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/* ************************************************************************
* Copyright 2013 Advanced Micro Devices, Inc.
*
* 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.
* ************************************************************************/
#include "timer.h"
#if defined(_MSC_VER)
#include <windows.h>
nano_time_t
conv2nanosec(nano_time_t t)
{
LARGE_INTEGER count;
if (QueryPerformanceFrequency(&count) == FALSE) {
return 0;
}
t = (t * 1000000)/count.QuadPart;
return (nano_time_t)(t * 1000);
}
nano_time_t
conv2microsec(nano_time_t t)
{
LARGE_INTEGER count;
if (QueryPerformanceFrequency(&count) == FALSE) {
return 0;
}
return (t * 1000000ULL)/count.QuadPart;
}
nano_time_t
conv2millisec(nano_time_t t)
{
LARGE_INTEGER count;
if (QueryPerformanceFrequency(&count) == FALSE) {
return 0;
}
return (t * 1000) / count.QuadPart;
}
nano_time_t
getCurrentTime(void)
{
LARGE_INTEGER count;
if (QueryPerformanceCounter(&count) == FALSE) {
return 0;
}
return (nano_time_t)count.QuadPart;
}
void
sleepTime(nano_time_t time) {
DWORD tms = (DWORD)(time/1000000);
Sleep(tms);
}
#else /* defined(_MCS_VER) */
#include <time.h>
#if defined(__APPLE__) && defined(__MACH__)
#include <assert.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#include <pthread.h>
// see https://developer.apple.com/library/mac/qa/qa1398/_index.html
static mach_timebase_info_data_t mtb_;
static void
init_timebase_conv_(void)
{
kern_return_t err;
err = mach_timebase_info(&mtb_);
assert(err == KERN_SUCCESS);
}
nano_time_t
getCurrentTime(void)
{
static pthread_once_t once = PTHREAD_ONCE_INIT;
uint64_t now;
pthread_once(&once, init_timebase_conv_);
now = mach_absolute_time();
return (now * mtb_.numer) / mtb_.denom;
}
#else /* ! (_MCS_VER || __APPLE__) */
nano_time_t
getCurrentTime(void)
{
int err;
struct timespec t;
err = clock_gettime(CLOCK_REALTIME, &t);
if (err == 0) {
return (t.tv_sec * 1000000000UL + t.tv_nsec);
}
return 0;
}
#endif
nano_time_t
conv2nanosec(nano_time_t t)
{
/* clock_... functions measure time in nanoseconds */
return t;
}
nano_time_t
conv2microsec(nano_time_t t)
{
return t/1000;
}
nano_time_t
conv2millisec(nano_time_t t)
{
return t/1000000;
}
void
sleepTime(nano_time_t time) {
struct timespec t1;
t1.tv_sec = 0;
t1.tv_nsec = time;
nanosleep(&t1, NULL);
}
// namespace )
#endif /* defined(_MCS_VER) */
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