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/* -*- 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <vcl/timer.hxx>
#include <memory>
namespace sd::tools {
class AsynchronousTask;
/** Execute an AsynchronousTask timer based, i.e. every
nMillisecondsBetweenSteps milliseconds as much steps are executed as fit
into a nMaxTimePerStep millisecond interval.
When a task is executed completely, i.e. HasNextStep() returns <FALSE/>,
the TimerBasedTaskExecution destroys itself. This, of course, works
only if the creating instance does not hold a shared_ptr to that object.
*/
class TimerBasedTaskExecution
{
public:
/** Create a new object of this class.
@param rpTask
The AsynchronousTask that is to be executed.
@param nMillisecondsBetweenSteps
Wait at least this long between the execution of steps. Note
that more than one step may be executed in succession.
@param nMaxTimePerStep
The maximal time for executing steps without yielding control.
*/
static std::shared_ptr<TimerBasedTaskExecution> Create (
const std::shared_ptr<AsynchronousTask>& rpTask,
sal_uInt32 nMillisecondsBetweenSteps,
sal_uInt32 nMaxTimePerStep);
/** Stop the execution of the task and release the shared pointer to
itself so that it will eventually be destroyed.
*/
void Release();
/** Convenience method that calls Release() on the given task. It
checks the given weak_ptr for being expired and catches bad_weak_ptr
exceptions.
*/
static void ReleaseTask (const std::weak_ptr<TimerBasedTaskExecution>& rpTask);
private:
std::shared_ptr<AsynchronousTask> mpTask;
Timer maTimer;
/** This shared_ptr to this is used to destroy a TimerBasedTaskExecution
object when its task has been executed completely.
*/
std::shared_ptr<TimerBasedTaskExecution> mpSelf;
sal_uInt32 mnMaxTimePerStep;
TimerBasedTaskExecution (
const std::shared_ptr<AsynchronousTask>& rpTask,
sal_uInt32 nMillisecondsBetweenSteps,
sal_uInt32 nMaxTimePerStep);
~TimerBasedTaskExecution();
class Deleter;
friend class Deleter;
DECL_LINK(TimerCallback, Timer *, void);
};
} // end of namespace ::sd::tools
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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