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openacc/timer.h
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TIMER_H
#define TIMER_H
#include <stdlib.h>
#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <sys/time.h>
/* RR: Apparently if no BSD or mac, this is missing */
#ifndef __USE_BSD
# define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif /* BSD */
#endif
#ifdef WIN32
double PCFreq = 0.0;
__int64 timerStart = 0;
#else
struct timeval timerStart;
#endif
void StartTimer()
{
#ifdef WIN32
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
printf("QueryPerformanceFrequency failed!
");
PCFreq = (double)li.QuadPart/1000.0;
QueryPerformanceCounter(&li);
timerStart = li.QuadPart;
#else
gettimeofday(&timerStart, NULL);
#endif
}
// time elapsed in ms
double GetTimer()
{
#ifdef WIN32
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return (double)(li.QuadPart-timerStart)/PCFreq;
#else
struct timeval timerStop, timerElapsed;
gettimeofday(&timerStop, NULL);
timersub(&timerStop, &timerStart, &timerElapsed);
return timerElapsed.tv_sec*1000.0+timerElapsed.tv_usec/1000.0;
#endif
}
#endif // TIMER_H
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