helpers.h

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#ifndef TEST_CPP_MICROBENCHMARKS_COUNTERS_H
#define TEST_CPP_MICROBENCHMARKS_COUNTERS_H

#include <sstream>

extern "C" {
#include <grpc/support/port_platform.h>
#include "test/core/util/memory_counters.h"
}

#include <grpc++/impl/grpc_library.h>
#include "third_party/benchmark/include/benchmark/benchmark.h"

class Library {
 public:
  static Library& get() {
    static Library lib;
    return lib;
  }

  grpc_resource_quota* rq() { return rq_; }

 private:
  Library() {
#ifdef GPR_LOW_LEVEL_COUNTERS
    grpc_memory_counters_init();
#endif
    init_lib_.init();
    rq_ = grpc_resource_quota_create("bm");
  }

  ~Library() { init_lib_.shutdown(); }

  grpc::internal::GrpcLibrary init_lib_;
  grpc_resource_quota* rq_;
};

#ifdef GPR_LOW_LEVEL_COUNTERS
extern "C" gpr_atm gpr_mu_locks;
extern "C" gpr_atm gpr_counter_atm_cas;
extern "C" gpr_atm gpr_counter_atm_add;
#endif

class TrackCounters {
 public:
  virtual void Finish(benchmark::State& state);
  virtual void AddToLabel(std::ostream& out, benchmark::State& state);

 private:
#ifdef GPR_LOW_LEVEL_COUNTERS
  const size_t mu_locks_at_start_ = gpr_atm_no_barrier_load(&gpr_mu_locks);
  const size_t atm_cas_at_start_ =
      gpr_atm_no_barrier_load(&gpr_counter_atm_cas);
  const size_t atm_add_at_start_ =
      gpr_atm_no_barrier_load(&gpr_counter_atm_add);
  grpc_memory_counters counters_at_start_ = grpc_memory_counters_snapshot();
#endif
};

#endif