93 строки
3.4 KiB
C
93 строки
3.4 KiB
C
/*---------------------------------------------------------------
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* Copyright (c) 1999,2000,2001,2002,2003
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* The Board of Trustees of the University of Illinois
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* All Rights Reserved.
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*---------------------------------------------------------------
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software (Iperf) and associated
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* documentation files (the "Software"), to deal in the Software
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* without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute,
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* sublicense, and/or sell copies of the Software, and to permit
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* persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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*
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* Redistributions of source code must retain the above
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* copyright notice, this list of conditions and
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* the following disclaimers.
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*
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimers in the documentation and/or other materials
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* provided with the distribution.
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*
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*
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* Neither the names of the University of Illinois, NCSA,
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* nor the names of its contributors may be used to endorse
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* or promote products derived from this Software without
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* specific prior written permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE CONTIBUTORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* ________________________________________________________________
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* National Laboratory for Applied Network Research
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* National Center for Supercomputing Applications
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* University of Illinois at Urbana-Champaign
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* http://www.ncsa.uiuc.edu
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* ________________________________________________________________
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*
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* gettimeofday.c
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* by Mark Gates <mgates@nlanr.net>
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* -------------------------------------------------------------------
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* A (hack) implementation of gettimeofday for Windows.
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* Since I send sec/usec in UDP packets, this made the most sense.
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* ------------------------------------------------------------------- */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef HAVE_GETTIMEOFDAY
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#include "headers.h"
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#include "gettimeofday.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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int gettimeofday( struct timeval* tv, void* timezone ) {
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FILETIME time;
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double timed;
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GetSystemTimeAsFileTime( &time );
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// Apparently Win32 has units of 1e-7 sec (tenths of microsecs)
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// 4294967296 is 2^32, to shift high word over
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// 11644473600 is the number of seconds between
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// the Win32 epoch 1601-Jan-01 and the Unix epoch 1970-Jan-01
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// Tests found floating point to be 10x faster than 64bit int math.
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timed = ((time.dwHighDateTime * 4294967296e-7) - 11644473600.0) +
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(time.dwLowDateTime * 1e-7);
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tv->tv_sec = (long) timed;
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tv->tv_usec = (long) ((timed - tv->tv_sec) * 1e6);
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return 0;
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}
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#ifdef __cplusplus
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} /* end extern "C" */
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#endif
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#endif /* HAVE_GETTIMEOFDAY */
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