pub unsafe extern "C" fn g_io_add_watch(
channel: *mut GIOChannel,
condition: GIOCondition,
func: GIOFunc,
user_data: gpointer,
) -> c_uint
pub unsafe extern "C" fn g_io_add_watch(
channel: *mut GIOChannel,
condition: GIOCondition,
func: GIOFunc,
user_data: gpointer,
) -> c_uint