list_add_tail(l, &t->list);
}
+void timer_init(struct timer *t)
+{
+ list_node_init(&t->list);
+}
+
+static bool list_node_initted(const struct list_node *n)
+{
+ return n->prev == n;
+}
+
void timer_add(struct timers *timers, struct timer *t, struct timeabs when)
{
+ assert(list_node_initted(&t->list));
+
t->time = time_to_grains(when);
/* Added in the past? Treat it as imminent. */
/* FIXME: inline */
void timer_del(struct timers *timers, struct timer *t)
{
- list_del(&t->list);
+ list_del_init(&t->list);
}
static void timers_far_get(struct timers *timers,
timer_add_raw(timers, i);
}
-/* Fills list of expired timers. */
-void timers_expire(struct timers *timers,
- struct timeabs expire,
- struct list_head *list)
+/* Returns an expired timer. */
+struct timer *timers_expire(struct timers *timers, struct timeabs expire)
{
uint64_t now = time_to_grains(expire);
unsigned int off;
+ struct timer *t;
assert(now >= timers->base);
- list_head_init(list);
-
if (!timers->level[0]) {
if (list_empty(&timers->far))
- return;
+ return NULL;
add_level(timers, 0);
}
do {
if (timers->first > now) {
timer_fast_forward(timers, now);
- break;
+ return NULL;
}
timer_fast_forward(timers, timers->first);
off = timers->base % PER_LEVEL;
- list_append_list(list, &timers->level[0]->list[off]);
- if (timers->base == now)
- break;
- } while (update_first(timers));
+ /* This *may* be NULL, if we deleted the first timer */
+ t = list_pop(&timers->level[0]->list[off], struct timer, list);
+ if (t)
+ list_node_init(&t->list);
+ } while (!t && update_first(timers));
+
+ return t;
}
static bool timer_list_check(const struct list_head *l,
/* For other levels, "current" bucket has been emptied, and may contain
* entries for the current + level_size bucket. */
- for (l = 1; timers->level[l] && l < PER_LEVEL; l++) {
+ for (l = 1; l < ARRAY_SIZE(timers->level) && timers->level[l]; l++) {
uint64_t per_bucket = 1ULL << (TIMER_LEVEL_BITS * l);
off = ((timers->base >> (l*TIMER_LEVEL_BITS)) % PER_LEVEL);