Create a PhysicsLoopBack that includes both PhysicsClient and PhysicsServer over shared memory.

Add a test for PhysicsLoopBack.

examples/SharedMemory/PhysicsLoopBack.h

@@ -0,0 +1,58 @@
+#ifndef PHYSICS_LOOP_BACK_H
+#define PHYSICS_LOOP_BACK_H
+
+//#include "SharedMemoryCommands.h"
+
+
+#include "PhysicsClient.h"
+#include "LinearMath/btVector3.h"
+
+///todo: the PhysicsClient API was designed with shared memory in mind, 
+///now it become more general we need to move out the shared memory specifics away
+///for example naming [disconnectSharedMemory -> disconnect] [ move setSharedMemoryKey to shared memory specific subclass ]
+
+class PhysicsLoopBack : public PhysicsClient 
+{
+	struct PhysicsLoopBackInternalData* m_data;
+
+public:
+
+	PhysicsLoopBack();
+
+	virtual ~PhysicsLoopBack();
+
+	  // return true if connection succesfull, can also check 'isConnected'
+    virtual bool connect();
+
+	////todo: rename to 'disconnect'
+    virtual void disconnectSharedMemory();
+
+    virtual bool isConnected() const;
+
+    // return non-null if there is a status, nullptr otherwise
+    virtual const  SharedMemoryStatus* processServerStatus();
+
+    virtual  SharedMemoryCommand* getAvailableSharedMemoryCommand();
+
+    virtual bool canSubmitCommand() const;
+
+    virtual bool submitClientCommand(const struct SharedMemoryCommand& command);
+
+    virtual int getNumJoints(int bodyIndex) const;
+
+    virtual void getJointInfo(int bodyIndex, int jointIndex, struct b3JointInfo& info) const;
+
+	///todo: move this out of the
+    virtual void setSharedMemoryKey(int key);
+
+    void uploadBulletFileToSharedMemory(const char* data, int len);
+
+    virtual int getNumDebugLines() const;
+
+    virtual const float* getDebugLinesFrom() const;
+    virtual const float* getDebugLinesTo() const;
+    virtual const float* getDebugLinesColor() const;
+
+};
+
+#endif //PHYSICS_LOOP_BACK_H