source: code/branches/physics/src/bullet/BulletMultiThreaded/SpuSampleTaskProcess.h @ 1966

/*
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.
*/

#ifndef SPU_SAMPLE_TASK_PROCESS_H
#define SPU_SAMPLE_TASK_PROCESS_H

#include <assert.h>


#include "PlatformDefinitions.h"

#include <stdlib.h>

#include "LinearMath/btAlignedObjectArray.h"


#include "SpuSampleTask/SpuSampleTask.h"


//just add your commands here, try to keep them globally unique for debugging purposes
#define CMD_SAMPLE_TASK_COMMAND 10



/// SpuSampleTaskProcess handles SPU processing of collision pairs.
/// When PPU issues a task, it will look for completed task buffers
/// PPU will do postprocessing, dependent on workunit output (not likely)
class SpuSampleTaskProcess
{
        // track task buffers that are being used, and total busy tasks
        btAlignedObjectArray<bool>      m_taskBusy;
        btAlignedObjectArray<SpuSampleTaskDesc>m_spuSampleTaskDesc;
        
        unsigned int   m_numBusyTasks;

        // the current task and the current entry to insert a new work unit
        unsigned int   m_currentTask;

        bool m_initialized;

        void postProcess(int taskId, int outputSize);
        
        class   btThreadSupportInterface*       m_threadInterface;

        unsigned int    m_maxNumOutstandingTasks;



public:
        SpuSampleTaskProcess(btThreadSupportInterface*  threadInterface, unsigned int maxNumOutstandingTasks);
        
        ~SpuSampleTaskProcess();
        
        ///call initialize in the beginning of the frame, before addCollisionPairToTask
        void initialize();

        void issueTask(void* sampleMainMemPtr,int sampleValue,int sampleCommand);

        ///call flush to submit potential outstanding work to SPUs and wait for all involved SPUs to be finished
        void flush();
};


#if defined(USE_LIBSPE2) && defined(__SPU__)
////////////////////MAIN/////////////////////////////
#include "../SpuLibspe2Support.h"
#include <spu_intrinsics.h>
#include <spu_mfcio.h>
#include <SpuFakeDma.h>

void * SamplelsMemoryFunc();
void SampleThreadFunc(void* userPtr,void* lsMemory);

//#define DEBUG_LIBSPE2_MAINLOOP

int main(unsigned long long speid, addr64 argp, addr64 envp)
{
        printf("SPU is up \n");
        
        ATTRIBUTE_ALIGNED128(btSpuStatus status);
        ATTRIBUTE_ALIGNED16( SpuSampleTaskDesc taskDesc ) ;
        unsigned int received_message = Spu_Mailbox_Event_Nothing;
        bool shutdown = false;

        cellDmaGet(&status, argp.ull, sizeof(btSpuStatus), DMA_TAG(3), 0, 0);
        cellDmaWaitTagStatusAll(DMA_MASK(3));

        status.m_status = Spu_Status_Free;
        status.m_lsMemory.p = SamplelsMemoryFunc();

        cellDmaLargePut(&status, argp.ull, sizeof(btSpuStatus), DMA_TAG(3), 0, 0);
        cellDmaWaitTagStatusAll(DMA_MASK(3));
        
        
        while (!shutdown)
        {
                received_message = spu_read_in_mbox();
                

                
                switch(received_message)
                {
                case Spu_Mailbox_Event_Shutdown:
                        shutdown = true;
                        break; 
                case Spu_Mailbox_Event_Task:
                        // refresh the status
#ifdef DEBUG_LIBSPE2_MAINLOOP
                        printf("SPU recieved Task \n");
#endif //DEBUG_LIBSPE2_MAINLOOP
                        cellDmaGet(&status, argp.ull, sizeof(btSpuStatus), DMA_TAG(3), 0, 0);
                        cellDmaWaitTagStatusAll(DMA_MASK(3));
                
                        btAssert(status.m_status==Spu_Status_Occupied);
                        
                        cellDmaGet(&taskDesc, status.m_taskDesc.p, sizeof(SpuSampleTaskDesc), DMA_TAG(3), 0, 0);
                        cellDmaWaitTagStatusAll(DMA_MASK(3));
                        
                        SampleThreadFunc((void*)&taskDesc, reinterpret_cast<void*> (taskDesc.m_mainMemoryPtr) );
                        break;
                case Spu_Mailbox_Event_Nothing:
                default:
                        break;
                }

                // set to status free and wait for next task
                status.m_status = Spu_Status_Free;
                cellDmaLargePut(&status, argp.ull, sizeof(btSpuStatus), DMA_TAG(3), 0, 0);
                cellDmaWaitTagStatusAll(DMA_MASK(3));           
                                
                
        }
        return 0;
}
//////////////////////////////////////////////////////
#endif



#endif // SPU_SAMPLE_TASK_PROCESS_H