Add more to itimer

Signed-off-by: Ioannis Konstantelias <ikonstadel@gmail.com>

src/timer_itimer.c

@@ -27,15 +27,14 @@ struct tmr_itimer {
 	struct tmr timer;
 	bool expired;
 	bool running;
-	unsigned total_timers;
-	unsigned interval;	/**< Interval in counts of itimer expirations */
-	unsigned time_left;	/**< Time left in counts of itimer expirations */
-	unsigned time_elapsed;	/**< Time elapsed in counts of itimer expirations */
+	unsigned interval; /**< Interval in counts of itimer expirations */
+	unsigned time_left; /**< Time left in counts of itimer expirations */
+	unsigned time_elapsed; /**< Time elapsed in counts of itimer expirations */
 
 	struct list list;
 };
 
-static struct list *head = NULL;
+static struct list head = {.next = &head, .prev = &head};
 static unsigned elapsed = 0;
 
 static void
@@ -89,10 +88,10 @@ tmr_itimer_destroy(struct tmr *t)
 {
 	struct tmr_itimer *t_i = CONTAINER_OF(t, struct tmr_itimer, timer);
 
-	t_i->total_timers--;
+	list_del(&t_i->list);
 
 	/* The last timer, closes the door */
-	if (--t_i->total_timers == 0) {
+	if (list_is_empty(&head)) {
 		struct sigaction sa = {0};
 		sa.sa_handler = SIG_DFL;
 		sigemptyset(&sa.sa_mask);
@@ -114,10 +113,8 @@ tmr_itimer_create(void)
 		return NULL;
 	}
 
-	static bool first_timer_init = false;
-	if (!first_timer_init) {
+	if (list_is_empty(&head)) {
 		struct sigaction sa;
-		sa.sa_flags = SA_SIGINFO;
 		sa.sa_sigaction = tmr_handler;
 		sigemptyset(&sa.sa_mask);
 		if (sigaction(SIGALRM, &sa, NULL) == -1) {
@@ -135,9 +132,6 @@ tmr_itimer_create(void)
 			goto fail;
 		}
 
-		t_i->total_timers = 0;
-		first_timer_init = true;
-
 		list_create(&head);
 	}
 
@@ -148,7 +142,6 @@ tmr_itimer_create(void)
 	t_i->timer.expired = tmr_itimer_expired;
 	t_i->running = false;
 	t_i->expired = false;
-	t_i->total_timers++;
 
 	list_add(&head, &t_i->list);