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/* source:
* cygwin-1.5.24-2-src/cygwin-1.5.24-2/winsup/mingw/mingwex/gettimeofday.c */
/*
* gettimeofday
* Implementation according to:
* The Open Group Base Specifications Issue 6
* IEEE Std 1003.1, 2004 Edition
*/
/*
* THIS SOFTWARE IS NOT COPYRIGHTED
*
* This source code is offered for use in the public domain. You may
* use, modify or distribute it freely.
*
* This code is distributed in the hope that it will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAIMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Contributed by:
* Danny Smith <dannysmith@users.sourceforge.net>
*/
#include <sys/time.h>
#ifdef __MINGW32__
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
# define _W32_FT_OFFSET (116444736000000000ULL)
int __cdecl gettimeofday(struct timeval* __restrict__ tp,
void* __restrict__ tzp __attribute__((unused)))
{
union {
unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
FILETIME ft;
} _now;
if (tp) {
GetSystemTimeAsFileTime(&_now.ft);
tp->tv_usec = (long)((_now.ns100 / 10ULL) % 1000000ULL);
tp->tv_sec = (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
}
/* Always return 0 as per Open Group Base Specifications Issue 6.
Do not set errno on error. */
return 0;
}
#endif // __MINGW32__
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