131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <tools/TimerBasedTaskExecution.hxx>
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#include <tools/AsynchronousTask.hxx>
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#include <tools/time.hxx>
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#include <sal/log.hxx>
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#include <memory>
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#include <utility>
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namespace sd::tools {
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/** Used by the shared_ptr instead of the private destructor.
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*/
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class TimerBasedTaskExecution::Deleter
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{
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public:
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void operator() (TimerBasedTaskExecution* pObject)
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{
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delete pObject;
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}
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};
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std::shared_ptr<TimerBasedTaskExecution> TimerBasedTaskExecution::Create (
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const std::shared_ptr<AsynchronousTask>& rpTask,
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sal_uInt32 nMillisecondsBetweenSteps,
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sal_uInt32 nMaxTimePerStep)
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{
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std::shared_ptr<TimerBasedTaskExecution> pExecution(
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new TimerBasedTaskExecution(rpTask,nMillisecondsBetweenSteps,nMaxTimePerStep),
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Deleter());
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// Let the new object have a shared_ptr to itself, so that it can
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// release itself when the AsynchronousTask has been executed
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// completely.
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if (pExecution->mpTask != nullptr)
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pExecution->mpSelf = pExecution;
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return pExecution;
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}
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void TimerBasedTaskExecution::Release()
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{
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maTimer.Stop();
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mpSelf.reset();
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}
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//static
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void TimerBasedTaskExecution::ReleaseTask (
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const std::weak_ptr<TimerBasedTaskExecution>& rpExecution)
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{
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if ( rpExecution.expired())
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return;
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try
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{
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std::shared_ptr<tools::TimerBasedTaskExecution> pExecution (rpExecution);
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pExecution->Release();
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}
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catch (const std::bad_weak_ptr&)
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{
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// When a bad_weak_ptr has been thrown then the object pointed
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// to by rpTask has been released right after we checked that it
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// still existed. Too bad, but that means, that we have nothing
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// more do.
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}
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}
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TimerBasedTaskExecution::TimerBasedTaskExecution (
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std::shared_ptr<AsynchronousTask> pTask,
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sal_uInt32 nMillisecondsBetweenSteps,
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sal_uInt32 nMaxTimePerStep)
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: mpTask(std::move(pTask)),
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maTimer("sd TimerBasedTaskExecution maTimer"),
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mnMaxTimePerStep(nMaxTimePerStep)
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{
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maTimer.SetInvokeHandler( LINK(this,TimerBasedTaskExecution,TimerCallback) );
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maTimer.SetTimeout(nMillisecondsBetweenSteps);
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maTimer.Start();
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}
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TimerBasedTaskExecution::~TimerBasedTaskExecution()
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{
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maTimer.Stop();
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}
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IMPL_LINK_NOARG(TimerBasedTaskExecution, TimerCallback, Timer *, void)
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{
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if (mpTask == nullptr)
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return;
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if (mpTask->HasNextStep())
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{
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// Execute as many steps as fit into the time span of length
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// mnMaxTimePerStep. Note that the last step may take longer
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// than allowed.
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sal_uInt32 nStartTime (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime());
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SAL_INFO("sd.tools", __func__ << ": starting TimerBasedTaskExecution at " << nStartTime);
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do
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{
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mpTask->RunNextStep();
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sal_uInt32 nDuration (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime()-nStartTime);
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SAL_INFO("sd.tools", __func__ << ": executed step in " << nDuration);
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if (nDuration > mnMaxTimePerStep)
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break;
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}
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while (mpTask->HasNextStep());
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SAL_INFO("sd.tools", __func__ << ": TimerBasedTaskExecution sleeping");
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maTimer.Start();
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}
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else
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mpSelf.reset();
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}
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} // end of namespace ::sd::tools
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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