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

/*

 * Copyright (c) 2005,2006 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 TIME_H

#define TIME_H

#include <stdint.h>

namespace ns3 {

/**

 * \brief simulation time

 *

 * This class is used by the user to specify when a scheduled event

 * is expected to expire (see ns3::Simulator::schedule).

 */

class Time {

 public:

  Time (Time const &o);

  Time &operator = (Time const &o);

  bool IsNegative (void) const;

  bool IsPositive (void) const;

  bool IsStrictlyNegative (void) const;

  bool IsStrictlyPositive (void) const;

  bool IsZero (void) const;

  Time operator += (Time const &o);

  Time operator -= (Time const &o);

  double ApproximateToSeconds (void) const;

  int64_t ApproximateToMilliSeconds (void) const;  

  int64_t ApproximateToMicroSeconds (void) const;

  int64_t ApproximateToNanoSeconds (void) const;

 protected:

  Time (int64_t ns);

 private:

  Time ();

  int64_t m_ns;

};

Time operator + (Time const &lhs, Time const &rhs);

Time operator - (Time const &lhs, Time const &rhs);

bool operator == (Time const &lhs, Time const &rhs);

bool operator != (Time const &lhs, Time const &rhs);

bool operator <  (Time const &lhs, Time const &rhs);

bool operator <= (Time const &lhs, Time const &rhs);

bool operator >  (Time const &lhs, Time const &rhs);

bool operator >= (Time const &lhs, Time const &rhs);

class Now : public Time {

public:

  Now ();

};

class Seconds : public Time 

{

public:

  Seconds (double s);

};

class MilliSeconds : public Time 

{

public:

  MilliSeconds (int32_t ms);

};

class MicroSeconds : public Time 

{

public:

  MicroSeconds (int32_t us);

};

class NanoSeconds : public Time 

{

public:

  NanoSeconds (int64_t ns);

};

}; // namespace ns3

#endif /* TIME_H */