pub unsafe extern "C" fn cudnnGetConvolutionBackwardFilterWorkspaceSize(
handle: cudnnHandle_t,
srcDesc: cudnnTensorDescriptor_t,
diffDesc: cudnnTensorDescriptor_t,
convDesc: cudnnConvolutionDescriptor_t,
gradDesc: cudnnFilterDescriptor_t,
algo: cudnnConvolutionBwdFilterAlgo_t,
sizeInBytes: *mut size_t,
) -> cudnnStatus_t