time.c

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/*
 * $Id: time.c 35246 2011-02-27 20:37:56Z jesterking $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "PIL_time.h"

#ifdef WIN32
#include <windows.h>

double PIL_check_seconds_timer(void) 
{
        static int hasperfcounter= -1; /* -1==unknown */
        static double perffreq;

        if (hasperfcounter==-1) {
                __int64 ifreq;
                hasperfcounter= QueryPerformanceFrequency((LARGE_INTEGER*) &ifreq);
                perffreq= (double) ifreq;
        } 

        if (hasperfcounter) {
                __int64 count;

                QueryPerformanceCounter((LARGE_INTEGER*) &count);

                return count/perffreq;
        } else {
                static double accum= 0.0;
                static int ltick= 0;
                int ntick= GetTickCount();

                if (ntick<ltick) {
                        accum+= (0xFFFFFFFF-ltick+ntick)/1000.0;
                } else {
                        accum+= (ntick-ltick)/1000.0;
                }

                ltick= ntick;
                return accum;
        }
}

void PIL_sleep_ms(int ms)
{
        Sleep(ms);
}

#else

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

double PIL_check_seconds_timer(void) 
{
        struct timeval tv;
        struct timezone tz;

        gettimeofday(&tv, &tz);

        return ((double) tv.tv_sec + tv.tv_usec/1000000.0);
}

void PIL_sleep_ms(int ms)
{
        if (ms>=1000) {
                sleep(ms/1000);
                ms= (ms%1000);
        }
        
        usleep(ms*1000);
}

#endif