blob: 35052bc294bd4373982c4bf954f15050e909803b [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
ngx_rbtree_t ngx_event_timer_rbtree;
static ngx_rbtree_node_t ngx_event_timer_sentinel;
/*
* the event timer rbtree may contain the duplicate keys, however,
* it should not be a problem, because we use the rbtree to find
* a minimum timer value only
*/
ngx_int_t
ngx_event_timer_init(ngx_log_t *log)
{
ngx_rbtree_init(&ngx_event_timer_rbtree, &ngx_event_timer_sentinel,
ngx_rbtree_insert_timer_value);
return NGX_OK;
}
ngx_msec_t
ngx_event_find_timer(void)
{
ngx_msec_int_t timer;
ngx_rbtree_node_t *node, *root, *sentinel;
if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) {
return NGX_TIMER_INFINITE;
}
root = ngx_event_timer_rbtree.root;
sentinel = ngx_event_timer_rbtree.sentinel;
node = ngx_rbtree_min(root, sentinel);
timer = (ngx_msec_int_t) (node->key - ngx_current_msec);
return (ngx_msec_t) (timer > 0 ? timer : 0);
}
void
ngx_event_expire_timers(void)
{
ngx_event_t *ev;
ngx_rbtree_node_t *node, *root, *sentinel;
sentinel = ngx_event_timer_rbtree.sentinel;
for ( ;; ) {
root = ngx_event_timer_rbtree.root;
if (root == sentinel) {
return;
}
node = ngx_rbtree_min(root, sentinel);
/* node->key > ngx_current_msec */
if ((ngx_msec_int_t) (node->key - ngx_current_msec) > 0) {
return;
}
ev = ngx_rbtree_data(node, ngx_event_t, timer);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"event timer del: %d: %M",
ngx_event_ident(ev->data), ev->timer.key);
ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
#if (NGX_DEBUG)
ev->timer.left = NULL;
ev->timer.right = NULL;
ev->timer.parent = NULL;
#endif
ev->timer_set = 0;
ev->timedout = 1;
ev->handler(ev);
}
}
ngx_int_t
ngx_event_no_timers_left(void)
{
ngx_event_t *ev;
ngx_rbtree_node_t *node, *root, *sentinel;
sentinel = ngx_event_timer_rbtree.sentinel;
root = ngx_event_timer_rbtree.root;
if (root == sentinel) {
return NGX_OK;
}
for (node = ngx_rbtree_min(root, sentinel);
node;
node = ngx_rbtree_next(&ngx_event_timer_rbtree, node))
{
ev = ngx_rbtree_data(node, ngx_event_t, timer);
if (!ev->cancelable) {
return NGX_AGAIN;
}
}
/* only cancelable timers left */
return NGX_OK;
}