50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
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/*
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* gettimeofday
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* Implementation according to:
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* The Open Group Base Specifications Issue 6
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* IEEE Std 1003.1, 2004 Edition
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*/
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/*
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* THIS SOFTWARE IS NOT COPYRIGHTED
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*
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* This source code is offered for use in the public domain. You may
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* use, modify or distribute it freely.
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*
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* This code is distributed in the hope that it will be useful but
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* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
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* DISCLAIMED. This includes but is not limited to warranties of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Contributed by:
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* Danny Smith <dannysmith@users.sourceforge.net>
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*/
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#include <sys/time.h>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
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#define _W32_FT_OFFSET (116444736000000000ULL)
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int __cdecl gettimeofday(struct timeval *__restrict__ tp,
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void *__restrict__ tzp __attribute__((unused)))
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{
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union {
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unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
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FILETIME ft;
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} _now;
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if(tp)
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{
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GetSystemTimeAsFileTime (&_now.ft);
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tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
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tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
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}
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/* Always return 0 as per Open Group Base Specifications Issue 6.
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Do not set errno on error. */
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return 0;
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}
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