcho(&srv_ctx, &recv_request, &response_writer, cq, cq,
+                       tag(1));
+  Verify(cq, 1, true);
+  send_response.set_message(recv_request.message());
+  if (dup_service) {
+    send_response.mutable_message()->append("_dup");
+  }
+  response_writer.Finish(send_response, Status::OK, tag(2));
+  Verify(cq, 2, true);
+}
+
+template <class Service>
+void HandleClientStreaming(Service* service, ServerCompletionQueue* cq) {
+  ServerContext srv_ctx;
+  EchoRequest recv_request;
+  EchoResponse send_response;
+  ServerAsyncReader<EchoResponse, EchoRequest> srv_stream(&srv_ctx);
+  service->RequestRequestStream(&srv_ctx, &srv_stream, cq, cq, tag(1));
+  Verify(cq, 1, true);
+  int i = 1;
+  do {
+    i++;
+    send_response.mutable_message()->append(recv_request.message());
+    srv_stream.Read(&recv_request, tag(i));
+  } while (VerifyReturnSuccess(cq, i));
+  srv_stream.Finish(send_response, Status::OK, tag(100));
+  Verify(cq, 100, true);
+}
+
+template <class Service>
+void HandleServerStreaming(Service* service, ServerCompletionQueue* cq) {
+  ServerContext srv_ctx;
+  EchoRequest recv_request;
+  EchoResponse send_response;
+  ServerAsyncWriter<EchoResponse> srv_stream(&srv_ctx);
+  service->RequestResponseStream(&srv_ctx, &recv_request, &srv_stream, cq, cq,
+                                 tag(1));
+  Verify(cq, 1, true);
+  send_response.set_message(recv_request.message() + "0");
+  srv_stream.Write(send_response, tag(2));
+  Verify(cq, 2, true);
+  send_response.set_message(recv_request.message() + "1");
+  srv_stream.Write(send_response, tag(3));
+  Verify(cq, 3, true);
+  send_response.set_message(recv_request.message() + "2");
+  srv_stream.Write(send_response, tag(4));
+  Verify(cq, 4, true);
+  srv_stream.Finish(Status::OK, tag(5));
+  Verify(cq, 5, true);
+}
+
+void HandleGenericEcho(GenericServerAsyncReaderWriter* stream,
+                       CompletionQueue* cq) {
+  ByteBuffer recv_buffer;
+  stream->Read(&recv_buffer, tag(2));
+  Verify(cq, 2, true);
+  EchoRequest recv_request;
+  EXPECT_TRUE(ParseFromByteBuffer(&recv_buffer, &recv_request));
+  EchoResponse send_response;
+  send_response.set_message(recv_request.message());
+  auto send_buffer = SerializeToByteBuffer(&send_response);
+  stream->Write(*send_buffer, tag(3));
+  Verify(cq, 3, true);
+  stream->Finish(Status::OK, tag(4));
+  Verify(cq, 4, true);
+}
+
+void HandleGenericRequestStream(GenericServerAsyncReaderWriter* stream,
+                                CompletionQueue* cq) {
+  ByteBuffer recv_buffer;
+  EchoRequest recv_request;
+  EchoResponse send_response;
+  int i = 1;
+  while (true) {
+    i++;
+    stream->Read(&recv_buffer, tag(i));
+    if (!VerifyReturnSuccess(cq, i)) {
+      break;
+    }
+    EXPECT_TRUE(ParseFromByteBuffer(&recv_buffer, &recv_request));
+    send_response.mutable_message()->append(recv_request.message());
+  }
+  auto send_buffer = SerializeToByteBuffer(&send_response);
+  stream->Write(*send_buffer, tag(99));
+  Verify(cq, 99, true);
+  stream->Finish(Status::OK, tag(100));
+  Verify(cq, 100, true);
+}
+
+// Request and handle one generic call.
+void HandleGenericCall(AsyncGenericService* service,
+                       ServerCompletionQueue* cq) {
+  GenericServerContext srv_ctx;
+  GenericServerAsyncReaderWriter stream(&srv_ctx);
+  service->RequestCall(&srv_ctx, &stream, cq, cq, tag(1));
+  Verify(cq, 1, true);
+  if (srv_ctx.method() == "/grpc.testing.EchoTestService/Echo") {
+    HandleGenericEcho(&stream, cq);
+  } else if (srv_ctx.method() ==
+             "/grpc.testing.EchoTestService/RequestStream") {
+    HandleGenericRequestStream(&stream, cq);
+  } else {  // other methods not handled yet.
+    gpr_log(GPR_ERROR, "method: %s", srv_ctx.method().c_str());
+    GPR_ASSERT(0);
+  }
+}
+
+class TestServiceImplDupPkg
+    : public ::grpc::testing::duplicate::EchoTestService::Service {
+ public:
+  Status Echo(ServerContext* context, const EchoRequest* request,
+              EchoResponse* response) GRPC_OVERRIDE {
+    response->set_message(request->message() + "_dup");
+    return Status::OK;
+  }
+};
+
+class HybridEnd2endTest : public ::testing::Test {
+ protected:
+  HybridEnd2endTest() {}
+
+  void SetUpServer(::grpc::Service* service1, ::grpc::Service* service2,
+                   AsyncGenericService* generic_service) {
+    int port = grpc_pick_unused_port_or_die();
+    server_address_ << "localhost:" << port;
+
+    // Setup server
+    ServerBuilder builder;
+    builder.AddListeningPort(server_address_.str(),
+                             grpc::InsecureServerCredentials());
+    builder.RegisterService(service1);
+    if (service2) {
+      builder.RegisterService(service2);
+    }
+    if (generic_service) {
+      builder.RegisterAsyncGenericService(generic_service);
+    }
+    // Create a separate cq for each potential handler.
+    for (int i = 0; i < 5; i++) {
+      cqs_.push_back(std::move(builder.AddCompletionQueue()));
+    }
+    server_ = builder.BuildAndStart();
+  }
+
+  void TearDown() GRPC_OVERRIDE {
+    if (server_) {
+      server_->Shutdown();
+    }
+    void* ignored_tag;
+    bool ignored_ok;
+    for (auto it = cqs_.begin(); it != cqs_.end(); ++it) {
+      (*it)->Shutdown();
+      while ((*it)->Next(&ignored_tag, &ignored_ok))
+        ;
+    }
+  }
+
+  void ResetStub() {
+    std::shared_ptr<Channel> channel =
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
+    stub_ = grpc::testing::EchoTestService::NewStub(channel);
+  }
+
+  // Test all rpc methods.
+  void TestAllMethods() {
+    SendEcho();
+    SendSimpleClientStreaming();
+    SendSimpleServerStreaming();
+    SendBidiStreaming();
+  }
+
+  void SendEcho() {
+    EchoRequest send_request;
+    EchoResponse recv_response;
+    ClientContext cli_ctx;
+    send_request.set_message("Hello");
+    Status recv_status = stub_->Echo(&cli_ctx, send_request, &recv_response);
+    EXPECT_EQ(send_request.message(), recv_response.message());
+    EXPECT_TRUE(recv_status.ok());
+  }
+
+  void SendEchoToDupService() {
+    std::shared_ptr<Channel> channel =
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
+    auto stub = grpc::testing::duplicate::EchoTestService::NewStub(channel);
+    EchoRequest send_request;
+    EchoResponse recv_response;
+    ClientContext cli_ctx;
+    send_request.set_message("Hello");
+    Status recv_status = stub->Echo(&cli_ctx, send_request, &recv_response);
+    EXPECT_EQ(send_request.message() + "_dup", recv_response.message());
+    EXPECT_TRUE(recv_status.ok());
+  }
+
+  void SendSimpleClientStreaming() {
+    EchoRequest send_request;
+    EchoResponse recv_response;
+    grpc::string expected_message;
+    ClientContext cli_ctx;
+    send_request.set_message("Hello");
+    auto stream = stub_->RequestStream(&cli_ctx, &recv_response);
+    for (int i = 0; i < 5; i++) {
+      EXPECT_TRUE(stream->Write(send_request));
+      expected_message.append(send_request.message());
+    }
+    stream->WritesDone();
+    Status recv_status = stream->Finish();
+    EXPECT_EQ(expected_message, recv_response.message());
+    EXPECT_TRUE(recv_status.ok());
+  }
+
+  void SendSimpleServerStreaming() {
+    EchoRequest request;
+    EchoResponse response;
+    ClientContext context;
+    request.set_message("hello");
+
+    auto stream = stub_->ResponseStream(&context, request);
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message() + "0");
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message() + "1");
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message() + "2");
+    EXPECT_FALSE(stream->Read(&response));
+
+    Status s = stream->Finish();
+    EXPECT_TRUE(s.ok());
+  }
+
+  void SendBidiStreaming() {
+    EchoRequest request;
+    EchoResponse response;
+    ClientContext context;
+    grpc::string msg("hello");
+
+    auto stream = stub_->BidiStream(&context);
+
+    request.set_message(msg + "0");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    request.set_message(msg + "1");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    request.set_message(msg + "2");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    stream->WritesDone();
+    EXPECT_FALSE(stream->Read(&response));
+    EXPECT_FALSE(stream->Read(&response));
+
+    Status s = stream->Finish();
+    EXPECT_TRUE(s.ok());
+  }
+
+  std::vector<std::unique_ptr<ServerCompletionQueue> > cqs_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
+  std::unique_ptr<Server> server_;
+  std::ostringstream server_address_;
+};
+
+TEST_F(HybridEnd2endTest, AsyncEcho) {
+  EchoTestService::WithAsyncMethod_Echo<TestServiceImpl> service;
+  SetUpServer(&service, nullptr, nullptr);
+  ResetStub();
+  std::thread echo_handler_thread(
+      [this, &service] { HandleEcho(&service, cqs_[0].get(), false); });
+  TestAllMethods();
+  echo_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, AsyncEchoRequestStream) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithAsyncMethod_Echo<TestServiceImpl> > service;
+  SetUpServer(&service, nullptr, nullptr);
+  ResetStub();
+  std::thread echo_handler_thread(
+      [this, &service] { HandleEcho(&service, cqs_[0].get(), false); });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  TestAllMethods();
+  echo_handler_thread.join();
+  request_stream_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, AsyncRequestStreamResponseStream) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> >
+      service;
+  SetUpServer(&service, nullptr, nullptr);
+  ResetStub();
+  std::thread response_stream_handler_thread(
+      [this, &service] { HandleServerStreaming(&service, cqs_[0].get()); });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  TestAllMethods();
+  response_stream_handler_thread.join();
+  request_stream_handler_thread.join();
+}
+
+// Add a second service with one sync method.
+TEST_F(HybridEnd2endTest, AsyncRequestStreamResponseStream_SyncDupService) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> >
+      service;
+  TestServiceImplDupPkg dup_service;
+  SetUpServer(&service, &dup_service, nullptr);
+  ResetStub();
+  std::thread response_stream_handler_thread(
+      [this, &service] { HandleServerStreaming(&service, cqs_[0].get()); });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  TestAllMethods();
+  SendEchoToDupService();
+  response_stream_handler_thread.join();
+  request_stream_handler_thread.join();
+}
+
+// Add a second service with one async method.
+TEST_F(HybridEnd2endTest, AsyncRequestStreamResponseStream_AsyncDupService) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> >
+      service;
+  duplicate::EchoTestService::AsyncService dup_service;
+  SetUpServer(&service, &dup_service, nullptr);
+  ResetStub();
+  std::thread response_stream_handler_thread(
+      [this, &service] { HandleServerStreaming(&service, cqs_[0].get()); });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  std::thread echo_handler_thread(
+      [this, &dup_service] { HandleEcho(&dup_service, cqs_[2].get(), true); });
+  TestAllMethods();
+  SendEchoToDupService();
+  response_stream_handler_thread.join();
+  request_stream_handler_thread.join();
+  echo_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, GenericEcho) {
+  EchoTestService::WithGenericMethod_Echo<TestServiceImpl> service;
+  AsyncGenericService generic_service;
+  SetUpServer(&service, nullptr, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  TestAllMethods();
+  generic_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, GenericEchoAsyncRequestStream) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<TestServiceImpl> > service;
+  AsyncGenericService generic_service;
+  SetUpServer(&service, nullptr, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  TestAllMethods();
+  generic_handler_thread.join();
+  request_stream_handler_thread.join();
+}
+
+// Add a second service with one sync method.
+TEST_F(HybridEnd2endTest, GenericEchoAsyncRequestStream_SyncDupService) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<TestServiceImpl> > service;
+  AsyncGenericService generic_service;
+  TestServiceImplDupPkg dup_service;
+  SetUpServer(&service, &dup_service, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  TestAllMethods();
+  SendEchoToDupService();
+  generic_handler_thread.join();
+  request_stream_handler_thread.join();
+}
+
+// Add a second service with one async method.
+TEST_F(HybridEnd2endTest, GenericEchoAsyncRequestStream_AsyncDupService) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<TestServiceImpl> > service;
+  AsyncGenericService generic_service;
+  duplicate::EchoTestService::AsyncService dup_service;
+  SetUpServer(&service, &dup_service, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  std::thread echo_handler_thread(
+      [this, &dup_service] { HandleEcho(&dup_service, cqs_[2].get(), true); });
+  TestAllMethods();
+  SendEchoToDupService();
+  generic_handler_thread.join();
+  request_stream_handler_thread.join();
+  echo_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, GenericEchoAsyncRequestStreamResponseStream) {
+  EchoTestService::WithAsyncMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<
+          EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> > >
+      service;
+  AsyncGenericService generic_service;
+  SetUpServer(&service, nullptr, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  std::thread request_stream_handler_thread(
+      [this, &service] { HandleClientStreaming(&service, cqs_[1].get()); });
+  std::thread response_stream_handler_thread(
+      [this, &service] { HandleServerStreaming(&service, cqs_[2].get()); });
+  TestAllMethods();
+  generic_handler_thread.join();
+  request_stream_handler_thread.join();
+  response_stream_handler_thread.join();
+}
+
+TEST_F(HybridEnd2endTest, GenericEchoRequestStreamAsyncResponseStream) {
+  EchoTestService::WithGenericMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<
+          EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> > >
+      service;
+  AsyncGenericService generic_service;
+  SetUpServer(&service, nullptr, &generic_service);
+  ResetStub();
+  std::thread generic_handler_thread([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[0].get());
+  });
+  std::thread generic_handler_thread2([this, &generic_service] {
+    HandleGenericCall(&generic_service, cqs_[1].get());
+  });
+  std::thread response_stream_handler_thread(
+      [this, &service] { HandleServerStreaming(&service, cqs_[2].get()); });
+  TestAllMethods();
+  generic_handler_thread.join();
+  generic_handler_thread2.join();
+  response_stream_handler_thread.join();
+}
+
+// If WithGenericMethod is called and no generic service is registered, the
+// server will fail to build.
+TEST_F(HybridEnd2endTest, GenericMethodWithoutGenericService) {
+  EchoTestService::WithGenericMethod_RequestStream<
+      EchoTestService::WithGenericMethod_Echo<
+          EchoTestService::WithAsyncMethod_ResponseStream<TestServiceImpl> > >
+      service;
+  SetUpServer(&service, nullptr, nullptr);
+  EXPECT_EQ(nullptr, server_.get());
+}
+
+}  // namespace
+}  // namespace testing
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/cpp/end2end/test_service_impl.cc b/test/cpp/end2end/test_service_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c9a32ecf5af65102d51bd49e7a2fe697cc111095
--- /dev/null
+++ b/test/cpp/end2end/test_service_impl.cc
@@ -0,0 +1,199 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/end2end/test_service_impl.h"
+
+#include <grpc++/security/credentials.h>
+#include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <gtest/gtest.h>
+
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/cpp/util/string_ref_helper.h"
+
+using std::chrono::system_clock;
+
+namespace grpc {
+namespace testing {
+namespace {
+
+// When echo_deadline is requested, deadline seen in the ServerContext is set in
+// the response in seconds.
+void MaybeEchoDeadline(ServerContext* context, const EchoRequest* request,
+                       EchoResponse* response) {
+  if (request->has_param() && request->param().echo_deadline()) {
+    gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_REALTIME);
+    if (context->deadline() != system_clock::time_point::max()) {
+      Timepoint2Timespec(context->deadline(), &deadline);
+    }
+    response->mutable_param()->set_request_deadline(deadline.tv_sec);
+  }
+}
+
+void CheckServerAuthContext(const ServerContext* context,
+                            const grpc::string& expected_client_identity) {
+  std::shared_ptr<const AuthContext> auth_ctx = context->auth_context();
+  std::vector<grpc::string_ref> ssl =
+      auth_ctx->FindPropertyValues("transport_security_type");
+  EXPECT_EQ(1u, ssl.size());
+  EXPECT_EQ("ssl", ToString(ssl[0]));
+  if (expected_client_identity.length() == 0) {
+    EXPECT_TRUE(auth_ctx->GetPeerIdentityPropertyName().empty());
+    EXPECT_TRUE(auth_ctx->GetPeerIdentity().empty());
+    EXPECT_FALSE(auth_ctx->IsPeerAuthenticated());
+  } else {
+    auto identity = auth_ctx->GetPeerIdentity();
+    EXPECT_TRUE(auth_ctx->IsPeerAuthenticated());
+    EXPECT_EQ(1u, identity.size());
+    EXPECT_EQ(expected_client_identity, identity[0]);
+  }
+}
+}  // namespace
+
+Status TestServiceImpl::Echo(ServerContext* context, const EchoRequest* request,
+                             EchoResponse* response) {
+  response->set_message(request->message());
+  MaybeEchoDeadline(context, request, response);
+  if (host_) {
+    response->mutable_param()->set_host(*host_);
+  }
+  if (request->has_param() && request->param().client_cancel_after_us()) {
+    {
+      std::unique_lock<std::mutex> lock(mu_);
+      signal_client_ = true;
+    }
+    while (!context->IsCancelled()) {
+      gpr_sleep_until(gpr_time_add(
+          gpr_now(GPR_CLOCK_REALTIME),
+          gpr_time_from_micros(request->param().client_cancel_after_us(),
+                               GPR_TIMESPAN)));
+    }
+    return Status::CANCELLED;
+  } else if (request->has_param() &&
+             request->param().server_cancel_after_us()) {
+    gpr_sleep_until(gpr_time_add(
+        gpr_now(GPR_CLOCK_REALTIME),
+        gpr_time_from_micros(request->param().server_cancel_after_us(),
+                             GPR_TIMESPAN)));
+    return Status::CANCELLED;
+  } else {
+    EXPECT_FALSE(context->IsCancelled());
+  }
+
+  if (request->has_param() && request->param().echo_metadata()) {
+    const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata =
+        context->client_metadata();
+    for (
+        std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator iter =
+            client_metadata.begin();
+        iter != client_metadata.end(); ++iter) {
+      context->AddTrailingMetadata(ToString(iter->first),
+                                   ToString(iter->second));
+    }
+  }
+  if (request->has_param() &&
+      (request->param().expected_client_identity().length() > 0 ||
+       request->param().check_auth_context())) {
+    CheckServerAuthContext(context,
+                           request->param().expected_client_identity());
+  }
+  if (request->has_param() && request->param().response_message_length() > 0) {
+    response->set_message(
+        grpc::string(request->param().response_message_length(), '\0'));
+  }
+  if (request->has_param() && request->param().echo_peer()) {
+    response->mutable_param()->set_peer(context->peer());
+  }
+  return Status::OK;
+}
+
+// Unimplemented is left unimplemented to test the returned error.
+
+Status TestServiceImpl::RequestStream(ServerContext* context,
+                                      ServerReader<EchoRequest>* reader,
+                                      EchoResponse* response) {
+  EchoRequest request;
+  response->set_message("");
+  int cancel_after_reads = 0;
+  const std::multimap<grpc::string_ref, grpc::string_ref>&
+      client_initial_metadata = context->client_metadata();
+  if (client_initial_metadata.find(kServerCancelAfterReads) !=
+      client_initial_metadata.end()) {
+    std::istringstream iss(ToString(
+        client_initial_metadata.find(kServerCancelAfterReads)->second));
+    iss >> cancel_after_reads;
+    gpr_log(GPR_INFO, "cancel_after_reads %d", cancel_after_reads);
+  }
+  while (reader->Read(&request)) {
+    if (cancel_after_reads == 1) {
+      gpr_log(GPR_INFO, "return cancel status");
+      return Status::CANCELLED;
+    } else if (cancel_after_reads > 0) {
+      cancel_after_reads--;
+    }
+    response->mutable_message()->append(request.message());
+  }
+  return Status::OK;
+}
+
+// Return 3 messages.
+// TODO(yangg) make it generic by adding a parameter into EchoRequest
+Status TestServiceImpl::ResponseStream(ServerContext* context,
+                                       const EchoRequest* request,
+                                       ServerWriter<EchoResponse>* writer) {
+  EchoResponse response;
+  response.set_message(request->message() + "0");
+  writer->Write(response);
+  response.set_message(request->message() + "1");
+  writer->Write(response);
+  response.set_message(request->message() + "2");
+  writer->Write(response);
+
+  return Status::OK;
+}
+
+Status TestServiceImpl::BidiStream(
+    ServerContext* context,
+    ServerReaderWriter<EchoResponse, EchoRequest>* stream) {
+  EchoRequest request;
+  EchoResponse response;
+  while (stream->Read(&request)) {
+    gpr_log(GPR_INFO, "recv msg %s", request.message().c_str());
+    response.set_message(request.message());
+    stream->Write(response);
+  }
+  return Status::OK;
+}
+
+}  // namespace testing
+}  // namespace grpc
diff --git a/test/cpp/end2end/test_service_impl.h b/test/cpp/end2end/test_service_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..2c35b5614c22449b29ca94f182e968d7638539f2
--- /dev/null
+++ b/test/cpp/end2end/test_service_impl.h
@@ -0,0 +1,85 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef GRPC_TEST_CPP_END2END_TEST_SERVICE_IMPL_H
+#define GRPC_TEST_CPP_END2END_TEST_SERVICE_IMPL_H
+
+#include <memory>
+#include <mutex>
+
+#include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+
+namespace grpc {
+namespace testing {
+
+const char* const kServerCancelAfterReads = "cancel_after_reads";
+
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
+ public:
+  TestServiceImpl() : signal_client_(false), host_() {}
+  explicit TestServiceImpl(const grpc::string& host)
+      : signal_client_(false), host_(new grpc::string(host)) {}
+
+  Status Echo(ServerContext* context, const EchoRequest* request,
+              EchoResponse* response) GRPC_OVERRIDE;
+
+  // Unimplemented is left unimplemented to test the returned error.
+
+  Status RequestStream(ServerContext* context,
+                       ServerReader<EchoRequest>* reader,
+                       EchoResponse* response) GRPC_OVERRIDE;
+
+  Status ResponseStream(ServerContext* context, const EchoRequest* request,
+                        ServerWriter<EchoResponse>* writer) GRPC_OVERRIDE;
+
+  Status BidiStream(ServerContext* context,
+                    ServerReaderWriter<EchoResponse, EchoRequest>* stream)
+      GRPC_OVERRIDE;
+
+  bool signal_client() {
+    std::unique_lock<std::mutex> lock(mu_);
+    return signal_client_;
+  }
+
+ private:
+  bool signal_client_;
+  std::mutex mu_;
+  std::unique_ptr<grpc::string> host_;
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_END2END_TEST_SERVICE_IMPL_H
diff --git a/test/cpp/qps/async_streaming_ping_pong_test.cc b/test/cpp/qps/async_streaming_ping_pong_test.cc
index 0acdf3affb396771d17d9abb2682db73d8ca57d5..97499329c1f2193b5b78a6007797b88a216fc402 100644
--- a/test/cpp/qps/async_streaming_ping_pong_test.cc
+++ b/test/cpp/qps/async_streaming_ping_pong_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,6 @@ static void RunAsyncStreamingPingPong() {
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
   server_config.set_async_server_threads(1);
 
