|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_event.h>
|
|
|
10
|
|
|
11
|
|
|
12 #if (NGX_THREADS)
|
|
|
13 ngx_mutex_t *ngx_event_timer_mutex;
|
|
|
14 #endif
|
|
|
15
|
|
|
16
|
|
108
|
17 ngx_thread_volatile ngx_rbtree_t ngx_event_timer_rbtree;
|
|
|
18 static ngx_rbtree_node_t ngx_event_timer_sentinel;
|
|
0
|
19
|
|
|
20
|
|
42
|
21 ngx_int_t
|
|
|
22 ngx_event_timer_init(ngx_log_t *log)
|
|
0
|
23 {
|
|
108
|
24 ngx_event_timer_rbtree.root = &ngx_event_timer_sentinel;
|
|
|
25 ngx_event_timer_rbtree.sentinel = &ngx_event_timer_sentinel;
|
|
258
|
26 ngx_event_timer_rbtree.insert = ngx_rbtree_insert_timer_value;
|
|
108
|
27
|
|
0
|
28 #if (NGX_THREADS)
|
|
108
|
29
|
|
|
30 if (ngx_event_timer_mutex) {
|
|
0
|
31 ngx_event_timer_mutex->log = log;
|
|
|
32 return NGX_OK;
|
|
|
33 }
|
|
|
34
|
|
50
|
35 ngx_event_timer_mutex = ngx_mutex_init(log, 0);
|
|
|
36 if (ngx_event_timer_mutex == NULL) {
|
|
0
|
37 return NGX_ERROR;
|
|
|
38 }
|
|
108
|
39
|
|
0
|
40 #endif
|
|
|
41
|
|
|
42 return NGX_OK;
|
|
|
43 }
|
|
|
44
|
|
|
45
|
|
42
|
46 ngx_msec_t
|
|
|
47 ngx_event_find_timer(void)
|
|
0
|
48 {
|
|
110
|
49 ngx_msec_int_t timer;
|
|
|
50 ngx_rbtree_node_t *node, *root, *sentinel;
|
|
0
|
51
|
|
108
|
52 if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) {
|
|
0
|
53 return NGX_TIMER_INFINITE;
|
|
|
54 }
|
|
|
55
|
|
112
|
56 ngx_mutex_lock(ngx_event_timer_mutex);
|
|
0
|
57
|
|
108
|
58 root = ngx_event_timer_rbtree.root;
|
|
|
59 sentinel = ngx_event_timer_rbtree.sentinel;
|
|
|
60
|
|
|
61 node = ngx_rbtree_min(root, sentinel);
|
|
0
|
62
|
|
|
63 ngx_mutex_unlock(ngx_event_timer_mutex);
|
|
|
64
|
|
112
|
65 timer = (ngx_msec_int_t) node->key - (ngx_msec_int_t) ngx_current_msec;
|
|
0
|
66
|
|
108
|
67 return (ngx_msec_t) (timer > 0 ? timer : 0);
|
|
0
|
68 }
|
|
|
69
|
|
|
70
|
|
42
|
71 void
|
|
106
|
72 ngx_event_expire_timers(void)
|
|
0
|
73 {
|
|
108
|
74 ngx_event_t *ev;
|
|
|
75 ngx_rbtree_node_t *node, *root, *sentinel;
|
|
|
76
|
|
|
77 sentinel = ngx_event_timer_rbtree.sentinel;
|
|
0
|
78
|
|
|
79 for ( ;; ) {
|
|
|
80
|
|
112
|
81 ngx_mutex_lock(ngx_event_timer_mutex);
|
|
0
|
82
|
|
108
|
83 root = ngx_event_timer_rbtree.root;
|
|
|
84
|
|
|
85 if (root == sentinel) {
|
|
|
86 return;
|
|
|
87 }
|
|
|
88
|
|
|
89 node = ngx_rbtree_min(root, sentinel);
|
|
0
|
90
|
|
106
|
91 /* node->key <= ngx_current_time */
|
|
|
92
|
|
112
|
93 if ((ngx_msec_int_t) node->key - (ngx_msec_int_t) ngx_current_msec <= 0)
|
|
0
|
94 {
|
|
108
|
95 ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer));
|
|
0
|
96
|
|
|
97 #if (NGX_THREADS)
|
|
|
98
|
|
|
99 if (ngx_threaded && ngx_trylock(ev->lock) == 0) {
|
|
|
100
|
|
|
101 /*
|
|
|
102 * We can not change the timer of the event that is been
|
|
|
103 * handling by another thread. And we can not easy walk
|
|
|
104 * the rbtree to find a next expired timer so we exit the loop.
|
|
|
105 * However it should be rare case when the event that is
|
|
|
106 * been handling has expired timer.
|
|
|
107 */
|
|
|
108
|
|
|
109 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
110 "event %p is busy in expire timers", ev);
|
|
0
|
111 break;
|
|
|
112 }
|
|
|
113 #endif
|
|
|
114
|
|
|
115 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
106
|
116 "event timer del: %d: %M",
|
|
108
|
117 ngx_event_ident(ev->data), ev->timer.key);
|
|
0
|
118
|
|
108
|
119 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
|
|
0
|
120
|
|
|
121 ngx_mutex_unlock(ngx_event_timer_mutex);
|
|
|
122
|
|
|
123 #if (NGX_DEBUG)
|
|
108
|
124 ev->timer.left = NULL;
|
|
|
125 ev->timer.right = NULL;
|
|
|
126 ev->timer.parent = NULL;
|
|
0
|
127 #endif
|
|
|
128
|
|
|
129 ev->timer_set = 0;
|
|
|
130
|
|
|
131 #if (NGX_THREADS)
|
|
|
132 if (ngx_threaded) {
|
|
112
|
133 ev->posted_timedout = 1;
|
|
0
|
134
|
|
112
|
135 ngx_post_event(ev, &ngx_posted_events);
|
|
0
|
136
|
|
|
137 ngx_unlock(ev->lock);
|
|
|
138
|
|
|
139 continue;
|
|
|
140 }
|
|
|
141 #endif
|
|
|
142
|
|
|
143 ev->timedout = 1;
|
|
|
144
|
|
58
|
145 ev->handler(ev);
|
|
0
|
146
|
|
|
147 continue;
|
|
|
148 }
|
|
|
149
|
|
|
150 break;
|
|
|
151 }
|
|
|
152
|
|
|
153 ngx_mutex_unlock(ngx_event_timer_mutex);
|
|
|
154 }
|
