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misc/timer.h

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#ifndef MISC_TIMER_H
#define MISC_TIMER_H

/*

  GLT OpenGL C++ Toolkit (LGPL)
  Copyright (C) 2000-2002 Nigel Stewart  

  Email: nigels.com@gmail.com   
  WWW:   http://www.nigels.com/glt/

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <glt/config.h>

#include <ctime>
#include <iosfwd>

#ifdef GLT_UNIX
#include <sys/time.h>
#endif

class Timer
{
public:
    /*
        Interface for individual timers.
    */

    Timer();
    Timer(std::ostream &);
    ~Timer();

    double elapsed() const;

    clock_t clock() const;

    void start();

    /*
        Interface for controlling
        time globally.
    */

    static void freeze();
    
    static void unFreeze();
    
    static void advance(const uint32 msec);

private:

    #ifdef GLT_WIN32
           clock_t _start;
           clock_t _end;
    static clock_t _frozen;
    #endif

    #ifdef GLT_UNIX
           timeval _start;
           timeval _end;
    static timeval _frozen;
    #endif

    static uint32 _frozenCount;

    std::ostream *_os;
};

#endif

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