   const auto result =
diff --git a/test/cpp/qps/async_unary_ping_pong_test.cc b/test/cpp/qps/async_unary_ping_pong_test.cc
index d21e116171aadef8cc7cfea43ccebf24bfe05c96..d801bddf4acde25c2f12f9cbed25cb84b823dcd5 100644
--- a/test/cpp/qps/async_unary_ping_pong_test.cc
+++ b/test/cpp/qps/async_unary_ping_pong_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,6 @@ static void RunAsyncUnaryPingPong() {
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
   server_config.set_async_server_threads(1);
 
   const auto result =
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index f270cd09875e9998ae8b3b5f01eddd1079e9b2eb..4229e1956e6947f92e92f774038495ee830ddc5f 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -43,16 +43,19 @@
 #include <vector>
 
 #include <gflags/gflags.h>
+#include <grpc++/channel.h>
+#include <grpc++/client_context.h>
 #include <grpc++/client_context.h>
 #include <grpc++/generic/generic_stub.h>
 #include <grpc/grpc.h>
+#include <grpc/support/cpu.h>
 #include <grpc/support/histogram.h>
 #include <grpc/support/log.h>
 
+#include "src/proto/grpc/testing/services.grpc.pb.h"
 #include "test/cpp/qps/client.h"
 #include "test/cpp/qps/timer.h"
 #include "test/cpp/util/create_test_channel.h"
-#include "src/proto/grpc/testing/services.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
@@ -164,14 +167,15 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
               std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
                   create_stub)
       : ClientImpl<StubType, RequestType>(config, create_stub),
+        num_async_threads_(NumThreads(config)),
         channel_lock_(new std::mutex[config.client_channels()]),
         contexts_(config.client_channels()),
         max_outstanding_per_channel_(config.outstanding_rpcs_per_channel()),
         channel_count_(config.client_channels()),
-        pref_channel_inc_(config.async_client_threads()) {
-    SetupLoadTest(config, config.async_client_threads());
+        pref_channel_inc_(num_async_threads_) {
+    SetupLoadTest(config, num_async_threads_);
 
