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#include "PxPhysXConfig.h"

#if PX_SUPPORT_GPU_PHYSX

#include "PxGpu.h"

namespace physx
{
	//forward declare stuff from PxPhysXGpuModuleLoader.cpp
	void PxLoadPhysxGPUModule(const char* appGUID);
	typedef physx::PxCudaContextManager* (PxCreateCudaContextManager_FUNC)(physx::PxFoundation& foundation, const physx::PxCudaContextManagerDesc& desc);
	typedef int (PxGetSuggestedCudaDeviceOrdinal_FUNC)(physx::PxErrorCallback& errc);
	extern PxCreateCudaContextManager_FUNC*  g_PxCreateCudaContextManager_Func;
	extern PxGetSuggestedCudaDeviceOrdinal_FUNC* g_PxGetSuggestedCudaDeviceOrdinal_Func;

} // end physx namespace

physx::PxCudaContextManager* PxCreateCudaContextManager(physx::PxFoundation& foundation, const physx::PxCudaContextManagerDesc& desc)
{
	if (!physx::g_PxCreateCudaContextManager_Func)
		physx::PxLoadPhysxGPUModule(desc.appGUID);

	if (physx::g_PxCreateCudaContextManager_Func)
		return physx::g_PxCreateCudaContextManager_Func(foundation, desc);
	else
		return NULL;
}

int PxGetSuggestedCudaDeviceOrdinal(physx::PxErrorCallback& errc)
{
	if (!physx::g_PxGetSuggestedCudaDeviceOrdinal_Func)
		physx::PxLoadPhysxGPUModule(NULL);

	if (physx::g_PxGetSuggestedCudaDeviceOrdinal_Func)
		return physx::g_PxGetSuggestedCudaDeviceOrdinal_Func(errc);
	else
		return -1;
}

#endif // PX_SUPPORT_GPU_PHYSX