time.c

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/*
 * 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.
 */
 
#include "PIL_time.h"
 
#ifdef WIN32
#  define WIN32_LEAN_AND_MEAN
#  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;
  }
}
 
long int PIL_check_seconds_timer_i(void)
{
  return (long int)PIL_check_seconds_timer();
}
 
void PIL_sleep_ms(int ms)
{
  Sleep(ms);
}
 
#else
 
#  include <sys/time.h>
#  include <unistd.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);
}
 
long int PIL_check_seconds_timer_i(void)
{
  struct timeval tv;
  struct timezone tz;
 
  gettimeofday(&tv, &tz);
 
  return tv.tv_sec;
}
 
void PIL_sleep_ms(int ms)
{
  if (ms >= 1000) {
    sleep(ms / 1000);
    ms = (ms % 1000);
  }
 
  usleep(ms * 1000);
}
 
#endif