-    for (int i = 0; i < config.async_client_threads(); i++) {
+    for (int i = 0; i < num_async_threads_; i++) {
       cli_cqs_.emplace_back(new CompletionQueue);
       if (!closed_loop_) {
         rpc_deadlines_.emplace_back();
@@ -324,6 +328,9 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
     return true;
   }
 
+ protected:
+  int num_async_threads_;
+
  private:
   class boolean {  // exists only to avoid data-race on vector<bool>
    public:
@@ -338,6 +345,15 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
    private:
     bool val_;
   };
+  static int NumThreads(const ClientConfig& config) {
+    int num_threads = config.async_client_threads();
+    if (num_threads <= 0) {  // Use dynamic sizing
+      num_threads = gpr_cpu_num_cores();
+      gpr_log(GPR_INFO, "Sizing client server to %d threads", num_threads);
+    }
+    return num_threads;
+  }
+
   std::vector<std::unique_ptr<CompletionQueue>> cli_cqs_;
 
   std::vector<deadline_list> rpc_deadlines_;  // per thread deadlines
@@ -363,7 +379,7 @@ class AsyncUnaryClient GRPC_FINAL
  public:
   explicit AsyncUnaryClient(const ClientConfig& config)
       : AsyncClient(config, SetupCtx, BenchmarkStubCreator) {
-    StartThreads(config.async_client_threads());
+    StartThreads(num_async_threads_);
   }
   ~AsyncUnaryClient() GRPC_OVERRIDE { EndThreads(); }
 
@@ -461,7 +477,7 @@ class AsyncStreamingClient GRPC_FINAL
     // async streaming currently only supports closed loop
     GPR_ASSERT(closed_loop_);
 
-    StartThreads(config.async_client_threads());
+    StartThreads(num_async_threads_);
   }
 
   ~AsyncStreamingClient() GRPC_OVERRIDE { EndThreads(); }
@@ -566,7 +582,7 @@ class GenericAsyncStreamingClient GRPC_FINAL
     // async streaming currently only supports closed loop
     GPR_ASSERT(closed_loop_);
 
-    StartThreads(config.async_client_threads());
+    StartThreads(num_async_threads_);
   }
 
   ~GenericAsyncStreamingClient() GRPC_OVERRIDE { EndThreads(); }
diff --git a/test/cpp/qps/client_sync.cc b/test/cpp/qps/client_sync.cc
index 92fbf240ce2d2fe6028dd3b8493fe62f1fb6ddea..d93537b279b5549048d5726a9c3786b7f51ea87b 100644
--- a/test/cpp/qps/client_sync.cc
+++ b/test/cpp/qps/client_sync.cc
@@ -41,6 +41,7 @@
 #include <vector>
 
 #include <gflags/gflags.h>
+#include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index 66269ae7578d29c8db3f878508dd69499d581a27..490156aec2cec0d9cf19927bbe050c040b2b9f58 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -31,24 +31,25 @@
  *
  */
 
+#include <deque>
 #include <list>
 #include <thread>
-#include <deque>
 #include <vector>
 
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/host_port.h>
+#include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
 
 #include "src/core/support/env.h"
+#include "src/proto/grpc/testing/services.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/qps/driver.h"
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/qps_worker.h"
-#include "src/proto/grpc/testing/services.grpc.pb.h"
 
 using std::list;
 using std::thread;
@@ -142,6 +143,12 @@ std::unique_ptr<ScenarioResult> RunScenario(
     }
   }
 
+  // if num_clients is set to <=0, do dynamic sizing: all workers
+  // except for servers are clients
+  if (num_clients <= 0) {
+    num_clients = workers.size() - num_servers;
+  }
+
   // TODO(ctiller): support running multiple configurations, and binpack
   // client/server pairs
   // to available workers
diff --git a/test/cpp/qps/generic_async_streaming_ping_pong_test.cc b/test/cpp/qps/generic_async_streaming_ping_pong_test.cc
index 2b2e1c820f5c63cb1249a9244d1993480198fffd..d9166ae210f2ee020dfae0cf9b77ade710999cfa 100644
--- a/test/cpp/qps/generic_async_streaming_ping_pong_test.cc
+++ b/test/cpp/qps/generic_async_streaming_ping_pong_test.cc
@@ -60,8 +60,7 @@ static void RunGenericAsyncStreamingPingPong() {
   bbuf->set_req_size(0);
 
   ServerConfig server_config;
-  server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
+  server_config.set_server_type(ASYNC_GENERIC_SERVER);
   server_config.set_async_server_threads(1);
 
   const auto result =
diff --git a/test/cpp/qps/qps-sweep.sh b/test/cpp/qps/qps-sweep.sh
index 36ea974812a56fd5a3038fa8c71da251574946f0..333f4bd7d05779171b2905e4ac222d5b2976fe41 100755
--- a/test/cpp/qps/qps-sweep.sh
+++ b/test/cpp/qps/qps-sweep.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -37,22 +37,93 @@ fi
 
 bins=`find . .. ../.. ../../.. -name bins | head -1`
 
-for secure in true false
-do
-  for channels in 1 2 4 8
-  do
-    for client in SYNC_CLIENT ASYNC_CLIENT
-    do
-      for server in SYNC_SERVER ASYNC_SERVER
-      do
-        for rpc in UNARY STREAMING
-        do
-          echo "Test $rpc $client $server, $channels channels, secure=$secure"
-          "$bins"/opt/qps_driver --rpc_type=$rpc \
-              --client_type=$client --server_type=$server \
-	      --secure_test=$secure
-	done
-      done
-    done
-  done
+set -x
+
+big=65536
+half=`echo $QPS_WORKERS | awk -F, '{print int(NF/2)}'`
+
+for secure in true false; do
+  # Scenario 1: generic async streaming ping-pong (contentionless latency)
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 2: generic async streaming "unconstrained" (QPS)
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=64 --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=1 --num_clients=0
+
+  # Scenario 3: Latency at near-peak load (TBD)
+
+  # Scenario 4: Single-channel bidirectional throughput test (like TCP_STREAM).
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=1 --bbuf_req_size=$big --bbuf_resp_size=$big \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 5: Sync unary ping-pong with protobufs
+  "$bins"/opt/qps_driver --rpc_type=UNARY --client_type=SYNC_CLIENT \
+    --server_type=SYNC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --simple_req_size=0 --simple_resp_size=0 \
+    --secure_test=$secure --num_servers=1 --num_clients=1
+
+  # Scenario 6: Sync streaming ping-pong with protobufs
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=SYNC_CLIENT \
+    --server_type=SYNC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --simple_req_size=0 --simple_resp_size=0 \
+    --secure_test=$secure --num_servers=1 --num_clients=1
+
+  # Scenario 7: Async unary ping-pong with protobufs
+  "$bins"/opt/qps_driver --rpc_type=UNARY --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --simple_req_size=0 --simple_resp_size=0 \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 8: Async streaming ping-pong with protobufs
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --simple_req_size=0 --simple_resp_size=0 \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 9: Crossbar QPS test
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=64 --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=$half --num_clients=0
+
+  # Scenario 10: Multi-channel bidir throughput test
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=64 --bbuf_req_size=$big --bbuf_resp_size=$big \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 11: Single-channel request throughput test
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=1 --bbuf_req_size=$big --bbuf_resp_size=0 \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 12: Single-channel response throughput test
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=1 --bbuf_req_size=0 --bbuf_resp_size=$big \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
+
+  # Scenario 13: Single-channel bidirectional protobuf throughput test
+  "$bins"/opt/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_SERVER --outstanding_rpcs_per_channel=100 \
+    --client_channels=1 --simple_req_size=$big --simple_resp_size=$big \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1
 done
diff --git a/test/cpp/qps/qps_driver.cc b/test/cpp/qps/qps_driver.cc
index e3e7cb296b70cea086b16be049964d4e565b322c..aa3cb6882146ab771b3d00036e2ecb00ed006ffb 100644
--- a/test/cpp/qps/qps_driver.cc
+++ b/test/cpp/qps/qps_driver.cc
@@ -153,7 +153,6 @@ static void QpsDriver() {
 
   ServerConfig server_config;
   server_config.set_server_type(server_type);
-  server_config.set_host("::");  // Use the wildcard server address
   server_config.set_async_server_threads(FLAGS_async_server_threads);
 
   if (FLAGS_secure_test) {
@@ -170,7 +169,7 @@ static void QpsDriver() {
   GPR_ASSERT(!client_config.payload_config().has_bytebuf_params() ||
              (client_config.client_type() == ASYNC_CLIENT &&
               client_config.rpc_type() == STREAMING &&
-              server_config.server_type() == ASYNC_SERVER));
+              server_config.server_type() == ASYNC_GENERIC_SERVER));
 
   const auto result = RunScenario(
       client_config, FLAGS_num_clients, server_config, FLAGS_num_servers,
diff --git a/test/cpp/qps/qps_openloop_test.cc b/test/cpp/qps/qps_openloop_test.cc
index 51df79ef2f3f3eb6b3ac753be2e1a79fa89312f9..fe5f685b6e6a282842af56b0dee4c8b26df3d563 100644
--- a/test/cpp/qps/qps_openloop_test.cc
+++ b/test/cpp/qps/qps_openloop_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,7 +59,6 @@ static void RunQPS() {
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
   server_config.set_async_server_threads(4);
 
   const auto result =
diff --git a/test/cpp/qps/qps_test.cc b/test/cpp/qps/qps_test.cc
index 1f87d18137417f0f7df7fc0663e69351951a46c3..15054db892d930882cc998d93ad18e43dc5caef0 100644
--- a/test/cpp/qps/qps_test.cc
+++ b/test/cpp/qps/qps_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,6 @@ static void RunQPS() {
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
   server_config.set_async_server_threads(8);
 
   const auto result =
diff --git a/test/cpp/qps/qps_test_with_poll.cc b/test/cpp/qps/qps_test_with_poll.cc
index dc800092db9775c593d41d756e3a1a4198ea0730..8340a6386a5f8c433ee1dcd9fff69f918119188f 100644
--- a/test/cpp/qps/qps_test_with_poll.cc
+++ b/test/cpp/qps/qps_test_with_poll.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -62,7 +62,6 @@ static void RunQPS() {
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_host("localhost");
   server_config.set_async_server_threads(4);
 
   const auto result =
diff --git a/test/cpp/qps/qps_worker.cc b/test/cpp/qps/qps_worker.cc
index e782b2a6c5f106e57f2c715558c4c328f6cd09c2..6316605aafd15bef66cf14c9a0858aad157bb714 100644
--- a/test/cpp/qps/qps_worker.cc
+++ b/test/cpp/qps/qps_worker.cc
@@ -97,6 +97,8 @@ static std::unique_ptr<Server> CreateServer(const ServerConfig& config) {
       return CreateSynchronousServer(config);
     case ServerType::ASYNC_SERVER:
       return CreateAsyncServer(config);
+    case ServerType::ASYNC_GENERIC_SERVER:
+      return CreateAsyncGenericServer(config);
     default:
       abort();
   }
diff --git a/test/cpp/qps/secure_sync_unary_ping_pong_test.cc b/test/cpp/qps/secure_sync_unary_ping_pong_test.cc
index ce9f02cceb2a1a74ca7ef790a5b056b6cf40d4a7..359310b85606198725f8988e717409129ad41742 100644
--- a/test/cpp/qps/secure_sync_unary_ping_pong_test.cc
+++ b/test/cpp/qps/secure_sync_unary_ping_pong_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,6 @@ static void RunSynchronousUnaryPingPong() {
 
   ServerConfig server_config;
   server_config.set_server_type(SYNC_SERVER);
-  server_config.set_host("localhost");
 
   // Set up security params
   SecurityParams security;
diff --git a/test/cpp/qps/server.h b/test/cpp/qps/server.h
index 32a3e850263c3a1c86ee5907d71d9c963b5087e4..196fdac8f38a0365a6f50d18e41bbbc274dc5c5f 100644
--- a/test/cpp/qps/server.h
+++ b/test/cpp/qps/server.h
@@ -108,6 +108,7 @@ class Server {
 
 std::unique_ptr<Server> CreateSynchronousServer(const ServerConfig& config);
 std::unique_ptr<Server> CreateAsyncServer(const ServerConfig& config);
+std::unique_ptr<Server> CreateAsyncGenericServer(const ServerConfig& config);
 
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index d530dac86b3da27adafe43e64c99ebe793232385..1302d718f0aeceeddfad407d4bb572893d47d3da 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.cc
@@ -50,8 +50,8 @@
 #include <grpc/support/log.h>
 #include <gtest/gtest.h>
 
