Mercurial > mxe-octave
view src/build-msvctools/compat/gettimeofday.c @ 3061:f8299bb6c872
Initial support for native MSVC compilation.
* add MSVC support files: compiler wrappers and support libraries
* adapt libiconv to work with MSVC
* adapt gettext to work with MSVC
author | Michael Goffioul <michael.goffioul@gmail.com> |
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date | Mon, 17 Jun 2013 22:43:11 -0400 |
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/* * 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> #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; }