104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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//#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <osg/Timer>
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#include <osg/Notify>
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using namespace osg;
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// follows are the constructors of the Timer class, once version
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// for each OS combination. The order is WIN32, FreeBSD, Linux, IRIX,
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// and the rest of the world.
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//
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// all the rest of the timer methods are implemented within the header.
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Timer* Timer::instance()
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{
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static Timer s_timer;
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return &s_timer;
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}
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#ifdef WIN32
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#include <sys/types.h>
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#include <fcntl.h>
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#include <windows.h>
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#include <winbase.h>
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Timer::Timer()
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{
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LARGE_INTEGER frequency;
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if(QueryPerformanceFrequency(&frequency))
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{
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_secsPerTick = 1.0/(double)frequency.QuadPart;
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}
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else
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{
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_secsPerTick = 1.0;
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OSG_NOTICE<<"Error: Timer::Timer() unable to use QueryPerformanceFrequency, "<<std::endl;
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OSG_NOTICE<<"timing code will be wrong, Windows error code: "<<GetLastError()<<std::endl;
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}
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setStartTick();
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}
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Timer_t Timer::tick() const
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{
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LARGE_INTEGER qpc;
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if (QueryPerformanceCounter(&qpc))
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{
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return qpc.QuadPart;
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}
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else
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{
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OSG_NOTICE<<"Error: Timer::Timer() unable to use QueryPerformanceCounter, "<<std::endl;
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OSG_NOTICE<<"timing code will be wrong, Windows error code: "<<GetLastError()<<std::endl;
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return 0;
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}
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}
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#else
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#include <unistd.h>
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Timer::Timer( void )
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{
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_secsPerTick = (1.0 / (double) 1000000);
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setStartTick();
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}
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#if defined(_POSIX_TIMERS) && ( _POSIX_TIMERS > 0 ) && defined(_POSIX_MONOTONIC_CLOCK)
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#include <time.h>
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Timer_t Timer::tick() const
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ((osg::Timer_t)ts.tv_sec)*1000000+(osg::Timer_t)ts.tv_nsec/1000;
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}
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#else
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#include <sys/time.h>
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Timer_t Timer::tick() const
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return ((osg::Timer_t)tv.tv_sec)*1000000+(osg::Timer_t)tv.tv_usec;
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}
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#endif
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#endif
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