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https://github.com/nginx/nginx.git
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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) Nginx, Inc.
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*/
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#ifndef _NGX_RBTREE_H_INCLUDED_
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#define _NGX_RBTREE_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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typedef ngx_uint_t ngx_rbtree_key_t;
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typedef ngx_int_t ngx_rbtree_key_int_t;
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typedef struct ngx_rbtree_node_s ngx_rbtree_node_t;
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struct ngx_rbtree_node_s {
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ngx_rbtree_key_t key;
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ngx_rbtree_node_t *left;
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ngx_rbtree_node_t *right;
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ngx_rbtree_node_t *parent;
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u_char color;
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u_char data;
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};
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typedef struct ngx_rbtree_s ngx_rbtree_t;
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typedef void (*ngx_rbtree_insert_pt) (ngx_rbtree_node_t *root,
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ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
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struct ngx_rbtree_s {
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ngx_rbtree_node_t *root;
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ngx_rbtree_node_t *sentinel;
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ngx_rbtree_insert_pt insert;
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};
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#define ngx_rbtree_init(tree, s, i) \
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ngx_rbtree_sentinel_init(s); \
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(tree)->root = s; \
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(tree)->sentinel = s; \
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(tree)->insert = i
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void ngx_rbtree_insert(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
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void ngx_rbtree_delete(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
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void ngx_rbtree_insert_value(ngx_rbtree_node_t *root, ngx_rbtree_node_t *node,
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ngx_rbtree_node_t *sentinel);
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void ngx_rbtree_insert_timer_value(ngx_rbtree_node_t *root,
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ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
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#define ngx_rbt_red(node) ((node)->color = 1)
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#define ngx_rbt_black(node) ((node)->color = 0)
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#define ngx_rbt_is_red(node) ((node)->color)
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#define ngx_rbt_is_black(node) (!ngx_rbt_is_red(node))
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#define ngx_rbt_copy_color(n1, n2) (n1->color = n2->color)
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/* a sentinel must be black */
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#define ngx_rbtree_sentinel_init(node) ngx_rbt_black(node)
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static ngx_inline ngx_rbtree_node_t *
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ngx_rbtree_min(ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
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{
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while (node->left != sentinel) {
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node = node->left;
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}
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return node;
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}
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#endif /* _NGX_RBTREE_H_INCLUDED_ */
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