-#include "test/cpp/qps/server.h"
 #include "src/proto/grpc/testing/services.grpc.pb.h"
+#include "test/cpp/qps/server.h"
 
 namespace grpc {
 namespace testing {
@@ -76,7 +76,7 @@ class AsyncQpsServerTest : public Server {
       : Server(config) {
     char *server_address = NULL;
 
-    gpr_join_host_port(&server_address, config.host().c_str(), port());
+    gpr_join_host_port(&server_address, "::", port());
 
     ServerBuilder builder;
     builder.AddListeningPort(server_address,
@@ -85,7 +85,13 @@ class AsyncQpsServerTest : public Server {
 
     register_service(&builder, &async_service_);
 
-    for (int i = 0; i < config.async_server_threads(); i++) {
+    int num_threads = config.async_server_threads();
+    if (num_threads <= 0) {  // dynamic sizing
+      num_threads = cores();
+      gpr_log(GPR_INFO, "Sizing async server to %d threads", num_threads);
+    }
+
+    for (int i = 0; i < num_threads; i++) {
       srv_cqs_.emplace_back(builder.AddCompletionQueue());
     }
 
@@ -96,8 +102,8 @@ class AsyncQpsServerTest : public Server {
     auto process_rpc_bound =
         std::bind(process_rpc, config.payload_config(), _1, _2);
 
-    for (int i = 0; i < 10000 / config.async_server_threads(); i++) {
-      for (int j = 0; j < config.async_server_threads(); j++) {
+    for (int i = 0; i < 10000 / num_threads; i++) {
+      for (int j = 0; j < num_threads; j++) {
         if (request_unary_function) {
           auto request_unary =
               std::bind(request_unary_function, &async_service_, _1, _2, _3,
@@ -115,10 +121,10 @@ class AsyncQpsServerTest : public Server {
       }
     }
 
-    for (int i = 0; i < config.async_server_threads(); i++) {
+    for (int i = 0; i < num_threads; i++) {
       shutdown_state_.emplace_back(new PerThreadShutdownState());
     }
-    for (int i = 0; i < config.async_server_threads(); i++) {
+    for (int i = 0; i < num_threads; i++) {
       threads_.emplace_back(&AsyncQpsServerTest::ThreadFunc, this, i);
     }
   }
@@ -350,7 +356,7 @@ class AsyncQpsServerTest : public Server {
 
 static void RegisterBenchmarkService(ServerBuilder *builder,
                                      BenchmarkService::AsyncService *service) {
-  builder->RegisterAsyncService(service);
+  builder->RegisterService(service);
 }
 static void RegisterGenericService(ServerBuilder *builder,
                                    grpc::AsyncGenericService *service) {
@@ -373,7 +379,7 @@ static Status ProcessGenericRPC(const PayloadConfig &payload_config,
                                 const ByteBuffer *request,
                                 ByteBuffer *response) {
   int resp_size = payload_config.bytebuf_params().resp_size();
-  std::unique_ptr<char> buf(new char[resp_size]);
+  std::unique_ptr<char[]> buf(new char[resp_size]);
   gpr_slice s = gpr_slice_from_copied_buffer(buf.get(), resp_size);
   Slice slice(s, Slice::STEAL_REF);
   *response = ByteBuffer(&slice, 1);
diff --git a/test/cpp/qps/server_sync.cc b/test/cpp/qps/server_sync.cc
index 97a1ff52558fffe2864b3c456682b70575a09263..4b778820d070436eda157cef5ca64f065d54f167 100644
--- a/test/cpp/qps/server_sync.cc
+++ b/test/cpp/qps/server_sync.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -89,7 +89,7 @@ class SynchronousServer GRPC_FINAL : public grpc::testing::Server {
 
     char* server_address = NULL;
 
-    gpr_join_host_port(&server_address, config.host().c_str(), port());
+    gpr_join_host_port(&server_address, "::", port());
     builder.AddListeningPort(server_address,
                              Server::CreateServerCredentials(config));
     gpr_free(server_address);
diff --git a/test/cpp/qps/sync_streaming_ping_pong_test.cc b/test/cpp/qps/sync_streaming_ping_pong_test.cc
index dd8c682815c37020de7ef467442a47cafeccce7f..e02c14c926d36e27324440dbce92e0873f4c010d 100644
--- a/test/cpp/qps/sync_streaming_ping_pong_test.cc
+++ b/test/cpp/qps/sync_streaming_ping_pong_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,6 @@ static void RunSynchronousStreamingPingPong() {
 
   ServerConfig server_config;
   server_config.set_server_type(SYNC_SERVER);
-  server_config.set_host("localhost");
 
   const auto result =
       RunScenario(client_config, 1, server_config, 1, WARMUP, BENCHMARK, -2);
diff --git a/test/cpp/qps/sync_unary_ping_pong_test.cc b/test/cpp/qps/sync_unary_ping_pong_test.cc
index 2edb33ef0146952ba740d3c3d7f331cabf8037c4..9d363c04fb2d445b4c0a256834c2ee92bfa30f97 100644
--- a/test/cpp/qps/sync_unary_ping_pong_test.cc
+++ b/test/cpp/qps/sync_unary_ping_pong_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,6 @@ static void RunSynchronousUnaryPingPong() {
 
   ServerConfig server_config;
   server_config.set_server_type(SYNC_SERVER);
-  server_config.set_host("localhost");
 
   const auto result =
       RunScenario(client_config, 1, server_config, 1, WARMUP, BENCHMARK, -2);
diff --git a/test/cpp/util/byte_buffer_proto_helper.cc b/test/cpp/util/byte_buffer_proto_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2512c9bdf8297efd8c7429a187d38ad89a5b226c
--- /dev/null
+++ b/test/cpp/util/byte_buffer_proto_helper.cc
@@ -0,0 +1,60 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/util/byte_buffer_proto_helper.h"
+
+namespace grpc {
+namespace testing {
+
+bool ParseFromByteBuffer(ByteBuffer* buffer, grpc::protobuf::Message* message) {
+  std::vector<Slice> slices;
+  buffer->Dump(&slices);
+  grpc::string buf;
+  buf.reserve(buffer->Length());
+  for (auto s = slices.begin(); s != slices.end(); s++) {
+    buf.append(reinterpret_cast<const char*>(s->begin()), s->size());
+  }
+  return message->ParseFromString(buf);
+}
+
+std::unique_ptr<ByteBuffer> SerializeToByteBuffer(
+    grpc::protobuf::Message* message) {
+  grpc::string buf;
+  message->SerializeToString(&buf);
+  gpr_slice s = gpr_slice_from_copied_string(buf.c_str());
+  Slice slice(s, Slice::STEAL_REF);
+  return std::unique_ptr<ByteBuffer>(new ByteBuffer(&slice, 1));
+}
+
+}  // namespace testing
+}  // namespace grpc
diff --git a/test/cpp/util/byte_buffer_proto_helper.h b/test/cpp/util/byte_buffer_proto_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..42cea59e333701c8e1733c5efa6b97a9315b6401
--- /dev/null
+++ b/test/cpp/util/byte_buffer_proto_helper.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_TEST_CPP_UTIL_BYTE_BUFFER_PROTO_HELPER_H
+#define GRPC_TEST_CPP_UTIL_BYTE_BUFFER_PROTO_HELPER_H
+
+#include <memory>
+
+#include <grpc++/support/byte_buffer.h>
+#include <grpc++/support/config_protobuf.h>
+
+namespace grpc {
+namespace testing {
+
+bool ParseFromByteBuffer(ByteBuffer* buffer, grpc::protobuf::Message* message);
+
+std::unique_ptr<ByteBuffer> SerializeToByteBuffer(
+    grpc::protobuf::Message* message);
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_UTIL_BYTE_BUFFER_PROTO_HELPER_H
diff --git a/test/cpp/util/cli_call.cc b/test/cpp/util/cli_call.cc
index 5e29e7a1d393b68cebe80dc97571efab65f59462..d452be360d18b1f080d6a364f5d0ae78b92235bd 100644
--- a/test/cpp/util/cli_call.cc
+++ b/test/cpp/util/cli_call.cc
@@ -37,6 +37,7 @@
 
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
+#include <grpc++/completion_queue.h>
 #include <grpc++/generic/generic_stub.h>
 #include <grpc++/support/byte_buffer.h>
 #include <grpc/grpc.h>
diff --git a/test/cpp/util/metrics_server.cc b/test/cpp/util/metrics_server.cc
index 40028d39573d6b11e44f104cb452621eecf27367..07978d0bdbfb9e237bc73c8f2fab4b0d625ab9fd 100644
--- a/test/cpp/util/metrics_server.cc
+++ b/test/cpp/util/metrics_server.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,7 @@
 
 #include "test/cpp/util/metrics_server.h"
 
+#include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
diff --git a/tools/dockerfile/grpc_interop_java/Dockerfile b/tools/dockerfile/grpc_interop_java/Dockerfile
index 5ba53246319cc97e468d798bf69df02d36204bd2..8bfb796c24be88e4cc7ba90c24a7d85a971dbc8f 100644
--- a/tools/dockerfile/grpc_interop_java/Dockerfile
+++ b/tools/dockerfile/grpc_interop_java/Dockerfile
@@ -51,7 +51,7 @@ ENV PATH $PATH:$JAVA_HOME/bin
 # Trigger download of as many Gradle artifacts as possible.
 RUN git clone --recursive --depth 1 https://github.com/grpc/grpc-java.git && \
   cd grpc-java && \
-  ./gradlew build -PskipCodegen=true && \
+  ./gradlew :grpc-interop-testing:installDist -PskipCodegen=true && \
   rm -r "$(pwd)"
 
 # Define the default command.
diff --git a/tools/dockerfile/grpc_sanity/Dockerfile b/tools/dockerfile/grpc_sanity/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..8833141832a845e668627a874e2065e8811873d2
--- /dev/null
+++ b/tools/dockerfile/grpc_sanity/Dockerfile
@@ -0,0 +1,83 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Dockerfile for running gRPC sanity tests
+
+FROM debian:jessie
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  golang \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+##################
+# Sanity test dependencies
+RUN apt-get update && apt-get install -y python-pip
+RUN pip install simplejson mako
+
+##################
+# Docker "inception".
+# Note this is quite the ugly hack.
+# This makes sure that the docker binary we inject has its dependencies.
+RUN curl https://get.docker.com/ | sh
+RUN apt-get remove --purge -y docker-engine
+
+##################
+# Build profiling
+RUN apt-get install -y time
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]
diff --git a/tools/dockerfile/grpc_jenkins_slave_x64/Dockerfile b/tools/dockerfile/grpc_tests_multilang_x64/Dockerfile
similarity index 92%
rename from tools/dockerfile/grpc_jenkins_slave_x64/Dockerfile
rename to tools/dockerfile/grpc_tests_multilang_x64/Dockerfile
index 48541b00adf206da6719d3c09055ac7eb938a0d7..aa5fc5cf72a3a064bda2828eb1d8ec124837f048 100644
--- a/tools/dockerfile/grpc_jenkins_slave_x64/Dockerfile
+++ b/tools/dockerfile/grpc_tests_multilang_x64/Dockerfile
@@ -27,8 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# A work-in-progress Dockerfile that allows running gRPC test suites
-# inside a docker container.
+# Dockerfile for running gRPC test suites inside a docker container.
 
 FROM debian:jessie
 
@@ -95,8 +94,6 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
 RUN cd /var/local && wget www.nuget.org/NuGet.exe
 ENV NUGET mono /var/local/NuGet.exe
 
-# TODO(jtattermusch): add dependencies for other languages
-
 ##################
 # Node dependencies
 
@@ -154,17 +151,11 @@ RUN apt-get update && apt-get install -y \
 
 ##################
 # Zookeeper dependencies
-
-# Install dependencies
-
 RUN apt-get install -y libzookeeper-mt-dev
 
 ##################
-# Docker "inception".
-# Note this is quite the ugly hack.
-# This makes sure that the docker binary we inject has its dependencies.
-RUN curl https://get.docker.com/ | sh
-RUN apt-get remove --purge -y docker-engine
+# Build profiling
+RUN apt-get install -y time
 
 RUN mkdir /var/local/jenkins
 
diff --git a/tools/dockerfile/grpc_jenkins_slave_x86/Dockerfile b/tools/dockerfile/grpc_tests_multilang_x86/Dockerfile
similarity index 96%
rename from tools/dockerfile/grpc_jenkins_slave_x86/Dockerfile
rename to tools/dockerfile/grpc_tests_multilang_x86/Dockerfile
index 2323f2338757205ec577823ec203758a9088a17d..6e0dbd7d572ede74ea78f34e5ac4440b8d09fac2 100644
--- a/tools/dockerfile/grpc_jenkins_slave_x86/Dockerfile
+++ b/tools/dockerfile/grpc_tests_multilang_x86/Dockerfile
@@ -27,8 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# A work-in-progress Dockerfile that allows running gRPC test suites
-# inside a docker container.
+# Dockerfile for running gRPC test suites inside a docker container.
 
