Extern "C" Python DLL support

src/python/grpcio/grpc/_cython/imports.generated.c

@@ -296,6 +296,10 @@ gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
 gpr_thd_currentid_type gpr_thd_currentid_import;
 gpr_thd_join_type gpr_thd_join_import;
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cpluslus */
+
 void pygrpc_load_imports(HMODULE library) {
   census_initialize_import = (census_initialize_type) GetProcAddress(library, "census_initialize");
   census_shutdown_import = (census_shutdown_type) GetProcAddress(library, "census_shutdown");
@@ -557,4 +561,8 @@ void pygrpc_load_imports(HMODULE library) {
   gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
 }
 
+#ifdef __cplusplus
+}
+#endif  /* __cpluslus */
+
 #endif /* !GPR_WIN32 */

src/python/grpcio/grpc/_cython/imports.generated.h

@@ -836,8 +836,16 @@ typedef void(*gpr_thd_join_type)(gpr_thd_id t);
 extern gpr_thd_join_type gpr_thd_join_import;
 #define gpr_thd_join gpr_thd_join_import
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cpluslus */
+
 void pygrpc_load_imports(HMODULE library);
 
+#ifdef __cplusplus
+}
+#endif  /* __cpluslus */
+
 #else /* !GPR_WIN32 */
 
 #include <grpc/support/alloc.h>

src/python/grpcio/grpc/_cython/loader.c

@@ -33,6 +33,10 @@
 
 #include "loader.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cpluslus  */
+
 #if GPR_WIN32
 
 int pygrpc_load_core(char *path) {
@@ -56,4 +60,9 @@ int pygrpc_load_core(char *path) {
 
 int pygrpc_load_core(char *path) { return 1; }
 
-#endif
+#endif  /* !GPR_WIN32 */
+
+#ifdef __cplusplus
+}
+#endif  /* __cpluslus */
+

src/python/grpcio/grpc/_cython/loader.h

@@ -39,7 +39,16 @@
 /* Additional inclusions not covered by "imports.generated.h" */
 #include <grpc/byte_buffer_reader.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cpluslus */
+
 /* Attempts to load the core if necessary, and return non-zero upon succes. */
 int pygrpc_load_core(char *path);
 
+#ifdef __cplusplus
+}
+#endif  /* __cpluslus */
+
 #endif /* GRPC_RB_BYTE_BUFFER_H_ */
+

templates/src/python/grpcio/grpc/_cython/imports.generated.c.template

@@ -43,10 +43,19 @@
   ${api.name}_type ${api.name}_import;
   %endfor
 
+  #ifdef __cplusplus
+  extern "C" {
+  #endif  /* __cpluslus */
+
   void pygrpc_load_imports(HMODULE library) {
   %for api in c_apis:
     ${api.name}_import = (${api.name}_type) GetProcAddress(library, "${api.name}");
   %endfor
   }
 
+  #ifdef __cplusplus
+  }
+  #endif  /* __cpluslus */
+
   #endif /* !GPR_WIN32 */
+

templates/src/python/grpcio/grpc/_cython/imports.generated.h.template

@@ -52,8 +52,16 @@
   #define ${api.name} ${api.name}_import
   %endfor
 
+  #ifdef __cplusplus
+  extern "C" {
+  #endif  /* __cpluslus */
+
   void pygrpc_load_imports(HMODULE library);
 
+  #ifdef __cplusplus
+  }
+  #endif  /* __cpluslus */
+
   #else /* !GPR_WIN32 */
 
   #include <grpc/support/alloc.h>