add option to compile benchmark using BulletMultiThreaded (for now the option is only tested on Windows)

src/BulletMultiThreaded/btParallelConstraintSolver.h

@@ -0,0 +1,42 @@
+/*
+   Copyright (C) 2010 Sony Computer Entertainment Inc.
+   All rights reserved.
+
+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 __BT_PARALLEL_CONSTRAINT_SOLVER_H
+#define __BT_PARALLEL_CONSTRAINT_SOLVER_H
+
+#include "BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.h"
+									      
+class btParallelConstraintSolver : public btSequentialImpulseConstraintSolver
+{
+protected:
+
+public:
+
+	btParallelConstraintSolver();
+	
+	virtual ~btParallelConstraintSolver();
+
+	//virtual btScalar solveGroup(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifold,int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& info, btIDebugDraw* debugDrawer, btStackAlloc* stackAlloc,btDispatcher* dispatcher);
+	
+	btScalar solveGroupCacheFriendlySetup(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc);
+
+
+
+};
+
+
+
+#endif //__BT_PARALLEL_CONSTRAINT_SOLVER_H