/* * gettimeofday.c * Win32 gettimeofday() replacement * * $PostgreSQL: pgsql/src/port/gettimeofday.c,v 1.9 2006/03/04 04:44:07 momjian Exp $ * * Copyright (c) 2003 SRA, Inc. * Copyright (c) 2003 SKC, Inc. * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose, without fee, and without a * written agreement is hereby granted, provided that the above * copyright notice and this paragraph and the following two * paragraphs appear in all copies. * * IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS * IS" BASIS, AND THE AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. */ #ifdef __MSW32__ #include // timeval is defined in here. #endif /* FILETIME of Jan 1 1970 00:00:00. */ static const unsigned __int64 epoch = 11644473600000000Ui64; struct timezone { int tz_minuteswest; /* minutes W of Greenwich */ int tz_dsttime; /* type of dst correction */ }; /* * timezone information is stored outside the kernel so tzp isn't used anymore. * * Note: this function is not for Win32 high precision timing purpose. See * elapsed_time(). */ int gettimeofday(struct timeval * tp, struct timezone * tzp) { FILETIME file_time; SYSTEMTIME system_time; ULARGE_INTEGER ularge; GetSystemTime(&system_time); SystemTimeToFileTime(&system_time, &file_time); ularge.LowPart = file_time.dwLowDateTime; ularge.HighPart = file_time.dwHighDateTime; tp->tv_sec = (long)((ularge.QuadPart - epoch) / 10000000L); tp->tv_usec = (long)(system_time.wMilliseconds * 1000); return 0; }