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195 f9daq 1
/*
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 * gettimeofday.c
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 *    Win32 gettimeofday() replacement
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 *
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 * src/port/gettimeofday.c
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 *
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 * Copyright (c) 2003 SRA, Inc.
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 * Copyright (c) 2003 SKC, Inc.
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 *
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 * Permission to use, copy, modify, and distribute this software and
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 * its documentation for any purpose, without fee, and without a
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 * written agreement is hereby granted, provided that the above
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 * copyright notice and this paragraph and the following two
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 * paragraphs appear in all copies.
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 *
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
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 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
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 * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
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 * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS
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 * IS" BASIS, AND THE AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
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 * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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 */
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//#include "c.h"
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#include <windows.h>
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#include <time.h>
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/* FILETIME of Jan 1 1970 00:00:00. */
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static const unsigned __int64 epoch = ((unsigned __int64) 116444736000000000ULL);
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/*
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 * timezone information is stored outside the kernel so tzp isn't used anymore.
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 *
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 * Note: this function is not for Win32 high precision timing purpose. See
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 * elapsed_time().
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 */
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int gettimeofday(struct timeval * tp, struct timezone * tzp){
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    FILETIME    file_time;
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    SYSTEMTIME  system_time;
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    ULARGE_INTEGER ularge;
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    GetSystemTime(&system_time);
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    SystemTimeToFileTime(&system_time, &file_time);
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    ularge.LowPart = file_time.dwLowDateTime;
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    ularge.HighPart = file_time.dwHighDateTime;
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    tp->tv_sec = (long) ((ularge.QuadPart - epoch) / 10000000L);
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    tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
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    return 0;
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}