Function riot_sys::ble_gap_event_listener_register

pub unsafe extern "C" fn ble_gap_event_listener_register(
    listener: *mut ble_gap_event_listener,
    fn_: ble_gap_event_fn,
    arg: *mut c_void
) -> c_int

Registers listener for GAP events

On success listener structure will be initialized automatically and does not need to be initialized prior to calling this function. To change callback and/or argument unregister listener first and register it again.

@param listener Listener structure @param fn Callback function @param arg Callback argument

@return 0 on success BLE_HS_EINVAL if no callback is specified BLE_HS_EALREADY if listener is already registered