include/grpcpp/impl/codegen/time.h

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/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 
#ifndef GRPCPP_IMPL_CODEGEN_TIME_H
#define GRPCPP_IMPL_CODEGEN_TIME_H
 
// IWYU pragma: private, include <grpcpp/support/time.h>
 
#include <chrono>
 
#include <grpc/impl/codegen/grpc_types.h>
#include <grpcpp/impl/codegen/config.h>
 
namespace grpc {
 
template <typename T>
class TimePoint {
 public:
  // If you see the error with methods below, you may need either
  // i) using the existing types having a conversion class such as
  // gpr_timespec and std::chrono::system_clock::time_point or
  // ii) writing a new TimePoint<YourType> to address your case.
  TimePoint(const T& /*time*/) = delete;
  gpr_timespec raw_time() = delete;
};
 
template <>
class TimePoint<gpr_timespec> {
 public:
  /* NOLINTNEXTLINE(google-explicit-constructor) */
  TimePoint(const gpr_timespec& time) : time_(time) {}
  gpr_timespec raw_time() { return time_; }
 
 private:
  gpr_timespec time_;
};
 
}  // namespace grpc
 
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:
  /* NOLINTNEXTLINE(google-explicit-constructor) */
  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  // GRPCPP_IMPL_CODEGEN_TIME_H