/**

 * vim: set ts=4 :

 * ================================================================

 * SourceMod

 * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.

 * ================================================================

 *

 * This program is free software; you can redistribute it and/or 

 * modify it under the terms of the GNU General Public License, 

 * version 3.0, as published by the Free Software Foundation.

 * 

 * 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, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to 

 * link the code of this program (as well as its derivative works) to 

 * "Half-Life 2," the "Source Engine," the "SourcePawn JIT," and any 

 * Game MODs that run on software by the Valve Corporation.  You must 

 * obey the GNU General Public License in all respects for all other 

 * code used. Additionally, AlliedModders LLC grants this exception 

 * to all derivative works. AlliedModders LLC defines further 

 * exceptions, found in LICENSE.txt (as of this writing, version 

 * JULY-31-2007), or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_BASEWORKER_H

#define _INCLUDE_SOURCEMOD_BASEWORKER_H

#include "sh_list.h"

#include "ThreadSupport.h"

#define SM_DEFAULT_THREADS_PER_FRAME	1

class BaseWorker;

//SW = Simple Wrapper

class SWThreadHandle : public IThreadHandle

{

	friend class BaseWorker;

public:

	SWThreadHandle(IThreadCreator *parent, const ThreadParams *p, IThread *thread);

	IThread *GetThread();

public:

	//NOTE: We don't support this by default.

	//It's specific usage that'd require many mutexes

	virtual bool WaitForThread();

public:

	virtual void DestroyThis();

	virtual IThreadCreator *Parent();

	virtual void GetParams(ThreadParams *ptparams);

public:

	//Priorities not supported by default.

	virtual ThreadPriority GetPriority();

	virtual bool SetPriority(ThreadPriority prio);

public:

	virtual ThreadState GetState();

	virtual bool Unpause();

private:

	ThreadState m_state;

	ThreadParams m_params;

	IThreadCreator *m_parent;

	IThread *pThread;

};

class BaseWorker : public IThreadWorker

{

public:

	BaseWorker(IThreadWorkerCallbacks *hooks);

	virtual ~BaseWorker();

public:	//IWorker

	virtual unsigned int RunFrame();

	//Controls the worker

	virtual bool Pause();

	virtual bool Unpause();

	virtual bool Start();

	virtual bool Stop(bool flush_cancel);

	//Flushes out any remaining threads

	virtual unsigned int Flush(bool flush_cancel);

	//returns status and number of threads in queue

	virtual WorkerState GetStatus(unsigned int *numThreads);

public:	//IThreadCreator

	virtual void MakeThread(IThread *pThread);

	virtual IThreadHandle *MakeThread(IThread *pThread, ThreadFlags flags);

	virtual IThreadHandle *MakeThread(IThread *pThread, const ThreadParams *params);

	virtual void GetPriorityBounds(ThreadPriority &max, ThreadPriority &min);

public:	//BaseWorker

	virtual void AddThreadToQueue(SWThreadHandle *pHandle);

	virtual SWThreadHandle *PopThreadFromQueue();

	virtual void SetMaxThreadsPerFrame(unsigned int threads);

	virtual unsigned int GetMaxThreadsPerFrame();

protected:

	SourceHook::List<SWThreadHandle *> m_ThreadQueue;

	unsigned int m_perFrame;

	volatile WorkerState m_state;

	IThreadWorkerCallbacks *m_pHooks;

};

#endif //_INCLUDE_SOURCEMOD_BASEWORKER_H