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-rw-r--r--app/nginx/src/core/ngx_rbtree.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/app/nginx/src/core/ngx_rbtree.h b/app/nginx/src/core/ngx_rbtree.h
new file mode 100644
index 0000000..97f0e3e
--- /dev/null
+++ b/app/nginx/src/core/ngx_rbtree.h
@@ -0,0 +1,84 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#ifndef _NGX_RBTREE_H_INCLUDED_
+#define _NGX_RBTREE_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+typedef ngx_uint_t ngx_rbtree_key_t;
+typedef ngx_int_t ngx_rbtree_key_int_t;
+
+
+typedef struct ngx_rbtree_node_s ngx_rbtree_node_t;
+
+struct ngx_rbtree_node_s {
+ ngx_rbtree_key_t key;
+ ngx_rbtree_node_t *left;
+ ngx_rbtree_node_t *right;
+ ngx_rbtree_node_t *parent;
+ u_char color;
+ u_char data;
+};
+
+
+typedef struct ngx_rbtree_s ngx_rbtree_t;
+
+typedef void (*ngx_rbtree_insert_pt) (ngx_rbtree_node_t *root,
+ ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
+
+struct ngx_rbtree_s {
+ ngx_rbtree_node_t *root;
+ ngx_rbtree_node_t *sentinel;
+ ngx_rbtree_insert_pt insert;
+};
+
+
+#define ngx_rbtree_init(tree, s, i) \
+ ngx_rbtree_sentinel_init(s); \
+ (tree)->root = s; \
+ (tree)->sentinel = s; \
+ (tree)->insert = i
+
+
+void ngx_rbtree_insert(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
+void ngx_rbtree_delete(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
+void ngx_rbtree_insert_value(ngx_rbtree_node_t *root, ngx_rbtree_node_t *node,
+ ngx_rbtree_node_t *sentinel);
+void ngx_rbtree_insert_timer_value(ngx_rbtree_node_t *root,
+ ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
+ngx_rbtree_node_t *ngx_rbtree_next(ngx_rbtree_t *tree,
+ ngx_rbtree_node_t *node);
+
+
+#define ngx_rbt_red(node) ((node)->color = 1)
+#define ngx_rbt_black(node) ((node)->color = 0)
+#define ngx_rbt_is_red(node) ((node)->color)
+#define ngx_rbt_is_black(node) (!ngx_rbt_is_red(node))
+#define ngx_rbt_copy_color(n1, n2) (n1->color = n2->color)
+
+
+/* a sentinel must be black */
+
+#define ngx_rbtree_sentinel_init(node) ngx_rbt_black(node)
+
+
+static ngx_inline ngx_rbtree_node_t *
+ngx_rbtree_min(ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
+{
+ while (node->left != sentinel) {
+ node = node->left;
+ }
+
+ return node;
+}
+
+
+#endif /* _NGX_RBTREE_H_INCLUDED_ */