diff options
Diffstat (limited to 'canvas/source/tools/elapsedtime.cxx')
| -rw-r--r-- | canvas/source/tools/elapsedtime.cxx | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/canvas/source/tools/elapsedtime.cxx b/canvas/source/tools/elapsedtime.cxx new file mode 100644 index 000000000000..6ca58a2bf1ee --- /dev/null +++ b/canvas/source/tools/elapsedtime.cxx @@ -0,0 +1,224 @@ +/************************************************************************* + * + * 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 |