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/*
* timer.c
* by Jon Kinsey, 2003
*
* Accurate win32 timer or default timer
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 3 or later of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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
*
* $Id: timer.c,v 1.13 2008/03/13 18:15:57 Superfly_Jon Exp $
*/
#include "config.h"
#include "backgammon.h"
#include <time.h>
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef WIN32
#include "windows.h"
static double perFreq = 0;
static int setup_timer()
{
LARGE_INTEGER freq;
if (!QueryPerformanceFrequency(&freq))
{ /* Timer not supported */
return 0;
}
else
{
perFreq = ((double)freq.QuadPart) / 1000;
return 1;
}
}
double get_time()
{ /* Return elapsed time in milliseconds */
LARGE_INTEGER timer;
if (!perFreq)
{
if (!setup_timer())
return clock() / 1000.0;
}
QueryPerformanceCounter(&timer);
return timer.QuadPart / perFreq;
}
#else
#if 1
double get_time(void)
{ /* Return elapsed time in milliseconds */
struct timeval tv;
gettimeofday(&tv, 0);
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
#else
static double perFreq = 0;
int setup_timer()
{
perFreq = __get_clockfreq() / 1000.0;
return 1;
}
double get_time()
{ /* Return elapsed time in milliseconds */
if (!perFreq)
{
if (!setup_timer())
return clock() / 1000.0;
}
{
unsigned long long int val;
__asm__ __volatile__("rdtsc" : "=A" (val) : );
return val / perFreq;
}
}
#endif
#endif
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