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64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/*
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* Author: NoMachine <developers@nomachine.com>
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*
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* Copyright (c) 2009, 2010 NoMachine
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* All rights reserved
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*
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* Support functions and system calls' replacements needed to let the
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* software run on Win32 based operating systems.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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#include <windows.h>
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/* Difference in us between UNIX Epoch and Win32 Epoch */
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#define EPOCH_DELTA_US 11644473600000000ULL
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int
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gettimeofday (struct timeval *tv, void *tz)
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{
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union
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{
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FILETIME ft;
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unsigned long long ns;
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} timehelper;
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unsigned long long us;
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/* Fetch time since Jan 1, 1601 in 100ns increments */
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GetSystemTimeAsFileTime(&timehelper.ft);
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/* Convert to microseconds from 100 ns units */
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us = timehelper.ns / 10;
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/* Remove the epoch difference */
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us -= EPOCH_DELTA_US;
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/* Stuff result into the timeval */
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tv->tv_sec = (long) (us / 1000000ULL);
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tv->tv_usec = (long) (us % 1000000ULL);
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return 0;
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}
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