add basic CPU multi threading files from Bullet 2.x (still need to make it work)

btgui/MultiThreading/b3SequentialThreadSupport.h

@@ -0,0 +1,100 @@
+/*
+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 "Bullet3Common/b3Scalar.h"
+
+
+
+#ifndef B3_SEQUENTIAL_THREAD_SUPPORT_H
+#define B3_SEQUENTIAL_THREAD_SUPPORT_H
+
+#include "Bullet3Common/b3AlignedObjectArray.h"
+
+#include "b3ThreadSupportInterface.h"
+
+typedef void (*SequentialThreadFunc)(void* userPtr,void* lsMemory);
+typedef void* (*SequentiallsMemorySetupFunc)();
+
+
+
+///The b3SequentialThreadSupport is a portable non-parallel implementation of the btThreadSupportInterface
+///This is useful for debugging and porting SPU Tasks to other platforms.
+class b3SequentialThreadSupport : public b3ThreadSupportInterface 
+{
+public:
+	struct	btSpuStatus
+	{
+		int	m_taskId;
+		int	m_commandId;
+		int	m_status;
+
+		SequentialThreadFunc	m_userThreadFunc;
+
+		void*	m_userPtr; //for taskDesc etc
+		void*	m_lsMemory; //initialized using SequentiallsMemorySetupFunc
+	};
+private:
+	b3AlignedObjectArray<btSpuStatus>	m_activeSpuStatus;
+	b3AlignedObjectArray<void*>			m_completeHandles;	
+public:
+	struct	SequentialThreadConstructionInfo
+	{
+		SequentialThreadConstructionInfo (const char* uniqueName,
+									SequentialThreadFunc userThreadFunc,
+									SequentiallsMemorySetupFunc	lsMemoryFunc
+									)
+									:m_uniqueName(uniqueName),
+									m_userThreadFunc(userThreadFunc),
+									m_lsMemoryFunc(lsMemoryFunc)
+		{
+
+		}
+
+		const char*						m_uniqueName;
+		SequentialThreadFunc		m_userThreadFunc;
+		SequentiallsMemorySetupFunc	m_lsMemoryFunc;
+	};
+
+	b3SequentialThreadSupport(SequentialThreadConstructionInfo& threadConstructionInfo);
+	virtual	~b3SequentialThreadSupport();
+	void	startThreads(SequentialThreadConstructionInfo&	threadInfo);
+///send messages to SPUs
+	virtual	void sendRequest(int uiCommand, void* uiArgument0, int uiArgument1);
+///check for messages from SPUs
+	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);
+///start the spus (can be called at the beginning of each frame, to make sure that the right SPU program is loaded)
+	virtual	void startThreads();
+///tell the task scheduler we are done with the SPU tasks
+	virtual	void stopThreads();
+
+	virtual void setNumTasks(int numTasks);
+
+	virtual int getNumTasks() const
+	{
+		return 1;
+	}
+	virtual b3Barrier*	createBarrier();
+
+	virtual b3CriticalSection* createCriticalSection();
+	
+    virtual void deleteBarrier(b3Barrier* barrier);
+    
+    virtual void deleteCriticalSection(b3CriticalSection* criticalSection);
+
+
+};
+
+#endif //B3_SEQUENTIAL_THREAD_SUPPORT_H
+