85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
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* C11 <time.h> implementation
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*
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* (C) Copyright yohhoy 2012.
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* Copyright 2022 Yonggang Luo
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* Distributed under the Boost Software License, Version 1.0.
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*
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* Permission is hereby granted, free of charge, to any person or organization
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* obtaining a copy of the software and accompanying documentation covered by
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* this license (the "Software") to use, reproduce, display, distribute,
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* execute, and transmit the Software, and to prepare [[derivative work]]s of the
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* Software, and to permit third-parties to whom the Software is furnished to
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* do so, all subject to the following:
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*
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* The copyright notices in the Software and this entire statement, including
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* the above license grant, this restriction and the following disclaimer,
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* must be included in all copies of the Software, in whole or in part, and
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* all derivative works of the Software, unless such copies or derivative
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* works are solely in the form of machine-executable object code generated by
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* a source language processor.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "c11/time.h"
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#ifndef HAVE_TIMESPEC_GET
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#if defined(_WIN32) && !defined(__CYGWIN__)
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN 1
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#endif
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#include <windows.h>
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int
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timespec_get(struct timespec *ts, int base)
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{
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/* difference between 1970 and 1601 */
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#define _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS 116444736000000000ull
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/* 1 tick is 100 nanoseconds */
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#define _TIMESPEC_IMPL_TICKS_PER_SECONDS 10000000ull
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if (!ts)
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return 0;
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if (base == TIME_UTC) {
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FILETIME ft;
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ULARGE_INTEGER date;
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LONGLONG ticks;
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GetSystemTimeAsFileTime(&ft);
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date.HighPart = ft.dwHighDateTime;
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date.LowPart = ft.dwLowDateTime;
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ticks = (LONGLONG)(date.QuadPart - _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS);
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ts->tv_sec = ticks / _TIMESPEC_IMPL_TICKS_PER_SECONDS;
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ts->tv_nsec = (ticks % _TIMESPEC_IMPL_TICKS_PER_SECONDS) * 100;
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return base;
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}
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return 0;
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#undef _TIMESPEC_IMPL_UNIX_EPOCH_IN_TICKS
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#undef _TIMESPEC_IMPL_TICKS_PER_SECONDS
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}
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#else
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int
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timespec_get(struct timespec *ts, int base)
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{
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if (!ts)
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return 0;
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if (base == TIME_UTC) {
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clock_gettime(CLOCK_REALTIME, ts);
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return base;
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}
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return 0;
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}
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#endif
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#endif /* !HAVE_TIMESPEC_GET */
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