 FROM 32bit/debian:jessie
 
@@ -95,8 +94,6 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
 RUN cd /var/local && wget www.nuget.org/NuGet.exe
 ENV NUGET mono /var/local/NuGet.exe
 
-# TODO(jtattermusch): add dependencies for other languages
-
 ##################
 # Node dependencies
 
@@ -153,11 +150,11 @@ RUN apt-get update && apt-get install -y \
 
 ##################
 # Zookeeper dependencies
-
-# Install dependencies
-
 RUN apt-get install -y libzookeeper-mt-dev
 
+##################
+# Build profiling
+RUN apt-get install -y time
 
 RUN mkdir /var/local/jenkins
 
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index ad0ad65cb13e1d0a703007a7d4cabee2272f9abc..cdb998d59cca0be82f421402d0b8f498ac09166b 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -770,6 +770,7 @@ include/grpc++/grpc++.h \
 include/grpc++/impl/call.h \
 include/grpc++/impl/client_unary_call.h \
 include/grpc++/impl/grpc_library.h \
+include/grpc++/impl/method_handler_impl.h \
 include/grpc++/impl/proto_utils.h \
 include/grpc++/impl/rpc_method.h \
 include/grpc++/impl/rpc_service_method.h \
@@ -801,7 +802,37 @@ include/grpc++/support/status_code_enum.h \
 include/grpc++/support/string_ref.h \
 include/grpc++/support/stub_options.h \
 include/grpc++/support/sync_stream.h \
-include/grpc++/support/time.h
+include/grpc++/support/time.h \
+include/grpc++/impl/codegen/async_stream.h \
+include/grpc++/impl/codegen/async_unary_call.h \
+include/grpc++/impl/codegen/call.h \
+include/grpc++/impl/codegen/call_hook.h \
+include/grpc++/impl/codegen/channel_interface.h \
+include/grpc++/impl/codegen/client_context.h \
+include/grpc++/impl/codegen/client_unary_call.h \
+include/grpc++/impl/codegen/completion_queue.h \
+include/grpc++/impl/codegen/completion_queue_tag.h \
+include/grpc++/impl/codegen/config.h \
+include/grpc++/impl/codegen/config_protobuf.h \
+include/grpc++/impl/codegen/grpc_library.h \
+include/grpc++/impl/codegen/method_handler_impl.h \
+include/grpc++/impl/codegen/proto_utils.h \
+include/grpc++/impl/codegen/rpc_method.h \
+include/grpc++/impl/codegen/rpc_service_method.h \
+include/grpc++/impl/codegen/security/auth_context.h \
+include/grpc++/impl/codegen/serialization_traits.h \
+include/grpc++/impl/codegen/server_context.h \
+include/grpc++/impl/codegen/server_interface.h \
+include/grpc++/impl/codegen/service_type.h \
+include/grpc++/impl/codegen/status.h \
+include/grpc++/impl/codegen/status_code_enum.h \
+include/grpc++/impl/codegen/string_ref.h \
+include/grpc++/impl/codegen/stub_options.h \
+include/grpc++/impl/codegen/sync.h \
+include/grpc++/impl/codegen/sync_cxx11.h \
+include/grpc++/impl/codegen/sync_no_cxx11.h \
+include/grpc++/impl/codegen/sync_stream.h \
+include/grpc++/impl/codegen/time.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 1d4b0cec7b032c08c966aff923220c2004d292c3..558ec9d3947c78bd31ee9b60fe5827867a490b7e 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -770,6 +770,7 @@ include/grpc++/grpc++.h \
 include/grpc++/impl/call.h \
 include/grpc++/impl/client_unary_call.h \
 include/grpc++/impl/grpc_library.h \
+include/grpc++/impl/method_handler_impl.h \
 include/grpc++/impl/proto_utils.h \
 include/grpc++/impl/rpc_method.h \
 include/grpc++/impl/rpc_service_method.h \
@@ -802,6 +803,36 @@ include/grpc++/support/string_ref.h \
 include/grpc++/support/stub_options.h \
 include/grpc++/support/sync_stream.h \
 include/grpc++/support/time.h \
+include/grpc++/impl/codegen/async_stream.h \
+include/grpc++/impl/codegen/async_unary_call.h \
+include/grpc++/impl/codegen/call.h \
+include/grpc++/impl/codegen/call_hook.h \
+include/grpc++/impl/codegen/channel_interface.h \
+include/grpc++/impl/codegen/client_context.h \
+include/grpc++/impl/codegen/client_unary_call.h \
+include/grpc++/impl/codegen/completion_queue.h \
+include/grpc++/impl/codegen/completion_queue_tag.h \
+include/grpc++/impl/codegen/config.h \
+include/grpc++/impl/codegen/config_protobuf.h \
+include/grpc++/impl/codegen/grpc_library.h \
+include/grpc++/impl/codegen/method_handler_impl.h \
+include/grpc++/impl/codegen/proto_utils.h \
+include/grpc++/impl/codegen/rpc_method.h \
+include/grpc++/impl/codegen/rpc_service_method.h \
+include/grpc++/impl/codegen/security/auth_context.h \
+include/grpc++/impl/codegen/serialization_traits.h \
+include/grpc++/impl/codegen/server_context.h \
+include/grpc++/impl/codegen/server_interface.h \
+include/grpc++/impl/codegen/service_type.h \
+include/grpc++/impl/codegen/status.h \
+include/grpc++/impl/codegen/status_code_enum.h \
+include/grpc++/impl/codegen/string_ref.h \
+include/grpc++/impl/codegen/stub_options.h \
+include/grpc++/impl/codegen/sync.h \
+include/grpc++/impl/codegen/sync_cxx11.h \
+include/grpc++/impl/codegen/sync_no_cxx11.h \
+include/grpc++/impl/codegen/sync_stream.h \
+include/grpc++/impl/codegen/time.h \
 src/cpp/client/secure_credentials.h \
 src/cpp/common/secure_auth_context.h \
 src/cpp/server/secure_server_credentials.h \
@@ -841,7 +872,8 @@ src/cpp/util/byte_buffer.cc \
 src/cpp/util/slice.cc \
 src/cpp/util/status.cc \
 src/cpp/util/string_ref.cc \
-src/cpp/util/time.cc
+src/cpp/util/time.cc \
+src/cpp/codegen/grpc_library.cc
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index db3db4e20031f3d633bb03846652ef6bd1665fd5..03c040fe4c551a9472fa93375a9c00cf5d86e1d2 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -794,7 +794,27 @@ include/grpc/support/tls.h \
 include/grpc/support/tls_gcc.h \
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
-include/grpc/support/useful.h
+include/grpc/support/useful.h \
+include/grpc/impl/codegen/alloc.h \
+include/grpc/impl/codegen/atm.h \
+include/grpc/impl/codegen/atm_gcc_atomic.h \
+include/grpc/impl/codegen/atm_gcc_sync.h \
+include/grpc/impl/codegen/atm_win32.h \
+include/grpc/impl/codegen/byte_buffer.h \
+include/grpc/impl/codegen/compression_types.h \
+include/grpc/impl/codegen/connectivity_state.h \
+include/grpc/impl/codegen/grpc_types.h \
+include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/port_platform.h \
+include/grpc/impl/codegen/propagation_bits.h \
+include/grpc/impl/codegen/slice.h \
+include/grpc/impl/codegen/slice_buffer.h \
+include/grpc/impl/codegen/status.h \
+include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_generic.h \
+include/grpc/impl/codegen/sync_posix.h \
+include/grpc/impl/codegen/sync_win32.h \
+include/grpc/impl/codegen/time.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 97dd4a90e7d9df5ddd38e2dbe39e36ce99c7dc80..11dc33a4630dd84003f0466baf1f6be69d6f2149 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -1077,6 +1077,26 @@ include/grpc/support/tls_gcc.h \
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
 include/grpc/support/useful.h \
+include/grpc/impl/codegen/alloc.h \
+include/grpc/impl/codegen/atm.h \
+include/grpc/impl/codegen/atm_gcc_atomic.h \
+include/grpc/impl/codegen/atm_gcc_sync.h \
+include/grpc/impl/codegen/atm_win32.h \
+include/grpc/impl/codegen/byte_buffer.h \
+include/grpc/impl/codegen/compression_types.h \
+include/grpc/impl/codegen/connectivity_state.h \
+include/grpc/impl/codegen/grpc_types.h \
+include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/port_platform.h \
+include/grpc/impl/codegen/propagation_bits.h \
+include/grpc/impl/codegen/slice.h \
+include/grpc/impl/codegen/slice_buffer.h \
+include/grpc/impl/codegen/status.h \
+include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_generic.h \
+include/grpc/impl/codegen/sync_posix.h \
+include/grpc/impl/codegen/sync_win32.h \
+include/grpc/impl/codegen/time.h \
 src/core/profiling/timers.h \
 src/core/support/block_annotate.h \
 src/core/support/env.h \
diff --git a/tools/jenkins/docker_run_tests.sh b/tools/jenkins/docker_run_tests.sh
index 148a0f5e08ed6199378afc4ccf1d9e7493b8839e..26e5585d2d8ba812add9903fc09b005378910ff3 100755
--- a/tools/jenkins/docker_run_tests.sh
+++ b/tools/jenkins/docker_run_tests.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -43,8 +43,12 @@ chown `whoami` $XDG_CACHE_HOME
 mkdir -p /var/local/git
 git clone --recursive /var/local/jenkins/grpc /var/local/git/grpc
 
-nvm use 0.12
-rvm use ruby-2.1
+nvm use 0.12 || true
+
+if [ -x "$(command -v rvm)" ]
+then
+  rvm use ruby-2.1
+fi
 
 mkdir -p reports
 
diff --git a/tools/jenkins/run_jenkins.sh b/tools/jenkins/run_jenkins.sh
index 123b252719ae4c9dce1d9bcc45114c4150db03e4..da6ca698095dff0e06b25bdb41b7dd669dcc29e4 100755
--- a/tools/jenkins/run_jenkins.sh
+++ b/tools/jenkins/run_jenkins.sh
@@ -41,7 +41,7 @@ set -ex -o igncr || set -ex
 
 if [ "$platform" == "linux" ]
 then
-  USE_DOCKER_MAYBE="--use_docker"
+  PLATFORM_SPECIFIC_ARGS="--use_docker --measure_cpu_costs"
 elif [ "$platform" == "freebsd" ]
 then
   export MAKE=gmake
@@ -49,7 +49,14 @@ fi
 
 unset platform  # variable named 'platform' breaks the windows build
 
-python tools/run_tests/run_tests.py $USE_DOCKER_MAYBE -t -l $language -c $config -x report.xml -j 3 $@ || TESTS_FAILED="true"
+python tools/run_tests/run_tests.py \
+  $PLATFORM_SPECIFIC_ARGS           \
+  -t                                \
+  -l $language                      \
+  -c $config                        \
+  -x report.xml                     \
+  -j 2                              \
+  $@ || TESTS_FAILED="true"
 
 if [ ! -e reports/index.html ]
 then
diff --git a/tools/jenkins/run_portability.sh b/tools/jenkins/run_portability.sh
index f76dbd3144c5549e1ab42d29373a7a72e882ca4e..6f15da73f4306628e335f4f30bce18e3d0119e31 100755
--- a/tools/jenkins/run_portability.sh
+++ b/tools/jenkins/run_portability.sh
@@ -41,6 +41,14 @@ set -ex -o igncr || set -ex
 
 echo "building $scenario"
 
+# If scenario has _bo suffix, add --build_only flag.
+# Short suffix name had to been chosen due to path length limit on Windows.
+if [ "$scenario" != "${scenario%_bo}" ]
+then
+  scenario="${scenario%_bo}"
+  BUILD_ONLY_MAYBE="--build_only"
+fi
+
 parts=($(echo $scenario | tr '_' ' '))  # split scenario into parts
 
 curr_platform=${parts[0]}  # variable named 'platform' breaks the windows build
@@ -48,12 +56,10 @@ curr_arch=${parts[1]}
 curr_compiler=${parts[2]}
 
 config='dbg'
-maybe_build_only='--build_only'
 
