timer.h

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2007 INRIA
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */
#ifndef TIMER_H
#define TIMER_H
 
#include "fatal-error.h"
#include "nstime.h"
#include "event-id.h"
#include "int-to-type.h"
 
namespace ns3 {
 
class TimerImpl;
 
class Timer
{
public:
  enum DestroyPolicy
  {
    CANCEL_ON_DESTROY = (1 << 3),
    REMOVE_ON_DESTROY = (1 << 4),
    CHECK_ON_DESTROY = (1 << 5)
  };
  enum State
  {
    RUNNING,    
    EXPIRED,    
    SUSPENDED,  
  };
  Timer ();
  Timer (enum DestroyPolicy destroyPolicy);
  ~Timer ();
 
  template <typename FN>
  void SetFunction (FN fn);
 
  template <typename MEM_PTR, typename OBJ_PTR>
  void SetFunction (MEM_PTR memPtr, OBJ_PTR objPtr);
 
 
  template <typename... Ts>
  void SetArguments (Ts... args);
 
  void SetDelay (const Time &delay);
  Time GetDelay (void) const;
  Time GetDelayLeft (void) const;
  void Cancel (void);
  void Remove (void);
  bool IsExpired (void) const;
  bool IsRunning (void) const;
  bool IsSuspended (void) const;
  enum Timer::State GetState (void) const;
  void Schedule (void);
  void Schedule (Time delay);
 
  void Suspend (void);
  void Resume (void);
 
private:
  enum InternalSuspended
  {
    TIMER_SUSPENDED = (1 << 7)  
  };
 
  int m_flags;
  Time m_delay;
  EventId m_event;
  TimerImpl *m_impl;
  Time m_delayLeft;
};
 
} // namespace ns3
 
 
/********************************************************************
 *  Implementation of the templates declared above.
 ********************************************************************/
 
#include "timer-impl.h"
 
namespace ns3 {
 
 
template <typename FN>
void
Timer::SetFunction (FN fn)
{
  delete m_impl;
  m_impl = MakeTimerImpl (fn);
}
template <typename MEM_PTR, typename OBJ_PTR>
void
Timer::SetFunction (MEM_PTR memPtr, OBJ_PTR objPtr)
{
  delete m_impl;
  m_impl = MakeTimerImpl (memPtr, objPtr);
}
 
template <typename... Ts>
void
Timer::SetArguments (Ts... args)
{
  if (m_impl == 0)
    {
      NS_FATAL_ERROR ("You cannot set the arguments of a Timer before setting its function.");
      return;
    }
  m_impl->SetArgs (args...);
}
 
} // namespace ns3
 
#endif /* TIMER_H */