pub unsafe extern "C" fn cudnnFindConvolutionBackwardFilterAlgorithmEx(
handle: *mut cudnnContext,
xDesc: *mut cudnnTensorStruct,
x: *const c_void,
dyDesc: *mut cudnnTensorStruct,
y: *const c_void,
convDesc: *mut cudnnConvolutionStruct,
dwDesc: *mut cudnnFilterStruct,
dw: *mut c_void,
requestedAlgoCount: i32,
returnedAlgoCount: *mut i32,
perfResults: *mut cudnnConvolutionBwdFilterAlgoPerfStruct,
workSpace: *mut c_void,
workSpaceSizeInBytes: usize
) -> cudnnStatus_t