You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

186 lines
3.7 KiB

#include <lighttpd/waitqueue.h>
static void wq_cb(liEventBase *watcher, int events) {
liWaitQueue *queue = LI_CONTAINER_OF(li_event_timer_from(watcher), liWaitQueue, timer);
UNUSED(events);
queue->callback(queue, queue->data);
}
void li_waitqueue_init(liWaitQueue *queue, liEventLoop *loop, const char *waitqueue_name, liWaitQueueCB callback, gdouble delay, gpointer data) {
li_event_timer_init(loop, waitqueue_name, &queue->timer, wq_cb);
queue->head = queue->tail = NULL;
queue->delay = delay;
queue->callback = callback;
queue->data = data;
queue->length = 0;
}
void li_waitqueue_stop(liWaitQueue *queue) {
li_event_clear(&queue->timer);
}
void li_waitqueue_set_delay(liWaitQueue *queue, gdouble delay) {
queue->delay = delay;
if (li_event_active(&queue->timer)) {
li_waitqueue_update(queue);
}
}
void li_waitqueue_update(liWaitQueue *queue) {
li_tstamp repeat;
li_tstamp now = li_event_now(li_event_get_loop(&queue->timer));
if (G_LIKELY(queue->head)) {
repeat = queue->head->ts + queue->delay - now;
if (repeat < 0.05) repeat = 0.05;
li_event_timer_once(&queue->timer, repeat);
} else {
/* stop timer if queue empty */
li_event_stop(&queue->timer);
return;
}
}
void li_waitqueue_push(liWaitQueue *queue, liWaitQueueElem *elem) {
elem->ts = li_event_now(li_event_get_loop(&queue->timer));
if (!elem->queued) {
/* not in the queue yet, insert at the end */
elem->queued = TRUE;
queue->length++;
if (!queue->head) {
/* queue is empty */
queue->head = elem;
queue->tail = elem;
elem->prev = NULL;
elem->next = NULL;
} else {
/* queue not empty */
elem->prev = queue->tail;
elem->next = NULL;
queue->tail->next = elem;
queue->tail = elem;
}
} else {
/* already queued, move to end */
if (elem == queue->tail)
return;
if (elem == queue->head)
queue->head = elem->next;
else
elem->prev->next = elem->next;
elem->next->prev = elem->prev;
elem->prev = queue->tail;
elem->next = NULL;
queue->tail->next = elem;
queue->tail = elem;
}
if (G_UNLIKELY(!li_event_active(&queue->timer)))
li_event_timer_once(&queue->timer, queue->delay);
}
liWaitQueueElem *li_waitqueue_pop(liWaitQueue *queue) {
liWaitQueueElem *elem = queue->head;
li_tstamp now = li_event_now(li_event_get_loop(&queue->timer));
if (!elem || (elem->ts + queue->delay) > now) {
return NULL;
}
if (elem == queue->tail)
queue->tail = NULL;
else
elem->next->prev = NULL;
queue->head = elem->next;
queue->length--;
elem->ts = 0;
elem->queued = FALSE;
return elem;
}
liWaitQueueElem *li_waitqueue_pop_force(liWaitQueue *queue) {
liWaitQueueElem *elem = queue->head;
if (!elem) {
return NULL;
}
if (elem == queue->tail)
queue->tail = NULL;
else
elem->next->prev = NULL;
queue->head = elem->next;
queue->length--;
elem->ts = 0;
elem->queued = FALSE;
return elem;
}
void li_waitqueue_remove(liWaitQueue *queue, liWaitQueueElem *elem) {
if (!elem->queued)
return;
if (elem == queue->head)
queue->head = elem->next;
else
elem->prev->next = elem->next;
if (elem == queue->tail)
queue->tail = elem->prev;
else
elem->next->prev = elem->prev;
elem->ts = 0;
elem->queued = FALSE;
queue->length--;
if (G_UNLIKELY(!queue->head))
li_event_stop(&queue->timer);
}
guint li_waitqueue_pop_ready(liWaitQueue *queue, liWaitQueueElem **head) {
guint i = 0;
liWaitQueueElem *elem = queue->head;
li_tstamp now = li_event_now(li_event_get_loop(&queue->timer));
*head = elem;
while (elem != NULL) {
if ((elem->ts + queue->delay) > now) {
queue->head = elem;
if (elem->prev) {
elem->prev->next = NULL;
}
return i;
}
elem->ts = 0;
elem->queued = FALSE;
elem = elem->next;
queue->length--;
i++;
}
queue->head = NULL;
queue->tail = NULL;
return i;
}