Annotation of embedaddon/nginx/src/core/ngx_rbtree.h, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (C) Igor Sysoev
4: * Copyright (C) Nginx, Inc.
5: */
6:
7:
8: #ifndef _NGX_RBTREE_H_INCLUDED_
9: #define _NGX_RBTREE_H_INCLUDED_
10:
11:
12: #include <ngx_config.h>
13: #include <ngx_core.h>
14:
15:
16: typedef ngx_uint_t ngx_rbtree_key_t;
17: typedef ngx_int_t ngx_rbtree_key_int_t;
18:
19:
20: typedef struct ngx_rbtree_node_s ngx_rbtree_node_t;
21:
22: struct ngx_rbtree_node_s {
23: ngx_rbtree_key_t key;
24: ngx_rbtree_node_t *left;
25: ngx_rbtree_node_t *right;
26: ngx_rbtree_node_t *parent;
27: u_char color;
28: u_char data;
29: };
30:
31:
32: typedef struct ngx_rbtree_s ngx_rbtree_t;
33:
34: typedef void (*ngx_rbtree_insert_pt) (ngx_rbtree_node_t *root,
35: ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
36:
37: struct ngx_rbtree_s {
38: ngx_rbtree_node_t *root;
39: ngx_rbtree_node_t *sentinel;
40: ngx_rbtree_insert_pt insert;
41: };
42:
43:
44: #define ngx_rbtree_init(tree, s, i) \
45: ngx_rbtree_sentinel_init(s); \
46: (tree)->root = s; \
47: (tree)->sentinel = s; \
48: (tree)->insert = i
49:
50:
51: void ngx_rbtree_insert(ngx_thread_volatile ngx_rbtree_t *tree,
52: ngx_rbtree_node_t *node);
53: void ngx_rbtree_delete(ngx_thread_volatile ngx_rbtree_t *tree,
54: ngx_rbtree_node_t *node);
55: void ngx_rbtree_insert_value(ngx_rbtree_node_t *root, ngx_rbtree_node_t *node,
56: ngx_rbtree_node_t *sentinel);
57: void ngx_rbtree_insert_timer_value(ngx_rbtree_node_t *root,
58: ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
59:
60:
61: #define ngx_rbt_red(node) ((node)->color = 1)
62: #define ngx_rbt_black(node) ((node)->color = 0)
63: #define ngx_rbt_is_red(node) ((node)->color)
64: #define ngx_rbt_is_black(node) (!ngx_rbt_is_red(node))
65: #define ngx_rbt_copy_color(n1, n2) (n1->color = n2->color)
66:
67:
68: /* a sentinel must be black */
69:
70: #define ngx_rbtree_sentinel_init(node) ngx_rbt_black(node)
71:
72:
73: static ngx_inline ngx_rbtree_node_t *
74: ngx_rbtree_min(ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
75: {
76: while (node->left != sentinel) {
77: node = node->left;
78: }
79:
80: return node;
81: }
82:
83:
84: #endif /* _NGX_RBTREE_H_INCLUDED_ */
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