/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 * All rights reserved.

 *

 * 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 F_VARIABLE_TRACER_H

#define F_VARIABLE_TRACER_H

#include "callback-trace-source.h"

#include "trace-source.h"

#include <stdint.h>

namespace ns3 {

class FVTraceSourceBase : public TraceSource {

public:

  typedef CallbackTraceSource<double, double> ChangeNotifyCallback;

  FVTraceSourceBase () {}

  FVTraceSourceBase (FVTraceSourceBase const &o) {}

  FVTraceSourceBase &operator = (FVTraceSourceBase const &o) {

      return *this;

  }

  ~FVTraceSourceBase () {}

  virtual void AddCallback (CallbackBase const & callback, TraceContext const & context) {

    m_callback.AddCallback (callback, context);

  }

  virtual void RemoveCallback (CallbackBase const & callback) {

    m_callback.RemoveCallback (callback);

  }

protected:

  void notify (double oldVal, double newVal) {

      if (oldVal != newVal) 

        {

          m_callback (oldVal, newVal);

        }

  }

private:

  ChangeNotifyCallback m_callback;

};

template <typename T>

class FVTraceSource : public FVTraceSourceBase 

{

public:

};

}; // namespace ns3

#endif /* F_VARIABLE_TRACER_H */