Mercurial > hg > nginx-quic
annotate src/core/ngx_rbtree.c @ 903:89428c0b5a1c
release-0.5.2 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 11 Dec 2006 15:23:28 +0000 |
parents | 4924b71d77f6 |
children | 68cc5e2e1a5d |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
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11 /* |
559 | 12 * The red-black tree code is based on the algorithm described in |
13 * the "Introduction to Algorithms" by Cormen, Leiserson and Rivest. | |
205
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14 */ |
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15 |
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16 #define ngx_rbt_red(node) ((node)->color = 1) |
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17 #define ngx_rbt_black(node) ((node)->color = 0) |
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18 #define ngx_rbt_is_red(node) ((node)->color) |
205
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19 #define ngx_rbt_is_black(node) (!ngx_rbt_is_red(node)) |
206
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20 #define ngx_rbt_copy_color(n1, n2) (n1->color = n2->color) |
205
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21 |
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22 |
559 | 23 static ngx_inline void ngx_rbtree_left_rotate(ngx_rbtree_node_t **root, |
24 ngx_rbtree_node_t *sentinel, ngx_rbtree_node_t *node); | |
25 static ngx_inline void ngx_rbtree_right_rotate(ngx_rbtree_node_t **root, | |
26 ngx_rbtree_node_t *sentinel, ngx_rbtree_node_t *node); | |
205
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27 |
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28 |
493 | 29 void |
559 | 30 ngx_rbtree_insert(ngx_thread_volatile ngx_rbtree_t *tree, |
31 ngx_rbtree_node_t *node) | |
205
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32 { |
559 | 33 ngx_rbtree_node_t **root, *temp, *sentinel; |
205
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34 |
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35 /* a binary tree insert */ |
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36 |
559 | 37 root = (ngx_rbtree_node_t **) &tree->root; |
38 sentinel = tree->sentinel; | |
39 | |
207
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40 if (*root == sentinel) { |
212
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41 node->parent = NULL; |
207
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42 node->left = sentinel; |
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43 node->right = sentinel; |
205
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44 ngx_rbt_black(node); |
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45 *root = node; |
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46 |
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47 return; |
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48 } |
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49 |
853 | 50 tree->insert(*root, node, sentinel); |
205
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51 |
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52 /* re-balance tree */ |
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53 |
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54 while (node != *root && ngx_rbt_is_red(node->parent)) { |
205
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55 |
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56 if (node->parent == node->parent->parent->left) { |
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57 temp = node->parent->parent->right; |
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58 |
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59 if (ngx_rbt_is_red(temp)) { |
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60 ngx_rbt_black(node->parent); |
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61 ngx_rbt_black(temp); |
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62 ngx_rbt_red(node->parent->parent); |
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63 node = node->parent->parent; |
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64 |
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65 } else { |
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66 if (node == node->parent->right) { |
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67 node = node->parent; |
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68 ngx_rbtree_left_rotate(root, sentinel, node); |
205
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69 } |
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70 |
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71 ngx_rbt_black(node->parent); |
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72 ngx_rbt_red(node->parent->parent); |
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73 ngx_rbtree_right_rotate(root, sentinel, node->parent->parent); |
205
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74 } |
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75 |
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76 } else { |
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77 temp = node->parent->parent->left; |
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78 |
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79 if (ngx_rbt_is_red(temp)) { |
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80 ngx_rbt_black(node->parent); |
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81 ngx_rbt_black(temp); |
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82 ngx_rbt_red(node->parent->parent); |
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83 node = node->parent->parent; |
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84 |
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85 } else { |
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86 if (node == node->parent->left) { |
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87 node = node->parent; |
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88 ngx_rbtree_right_rotate(root, sentinel, node); |
205
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89 } |
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90 |
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91 ngx_rbt_black(node->parent); |
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92 ngx_rbt_red(node->parent->parent); |
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93 ngx_rbtree_left_rotate(root, sentinel, node->parent->parent); |
205
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94 } |
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95 } |
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96 } |
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97 |
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98 ngx_rbt_black(*root); |
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99 } |
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100 |
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101 |
493 | 102 void |
861 | 103 ngx_rbtree_insert_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, |
104 ngx_rbtree_node_t *sentinel) | |
105 { | |
106 for ( ;; ) { | |
107 | |
108 if (node->key < temp->key) { | |
109 | |
110 if (temp->left == sentinel) { | |
111 temp->left = node; | |
112 break; | |
113 } | |
114 | |
115 temp = temp->left; | |
116 | |
117 } else { | |
118 | |
119 if (temp->right == sentinel) { | |
120 temp->right = node; | |
121 break; | |
122 } | |
123 | |
124 temp = temp->right; | |
125 } | |
126 } | |
127 | |
128 node->parent = temp; | |
129 node->left = sentinel; | |
130 node->right = sentinel; | |
131 ngx_rbt_red(node); | |
132 } | |
133 | |
134 | |
135 void | |
853 | 136 ngx_rbtree_insert_timer_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, |
137 ngx_rbtree_node_t *sentinel) | |
138 { | |
139 for ( ;; ) { | |
140 | |
141 /* | |
142 * Timer values | |
143 * 1) are spread in small range, usually several minutes, | |
144 * 2) and overflow each 49 days, if milliseconds are stored in 32 bits. | |
145 * The comparison takes into account that overflow. | |
146 */ | |
147 | |
148 if ((ngx_rbtree_key_int_t) node->key - (ngx_rbtree_key_int_t) temp->key | |
149 < 0) | |
