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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "lib/extras/time.h"
#include <stdint.h>
#include <stdlib.h>
#include <ctime>
#include "lib/jxl/base/os_macros.h" // for JXL_OS_*
#if JXL_OS_WIN
#ifndef NOMINMAX
#define NOMINMAX
#endif // NOMINMAX
#include <windows.h>
#endif // JXL_OS_WIN
#if JXL_OS_MAC
#include <mach/mach.h>
#include <mach/mach_time.h>
#endif // JXL_OS_MAC
#if JXL_OS_HAIKU
#include <OS.h>
#endif // JXL_OS_HAIKU
namespace jxl {
double Now() {
#if JXL_OS_WIN
LARGE_INTEGER counter;
(void)QueryPerformanceCounter(&counter);
LARGE_INTEGER freq;
(void)QueryPerformanceFrequency(&freq);
return double(counter.QuadPart) / freq.QuadPart;
#elif JXL_OS_MAC
const auto t = mach_absolute_time();
// On OSX/iOS platform the elapsed time is cpu time unit
// We have to query the time base information to convert it back
// See https://developer.apple.com/library/mac/qa/qa1398/_index.html
static mach_timebase_info_data_t timebase;
if (timebase.denom == 0) {
(void)mach_timebase_info(&timebase);
}
return double(t) * timebase.numer / timebase.denom * 1E-9;
#elif JXL_OS_HAIKU
return double(system_time_nsecs()) * 1E-9;
#else
timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
return t.tv_sec + t.tv_nsec * 1E-9;
#endif
}
} // namespace jxl
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