-if [ "$curr_platform" == "windows" ]
+if [ "$curr_platform" == "linux" ]
 then
-  python tools/run_tests/run_tests.py -t -l $language -c $config --arch ${curr_arch} --compiler ${curr_compiler} ${maybe_build_only} -x report.xml $@
-else
-  echo "Unsupported scenario."
-  exit 1
+  USE_DOCKER_MAYBE="--use_docker"
 fi
+
+python tools/run_tests/run_tests.py $USE_DOCKER_MAYBE $BUILD_ONLY_MAYBE -t -l $language -c $config --arch ${curr_arch} --compiler ${curr_compiler} -x report.xml -j 3 $@
diff --git a/tools/run_tests/configs.json b/tools/run_tests/configs.json
index 769942df996165e9661bb95de955d2105140a8c4..d508c6394cba030a7787ab05956793c2fd993e3e 100644
--- a/tools/run_tests/configs.json
+++ b/tools/run_tests/configs.json
@@ -59,7 +59,7 @@
   }, 
   {
     "config": "msan", 
-    "timeout_multiplier": 1.5
+    "timeout_multiplier": 2
   }, 
   {
     "config": "mutrace"
diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index beeb99c0ae9fdbfb9c2807c10fb47ccc60013704..adf178bb3c359279afb2bfefdc70f752cfa6007c 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -360,7 +360,7 @@ class Jobset(object):
       if self.cancelled(): return False
       current_cpu_cost = self.cpu_cost()
       if current_cpu_cost == 0: break
-      if current_cpu_cost + spec.cpu_cost < self._maxjobs: break
+      if current_cpu_cost + spec.cpu_cost <= self._maxjobs: break
       self.reap()
     if self.cancelled(): return False
     if spec.hash_targets:
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 488af3b4da70cbc4cbe16b4ccdb4413550f9831d..9e7b97c6a212b3e4e68da6e6ef42dd0696246df3 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -132,8 +132,10 @@ class CLanguage(object):
       if config.build_config in target['exclude_configs']:
         continue
       if self.platform == 'windows':
-        binary = 'vsprojects/%s/%s.exe' % (
-            _WINDOWS_CONFIG[config.build_config], target['name'])
+        binary = 'vsprojects/%s%s/%s.exe' % (
+            'x64/' if args.arch == 'x64' else '',
+            _WINDOWS_CONFIG[config.build_config],
+            target['name'])
       else:
         binary = 'bins/%s/%s' % (config.build_config, target['name'])
       if os.path.isfile(binary):
@@ -151,9 +153,9 @@ class CLanguage(object):
   def make_targets(self, test_regex):
     if platform_string() != 'windows' and test_regex != '.*':
       # use the regex to minimize the number of things to build
-      return [target['name']
+      return [os.path.basename(target['name'])
               for target in get_c_tests(False, self.test_lang)
-              if re.search(test_regex, target['name'])]
+              if re.search(test_regex, '/' + target['name'])]
     if platform_string() == 'windows':
       # don't build tools on windows just yet
       return ['buildtests_%s' % self.make_target]
@@ -183,6 +185,9 @@ class CLanguage(object):
   def supports_multi_config(self):
     return True
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return self.make_target
 
@@ -215,6 +220,9 @@ class NodeLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'node'
 
@@ -246,6 +254,9 @@ class PhpLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'php'
 
@@ -299,6 +310,9 @@ class PythonLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'python'
 
@@ -330,6 +344,9 @@ class RubyLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'ruby'
 
@@ -412,6 +429,9 @@ class CSharpLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'csharp'
 
@@ -443,6 +463,9 @@ class ObjCLanguage(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return 'objc'
 
@@ -451,8 +474,10 @@ class Sanity(object):
 
   def test_specs(self, config, args):
     import yaml
-    with open('tools/run_tests/sanity_tests.yaml', 'r') as f:
-      return [config.job_spec(cmd['script'].split(), None, timeout_seconds=None, environ={'TEST': 'true'}, cpu_cost=cmd.get('cpu_cost', 1))
+    with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
+      return [config.job_spec(cmd['script'].split(), None,
+                              timeout_seconds=None, environ={'TEST': 'true'},
+                              cpu_cost=cmd.get('cpu_cost', 1))
               for cmd in yaml.load(f)]
 
   def pre_build_steps(self):
@@ -476,6 +501,9 @@ class Sanity(object):
   def supports_multi_config(self):
     return False
 
+  def dockerfile_dir(self, config, arch):
+    return 'tools/dockerfile/grpc_sanity'
+
   def __str__(self):
     return 'sanity'
 
@@ -506,6 +534,9 @@ class Build(object):
   def supports_multi_config(self):
     return True
 
+  def dockerfile_dir(self, config, arch):
+    return None
+
   def __str__(self):
     return self.make_target
 
@@ -545,7 +576,7 @@ def _windows_arch_option(arch):
   else:
     print 'Architecture %s not supported.' % arch
     sys.exit(1)
-    
+
 
 def _check_arch_option(arch):
   """Checks that architecture option is valid."""
@@ -595,15 +626,19 @@ def _windows_toolset_option(compiler):
     sys.exit(1)
 
 
-def _get_dockerfile_dir(arch):
+def _get_dockerfile_dir(language, cfg, arch):
   """Returns dockerfile to use"""
-  if arch == 'default' or arch == 'x64':
-    return 'tools/dockerfile/grpc_jenkins_slave_x64'
-  elif arch == 'x86':
-    return 'tools/dockerfile/grpc_jenkins_slave_x86'
+  custom = language.dockerfile_dir(cfg, arch)
+  if custom:
+    return custom
   else:
-    print 'Architecture %s not supported with current settings.' % arch
-    sys.exit(1)
+    if arch == 'default' or arch == 'x64':
+      return 'tools/dockerfile/grpc_tests_multilang_x64'
+    elif arch == 'x86':
+      return 'tools/dockerfile/grpc_tests_multilang_x86'
+    else:
+      print 'Architecture %s not supported with current settings.' % arch
+      sys.exit(1)
 
 def runs_per_test_type(arg_str):
     """Auxilary function to parse the "runs_per_test" flag.
@@ -771,11 +806,13 @@ if args.use_docker:
     time.sleep(5)
 
   child_argv = [ arg for arg in sys.argv if not arg == '--use_docker' ]
-  run_tests_cmd = 'tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
+  run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
 
   env = os.environ.copy()
   env['RUN_TESTS_COMMAND'] = run_tests_cmd
-  env['DOCKERFILE_DIR'] = _get_dockerfile_dir(args.arch)
+  env['DOCKERFILE_DIR'] = _get_dockerfile_dir(next(iter(languages)),
+                                              next(iter(build_configs)),
+                                              args.arch)
   env['DOCKER_RUN_SCRIPT'] = 'tools/jenkins/docker_run_tests.sh'
   if args.xml_report:
     env['XML_REPORT'] = args.xml_report
@@ -786,7 +823,7 @@ if args.use_docker:
                         shell=True,
                         env=env)
   sys.exit(0)
-  
+
 if platform_string() != 'windows' and args.compiler != 'default':
     print 'Compiler %s not supported on current platform.' % args.compiler
     sys.exit(1)
@@ -1024,13 +1061,15 @@ def _build_and_run(
     check_cancelled, newline_on_success, cache, xml_report=None, build_only=False):
   """Do one pass of building & running tests."""
   # build latest sequentially
-  num_failures, _ = jobset.run(
+  num_failures, resultset = jobset.run(
       build_steps, maxjobs=1, stop_on_failure=True,
       newline_on_success=newline_on_success, travis=args.travis)
   if num_failures:
     return [BuildAndRunError.BUILD]
 
   if build_only:
+    if xml_report:
+      report_utils.render_junit_xml_report(resultset, xml_report)
     return []
 
   # start antagonists
diff --git a/tools/run_tests/check_cache_mk.sh b/tools/run_tests/sanity/check_cache_mk.sh
similarity index 100%
rename from tools/run_tests/check_cache_mk.sh
rename to tools/run_tests/sanity/check_cache_mk.sh
diff --git a/tools/run_tests/check_sources_and_headers.py b/tools/run_tests/sanity/check_sources_and_headers.py
similarity index 66%
rename from tools/run_tests/check_sources_and_headers.py
rename to tools/run_tests/sanity/check_sources_and_headers.py
index 50574f44b0ee539917df7a4d93636685e822f789..3974af0032b07ded797b7bc9c14cb16fbe0cc713 100755
--- a/tools/run_tests/check_sources_and_headers.py
+++ b/tools/run_tests/sanity/check_sources_and_headers.py
@@ -33,9 +33,9 @@ import os
 import re
 import sys
 
-root = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
+root = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
 with open(os.path.join(root, 'tools', 'run_tests', 'sources_and_headers.json')) as f:
-	js = json.loads(f.read())
+  js = json.loads(f.read())
 
 re_inc1 = re.compile(r'^#\s*include\s*"([^"]*)"')
 assert re_inc1.match('#include "foo"').group(1) == 'foo'
@@ -43,41 +43,41 @@ re_inc2 = re.compile(r'^#\s*include\s*<((grpc|grpc\+\+)/[^"]*)>')
 assert re_inc2.match('#include <grpc++/foo>').group(1) == 'grpc++/foo'
 
 def get_target(name):
-	for target in js:
-		if target['name'] == name:
-			return target
-	assert False, 'no target %s' % name
+  for target in js:
+    if target['name'] == name:
+      return target
+  assert False, 'no target %s' % name
 
 def target_has_header(target, name):
-#	print target['name'], name
-	if name in target['headers']:
-		return True
-	for dep in target['deps']:
-		if target_has_header(get_target(dep), name):
-			return True
-	if name == 'src/core/profiling/stap_probes.h':
-		return True
-	return False
+  # print target['name'], name
+  if name in target['headers']:
+    return True
+  for dep in target['deps']:
+    if target_has_header(get_target(dep), name):
+      return True
+  if name == 'src/core/profiling/stap_probes.h':
+    return True
+  return False
 
 errors = 0
 for target in js:
-	for fn in target['src']:
-		with open(os.path.join(root, fn)) as f:
-			src = f.read().splitlines()
-		for line in src:
-			m = re_inc1.match(line)
-			if m:
-				if not target_has_header(target, m.group(1)):
-					print (
-						'target %s (%s) does not name header %s as a dependency' % (
-							target['name'], fn, m.group(1)))
-					errors += 1
-			m = re_inc2.match(line)
-			if m:
-				if not target_has_header(target, 'include/' + m.group(1)):
-					print (
-						'target %s (%s) does not name header %s as a dependency' % (
-							target['name'], fn, m.group(1)))
-					errors += 1
+  for fn in target['src']:
+    with open(os.path.join(root, fn)) as f:
+      src = f.read().splitlines()
+    for line in src:
+      m = re_inc1.match(line)
+      if m:
+        if not target_has_header(target, m.group(1)):
+          print (
+            'target %s (%s) does not name header %s as a dependency' % (
+              target['name'], fn, m.group(1)))
+          errors += 1
+      m = re_inc2.match(line)
+      if m:
+        if not target_has_header(target, 'include/' + m.group(1)):
+          print (
+            'target %s (%s) does not name header %s as a dependency' % (
+              target['name'], fn, m.group(1)))
+          errors += 1
 
 assert errors == 0
diff --git a/tools/run_tests/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
similarity index 98%
rename from tools/run_tests/check_submodules.sh
rename to tools/run_tests/sanity/check_submodules.sh
index b4ca4fa3ce579281073f2ca6e27f1c229b3090a9..f49230e49aa44cc3de8ea83be8bb49bbe81240c0 100755
--- a/tools/run_tests/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -34,7 +34,7 @@ set -e
 
 export TEST=true
 
-cd `dirname $0`/../..
+cd `dirname $0`/../../..
 
