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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/idle.hxx>
#include <mutex>
#include <osl/interlck.h>
#include <rtl/ref.hxx>
#include <deque>
#include <cppuhelper/weakref.hxx>
#include <observablethread.hxx>
#include <memory>
namespace com::sun::star::util { class XCancellable; }
namespace com::sun::star::util { class XJobManager; }
class IFinishedThreadListener;
class ThreadListener;
class Timer;
/** class to manage threads
OD 2007-01-29 #i73788#
An instance of this class takes care of the starting of threads.
It assures that not more than <mnStartedSize> threads
are started.
*/
class ThreadManager final
{
public:
explicit ThreadManager( css::uno::Reference< css::util::XJobManager > const & rThreadJoiner );
~ThreadManager();
std::weak_ptr< IFinishedThreadListener > GetThreadListenerWeakRef() const;
void NotifyAboutFinishedThread( const oslInterlockedCount nThreadID );
/** initialization
IMPORTANT NOTE: Needs to be called directly after construction
*/
void Init();
/** add thread to the thread manager and taking ownership for the thread
@return unique ID for added thread
*/
oslInterlockedCount AddThread(
const ::rtl::Reference< ObservableThread >& rThread );
void RemoveThread( const oslInterlockedCount nThreadID,
const bool bThreadFinished = false );
DECL_LINK( TryToStartNewThread, Timer*, void );
/** suspend the starting of threads
Suspending the starting of further threads is sensible during the
destruction of a Writer document.
*/
void SuspendStartingOfThreads()
{
std::unique_lock aGuard(maMutex);
mbStartingOfThreadsSuspended = true;
}
/** continues the starting of threads after it has been suspended
*/
void ResumeStartingOfThreads();
bool StartingOfThreadsSuspended()
{
std::unique_lock aGuard(maMutex);
return mbStartingOfThreadsSuspended;
}
struct tThreadData
{
oslInterlockedCount nThreadID;
::rtl::Reference< ObservableThread > pThread;
css::uno::Reference< css::util::XCancellable > aJob;
tThreadData()
: nThreadID( 0 ),
aJob()
{}
};
private:
static const std::deque< tThreadData >::size_type snStartedSize;
std::mutex maMutex;
css::uno::WeakReference< css::util::XJobManager > mrThreadJoiner;
std::shared_ptr< ThreadListener > mpThreadListener;
oslInterlockedCount mnThreadIDCounter;
std::deque< tThreadData > maWaitingForStartThreads;
std::deque< tThreadData > maStartedThreads;
Idle maStartNewThreadIdle;
bool mbStartingOfThreadsSuspended;
struct ThreadPred
{
oslInterlockedCount mnThreadID;
explicit ThreadPred( oslInterlockedCount nThreadID )
: mnThreadID( nThreadID )
{}
bool operator() ( const tThreadData& rThreadData ) const
{
return rThreadData.nThreadID == mnThreadID;
}
};
bool StartWaitingThread();
bool StartThread( const tThreadData& aThreadData );
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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