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/*************************************************************************
*
* $RCSfile: elapsedtime.cxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: thb $ $Date: 2004-03-18 10:38:37 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _OSL_TIME_H_
#include <osl/time.h>
#endif
#include <canvas/elapsedtime.hxx>
#ifdef WIN
// TEMP!!!
// Awaiting corresponding functionality in OSL
//
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winbase.h>
#include <mmsystem.h>
#endif
namespace canvas
{
namespace tools
{
namespace
{
#ifdef WIN
static double fTimeFactor;
#endif
double getTimeFactor()
{
#ifndef WIN
// value is in nanoseconds
return 1.0/10e9;
#else
// value is hardware-dependent
return fTimeFactor;
#endif
}
sal_uInt64 getCurrentTime()
{
#ifndef WIN
TimeValue aTimeVal;
sal_uInt64 bRet( 0 );
if( osl_getSystemTime( &aTimeVal ) )
{
// combine to seconds + fraction of second
bRet = ((sal_uInt64)aTimeVal.Seconds) * (sal_uInt64)1000000000 + (sal_uInt64)aTimeVal.Nanosec;
}
#else
sal_uInt64 bRet( 0 );
// TEMP!!!
// Awaiting corresponding functionality in OSL
//
// is there a performance counter available?
static bool bTimeSetupDone( false );
static bool bPerfTimerAvailable;
if( !bTimeSetupDone )
{
LONGLONG nPerfCount;
if( QueryPerformanceFrequency((LARGE_INTEGER *) &nPerfCount) )
{
// yes, timer choice flag
bPerfTimerAvailable = true;
// set scaling factor
fTimeFactor = 1.0/nPerfCount;
}
else
{
// no performance counter, read in using timeGetTime
bPerfTimerAvailable = false;
// set timer scaling factor
fTimeFactor = 0.001;
}
bTimeSetupDone = true;
}
if( bPerfTimerAvailable )
{
LONGLONG nCurrTime;
// read initial time
QueryPerformanceCounter((LARGE_INTEGER *) &nCurrTime);
bRet = nCurrTime;
}
else
{
bRet = timeGetTime();
}
#endif
return bRet; // TODO: is 0 okay for the failure case here?
}
}
ElapsedTime::ElapsedTime() :
mnStartTime( getCurrentTime() ),
mfTimeFactor( getTimeFactor() )
{
}
void ElapsedTime::reset()
{
mnStartTime = getCurrentTime();
}
double ElapsedTime::getElapsedTime()
{
sal_uInt64 nCurrTime( getCurrentTime() );
return mfTimeFactor * (nCurrTime - mnStartTime);
}
}
}
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