Type Alias register_cb 

pub type register_cb = Option<unsafe extern "C" fn(action: register_action_e, message: *const c_char, client_data: gpointer)>;

Aliased Type

pub enum register_cb {
    None,
    Some(unsafe extern "C" fn(u32, *const i8, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(u32, *const i8, *mut c_void))

Some value of type T.