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// timer.cc
// robert - programme du robot 2005. {{{
//
// Copyright (C) 2005 Nicolas Schodet
//
// Robot APB Team/Efrei 2005.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// This program 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.
// 
// 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.
//
// }}}
#include "timer.hh"

#include <sys/time.h>
#include <time.h>

/// Retourne le temps depuis le d�but du programme en millisecondes.
int
Timer::getProgramTime (void)
{
    Timer &timer = getInstance ();
    return getSystemTime () - timer.programStart_;
}

/// Retourne le temps depuis le d�but du match en millisecondes.
int
Timer::getRoundTime (void)
{
    Timer &timer = getInstance ();
    return timer.roundStart_ != -1 ? getSystemTime () - timer.roundStart_ : 0;
}

/// D�mare le match et enregistre le temps de d�part.
void
Timer::startRound (void)
{
    Timer &timer = getInstance ();
    timer.roundStart_ = getSystemTime ();
}

/// Attend un nombre de millisecondes. Attention, le robot ne fait absolument
/// rien pendant cette periode !
void
Timer::wait (int t)
{
    timespec ts, r;
    ts.tv_sec = t / 1000;
    ts.tv_nsec = (t % 1000) * 1000000;
    nanosleep (&ts, &r);
}

/// Retourne une r�f�rence vers l'instance unique.
Timer &
Timer::getInstance (void)
{
    static Timer instance;
    return instance;
}

/// Retourne la date syst�me.
long long
Timer::getSystemTime (void)
{
    timeval tv;
    gettimeofday (&tv, 0);
    return ((long long) tv.tv_sec % 1000000) * 1000
	+ (long long) tv.tv_usec / 1000;
}

/// Constructeur.
Timer::Timer (void)
{
    programStart_ = getSystemTime ();
    roundStart_ = -1;
}