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/*
* libcaca ASCII-Art library
* Copyright (c) 2002, 2003, 2004 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* 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 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
*/
/** \file time.c
* \version \$Id: time.c 241 2004-01-13 09:55:32Z sam $
* \author Sam Hocevar <sam@zoy.org>
* \brief Timer routines
*
* This file contains simple timer routines.
*/
#include "config.h"
#include <stdlib.h>
#if defined(HAVE_SYS_TIME_H)
# include <sys/time.h>
#endif
#include <time.h>
#if defined(USE_WIN32)
# include <windows.h>
#endif
#if defined(HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include "caca.h"
#include "caca_internals.h"
void _caca_sleep(unsigned int usec)
{
#if defined(HAVE_USLEEP)
usleep(usec);
#elif defined(HAVE_SLEEP)
Sleep(usec / 1000);
#else
SLEEP
#endif
}
unsigned int _caca_getticks(struct caca_timer *timer)
{
#if defined(HAVE_GETTIMEOFDAY)
struct timeval tv;
#elif defined(USE_WIN32)
static __int64 freq = -1;
unsigned __int64 usec;
#endif
unsigned int ticks = 0;
int new_sec, new_usec;
#if defined(HAVE_GETTIMEOFDAY)
gettimeofday(&tv, NULL);
new_sec = tv.tv_sec;
new_usec = tv.tv_usec;
#elif defined(USE_WIN32)
if(freq == -1)
{
if(!QueryPerformanceFrequency((LARGE_INTEGER *)&freq))
freq = 0;
}
QueryPerformanceCounter((LARGE_INTEGER *)&usec);
new_sec = (int)(usec * 1000000 / freq / 1000000);
new_usec = (int)((usec * 1000000 / freq) % 1000000);
#endif
if(timer->last_sec != 0)
{
/* If the delay was greater than 60 seconds, return 10 seconds
* otherwise we may overflow our ticks counter. */
if(new_sec >= timer->last_sec + 60)
ticks = 60 * 1000000;
else
{
ticks = (new_sec - timer->last_sec) * 1000000;
ticks += new_usec;
ticks -= timer->last_usec;
}
}
timer->last_sec = new_sec;
timer->last_usec = new_usec;
return ticks;
}
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