8 static GTimeVal ret_wait;
9 static GSList *timers; /* nearest timer is at the top */
11 #define NEAREST_TIMEOUT (((Timer*)timers->data)->timeout)
13 static void insert_timer(Timer *self)
16 for (it = timers; it != NULL; it = it->next) {
18 if (!timercmp(&self->timeout, &t->timeout, >)) {
19 timers = g_slist_insert_before(timers, it, self);
23 if (it == NULL) /* didnt fit anywhere in the list */
24 timers = g_slist_append(timers, self);
29 g_get_current_time(&now);
36 for (it = timers; it != NULL; it = it->next) {
43 Timer *timer_start(long delay, TimeoutHandler cb, void *data)
45 Timer *self = g_new(Timer, 1);
50 self->last = self->timeout = now;
51 g_time_val_add(&self->timeout, delay);
58 void timer_stop(Timer *self)
63 /* find the time to wait for the nearest timeout */
64 static gboolean nearest_timeout_wait(GTimeVal *tm)
69 tm->tv_sec = NEAREST_TIMEOUT.tv_sec - now.tv_sec;
70 tm->tv_usec = NEAREST_TIMEOUT.tv_usec - now.tv_usec;
72 while (tm->tv_usec < 0) {
73 tm->tv_usec += G_USEC_PER_SEC;
76 tm->tv_sec += tm->tv_usec / G_USEC_PER_SEC;
77 tm->tv_usec %= G_USEC_PER_SEC;
85 void timer_dispatch(GTimeVal **wait)
87 g_get_current_time(&now);
89 while (timers != NULL) {
90 Timer *curr = timers->data; /* get the top element */
91 /* since timer_stop doesn't actually free the timer, we have to do our
95 timers = g_slist_delete_link(timers, timers); /* delete the top */
100 /* the queue is sorted, so if this timer shouldn't fire, none are
102 if (!timercmp(&now, &NEAREST_TIMEOUT, >))
105 /* we set the last fired time to delay msec after the previous firing,
106 then re-insert. timers maintain their order and may trigger more
107 than once if they've waited more than one delay's worth of time.
109 timers = g_slist_delete_link(timers, timers);
110 g_time_val_add(&curr->last, curr->delay);
111 curr->action(curr->data);
112 g_time_val_add(&curr->timeout, curr->delay);
115 /* if at least one timer fires, then don't wait on X events, as there
116 may already be some in the queue from the timer callbacks.
118 ret_wait.tv_sec = ret_wait.tv_usec = 0;
123 if (nearest_timeout_wait(&ret_wait))