3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
8 #ifndef _NGX_RBTREE_H_INCLUDED_
9 #define _NGX_RBTREE_H_INCLUDED_
12 #include <ngx_config.h>
16 typedef ngx_uint_t ngx_rbtree_key_t
;
17 typedef ngx_int_t ngx_rbtree_key_int_t
;
20 typedef struct ngx_rbtree_node_s ngx_rbtree_node_t
;
22 struct ngx_rbtree_node_s
{
24 ngx_rbtree_node_t
*left
;
25 ngx_rbtree_node_t
*right
;
26 ngx_rbtree_node_t
*parent
;
32 typedef struct ngx_rbtree_s ngx_rbtree_t
;
34 typedef void (*ngx_rbtree_insert_pt
) (ngx_rbtree_node_t
*root
,
35 ngx_rbtree_node_t
*node
, ngx_rbtree_node_t
*sentinel
);
38 ngx_rbtree_node_t
*root
;
39 ngx_rbtree_node_t
*sentinel
;
40 ngx_rbtree_insert_pt insert
;
44 #define ngx_rbtree_init(tree, s, i) \
45 ngx_rbtree_sentinel_init(s); \
47 (tree)->sentinel = s; \
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
);
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)
68 /* a sentinel must be black */
70 #define ngx_rbtree_sentinel_init(node) ngx_rbt_black(node)
73 static ngx_inline ngx_rbtree_node_t
*
74 ngx_rbtree_min(ngx_rbtree_node_t
*node
, ngx_rbtree_node_t
*sentinel
)
76 while (node
->left
!= sentinel
) {
84 #endif /* _NGX_RBTREE_H_INCLUDED_ */