Function rcudnn::cudnnGetReductionWorkspaceSize

pub unsafe extern "C" fn cudnnGetReductionWorkspaceSize(
    handle: *mut cudnnContext, 
    reduceTensorDesc: *mut cudnnReduceTensorStruct, 
    aDesc: *mut cudnnTensorStruct, 
    cDesc: *mut cudnnTensorStruct, 
    sizeInBytes: *mut usize
) -> cudnnStatus_t