150 { | |
151 /* node->key < temp->key */ | |
152 | |
153 if (temp->left == sentinel) { | |
154 temp->left = node; | |
155 break; | |
156 } | |
157 | |
158 temp = temp->left; | |
159 | |
160 } else { | |
161 | |
162 if (temp->right == sentinel) { | |
163 temp->right = node; | |
164 break; | |
165 } | |
166 | |
167 temp = temp->right; | |
168 } | |
169 } | |
170 | |
171 node->parent = temp; | |
172 node->left = sentinel; | |
173 node->right = sentinel; | |
174 ngx_rbt_red(node); | |
175 } | |
176 | |
177 | |
178 void | |
559 | 179 ngx_rbtree_delete(ngx_thread_volatile ngx_rbtree_t *tree, |
180 ngx_rbtree_node_t *node) | |
205
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181 { |
853 | 182 ngx_uint_t red; |
559 | 183 ngx_rbtree_node_t **root, *sentinel, *subst, *temp, *w; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
184 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 /* a binary tree delete */ |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
186 |
559 | 187 root = (ngx_rbtree_node_t **) &tree->root; |
188 sentinel = tree->sentinel; | |
189 | |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
190 if (node->left == sentinel) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
191 temp = node->right; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
192 subst = node; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
193 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
194 } else if (node->right == sentinel) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
195 temp = node->left; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 subst = node; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
197 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 } else { |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
199 subst = ngx_rbtree_min(node->right, sentinel); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
201 if (subst->left != sentinel) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
202 temp = subst->left; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 } else { |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
204 temp = subst->right; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
205 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
206 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
207 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
208 if (subst == *root) { |
229
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
209 *root = temp; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
210 ngx_rbt_black(temp); |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
211 |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
212 /* DEBUG stuff */ |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
213 node->left = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
214 node->right = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
215 node->parent = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
216 node->key = 0; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
217 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
218 return; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
219 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
220 |
852 | 221 red = ngx_rbt_is_red(subst); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
222 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
223 if (subst == subst->parent->left) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
224 subst->parent->left = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
225 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
226 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
227 subst->parent->right = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
228 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
229 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
230 if (subst == node) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
231 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
232 temp->parent = subst->parent; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
233 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
234 } else { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
235 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
236 if (subst->parent == node) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
237 temp->parent = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
238 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
239 } else { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
240 temp->parent = subst->parent; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
241 } |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
242 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
243 subst->left = node->left; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
244 subst->right = node->right; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
245 subst->parent = node->parent; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
246 ngx_rbt_copy_color(subst, node); |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
247 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
248 if (node == *root) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
249 *root = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
250 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
251 } else { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
252 if (node == node->parent->left) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
253 node->parent->left = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
254 } else { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
255 node->parent->right = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
256 } |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
257 } |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
258 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
259 if (subst->left != sentinel) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
260 subst->left->parent = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
261 } |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
262 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
263 if (subst->right != sentinel) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
264 subst->right->parent = subst; |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
265 } |
229
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
266 |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
267 /* DEBUG stuff */ |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
268 node->left = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
269 node->right = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
270 node->parent = NULL; |
ce6b72fe33fe
nginx-0.0.1-2004-01-15-20:51:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
changeset
|
271 node->key = 0; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
272 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
273 |
852 | 274 if (red) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
275 return; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
276 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
277 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
278 /* a delete fixup */ |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
279 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
280 while (temp != *root && ngx_rbt_is_black(temp)) { |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
281 |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
282 if (temp == temp->parent->left) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
283 w = temp->parent->right; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
284 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
285 if (ngx_rbt_is_red(w)) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
286 ngx_rbt_black(w); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
287 ngx_rbt_red(temp->parent); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
288 ngx_rbtree_left_rotate(root, sentinel, temp->parent); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
289 w = temp->parent->right; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
