SequentialThreadSupport.cpp

Go to the documentation of this file.
00001 /*
00002 Bullet Continuous Collision Detection and Physics Library
00003 Copyright (c) 2003-2007 Erwin Coumans  http://bulletphysics.com
00004 
00005 This software is provided 'as-is', without any express or implied warranty.
00006 In no event will the authors be held liable for any damages arising from the use of this software.
00007 Permission is granted to anyone to use this software for any purpose, 
00008 including commercial applications, and to alter it and redistribute it freely, 
00009 subject to the following restrictions:
00010 
00011 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.
00012 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
00013 3. This notice may not be removed or altered from any source distribution.
00014 */
00015 
00016 #include "SequentialThreadSupport.h"
00017 
00018 
00019 #include "SpuCollisionTaskProcess.h"
00020 #include "SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.h"
00021 
00022 SequentialThreadSupport::SequentialThreadSupport(SequentialThreadConstructionInfo& threadConstructionInfo)
00023 {
00024         startThreads(threadConstructionInfo);
00025 }
00026 
00028 SequentialThreadSupport::~SequentialThreadSupport()
00029 {
00030         stopSPU();
00031 }
00032 
00033 #include <stdio.h>
00034 
00036 void SequentialThreadSupport::sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t taskId)
00037 {
00038         switch (uiCommand)
00039         {
00040         case    CMD_GATHER_AND_PROCESS_PAIRLIST:
00041                 {
00042                         btSpuStatus&    spuStatus = m_activeSpuStatus[0];
00043                         spuStatus.m_userPtr=(void*)uiArgument0;
00044                         spuStatus.m_userThreadFunc(spuStatus.m_userPtr,spuStatus.m_lsMemory);
00045                 }
00046         break;
00047         default:
00048                 {
00050                         btAssert(0 && "Not implemented");
00051                 }
00052 
00053         };
00054 
00055 
00056 }
00057 
00059 void SequentialThreadSupport::waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1)
00060 {
00061         btAssert(m_activeSpuStatus.size());
00062         btSpuStatus& spuStatus = m_activeSpuStatus[0];
00063         *puiArgument0 = spuStatus.m_taskId;
00064         *puiArgument1 = spuStatus.m_status;
00065 }
00066 
00067 void SequentialThreadSupport::startThreads(SequentialThreadConstructionInfo& threadConstructionInfo)
00068 {
00069         m_activeSpuStatus.resize(1);
00070         printf("STS: Not starting any threads\n");
00071         btSpuStatus& spuStatus = m_activeSpuStatus[0];
00072         spuStatus.m_userPtr = 0;
00073         spuStatus.m_taskId = 0;
00074         spuStatus.m_commandId = 0;
00075         spuStatus.m_status = 0;
00076         spuStatus.m_lsMemory = threadConstructionInfo.m_lsMemoryFunc();
00077         spuStatus.m_userThreadFunc = threadConstructionInfo.m_userThreadFunc;
00078         printf("STS: Created local store at %p for task %s\n", spuStatus.m_lsMemory, threadConstructionInfo.m_uniqueName);
00079 }
00080 
00081 void SequentialThreadSupport::startSPU()
00082 {
00083 }
00084 
00085 void SequentialThreadSupport::stopSPU()
00086 {
00087         m_activeSpuStatus.clear();
00088 }
00089 
00090 void SequentialThreadSupport::setNumTasks(int numTasks)
00091 {
00092         printf("SequentialThreadSupport::setNumTasks(%d) is not implemented and has no effect\n",numTasks);
00093 }
00094 
00095 
00096 
00097 
00098 class btDummyBarrier : public btBarrier
00099 {
00100 private:
00101                 
00102 public:
00103         btDummyBarrier()
00104         {
00105         }
00106         
00107         virtual ~btDummyBarrier()
00108         {
00109         }
00110         
00111         void sync()
00112         {
00113         }
00114         
00115         virtual void setMaxCount(int n) {}
00116         virtual int  getMaxCount() {return 1;}
00117 };
00118 
00119 class btDummyCriticalSection : public btCriticalSection
00120 {
00121         
00122 public:
00123         btDummyCriticalSection()
00124         {
00125         }
00126         
00127         virtual ~btDummyCriticalSection()
00128         {
00129         }
00130         
00131         unsigned int getSharedParam(int i)
00132         {
00133                 btAssert(i>=0&&i<31);
00134                 return mCommonBuff[i+1];
00135         }
00136         
00137         void setSharedParam(int i,unsigned int p)
00138         {
00139                 btAssert(i>=0&&i<31);
00140                 mCommonBuff[i+1] = p;
00141         }
00142         
00143         void lock()
00144         {
00145                 mCommonBuff[0] = 1;
00146         }
00147         
00148         void unlock()
00149         {
00150                 mCommonBuff[0] = 0;
00151         }
00152 };
00153 
00154 
00155 
00156 
00157 btBarrier*      SequentialThreadSupport::createBarrier()
00158 {
00159         return new btDummyBarrier();
00160 }
00161 
00162 btCriticalSection* SequentialThreadSupport::createCriticalSection()
00163 {
00164         return new btDummyCriticalSection();
00165         
00166 }
00167 
00168 void SequentialThreadSupport::deleteBarrier(btBarrier* barrier)
00169 {
00170     delete barrier;
00171 }
00172 
00173 void SequentialThreadSupport::deleteCriticalSection(btCriticalSection* criticalSection)
00174 {
00175     delete criticalSection;
00176 }
00177 
00178 
00179 
00180 
00181