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/*
* C11 <time.h> implementation
*
* (C) Copyright yohhoy 2012.
* Copyright 2022 Yonggang Luo
* Distributed under the Boost Software License, Version 1.0.
*
* Permission is hereby granted, free of charge, to any person or organization
* obtaining a copy of the software and accompanying documentation covered by
* this license (the "Software") to use, reproduce, display, distribute,
* execute, and transmit the Software, and to prepare [[derivative work]]s of the
* Software, and to permit third-parties to whom the Software is furnished to
* do so, all subject to the following:
*
* The copyright notices in the Software and this entire statement, including
* the above license grant, this restriction and the following disclaimer,
* must be included in all copies of the Software, in whole or in part, and
* all derivative works of the Software, unless such copies or derivative
* works are solely in the form of machine-executable object code generated by
* a source language processor.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "c11/time.h"
#ifndef HAVE_TIMESPEC_GET
#if defined(_WIN32) && !defined(HAVE_PTHREAD)
#include <windows.h>
int
timespec_get(struct timespec *ts, int base)
{
/* difference between 1970 and 1601 */
#define _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS 116444736000000000ull
/* 1 tick is 100 nanoseconds */
#define _TIMESPEC_IMPL_TICKS_PER_SECONDS 10000000ull
if (!ts)
return 0;
if (base == TIME_UTC) {
FILETIME ft;
ULARGE_INTEGER date;
LONGLONG ticks;
GetSystemTimeAsFileTime(&ft);
date.HighPart = ft.dwHighDateTime;
date.LowPart = ft.dwLowDateTime;
ticks = (LONGLONG)(date.QuadPart - _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS);
ts->tv_sec = ticks / _TIMESPEC_IMPL_TICKS_PER_SECONDS;
ts->tv_nsec = (ticks % _TIMESPEC_IMPL_TICKS_PER_SECONDS) * 100;
return base;
}
return 0;
#undef _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS
#undef _TIMESPEC_IMPL_TICKS_PER_SECONDS
}
#else
int
timespec_get(struct timespec *ts, int base)
{
if (!ts)
return 0;
if (base == TIME_UTC) {
clock_gettime(CLOCK_REALTIME, ts);
return base;
}
return 0;
}
#endif
#endif /* !HAVE_TIMESPEC_GET */
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