+int uloop_signal_add(struct uloop_signal *s)
+{
+ struct list_head *h = &signals;
+ struct uloop_signal *tmp;
+ struct sigaction sa;
+
+ if (s->pending)
+ return -1;
+
+ list_for_each_entry(tmp, &signals, list) {
+ if (tmp->signo > s->signo) {
+ h = &tmp->list;
+ break;
+ }
+ }
+
+ list_add_tail(&s->list, h);
+ s->pending = true;
+
+ sigaction(s->signo, NULL, &s->orig);
+
+ if (s->orig.sa_handler != uloop_signal_wake) {
+ sa.sa_handler = uloop_signal_wake;
+ sa.sa_flags = 0;
+ sigemptyset(&sa.sa_mask);
+ sigaction(s->signo, &sa, NULL);
+ }
+
+ return 0;
+}
+
+int uloop_signal_delete(struct uloop_signal *s)
+{
+ if (!s->pending)
+ return -1;
+
+ list_del(&s->list);
+ s->pending = false;
+
+ if (s->orig.sa_handler != uloop_signal_wake)
+ sigaction(s->signo, &s->orig, NULL);
+
+ return 0;
+}
+
+int uloop_get_next_timeout(void)