Function rcudnn::cudnnRNNBackwardWeights

pub unsafe extern "C" fn cudnnRNNBackwardWeights(
    handle: *mut cudnnContext, 
    rnnDesc: *mut cudnnRNNStruct, 
    seqLength: i32, 
    xDesc: *const *mut cudnnTensorStruct, 
    x: *const c_void, 
    hxDesc: *mut cudnnTensorStruct, 
    hx: *const c_void, 
    yDesc: *const *mut cudnnTensorStruct, 
    y: *const c_void, 
    workSpace: *const c_void, 
    workSpaceSizeInBytes: usize, 
    dwDesc: *mut cudnnFilterStruct, 
    dw: *mut c_void, 
    reserveSpace: *const c_void, 
    reserveSpaceSizeInBytes: usize
) -> cudnnStatus_t