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