cthreadpool.h

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/***************************************************************************
 *   Copyright (C) 2004 by Ilya A. Volynets-Evenbakh                       *
 *   ilya@total-knowledge.com                                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef CSERVIMPLCTHREADPOOL_H
#define CSERVIMPLCTHREADPOOL_H

#include <sptk3/CThread.h>
#include <sptk3/CWaiter.h>
#include <list>

namespace container {

class CThreadPool
{
public:
    class Thread: public sptk::CThread
    {
        CThreadPool* m_pool;
    protected:
        virtual void threadFunction();
        virtual void onThreadExit();
    public:
        Thread(CThreadPool* p)
            : sptk::CThread("",true)
            , m_pool(p)
        {}
    };
    class Task
    {
    public:
        virtual ~Task(){}
        virtual void run()=0;
    };
private:
    typedef std::list<Thread*> threadlist_t;
    typedef std::list<Task*> tasklist_t;
private:
    threadlist_t m_threads;
    tasklist_t m_queue;
    int m_maxQueueLen;
    int m_curQueueLen;
    bool m_running;
    sptk::CWaiter m_queueLock;
    sptk::CWaiter m_tlLock; 
public:
    CThreadPool(int numThreads,int queueLen);
    ~CThreadPool();
    void queue(Task* t);
    void stop();
protected:
    Task* getTask();
    void threadDone(CThreadPool::Thread* thread);
};

}

#endif