 submodules=`mktemp /tmp/submXXXXXX`
 want_submodules=`mktemp /tmp/submXXXXXX`
diff --git a/tools/run_tests/sanity_tests.yaml b/tools/run_tests/sanity/sanity_tests.yaml
similarity index 61%
rename from tools/run_tests/sanity_tests.yaml
rename to tools/run_tests/sanity/sanity_tests.yaml
index 757bcd9d341a89fde36ca71248d7948f677bba4f..809e6ce645414fe527b9112c4dc1c5d715c1f592 100644
--- a/tools/run_tests/sanity_tests.yaml
+++ b/tools/run_tests/sanity/sanity_tests.yaml
@@ -1,7 +1,7 @@
 # a set of tests that are run in parallel for sanity tests
-- script: tools/run_tests/check_sources_and_headers.py
-- script: tools/run_tests/check_submodules.sh
-- script: tools/run_tests/check_cache_mk.sh
+- script: tools/run_tests/sanity/check_sources_and_headers.py
+- script: tools/run_tests/sanity/check_submodules.sh
+- script: tools/run_tests/sanity/check_cache_mk.sh
 - script: tools/buildgen/generate_projects.sh -j 3
   cpu_cost: 3
 - script: tools/distrib/check_copyright.py
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index a311a04af3bbdb672c2b7436623ac7bf79fa252c..9113f1ca057e39c7153feb431f0aefaa200f73e2 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1616,6 +1616,22 @@
       "src/compiler/ruby_plugin.cc"
     ]
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "hybrid_end2end_test", 
+    "src": [
+      "test/cpp/end2end/hybrid_end2end_test.cc"
+    ]
+  }, 
   {
     "deps": [
       "gpr", 
@@ -2738,6 +2754,26 @@
   {
     "deps": [], 
     "headers": [
+      "include/grpc/impl/codegen/alloc.h", 
+      "include/grpc/impl/codegen/atm.h", 
+      "include/grpc/impl/codegen/atm_gcc_atomic.h", 
+      "include/grpc/impl/codegen/atm_gcc_sync.h", 
+      "include/grpc/impl/codegen/atm_win32.h", 
+      "include/grpc/impl/codegen/byte_buffer.h", 
+      "include/grpc/impl/codegen/compression_types.h", 
+      "include/grpc/impl/codegen/connectivity_state.h", 
+      "include/grpc/impl/codegen/grpc_types.h", 
+      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/port_platform.h", 
+      "include/grpc/impl/codegen/propagation_bits.h", 
+      "include/grpc/impl/codegen/slice.h", 
+      "include/grpc/impl/codegen/slice_buffer.h", 
+      "include/grpc/impl/codegen/status.h", 
+      "include/grpc/impl/codegen/sync.h", 
+      "include/grpc/impl/codegen/sync_generic.h", 
+      "include/grpc/impl/codegen/sync_posix.h", 
+      "include/grpc/impl/codegen/sync_win32.h", 
+      "include/grpc/impl/codegen/time.h", 
       "include/grpc/support/alloc.h", 
       "include/grpc/support/atm.h", 
       "include/grpc/support/atm_gcc_atomic.h", 
@@ -2780,6 +2816,26 @@
     "language": "c", 
     "name": "gpr", 
     "src": [
+      "include/grpc/impl/codegen/alloc.h", 
+      "include/grpc/impl/codegen/atm.h", 
+      "include/grpc/impl/codegen/atm_gcc_atomic.h", 
+      "include/grpc/impl/codegen/atm_gcc_sync.h", 
+      "include/grpc/impl/codegen/atm_win32.h", 
+      "include/grpc/impl/codegen/byte_buffer.h", 
+      "include/grpc/impl/codegen/compression_types.h", 
+      "include/grpc/impl/codegen/connectivity_state.h", 
+      "include/grpc/impl/codegen/grpc_types.h", 
+      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/port_platform.h", 
+      "include/grpc/impl/codegen/propagation_bits.h", 
+      "include/grpc/impl/codegen/slice.h", 
+      "include/grpc/impl/codegen/slice_buffer.h", 
+      "include/grpc/impl/codegen/status.h", 
+      "include/grpc/impl/codegen/sync.h", 
+      "include/grpc/impl/codegen/sync_generic.h", 
+      "include/grpc/impl/codegen/sync_posix.h", 
+      "include/grpc/impl/codegen/sync_win32.h", 
+      "include/grpc/impl/codegen/time.h", 
       "include/grpc/support/alloc.h", 
       "include/grpc/support/atm.h", 
       "include/grpc/support/atm_gcc_atomic.h", 
@@ -3844,7 +3900,38 @@
       "include/grpc++/grpc++.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/impl/grpc_library.h", 
+      "include/grpc++/impl/method_handler_impl.h", 
       "include/grpc++/impl/proto_utils.h", 
       "include/grpc++/impl/rpc_method.h", 
       "include/grpc++/impl/rpc_service_method.h", 
@@ -3898,7 +3985,38 @@
       "include/grpc++/grpc++.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/impl/grpc_library.h", 
+      "include/grpc++/impl/method_handler_impl.h", 
       "include/grpc++/impl/proto_utils.h", 
       "include/grpc++/impl/rpc_method.h", 
       "include/grpc++/impl/rpc_service_method.h", 
@@ -3941,6 +4059,7 @@
       "src/cpp/client/insecure_credentials.cc", 
       "src/cpp/client/secure_credentials.cc", 
       "src/cpp/client/secure_credentials.h", 
+      "src/cpp/codegen/grpc_library.cc", 
       "src/cpp/common/auth_property_iterator.cc", 
       "src/cpp/common/call.cc", 
       "src/cpp/common/channel_arguments.cc", 
@@ -3997,6 +4116,8 @@
       "src/proto/grpc/testing/echo.pb.h", 
       "src/proto/grpc/testing/echo_messages.grpc.pb.h", 
       "src/proto/grpc/testing/echo_messages.pb.h", 
+      "test/cpp/end2end/test_service_impl.h", 
+      "test/cpp/util/byte_buffer_proto_helper.h", 
       "test/cpp/util/cli_call.h", 
       "test/cpp/util/create_test_channel.h", 
       "test/cpp/util/string_ref_helper.h", 
@@ -4005,6 +4126,10 @@
     "language": "c++", 
     "name": "grpc++_test_util", 
     "src": [
+      "test/cpp/end2end/test_service_impl.cc", 
+      "test/cpp/end2end/test_service_impl.h", 
+      "test/cpp/util/byte_buffer_proto_helper.cc", 
+      "test/cpp/util/byte_buffer_proto_helper.h", 
       "test/cpp/util/cli_call.cc", 
       "test/cpp/util/cli_call.h", 
       "test/cpp/util/create_test_channel.cc", 
@@ -4030,7 +4155,38 @@
       "include/grpc++/grpc++.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/impl/grpc_library.h", 
+      "include/grpc++/impl/method_handler_impl.h", 
       "include/grpc++/impl/proto_utils.h", 
       "include/grpc++/impl/rpc_method.h", 
       "include/grpc++/impl/rpc_service_method.h", 
@@ -4081,7 +4237,38 @@
       "include/grpc++/grpc++.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/impl/grpc_library.h", 
+      "include/grpc++/impl/method_handler_impl.h", 
       "include/grpc++/impl/proto_utils.h", 
       "include/grpc++/impl/rpc_method.h", 
       "include/grpc++/impl/rpc_service_method.h", 
@@ -4122,6 +4309,7 @@
       "src/cpp/client/credentials.cc", 
       "src/cpp/client/generic_stub.cc", 
       "src/cpp/client/insecure_credentials.cc", 
+      "src/cpp/codegen/grpc_library.cc", 
       "src/cpp/common/call.cc", 
       "src/cpp/common/channel_arguments.cc", 
       "src/cpp/common/completion_queue.cc", 
@@ -4151,8 +4339,58 @@
   {
     "deps": [], 
     "headers": [
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/support/config.h", 
       "include/grpc++/support/config_protobuf.h", 
+      "include/grpc/impl/codegen/alloc.h", 
+      "include/grpc/impl/codegen/atm.h", 
+      "include/grpc/impl/codegen/atm_gcc_atomic.h", 
+      "include/grpc/impl/codegen/atm_gcc_sync.h", 
+      "include/grpc/impl/codegen/atm_win32.h", 
+      "include/grpc/impl/codegen/byte_buffer.h", 
+      "include/grpc/impl/codegen/compression_types.h", 
+      "include/grpc/impl/codegen/connectivity_state.h", 
+      "include/grpc/impl/codegen/grpc_types.h", 
+      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/port_platform.h", 
+      "include/grpc/impl/codegen/propagation_bits.h", 
+      "include/grpc/impl/codegen/slice.h", 
+      "include/grpc/impl/codegen/slice_buffer.h", 
+      "include/grpc/impl/codegen/status.h", 
+      "include/grpc/impl/codegen/sync.h", 
+      "include/grpc/impl/codegen/sync_generic.h", 
+      "include/grpc/impl/codegen/sync_posix.h", 
+      "include/grpc/impl/codegen/sync_win32.h", 
+      "include/grpc/impl/codegen/time.h", 
       "src/compiler/config.h", 
       "src/compiler/cpp_generator.h", 
       "src/compiler/cpp_generator_helpers.h", 
@@ -4170,8 +4408,58 @@
     "language": "c++", 
     "name": "grpc_plugin_support", 
     "src": [
+      "include/grpc++/impl/codegen/async_stream.h", 
+      "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/call.h", 
+      "include/grpc++/impl/codegen/call_hook.h", 
+      "include/grpc++/impl/codegen/channel_interface.h", 
+      "include/grpc++/impl/codegen/client_context.h", 
+      "include/grpc++/impl/codegen/client_unary_call.h", 
+      "include/grpc++/impl/codegen/completion_queue.h", 
+      "include/grpc++/impl/codegen/completion_queue_tag.h", 
+      "include/grpc++/impl/codegen/config.h", 
+      "include/grpc++/impl/codegen/config_protobuf.h", 
+      "include/grpc++/impl/codegen/grpc_library.h", 
+      "include/grpc++/impl/codegen/method_handler_impl.h", 
+      "include/grpc++/impl/codegen/proto_utils.h", 
+      "include/grpc++/impl/codegen/rpc_method.h", 
+      "include/grpc++/impl/codegen/rpc_service_method.h", 
+      "include/grpc++/impl/codegen/security/auth_context.h", 
+      "include/grpc++/impl/codegen/serialization_traits.h", 
+      "include/grpc++/impl/codegen/server_context.h", 
+      "include/grpc++/impl/codegen/server_interface.h", 
+      "include/grpc++/impl/codegen/service_type.h", 
+      "include/grpc++/impl/codegen/status.h", 
+      "include/grpc++/impl/codegen/status_code_enum.h", 
+      "include/grpc++/impl/codegen/string_ref.h", 
+      "include/grpc++/impl/codegen/stub_options.h", 
+      "include/grpc++/impl/codegen/sync.h", 
+      "include/grpc++/impl/codegen/sync_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_no_cxx11.h", 
+      "include/grpc++/impl/codegen/sync_stream.h", 
+      "include/grpc++/impl/codegen/time.h", 
       "include/grpc++/support/config.h", 
       "include/grpc++/support/config_protobuf.h", 
+      "include/grpc/impl/codegen/alloc.h", 
+      "include/grpc/impl/codegen/atm.h", 
+      "include/grpc/impl/codegen/atm_gcc_atomic.h", 
+      "include/grpc/impl/codegen/atm_gcc_sync.h", 
+      "include/grpc/impl/codegen/atm_win32.h", 
+      "include/grpc/impl/codegen/byte_buffer.h", 
+      "include/grpc/impl/codegen/compression_types.h", 
+      "include/grpc/impl/codegen/connectivity_state.h", 
+      "include/grpc/impl/codegen/grpc_types.h", 
+      "include/grpc/impl/codegen/log.h", 
+      "include/grpc/impl/codegen/port_platform.h", 
+      "include/grpc/impl/codegen/propagation_bits.h", 
+      "include/grpc/impl/codegen/slice.h", 
+      "include/grpc/impl/codegen/slice_buffer.h", 
+      "include/grpc/impl/codegen/status.h", 
+      "include/grpc/impl/codegen/sync.h", 
+      "include/grpc/impl/codegen/sync_generic.h", 
+      "include/grpc/impl/codegen/sync_posix.h", 
+      "include/grpc/impl/codegen/sync_win32.h", 
+      "include/grpc/impl/codegen/time.h", 
       "src/compiler/config.h", 
       "src/compiler/cpp_generator.cc", 
       "src/compiler/cpp_generator.h", 
@@ -4189,7 +4477,8 @@
       "src/compiler/ruby_generator.h", 
       "src/compiler/ruby_generator_helpers-inl.h", 
       "src/compiler/ruby_generator_map-inl.h", 
-      "src/compiler/ruby_generator_string-inl.h"
+      "src/compiler/ruby_generator_string-inl.h", 
+      "src/cpp/codegen/grpc_library.cc"
     ]
   }, 
   {
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 8c76b3f134f65e7630181a5a5208c304f96e8b95..fdfdc1b2717547857173e19d92d8cea2196d335a 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -1979,6 +1979,26 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "hybrid_end2end_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [
@@ -2433,6 +2453,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2456,6 +2477,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2479,6 +2501,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2502,6 +2525,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2525,6 +2549,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2551,6 +2576,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2577,6 +2603,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2603,6 +2630,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2629,6 +2657,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2655,6 +2684,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2681,6 +2711,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2707,6 +2738,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2733,6 +2765,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2759,6 +2792,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2785,6 +2819,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2811,6 +2846,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2837,6 +2873,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2863,6 +2900,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2889,6 +2927,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2915,6 +2954,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2941,6 +2981,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2967,6 +3008,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -2993,6 +3035,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3019,6 +3062,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3045,6 +3089,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3071,6 +3116,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3097,6 +3143,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3123,6 +3170,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3149,6 +3197,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3174,6 +3223,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3197,6 +3247,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3220,6 +3271,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3245,6 +3297,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3268,6 +3321,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3291,6 +3345,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3314,6 +3369,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3337,6 +3393,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3360,6 +3417,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3383,6 +3441,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3406,6 +3465,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3429,6 +3489,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3452,6 +3513,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3477,6 +3539,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3500,6 +3563,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3523,6 +3587,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3548,6 +3613,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3571,6 +3637,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3594,6 +3661,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3617,6 +3685,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3640,6 +3709,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3665,6 +3735,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3688,6 +3759,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3711,6 +3783,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3734,6 +3807,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3757,6 +3831,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3780,6 +3855,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3803,6 +3879,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3826,6 +3903,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
@@ -3849,6 +3927,7 @@
       "windows"
     ], 
     "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
     "exclude_configs": [
       "asan"
     ], 
diff --git a/tools/tsan_suppressions.txt b/tools/tsan_suppressions.txt
index 65e7e2ec4b30f2b39b9c9a05462ec929ed01faae..09e68cd2335ae760fae8839f03989b0aa9f4d2f0 100644
--- a/tools/tsan_suppressions.txt
+++ b/tools/tsan_suppressions.txt
@@ -5,4 +5,4 @@ race:cleanse_ctr
 # https://www.mail-archive.com/openssl-dev@openssl.org/msg09019.html
 race:ssleay_rand_add
 race:ssleay_rand_bytes
-
+race:__sleep_for
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj b/vsprojects/vcxproj/gpr/gpr.vcxproj
index 270fc89749d1972b064a0563cc60cae763a0af48..cba35888905936f36bffe7b0a70022eed74a3564 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj
@@ -175,6 +175,26 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\tls_msvc.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\tls_pthread.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\useful.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_win32.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_win32.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\profiling\timers.h" />
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
index c92a92fb9b12a5e63dc063256e05a65ad9d39f8a..1f8b09a1e9a40b4460e1ce27e561b838655fd39d 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
@@ -210,6 +210,66 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\support\useful.h">
       <Filter>include\grpc\support</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_win32.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_win32.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\profiling\timers.h">
@@ -251,6 +311,12 @@
     <Filter Include="include\grpc">
       <UniqueIdentifier>{e6957ec1-85ba-6515-03c0-e12878045b1f}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\impl">
+      <UniqueIdentifier>{4c72091a-872d-10da-2694-ce5a7b069a1f}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc\impl\codegen">
+      <UniqueIdentifier>{e52e0384-d0d3-1475-0d4e-11719aac8f2a}</UniqueIdentifier>
+    </Filter>
     <Filter Include="include\grpc\support">
       <UniqueIdentifier>{31c42000-3ed7-95e1-d076-df814b72cdee}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index 886d415631ad6020fc623d365ea8f928e6876bc6..2eea7264471b0530420272bd509ca6599d3590b6 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -268,6 +268,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\client_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\grpc_library.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\method_handler_impl.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\proto_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\rpc_method.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\rpc_service_method.h" />
@@ -300,6 +301,36 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\time.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\secure_credentials.h" />
@@ -376,6 +407,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\time.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index abd39c7aa1e7f8c6f337f06c6a9ba37c2a1ca5cb..d5654d0a52fde2db980388ca2e9d77809fb24b1a 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -97,6 +97,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\time.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+      <Filter>src\cpp\codegen</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\channel.h">
@@ -129,6 +132,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\grpc_library.h">
       <Filter>include\grpc++\impl</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\method_handler_impl.h">
+      <Filter>include\grpc++\impl</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\proto_utils.h">
       <Filter>include\grpc++\impl</Filter>
     </ClInclude>
@@ -225,6 +231,96 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\time.h">
       <Filter>include\grpc++\support</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h">
+      <Filter>include\grpc++\impl\codegen\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\secure_credentials.h">
@@ -266,6 +362,12 @@
     <Filter Include="include\grpc++\impl">
       <UniqueIdentifier>{0da8cd95-314f-da1b-5ce7-7791a5be1f1a}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc++\impl\codegen">
+      <UniqueIdentifier>{a3e7f28b-a7c7-7364-d402-edb1bfa414a4}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc++\impl\codegen\security">
+      <UniqueIdentifier>{20cbcf00-994a-300a-5184-bda96c6f45e4}</UniqueIdentifier>
+    </Filter>
     <Filter Include="include\grpc++\security">
       <UniqueIdentifier>{a80eb32b-1be9-1187-5f40-30d92accecc8}</UniqueIdentifier>
     </Filter>
@@ -281,6 +383,9 @@
     <Filter Include="src\cpp\client">
       <UniqueIdentifier>{7febf32a-d7a6-76fa-9e17-f189f591c062}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\cpp\codegen">
+      <UniqueIdentifier>{3c3e27f4-d3d9-3c42-5204-08b5e839f2de}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\cpp\common">
       <UniqueIdentifier>{2336e396-7e0b-8bf9-3b09-adc6ad1f0e5b}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
index 299fdaf773ff4341807bc879f4f59c2ee555811e..3d353716a9e5b1b3d49effee7a07ca42368384de 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
@@ -147,6 +147,8 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\end2end\test_service_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\util\byte_buffer_proto_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\cli_call.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\create_test_channel.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\string_ref_helper.h" />
@@ -177,6 +179,10 @@
     </ClCompile>
     <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\testing\duplicate\echo_duplicate.grpc.pb.h">
     </ClInclude>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\end2end\test_service_impl.cc">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\util\byte_buffer_proto_helper.cc">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\util\cli_call.cc">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\util\create_test_channel.cc">
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
index 70addd61b1d3d15a6e04a4f01324373991c29754..27ac6751b94c9cc6d22e5fdf3cf6bee87ff9998d 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
@@ -10,6 +10,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\duplicate\echo_duplicate.proto">
       <Filter>src\proto\grpc\testing\duplicate</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\end2end\test_service_impl.cc">
+      <Filter>test\cpp\end2end</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\util\byte_buffer_proto_helper.cc">
+      <Filter>test\cpp\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\util\cli_call.cc">
       <Filter>test\cpp\util</Filter>
     </ClCompile>
@@ -24,6 +30,12 @@
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\end2end\test_service_impl.h">
+      <Filter>test\cpp\end2end</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\util\byte_buffer_proto_helper.h">
+      <Filter>test\cpp\util</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\cli_call.h">
       <Filter>test\cpp\util</Filter>
     </ClInclude>
@@ -60,6 +72,9 @@
     <Filter Include="test\cpp">
       <UniqueIdentifier>{793efaa7-370f-c34a-d347-31fc4e0630e2}</UniqueIdentifier>
     </Filter>
+    <Filter Include="test\cpp\end2end">
+      <UniqueIdentifier>{1e6760f2-4cf7-1ecb-88a5-5faeec3c2150}</UniqueIdentifier>
+    </Filter>
     <Filter Include="test\cpp\util">
       <UniqueIdentifier>{bbe1e5b7-f4f9-8e32-ce7c-8c21afcf39d8}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index 2193321913a0ff5d63359eee1d7233ef877aa3a9..013d197dc037c6c8b39ee060e82761a2ffba9371 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -268,6 +268,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\client_unary_call.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\grpc_library.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\method_handler_impl.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\proto_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\rpc_method.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\rpc_service_method.h" />
@@ -300,6 +301,36 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\stub_options.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\sync_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\time.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h" />
@@ -363,6 +394,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\time.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 073b1812259602ec1e5a0c17ccfdf76392c33399..039348c7c233ead407f531e86550701974615664 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -82,6 +82,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\cpp\util\time.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+      <Filter>src\cpp\codegen</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\channel.h">
@@ -114,6 +117,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\grpc_library.h">
       <Filter>include\grpc++\impl</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\method_handler_impl.h">
+      <Filter>include\grpc++\impl</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\proto_utils.h">
       <Filter>include\grpc++\impl</Filter>
     </ClInclude>
@@ -210,6 +216,96 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\time.h">
       <Filter>include\grpc++\support</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h">
+      <Filter>include\grpc++\impl\codegen\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h">
@@ -242,6 +338,12 @@
     <Filter Include="include\grpc++\impl">
       <UniqueIdentifier>{dadc0002-f2ac-451b-a9b8-33b8de10b5fc}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc++\impl\codegen">
+      <UniqueIdentifier>{ccc364e2-3f28-8bfc-c26e-800dd6f9a9af}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc++\impl\codegen\security">
+      <UniqueIdentifier>{87cae06e-f40c-8fb6-73d6-26c7482ed9da}</UniqueIdentifier>
+    </Filter>
     <Filter Include="include\grpc++\security">
       <UniqueIdentifier>{64bf60ff-9192-bb59-dcc8-8a0021e1d016}</UniqueIdentifier>
     </Filter>
@@ -257,6 +359,9 @@
     <Filter Include="src\cpp\client">
       <UniqueIdentifier>{ff72923a-6499-8d2a-e0fb-6d574b85d77e}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\cpp\codegen">
+      <UniqueIdentifier>{18e9c249-37f0-7f2c-f026-502d48ed8c92}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\cpp\common">
       <UniqueIdentifier>{ed8e4daa-825f-fbe5-2a45-846ad9165d3d}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
index 6a70001e0ece2721ecbd86e61af41f8f178b48a2..6a0a706014f5140ce420c7861590ef568c1c3d0a 100644
--- a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
+++ b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
@@ -146,6 +146,58 @@
     </Link>
   </ItemDefinitionGroup>
 
