Returns in *pi the integer value of the attribute attrib on the kernel given by hfunc. The supported attributes are:

CU_FUNC_ATTRIBUTE_MAX_THREADS_PER_BLOCK: The number of threads beyond which a launch of the function would fail. This number depends on both the function and the device on which the function is currently loaded.
CU_FUNC_ATTRIBUTE_SHARED_SIZE_BYTES: The size in bytes of statically-allocated shared memory required by this function. This does not include dynamically-allocated shared memory requested by the user at runtime.
CU_FUNC_ATTRIBUTE_CONST_SIZE_BYTES: The size in bytes of user-allocated constant memory required by this function.
CU_FUNC_ATTRIBUTE_LOCAL_SIZE_BYTES: The size in bytes of thread local memory used by this function.
CU_FUNC_ATTRIBUTE_NUM_REGS: The number of registers used by each thread of this function.

Parameters:

	pi	- Returned attribute value
	attrib	- Attribute requested
	hfunc	- Function to query attribute of

Returns:: CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_HANDLE, CUDA_ERROR_INVALID_VALUE

Note:: Note that this function may also return error codes from previous, asynchronous launches.

See also:: cuFuncSetBlockShape, cuFuncSetSharedSize, cuParamSetSize, cuParamSeti, cuParamSetf, cuParamSetv, cuParamSetTexRef, cuLaunch, cuLaunchGrid, cuLaunchGridAsync