alarm.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_ALARM_H
#define GRPCPP_ALARM_H
 
#include <functional>
 
#include <grpc/grpc.h>
#include <grpcpp/impl/codegen/completion_queue.h>
#include <grpcpp/impl/codegen/completion_queue_tag.h>
#include <grpcpp/impl/codegen/grpc_library.h>
#include <grpcpp/impl/codegen/time.h>
#include <grpcpp/impl/grpc_library.h>
 
namespace grpc {
 
class Alarm : private ::grpc::GrpcLibraryCodegen {
 public:
  Alarm();
 
  ~Alarm() override;
 
  template <typename T>
  Alarm(::grpc::CompletionQueue* cq, const T& deadline, void* tag) : Alarm() {
    SetInternal(cq, ::grpc::TimePoint<T>(deadline).raw_time(), tag);
  }
 
  template <typename T>
  void Set(::grpc::CompletionQueue* cq, const T& deadline, void* tag) {
    SetInternal(cq, ::grpc::TimePoint<T>(deadline).raw_time(), tag);
  }
 
  Alarm(const Alarm&) = delete;
  Alarm& operator=(const Alarm&) = delete;
 
  Alarm(Alarm&& rhs) noexcept : alarm_(rhs.alarm_) { rhs.alarm_ = nullptr; }
  Alarm& operator=(Alarm&& rhs) noexcept {
    alarm_ = rhs.alarm_;
    rhs.alarm_ = nullptr;
    return *this;
  }
 
  void Cancel();
 
#ifdef GRPC_CALLBACK_API_NONEXPERIMENTAL
  template <typename T>
  void Set(const T& deadline, std::function<void(bool)> f) {
    SetInternal(::grpc::TimePoint<T>(deadline).raw_time(), std::move(f));
  }
#endif
 
  class experimental_type {
   public:
    explicit experimental_type(Alarm* alarm) : alarm_(alarm) {}
 
    template <typename T>
    void Set(const T& deadline, std::function<void(bool)> f) {
      alarm_->SetInternal(::grpc::TimePoint<T>(deadline).raw_time(),
                          std::move(f));
    }
 
   private:
    Alarm* alarm_;
  };
 
  experimental_type experimental() { return experimental_type(this); }
 
 private:
  void SetInternal(::grpc::CompletionQueue* cq, gpr_timespec deadline,
                   void* tag);
  void SetInternal(gpr_timespec deadline, std::function<void(bool)> f);
 
  ::grpc::internal::CompletionQueueTag* alarm_;
};
 
}  // namespace grpc
 
#endif  // GRPCPP_ALARM_H