89 lines
3.1 KiB
C++
89 lines
3.1 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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#pragma once
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#include <vcl/timer.hxx>
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#include <memory>
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namespace sd::tools {
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class AsynchronousTask;
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/** Execute an AsynchronousTask timer based, i.e. every
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nMillisecondsBetweenSteps milliseconds as much steps are executed as fit
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into a nMaxTimePerStep millisecond interval.
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When a task is executed completely, i.e. HasNextStep() returns <FALSE/>,
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the TimerBasedTaskExecution destroys itself. This, of course, works
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only if the creating instance does not hold a shared_ptr to that object.
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*/
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class TimerBasedTaskExecution
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{
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public:
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/** Create a new object of this class.
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@param rpTask
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The AsynchronousTask that is to be executed.
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@param nMillisecondsBetweenSteps
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Wait at least this long between the execution of steps. Note
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that more than one step may be executed in succession.
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@param nMaxTimePerStep
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The maximal time for executing steps without yielding control.
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*/
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static std::shared_ptr<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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/** Stop the execution of the task and release the shared pointer to
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itself so that it will eventually be destroyed.
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*/
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void Release();
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/** Convenience method that calls Release() on the given task. It
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checks the given weak_ptr for being expired and catches bad_weak_ptr
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exceptions.
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*/
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static void ReleaseTask (const std::weak_ptr<TimerBasedTaskExecution>& rpTask);
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private:
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std::shared_ptr<AsynchronousTask> mpTask;
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Timer maTimer;
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/** This shared_ptr to this is used to destroy a TimerBasedTaskExecution
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object when its task has been executed completely.
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*/
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std::shared_ptr<TimerBasedTaskExecution> mpSelf;
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sal_uInt32 mnMaxTimePerStep;
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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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~TimerBasedTaskExecution();
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class Deleter;
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friend class Deleter;
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DECL_LINK(TimerCallback, Timer *, void);
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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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