threadmanager.hxx

Go to the documentation of this file.

/* -*- 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 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 );
 
        void Init();
 
        oslInterlockedCount AddThread(
                            const ::rtl::Reference< ObservableThread >& rThread );
 
        void RemoveThread( const oslInterlockedCount nThreadID,
                           const bool bThreadFinished = false );
 
        DECL_LINK( TryToStartNewThread, Timer*, void );
 
        void SuspendStartingOfThreads()
        {
            std::unique_lock aGuard(maMutex);
 
            mbStartingOfThreadsSuspended = true;
        }
 
        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: */