Function rcudnn::cudnnGetRNNWorkspaceSize

pub unsafe extern "C" fn cudnnGetRNNWorkspaceSize(
    handle: *mut cudnnContext, 
    rnnDesc: *mut cudnnRNNStruct, 
    seqLength: i32, 
    xDesc: *const *mut cudnnTensorStruct, 
    sizeInBytes: *mut usize
) -> cudnnStatus_t