ref: 47e3f4c45c1bc7903768608283456a92659f7663
dir: /codec/common/inc/WelsThreadPool.h/
/*!
* \copy
* Copyright (c) 2009-2015, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* \file WelsThreadPool.h
*
* \brief Interfaces introduced in thread pool
*
* \date 5/09/2012 Created
*
*************************************************************************************
*/
#ifndef _WELS_THREAD_POOL_H_
#define _WELS_THREAD_POOL_H_
#include <stdio.h>
#include "WelsTask.h"
#include "WelsTaskThread.h"
#include "WelsCircleQueue.h"
#include "WelsList.h"
namespace WelsCommon {
class IWelsThreadPoolSink {
public:
virtual WELS_THREAD_ERROR_CODE OnTaskExecuted (IWelsTask* pTask) = 0;
virtual WELS_THREAD_ERROR_CODE OnTaskCancelled (IWelsTask* pTask) = 0;
};
class CWelsThreadPool : public CWelsThread, public IWelsTaskThreadSink {
public:
enum {
DEFAULT_THREAD_NUM = 4,
};
CWelsThreadPool (IWelsThreadPoolSink* pSink = NULL, int32_t iMaxThreadNum = DEFAULT_THREAD_NUM);
virtual ~CWelsThreadPool();
//IWelsTaskThreadSink
virtual WELS_THREAD_ERROR_CODE OnTaskStart (CWelsTaskThread* pThread, IWelsTask* pTask);
virtual WELS_THREAD_ERROR_CODE OnTaskStop (CWelsTaskThread* pThread, IWelsTask* pTask);
// CWelsThread
virtual void ExecuteTask();
WELS_THREAD_ERROR_CODE QueueTask (IWelsTask* pTask);
int32_t GetThreadNum() const {
return m_iMaxThreadNum;
}
protected:
WELS_THREAD_ERROR_CODE Init (int32_t iMaxThreadNum = DEFAULT_THREAD_NUM);
WELS_THREAD_ERROR_CODE Uninit();
WELS_THREAD_ERROR_CODE CreateIdleThread();
void DestroyThread (CWelsTaskThread* pThread);
WELS_THREAD_ERROR_CODE AddThreadToIdleQueue (CWelsTaskThread* pThread);
WELS_THREAD_ERROR_CODE AddThreadToBusyList (CWelsTaskThread* pThread);
WELS_THREAD_ERROR_CODE RemoveThreadFromBusyList (CWelsTaskThread* pThread);
void AddTaskToWaitedList (IWelsTask* pTask);
CWelsTaskThread* GetIdleThread();
IWelsTask* GetWaitedTask();
int32_t GetIdleThreadNum();
int32_t GetBusyThreadNum();
int32_t GetWaitedTaskNum();
void ClearWaitedTasks();
private:
int32_t m_iMaxThreadNum;
CWelsCircleQueue<IWelsTask>* m_cWaitedTasks;
CWelsCircleQueue<CWelsTaskThread>* m_cIdleThreads;
CWelsList<CWelsTaskThread>* m_cBusyThreads;
IWelsThreadPoolSink* m_pSink;
CWelsLock m_cLockPool;
CWelsLock m_cLockWaitedTasks;
CWelsLock m_cLockIdleTasks;
CWelsLock m_cLockBusyTasks;
DISALLOW_COPY_AND_ASSIGN (CWelsThreadPool);
};
}
#endif