* protocol 0 callback
*/
+ case LWS_CALLBACK_LOCK_POLL:
+ /*
+ * lock mutex to protect pollfd state
+ * called before any other POLL related callback
+ */
+ break;
+
+ case LWS_CALLBACK_UNLOCK_POLL:
+ /*
+ * unlock mutex to protect pollfd state when
+ * called after any other POLL related callback
+ */
+ break;
+
case LWS_CALLBACK_ADD_POLL_FD:
if (count_pollfds >= max_poll_elements) {