alarm.h

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#ifndef GRPCXX_ALARM_H
#define GRPCXX_ALARM_H

#include <grpc++/impl/codegen/completion_queue_tag.h>
#include <grpc++/impl/codegen/grpc_library.h>
#include <grpc++/impl/codegen/time.h>

struct grpc_alarm;

namespace grpc {

class CompletionQueue;

class Alarm : private GrpcLibrary {
 public:
  Alarm(CompletionQueue* cq, gpr_timespec deadline, void* tag);

  ~Alarm();

  void Cancel();

 private:
  class AlarmEntry : public CompletionQueueTag {
   public:
    AlarmEntry(void* tag) : tag_(tag) {}
    bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
      *tag = tag_;
      return true;
    }

   private:
    void* tag_;
  };

  AlarmEntry tag_;
  grpc_alarm* const alarm_;  // owned
};

}  // namespace grpc

#endif  // GRPCXX_ALARM_H