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