+ if (jitter) {
+ static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+ static int last_rand;
+ static time_t timestamp = 0;
+
+ time_t now;
+ int r;
+
+ now = time(NULL);
+
+ pthread_mutex_lock(&mutex);
+ if (now >= timestamp + 10) {
+ timestamp = now;
+ last_rand = rand();
+ }
+
+ r = last_rand;
+
+ pthread_mutex_unlock(&mutex);
+
+ /* We use the same jitter for 10 seconds. That way our
+ * time events elapse in bursts which has the advantage that
+ * packet data can be aggegrated better */
+
+ avahi_timeval_add(tv, (AvahiUsec) (jitter*1000.0*r/(RAND_MAX+1.0)));
+ }