290 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
291 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
292 if (ngx_rbt_is_black(w->left) && ngx_rbt_is_black(w->right)) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
293 ngx_rbt_red(w); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
294 temp = temp->parent; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
295 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
296 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
297 if (ngx_rbt_is_black(w->right)) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
298 ngx_rbt_black(w->left); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
299 ngx_rbt_red(w); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
300 ngx_rbtree_right_rotate(root, sentinel, w); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
301 w = temp->parent->right; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
302 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
303 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
304 ngx_rbt_copy_color(w, temp->parent); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
305 ngx_rbt_black(temp->parent); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
306 ngx_rbt_black(w->right); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
307 ngx_rbtree_left_rotate(root, sentinel, temp->parent); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
308 temp = *root; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
309 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
310 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
311 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
312 w = temp->parent->left; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
313 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
314 if (ngx_rbt_is_red(w)) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
315 ngx_rbt_black(w); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
316 ngx_rbt_red(temp->parent); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
317 ngx_rbtree_right_rotate(root, sentinel, temp->parent); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
318 w = temp->parent->left; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
319 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
320 |
213
f536f91e8e99
nginx-0.0.1-2003-12-19-15:45:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
212
diff
changeset
|
321 if (ngx_rbt_is_black(w->left) && ngx_rbt_is_black(w->right)) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
322 ngx_rbt_red(w); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
323 temp = temp->parent; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
324 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
325 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
326 if (ngx_rbt_is_black(w->left)) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
327 ngx_rbt_black(w->right); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
328 ngx_rbt_red(w); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
329 ngx_rbtree_left_rotate(root, sentinel, w); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
330 w = temp->parent->left; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
331 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
332 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
333 ngx_rbt_copy_color(w, temp->parent); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
334 ngx_rbt_black(temp->parent); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
335 ngx_rbt_black(w->left); |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
336 ngx_rbtree_right_rotate(root, sentinel, temp->parent); |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
337 temp = *root; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
338 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
339 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
340 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
341 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
342 ngx_rbt_black(temp); |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
343 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
344 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
345 |
493 | 346 static ngx_inline void |
559 | 347 ngx_rbtree_left_rotate(ngx_rbtree_node_t **root, ngx_rbtree_node_t *sentinel, |
348 ngx_rbtree_node_t *node) | |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
349 { |
559 | 350 ngx_rbtree_node_t *temp; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
351 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
352 temp = node->right; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
353 node->right = temp->left; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
354 |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
355 if (temp->left != sentinel) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
356 temp->left->parent = node; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
357 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
358 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
359 temp->parent = node->parent; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
360 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
361 if (node == *root) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
362 *root = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
363 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
364 } else if (node == node->parent->left) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
365 node->parent->left = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
366 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
367 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
368 node->parent->right = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
369 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
370 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
371 temp->left = node; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
372 node->parent = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
373 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
374 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
375 |
493 | 376 static ngx_inline void |
559 | 377 ngx_rbtree_right_rotate(ngx_rbtree_node_t **root, ngx_rbtree_node_t *sentinel, |
378 ngx_rbtree_node_t *node) | |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
379 { |
559 | 380 ngx_rbtree_node_t *temp; |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
381 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
382 temp = node->left; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
383 node->left = temp->right; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
384 |
207
6e0fef527732
nginx-0.0.1-2003-12-05-20:07:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
206
diff
changeset
|
385 if (temp->right != sentinel) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
386 temp->right->parent = node; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
387 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
388 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
389 temp->parent = node->parent; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
390 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
207
diff
changeset
|
391 if (node == *root) { |
205
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
392 *root = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
393 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
394 } else if (node == node->parent->right) { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
395 node->parent->right = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
396 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
397 } else { |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
398 node->parent->left = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
399 } |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
400 |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
401 temp->right = node; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
402 node->parent = temp; |
4a9a2b1dd6fa
nginx-0.0.1-2003-12-04-17:53:00 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
403 } |