source: downloads/ogre_src_v1-9-0/OgreMain/include/Threading/OgreDefaultWorkQueueTBB.h

/*-------------------------------------------------------------------------
This source file is a part of OGRE
(Object-oriented Graphics Rendering Engine)

For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2013 Torus Knot Software Ltd
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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THE SOFTWARE
-------------------------------------------------------------------------*/
#ifndef __OgreDefaultWorkQueueTBB_H__
#define __OgreDefaultWorkQueueTBB_H__

#include "../OgreWorkQueue.h"
#include <set>

namespace Ogre
{
        /** Implementation of a general purpose request / response style background work queue.
        @remarks
                This implementation utilises tbb's task system for the WorkQueue implementation.
        */
        class _OgreExport DefaultWorkQueue : public DefaultWorkQueueBase
        {
        public:
                DefaultWorkQueue(const String& name = StringUtil::BLANK);
                virtual ~DefaultWorkQueue();
                /** Process the next request on the queue. 
                @remarks
                        This method is public, but only intended for advanced users to call. 
                        The only reason you would call this, is if you were using your 
                        own thread to drive the worker processing. The thread calling this
                        method will be the thread used to call the RequestHandler.
                */

                /// Main function for each thread spawned.
                virtual void _threadMain();

                /// @copydoc WorkQueue::shutdown
                virtual void shutdown();

                /// @copydoc WorkQueue::startup
                virtual void startup(bool forceRestart = true);

                /// Register the current thread with the rendersystem
                void _registerThreadWithRenderSystem();

        protected:
                virtual void notifyWorkers();

        private:
                tbb::task_scheduler_init mTaskScheduler;
                tbb::task_group mTaskGroup;
                /// Synchronise registering threads with the RenderSystem
                OGRE_MUTEX(mRegisterRSMutex);
                std::set<tbb::tbb_thread::id> mRegisteredThreads;
        };


}

#endif