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