+  <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_win32.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_win32.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
+  </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\config.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\config_protobuf.h" />
@@ -174,6 +226,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\compiler\ruby_generator.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+    </ClCompile>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
diff --git a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj.filters b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj.filters
index 133e1e33d9ca270e08be818ec1328943da5955e0..d43c419450ee5fbfe767b6cd7e4df4d6f3bf9f65 100644
--- a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj.filters
@@ -16,6 +16,161 @@
     <ClCompile Include="$(SolutionDir)\..\src\compiler\ruby_generator.cc">
       <Filter>src\compiler</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\cpp\codegen\grpc_library.cc">
+      <Filter>src\cpp\codegen</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\async_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\call_hook.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\channel_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\client_unary_call.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\completion_queue_tag.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\grpc_library.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\method_handler_impl.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\rpc_service_method.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\security\auth_context.h">
+      <Filter>include\grpc++\impl\codegen\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\serialization_traits.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_context.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\server_interface.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\service_type.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\status_code_enum.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\string_ref.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\stub_options.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_no_cxx11.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\sync_stream.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\time.h">
+      <Filter>include\grpc++\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\alloc.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_atomic.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_gcc_sync.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\atm_win32.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\grpc_types.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\log.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\port_platform.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\propagation_bits.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\slice_buffer.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\status.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_win32.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
+      <Filter>include\grpc\impl\codegen</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\support\config.h">
@@ -69,18 +224,42 @@
     <Filter Include="include">
       <UniqueIdentifier>{93ed419d-4540-7fa4-814d-3392745b77ff}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc">
+      <UniqueIdentifier>{ae5560ea-77fe-ab95-c7a3-4538c66591a8}</UniqueIdentifier>
+    </Filter>
     <Filter Include="include\grpc++">
       <UniqueIdentifier>{893c09ee-e315-e763-9d9d-37522ba2f51c}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc++\impl">
+      <UniqueIdentifier>{3e8c71a4-8a06-a577-2799-2224a1ad1f1b}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc++\impl\codegen">
+      <UniqueIdentifier>{ec2a6e26-915b-ba1b-4f59-f361dc01105c}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc++\impl\codegen\security">
+      <UniqueIdentifier>{c1593bf9-5ef8-cb28-e46b-543153918a3f}</UniqueIdentifier>
+    </Filter>
     <Filter Include="include\grpc++\support">
       <UniqueIdentifier>{1c34d005-1ffb-8a31-881a-c6bb431cda69}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\impl">
+      <UniqueIdentifier>{3c047248-00c2-4c59-fffd-9e313353e390}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="include\grpc\impl\codegen">
+      <UniqueIdentifier>{749ae941-63f0-c623-8b4b-a3114ec81bb7}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{94c9769a-a6cd-49fd-2b30-e52d2d02ed91}</UniqueIdentifier>
     </Filter>
     <Filter Include="src\compiler">
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+      <UniqueIdentifier>{29d80aab-9e9d-0417-6dfa-59dec47c9883}</UniqueIdentifier>
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+    <Filter Include="src\cpp\codegen">
+      <UniqueIdentifier>{c0d4a389-f341-8385-4534-fe9d8fb09952}</UniqueIdentifier>
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 </Project>
 
diff --git a/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj b/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj
new file mode 100644
index 0000000000000000000000000000000000000000..7bdc6c6674ef84b0a9a874fdc6d508f6e2227dd2
--- /dev/null
+++ b/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj
@@ -0,0 +1,207 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{2DBA9954-A78A-6F68-5669-0370C6D6080C}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\cpptest.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\protobuf.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>hybrid_end2end_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>hybrid_end2end_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\end2end\hybrid_end2end_test.cc">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc++_test_util\grpc++_test_util.vcxproj">
+      <Project>{0BE77741-552A-929B-A497-4EF7ECE17A64}</Project>
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+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
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+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc++\grpc++.vcxproj">
+      <Project>{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
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+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
+      <Project>{EAB0A629-17A9-44DB-B5FF-E91A721FE037}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
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+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
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+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
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+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
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+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
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+</Project>
+
diff --git a/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj.filters b/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj.filters
new file mode 100644
index 0000000000000000000000000000000000000000..ebb9753af16320e4efca2d31705961e5215b7bfc
--- /dev/null
+++ b/vsprojects/vcxproj/test/hybrid_end2end_test/hybrid_end2end_test.vcxproj.filters
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\end2end\hybrid_end2end_test.cc">
+      <Filter>test\cpp\end2end</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="test">
+      <UniqueIdentifier>{034a7201-59db-54c2-0af5-fd686ce948b6}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\cpp">
+      <UniqueIdentifier>{2bb7ef60-02e9-bb7c-6a37-4d8e2d8870ec}</UniqueIdentifier>
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+</Project>
+