1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
* Copyright (C) 2002-2004 Igor Sysoev
*/
#ifndef _NGX_EVENT_TIMER_H_INCLUDED_
#define _NGX_EVENT_TIMER_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#define NGX_TIMER_INFINITE -1
#define NGX_TIMER_ERROR -2
/*
* 32 bit timer key value resolution
*
* 1 msec - 24 days
* 10 msec - 8 months
* 50 msec - 3 years 5 months
* 100 msec - 6 years 10 months
*/
#define NGX_TIMER_RESOLUTION 1
ngx_int_t ngx_event_timer_init(ngx_log_t *log);
ngx_msec_t ngx_event_find_timer(void);
void ngx_event_expire_timers(ngx_msec_t timer);
#if (NGX_THREADS)
extern ngx_mutex_t *ngx_event_timer_mutex;
#endif
extern ngx_thread_volatile ngx_rbtree_t *ngx_event_timer_rbtree;
extern ngx_rbtree_t ngx_event_timer_sentinel;
ngx_inline static void ngx_event_del_timer(ngx_event_t *ev)
{
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"event timer del: %d: %d",
ngx_event_ident(ev->data), ev->rbtree_key);
if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
return;
}
ngx_rbtree_delete((ngx_rbtree_t **) &ngx_event_timer_rbtree,
&ngx_event_timer_sentinel,
(ngx_rbtree_t *) &ev->rbtree_key);
ngx_mutex_unlock(ngx_event_timer_mutex);
#if (NGX_DEBUG)
ev->rbtree_left = NULL;
ev->rbtree_right = NULL;
ev->rbtree_parent = NULL;
#endif
ev->timer_set = 0;
}
ngx_inline static void ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
{
ngx_int_t key;
key = (ngx_int_t)
(ngx_elapsed_msec / NGX_TIMER_RESOLUTION * NGX_TIMER_RESOLUTION
+ timer) / NGX_TIMER_RESOLUTION;
#if 0
(ngx_elapsed_msec + timer) / NGX_TIMER_RESOLUTION;
#endif
if (ev->timer_set) {
/*
* Use the previous timer value if a difference between them is less
* then 100 milliseconds. It allows to minimize the rbtree operations
* for the fast connections.
*/
if (abs(key - ev->rbtree_key) < 100 / NGX_TIMER_RESOLUTION) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"event timer: %d, old: %d, new: %d",
ngx_event_ident(ev->data), ev->rbtree_key, key);
return;
}
ngx_del_timer(ev);
}
ev->rbtree_key = key;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"event timer add: %d: %d",
ngx_event_ident(ev->data), ev->rbtree_key);
if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
return;
}
ngx_rbtree_insert((ngx_rbtree_t **) &ngx_event_timer_rbtree,
&ngx_event_timer_sentinel,
(ngx_rbtree_t *) &ev->rbtree_key);
ngx_mutex_unlock(ngx_event_timer_mutex);
ev->timer_set = 1;
}
#endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */
|
