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
121
122
123
124
125
126
127
128
129
|
/*
* Copyright (C) Igor Sysoev
*/
#ifndef NGX_QUEUE_H_INCLUDED_
#define NGX_QUEUE_H_INCLUDED_
typedef struct ngx_queue_s ngx_queue_t;
struct ngx_queue_s {
ngx_queue_t *prev;
ngx_queue_t *next;
};
#define ngx_queue_init(q) \
do { \
(q)->prev = q; \
(q)->next = q; \
} \
while (0)
#define ngx_queue_empty(h) \
(h == (h)->prev)
#define ngx_queue_insert_head(h, x) \
do { \
(x)->next = (h)->next; \
(x)->next->prev = x; \
(x)->prev = h; \
(h)->next = x; \
} \
while (0)
#define ngx_queue_insert_after ngx_queue_insert_head
#define ngx_queue_insert_tail(h, x) \
do { \
(x)->prev = (h)->prev; \
(x)->prev->next = x; \
(x)->next = h; \
(h)->prev = x; \
} \
while (0)
#define ngx_queue_head(h) \
(h)->next
#define ngx_queue_last(h) \
(h)->prev
#define ngx_queue_sentinel(h) \
(h)
#define ngx_queue_next(q) \
(q)->next
#define ngx_queue_prev(q) \
(q)->prev
#if defined(NGX_DEBUG)
#define ngx_queue_remove(x) \
do { \
(x)->next->prev = (x)->prev; \
(x)->prev->next = (x)->next; \
(x)->prev = NULL; \
(x)->next = NULL; \
} \
while (0)
#else
#define ngx_queue_remove(x) \
do { \
(x)->next->prev = (x)->prev; \
(x)->prev->next = (x)->next; \
} \
while (0)
#endif
#define ngx_queue_split(h, q, n) \
do { \
(n)->prev = (h)->prev; \
(n)->prev->next = n; \
(n)->next = q; \
(h)->prev = (q)->prev; \
(h)->prev->next = h; \
(q)->prev = n; \
} \
while (0)
#define ngx_queue_add(h, n) \
do { \
(h)->prev->next = (n)->next; \
(n)->next->prev = (h)->prev; \
(h)->prev = (n)->prev; \
(h)->prev->next = h; \
} \
while (0)
#define ngx_queue_data(q, type, link) \
((type *) ((unsigned char *) q - offsetof(type, link)))
#define ngx_queue_foreach(q, h) \
for ((q) = ngx_queue_head(h); \
(q) != ngx_queue_sentinel(h) && !ngx_queue_empty(h); \
(q) = ngx_queue_next(q))
#endif /* NGX_QUEUE_H_INCLUDED_ */
|
