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/*
* copyright (c) 2006 Boudewijn Rempt
*
* This program is free software; you can distribute 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef KIS_THREAD_POOL_
#define KIS_THREAD_POOL_
#include <tqthread.h>
#include <tqptrlist.h>
#include <tqmutex.h>
#include "kis_thread.h"
/**
* A thread pool starts executing threads some time after they are added,
* running a maximum number of threads at one time.
*
* The pool takes ownership of the threads and _deletes_ them once they
* have run. This means that you cannot add getters for important data to
* threads you feed the threadpool. Instead, post the data using a customevent.
*/
class KisThreadPool : public KisThread {
public:
virtual ~KisThreadPool();
static KisThreadPool * instance();
void enqueue(KisThread * thread);
void dequeue(KisThread * thread);
void run();
KisThreadPool();
private:
KisThreadPool(const KisThreadPool&);
KisThreadPool operator=(const KisThreadPool&);
TQMutex m_poolMutex;
int m_numberOfRunningThreads;
int m_numberOfQueuedThreads;
int m_maxThreads;
int m_wait;
TQPtrList<KisThread> m_threads;
TQPtrList<KisThread> m_runningThreads;
TQPtrList<KisThread> m_oldThreads;
static KisThreadPool * m_singleton;
};
#endif
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