Moved queue ping code into queue code

src/queue.c

@@ -85,4 +85,9 @@ void queue_clear(queue *q) {
     }
     pthread_cond_broadcast(q->cond);
     QUEUE_UNLOCK(q);
+}
+void queue_ping(queue *q) {
+    QUEUE_LOCK(q);
+    pthread_cond_broadcast(q->cond);
+    QUEUE_UNLOCK(q);
 }