// excerpts from http://code.google.com/p/muduo/
//
// Use of this source code is governed by a BSD-style license
// that can be found in the License file.
//
// Author: Shuo Chen (chenshuo at chenshuo dot com)

#ifndef MUDUO_NET_TIMER_H
#define MUDUO_NET_TIMER_H

#include <boost/noncopyable.hpp>

#include "datetime/Timestamp.h"
#include "thread/Atomic.h"
#include "Callbacks.h"

namespace muduo
{

///
/// Internal class for timer event.
///
class Timer : boost::noncopyable
{
 public:
  Timer(const TimerCallback& cb, Timestamp when, double interval)
    : callback_(cb),
      expiration_(when),
      interval_(interval),
      repeat_(interval > 0.0),
      sequence_(s_numCreated_.incrementAndGet())
  {
  }

  void run() const
  {
    callback_();
  }

  Timestamp expiration() const  { return expiration_; }
  bool repeat() const { return repeat_; }
  int64_t sequence() const { return sequence_; }

  void restart(Timestamp now);

 private:
  const TimerCallback callback_;
  Timestamp expiration_;
  const double interval_;
  const bool repeat_;
  const int64_t sequence_;

  static AtomicInt64 s_numCreated_;
};

}
#endif  // MUDUO_NET_TIMER_H