[core] Add li_waitqueue_set_delay() function

include/lighttpd/waitqueue.h

@@ -29,12 +29,15 @@ struct liWaitQueue {
  * li_waitqueue_push, li_waitqueue_pop and li_waitqueue_remove have O(1) complexity
  */
 
-/* initializes a waitqueue by creating and starting the ev_timer. precision is sub-seconds */
+/* initializes a waitqueue by creating the ev_timer and initializing the queue. precision is sub-seconds */
 LI_API void li_waitqueue_init(liWaitQueue *queue, struct ev_loop *loop, liWaitQueueCB callback, gdouble delay, gpointer data);
 
 /* stops the waitqueue. to restart it, simply call li_waitqueue_update */
 LI_API void li_waitqueue_stop(liWaitQueue *queue);
 
+/* updates the delay of the timer. if timer is active, it is stopped and restarted */
+LI_API void li_waitqueue_set_delay(liWaitQueue *queue, gdouble delay);
+
 /* updates the timeout of the waitqueue, you should allways call this at the end of your callback */
 LI_API void li_waitqueue_update(liWaitQueue *queue);
 

src/common/waitqueue.c

@@ -14,6 +14,16 @@ void li_waitqueue_stop(liWaitQueue *queue) {
 	ev_timer_stop(queue->loop, &queue->timer);
 }
 
+void li_waitqueue_set_delay(liWaitQueue *queue, gdouble delay) {
+	if (ev_is_active(&queue->timer)) {
+		ev_timer_stop(queue->loop, &queue->timer);
+		ev_timer_set(&queue->timer, delay, delay);
+		ev_timer_start(queue->loop, &queue->timer);
+	} else {
+		ev_timer_set(&queue->timer, delay, delay);
+	}
+}
+
 void li_waitqueue_update(liWaitQueue *queue) {
 	ev_tstamp repeat;
 	ev_tstamp now = ev_now(queue->loop);