/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef INCLUDED_VCL_TASK_STOPWATCH_HXX #define INCLUDED_VCL_TASK_STOPWATCH_HXX #include #include #include #include /** * Helper class primary used to track time of long running iterating tasks. * * Normally it should be sufficient to instantiate the watch object before * starting the iteration and query continueIter() at the end of each. * * Called Stopwatch, because there is already a Timer class in the Scheduler. * * TODO: merge into the general Scheduler, so this can also be used to track * Task runtimes in a more general way. * TODO: handle fast iterations, where continueIter is called multiple times * per tick, by counting the iterations per tick and use that for approximation. **/ class VCL_DLLPUBLIC TaskStopwatch { static constexpr VclInputFlags eDefaultInputStop = VCL_INPUT_ANY & ~VclInputFlags::TIMER; static constexpr unsigned int nDefaultTimeSlice = 50; static unsigned int m_nTimeSlice; sal_uInt64 m_nStartTicks; sal_uInt64 m_nIterStartTicks; bool m_bConsiderLastIterTime; VclInputFlags m_eInputStop; bool nextIter() { sal_uInt64 nCurTicks = tools::Time::GetSystemTicks(); // handle system ticks wrap as exceeded time slice if (nCurTicks < m_nStartTicks) return false; if (m_bConsiderLastIterTime) { // based on the last iter runtime, we don't expect to finish in time // m_nTimeSlice < (nCurTicks - m_nStartTicks) + (nCurTicks - m_nIterStartTicks) if (m_nTimeSlice < 2 * nCurTicks - m_nIterStartTicks - m_nStartTicks) return false; } // time slice exceeded else if (m_nTimeSlice < nCurTicks - m_nStartTicks) return false; m_nIterStartTicks = nCurTicks; return !Application::AnyInput(m_eInputStop); } public: /** * Per default the watch considers the last iter time when asking for an * other iteration, so considers Scheduler::acceptableTaskTime as a * maximum value. * * If you already know your iter time vary in a large range, consider * setting bConciderLastIterTime to false, so Scheduler::acceptableTaskTime * will be used as a minimum time slot. **/ TaskStopwatch(bool bConciderLastIterTime = true) : m_nStartTicks(tools::Time::GetSystemTicks()) , m_nIterStartTicks(m_nStartTicks) , m_bConsiderLastIterTime(bConciderLastIterTime) , m_eInputStop(eDefaultInputStop) { } /** * Returns true, if another iteration will probably pass in the time slot **/ bool continueIter() { return nextIter(); } /** * Reset the stopwatch **/ void reset() { m_nStartTicks = tools::Time::GetSystemTicks(); m_nIterStartTicks = m_nStartTicks; } /** * Sets the input events, which should also "exceed" the stopwatch. * * Per default this ignores the VclInputFlags::TIMER. */ void setInputStop(VclInputFlags eInputStop = eDefaultInputStop) { m_eInputStop = eInputStop; } VclInputFlags inputStop() const { return m_eInputStop; } /** * Sets the time considered the acceptable maximum for a task to run * * This is an orientation for long time background jobs to yield to * the scheduler, so Idle task don't starve each other too much. **/ static unsigned int timeSlice() { return m_nTimeSlice; } static void setTimeSlice(unsigned int nTimeSlice) { m_nTimeSlice = nTimeSlice; } }; #endif // INCLUDED_VCL_TASK_STOPWATCH_HXX /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ labora/dcm-7.5 LibreOffice 核心代码仓库文档基金会
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AgeCommit message (Expand)Author
2018-05-24EPUB export: fix gla11y warningsMiklos Vajna
2018-05-18Fix some IWYU warningsMiklos Vajna
2018-05-15weld WPFTEncodingDialogCaolán McNamara
2018-05-10writerfilter, writerperfect: various small cleanupsMiklos Vajna
2018-05-01convert a sequence of if to a switchDavid Tardon
2018-05-01tdf#117323 fix import of MS Multiplan for DOSosnola
2018-04-27replace a series of if/else if/ by a switchDavid Tardon
2018-04-26tdf#116822 export ruby text and base text to epub.Mark Hung
2018-04-26upload libwps 0.4.9David Tardon
2018-04-25upload libmwaw 0.3.14David Tardon
2018-04-22rename test filesDavid Tardon
2018-04-22upload libetonyek 0.1.8David Tardon
2018-04-20writerperfect: astyle -> clang-formatMiklos Vajna
2018-04-18weld EPUBExportDialog and add parentCaolán McNamara
2018-04-11writerperfect: fix whitespaceMiklos Vajna
2018-04-10tdf#115623: invoke openPageSpan / closePageSpanMark Hung
2018-04-09use more DBG_UNHANDLED_EXCEPTIONNoel Grandin
2018-04-08tdf#115623: EPUB export: support style:master-pageMark Hung
2018-04-06weld linkeditdialogCaolán McNamara
2018-04-05tdf#115623: EPUB export: handle style:page-layoutMark Hung
2018-03-26use boost::optional in OutDevStateNoel Grandin
2018-03-09inherit welded dialogs from a common ancestorCaolán McNamara
2018-03-09loplugin:redundantfcast look for unnecessary temporariesNoel Grandin
2018-03-05Resolves: tdf#116188 set min version on all .ui files to 3.18Caolán McNamara
2018-03-05weld SfxPasswordDialog DialogCaolán McNamara
2018-02-27astyleDavid Tardon
2018-02-27set number of read bytes correctlyDavid Tardon
2018-02-25convert all help responses to gtk's -11Caolán McNamara