Win32ThreadSupport.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2007 Erwin Coumans  http://bulletphysics.com

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, 
including commercial applications, and to alter it and redistribute it freely, 
subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/

#include "LinearMath/btScalar.h"
#include "PlatformDefinitions.h"

#ifdef USE_WIN32_THREADING  //platform specific defines are defined in PlatformDefinitions.h

#ifndef BT_WIN32_THREAD_SUPPORT_H
#define BT_WIN32_THREAD_SUPPORT_H

#include "LinearMath/btAlignedObjectArray.h"

#include "btThreadSupportInterface.h"


typedef void (*Win32ThreadFunc)(void* userPtr,void* lsMemory);
typedef void* (*Win32lsMemorySetupFunc)();


class Win32ThreadSupport : public btThreadSupportInterface 
{
public:
        struct  btSpuStatus
        {
                uint32_t        m_taskId;
                uint32_t        m_commandId;
                uint32_t        m_status;

                Win32ThreadFunc m_userThreadFunc;
                void*   m_userPtr; //for taskDesc etc
                void*   m_lsMemory; //initialized using Win32LocalStoreMemorySetupFunc

                void*   m_threadHandle; //this one is calling 'Win32ThreadFunc'

                void*   m_eventStartHandle;
                char    m_eventStartHandleName[32];

                void*   m_eventCompletetHandle;
                char    m_eventCompletetHandleName[32];
                

        };
private:

        btAlignedObjectArray<btSpuStatus>       m_activeSpuStatus;
        btAlignedObjectArray<void*>                     m_completeHandles;
        
        int m_maxNumTasks;
public:

        struct  Win32ThreadConstructionInfo
        {
                Win32ThreadConstructionInfo(const char* uniqueName,
                                                                        Win32ThreadFunc userThreadFunc,
                                                                        Win32lsMemorySetupFunc  lsMemoryFunc,
                                                                        int numThreads=1,
                                                                        int threadStackSize=65535
                                                                        )
                                                                        :m_uniqueName(uniqueName),
                                                                        m_userThreadFunc(userThreadFunc),
                                                                        m_lsMemoryFunc(lsMemoryFunc),
                                                                        m_numThreads(numThreads),
                                                                        m_threadStackSize(threadStackSize)
                {

                }

                const char*                             m_uniqueName;
                Win32ThreadFunc                 m_userThreadFunc;
                Win32lsMemorySetupFunc  m_lsMemoryFunc;
                int                                             m_numThreads;
                int                                             m_threadStackSize;

        };



        Win32ThreadSupport(const Win32ThreadConstructionInfo& threadConstructionInfo);

        virtual ~Win32ThreadSupport();

        void    startThreads(const Win32ThreadConstructionInfo& threadInfo);


        virtual void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1);

        virtual void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);

        virtual bool isTaskCompleted(unsigned int *puiArgument0, unsigned int *puiArgument1, int timeOutInMilliseconds);

        virtual void startSPU();

        virtual void stopSPU();

        virtual void    setNumTasks(int numTasks)
        {
                m_maxNumTasks = numTasks;
        }

        virtual int getNumTasks() const
        {
                return m_maxNumTasks;
        }

        virtual void*   getThreadLocalMemory(int taskId)
        {
                return m_activeSpuStatus[taskId].m_lsMemory;
        }
        virtual btBarrier*      createBarrier();

        virtual btCriticalSection* createCriticalSection();

        virtual void deleteBarrier(btBarrier* barrier);

        virtual void deleteCriticalSection(btCriticalSection* criticalSection);
};

#endif //BT_WIN32_THREAD_SUPPORT_H

#endif //USE_WIN32_THREADING