125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/**
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* \file timestamp.cxx
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* Provides a class for managing a timestamp (seconds & milliseconds.)
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*/
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// Written by Curtis Olson, started December 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include <simgear/compiler.h>
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#ifdef SG_HAVE_STD_INCLUDES
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# include <ctime>
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#else
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# include <time.h>
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#endif
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#ifdef HAVE_SYS_TIMEB_H
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# include <sys/timeb.h> // for ftime() and struct timeb
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h> // for gettimeofday()
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
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#endif
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// -dw- want to use metrowerks time.h
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#ifdef macintosh
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# include <time.h>
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# include <timer.h>
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#endif
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#ifdef WIN32
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# include <windows.h>
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# if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
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# define NEAR /* */
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# define FAR /* */
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# endif
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# include <mmsystem.h>
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#endif
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#include "timestamp.hxx"
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void SGTimeStamp::stamp() {
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#if defined( WIN32 )
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unsigned int t;
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t = timeGetTime();
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seconds = 0;
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usec = t * 1000;
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#elif defined( HAVE_GETTIMEOFDAY )
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struct timeval current;
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struct timezone tz;
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// sg_timestamp currtime;
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gettimeofday(¤t, &tz);
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seconds = current.tv_sec;
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usec = current.tv_usec;
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#elif defined( HAVE_GETLOCALTIME )
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SYSTEMTIME current;
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GetLocalTime(¤t);
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seconds = current.wSecond;
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usec = current.wMilliseconds * 1000;
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#elif defined( HAVE_FTIME )
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struct timeb current;
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ftime(¤t);
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seconds = current.time;
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usec = current.millitm * 1000;
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// -dw- uses time manager
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#elif defined( macintosh )
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UnsignedWide ms;
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Microseconds(&ms);
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seconds = ms.lo / 1000000;
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usec = ms.lo - ( seconds * 1000000 );
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#else
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# error Port me
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#endif
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}
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// increment the time stamp by the number of microseconds (usec)
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SGTimeStamp operator + (const SGTimeStamp& t, const long& m) {
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#if defined( WIN32 )
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return SGTimeStamp( 0, t.usec + m );
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#else
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return SGTimeStamp( t.seconds + ( t.usec + m ) / 1000000,
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( t.usec + m ) % 1000000 );
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#endif
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}
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// difference between time stamps in microseconds (usec)
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long operator - (const SGTimeStamp& a, const SGTimeStamp& b)
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{
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#if defined( WIN32 )
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return a.usec - b.usec;
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#else
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return 1000000 * (a.seconds - b.seconds) + (a.usec - b.usec);
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#endif
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}
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