pub unsafe extern fn cudnnGetConvolutionForwardWorkspaceSize(handle: cudnnHandle_t, srcDesc: cudnnTensorDescriptor_t, filterDesc: cudnnFilterDescriptor_t, convDesc: cudnnConvolutionDescriptor_t, destDesc: cudnnTensorDescriptor_t, algo: cudnnConvolutionFwdAlgo_t, sizeInBytes: *mut size_t) -> cudnnStatus_t