pub unsafe extern "C" fn XtAppAddInput(
    _5: XtAppContext,
    _4: c_int,
    _3: *mut c_void,
    _2: Option<unsafe extern "C" fn(_: *mut c_void, _: *mut c_int, _: *mut c_ulong)>,
    _1: *mut c_void
) -> c_ulong