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/**************************************************************************
*
* Copyright 2014, 2017 The Android Open Source Project
*
* 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.
*
* Ported from drawElements Utility Library (Google, Inc.)
* Port done by: Ian Elliott <ianelliott@google.com>
**************************************************************************/
#include <time.h>
#include <assert.h>
#include <vulkan/vk_platform.h>
#if defined(_WIN32)
#include <windows.h>
#elif defined(__unix__) || defined(__linux) || defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__ANDROID__) || defined(__EPOC32__) || defined(__QNX__)
#include <time.h>
#elif defined(__APPLE__)
#include <sys/time.h>
#endif
uint64_t getTimeInNanoseconds(void) {
const long long ns_in_us = 1000;
const long long ns_in_ms = 1000 * ns_in_us;
const long long ns_in_s = 1000 * ns_in_ms;
#if defined(_WIN32)
LARGE_INTEGER freq;
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
QueryPerformanceFrequency(&freq);
assert(freq.LowPart != 0 || freq.HighPart != 0);
if (count.QuadPart < MAXLONGLONG / ns_in_s) {
assert(freq.QuadPart != 0);
return count.QuadPart * ns_in_s / freq.QuadPart;
} else {
assert(freq.QuadPart >= ns_in_s);
return count.QuadPart / (freq.QuadPart / ns_in_s);
}
#elif defined(__unix__) || defined(__linux) || defined(__linux__) || defined(__ANDROID__) || defined(__QNX__)
struct timespec currTime;
clock_gettime(CLOCK_MONOTONIC, &currTime);
return (uint64_t)currTime.tv_sec * ns_in_s + (uint64_t)currTime.tv_nsec;
#elif defined(__EPOC32__)
struct timespec currTime;
/* Symbian supports only realtime clock for clock_gettime. */
clock_gettime(CLOCK_REALTIME, &currTime);
return (uint64_t)currTime.tv_sec * ns_in_s + (uint64_t)currTime.tv_nsec;
#elif defined(__APPLE__)
struct timeval currTime;
gettimeofday(&currTime, NULL);
return (uint64_t)currTime.tv_sec * ns_in_s + (uint64_t)currTime.tv_usec * ns_in_us;
#else
#error getTimeInNanoseconds Not implemented for target OS
#endif
}
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