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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"
#include "osl/time.h"
#include "osl/diagnose.h"
#include "canvas/elapsedtime.hxx"
#if defined(WIN) || defined(WNT)
#if defined _MSC_VER
#pragma warning(push,1)
#endif
// TEMP!!!
// Awaiting corresponding functionality in OSL
//
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winbase.h>
#include <mmsystem.h>
#endif
#if defined _MSC_VER
#pragma warning(pop)
#endif
#include <algorithm>
#include <limits>
namespace canvas {
namespace tools {
#if defined(WIN) || defined(WNT)
// TODO(Q2): is 0 okay for the failure case here?
double ElapsedTime::getSystemTime()
{
// TEMP!!!
// Awaiting corresponding functionality in OSL
//
// is there a performance counter available?
static bool bTimeSetupDone( false );
static bool bPerfTimerAvailable( false );
static LONGLONG nPerfCountFreq;
// TODO(F1): This _might_ cause problems, as it prevents correct
// time handling for very long lifetimes of this class's
// surrounding component in memory. When the difference between
// current sys time and nInitialCount exceeds IEEE double's
// mantissa, time will start to run jerky.
static LONGLONG nInitialCount;
if( !bTimeSetupDone )
{
if( QueryPerformanceFrequency(
reinterpret_cast<LARGE_INTEGER *>(&nPerfCountFreq) ) )
{
// read initial time:
QueryPerformanceCounter(
reinterpret_cast<LARGE_INTEGER *>(&nInitialCount) );
bPerfTimerAvailable = true;
}
bTimeSetupDone = true;
}
if( bPerfTimerAvailable )
{
LONGLONG nCurrCount;
QueryPerformanceCounter(
reinterpret_cast<LARGE_INTEGER *>(&nCurrCount) );
nCurrCount -= nInitialCount;
return double(nCurrCount) / nPerfCountFreq;
}
else
{
LONGLONG nCurrTime = timeGetTime();
return double(nCurrTime) / 1000.0;
}
}
#else // ! WNT
// TODO(Q2): is 0 okay for the failure case here?
double ElapsedTime::getSystemTime()
{
TimeValue aTimeVal;
if( osl_getSystemTime( &aTimeVal ) )
return ((aTimeVal.Nanosec * 10e-10) + aTimeVal.Seconds);
else
return 0.0;
}
#endif
ElapsedTime::ElapsedTime()
: m_pTimeBase(),
m_fLastQueriedTime( 0.0 ),
m_fStartTime( getSystemTime() ),
m_fFrozenTime( 0.0 ),
m_bInPauseMode( false ),
m_bInHoldMode( false )
{
}
ElapsedTime::ElapsedTime(
boost::shared_ptr<ElapsedTime> const & pTimeBase )
: m_pTimeBase( pTimeBase ),
m_fLastQueriedTime( 0.0 ),
m_fStartTime( getCurrentTime() ),
m_fFrozenTime( 0.0 ),
m_bInPauseMode( false ),
m_bInHoldMode( false )
{
}
boost::shared_ptr<ElapsedTime> const & ElapsedTime::getTimeBase() const
{
return m_pTimeBase;
}
void ElapsedTime::reset()
{
m_fLastQueriedTime = 0.0;
m_fStartTime = getCurrentTime();
m_fFrozenTime = 0.0;
m_bInPauseMode = false;
m_bInHoldMode = false;
}
void ElapsedTime::adjustTimer( double fOffset, bool /*bLimitToLastQueriedTime*/ )
{
// to make getElapsedTime() become _larger_, have to reduce
// m_fStartTime.
m_fStartTime -= fOffset;
// also adjust frozen time, this method must _always_ affect the
// value returned by getElapsedTime()!
if (m_bInHoldMode || m_bInPauseMode)
m_fFrozenTime += fOffset;
}
double ElapsedTime::getCurrentTime() const
{
return m_pTimeBase.get() == 0
? getSystemTime() : m_pTimeBase->getElapsedTimeImpl();
}
double ElapsedTime::getElapsedTime() const
{
m_fLastQueriedTime = getElapsedTimeImpl();
return m_fLastQueriedTime;
}
double ElapsedTime::getElapsedTimeImpl() const
{
if (m_bInHoldMode || m_bInPauseMode)
return m_fFrozenTime;
return getCurrentTime() - m_fStartTime;
}
void ElapsedTime::pauseTimer()
{
m_fFrozenTime = getElapsedTimeImpl();
m_bInPauseMode = true;
}
void ElapsedTime::continueTimer()
{
m_bInPauseMode = false;
// stop pausing, time runs again. Note that
// getElapsedTimeImpl() honors hold mode, i.e. a
// continueTimer() in hold mode will preserve the latter
const double fPauseDuration( getElapsedTimeImpl() - m_fFrozenTime );
// adjust start time, such that subsequent getElapsedTime() calls
// will virtually start from m_fFrozenTime.
m_fStartTime += fPauseDuration;
}
void ElapsedTime::holdTimer()
{
// when called during hold mode (e.g. more than once per time
// object), the original hold time will be maintained.
m_fFrozenTime = getElapsedTimeImpl();
m_bInHoldMode = true;
}
void ElapsedTime::releaseTimer()
{
m_bInHoldMode = false;
}
} // namespace tools
} // namespace canvas
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