timer.h

Go to the documentation of this file.

/*
 Copyright (C) 2001-2006, William Joseph.
 All Rights Reserved.

 This file is part of GtkRadiant.

 GtkRadiant is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 GtkRadiant 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 GtkRadiant; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined (INCLUDED_TIMER_H)
#define INCLUDED_TIMER_H

const int msec_per_sec = 1000;

class MillisecondTime
{
        unsigned int m_milliseconds;
    public:
        MillisecondTime (unsigned int milliseconds) :
            m_milliseconds(milliseconds)
        {
        }
        MillisecondTime ()
        {
        }
        static MillisecondTime current ();

        unsigned int milliseconds_since (const MillisecondTime& other) const
        {
            return m_milliseconds - other.m_milliseconds;
        }
};

template<typename tick_type>
inline MillisecondTime time_from_ticks (tick_type tick_count, tick_type ticks_per_sec)
{
    return MillisecondTime(static_cast<unsigned int> (tick_count / static_cast<double> (ticks_per_sec / msec_per_sec)));
}

class Timer
{
        MillisecondTime m_start;

    public:
        void start ()
        {
            m_start = MillisecondTime::current();
        }
        unsigned int elapsed_msec ()
        {
            return MillisecondTime::current().milliseconds_since(m_start);
        }
};

#endif