Mercurial > hg > nginx

annotate src/core/ngx_radix_tree.c @ 2366:3aa4fd0e7dc5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fix comment
author Igor Sysoev <igor@sysoev.ru>
date Tue, 02 Dec 2008 16:50:56 +0000
parents 78415b0469bc
children 62be1c4edfba d620f497c50f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
444
42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
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6
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
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11 static void *ngx_radix_alloc(ngx_radix_tree_t *tree);
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13
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14 ngx_radix_tree_t *
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15 ngx_radix_tree_create(ngx_pool_t *pool, ngx_int_t preallocate)
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16 {
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17 uint32_t key, mask, inc;
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18 ngx_radix_tree_t *tree;
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19
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20 tree = ngx_palloc(pool, sizeof(ngx_radix_tree_t));
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21 if (tree == NULL) {
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22 return NULL;
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23 }
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24
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
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25 tree->pool = pool;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
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26 tree->free = NULL;
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41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
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27 tree->start = NULL;
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28 tree->size = 0;
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29
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30 tree->root = ngx_radix_alloc(tree);
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31 if (tree->root == NULL) {
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32 return NULL;
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33 }
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34
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35 tree->root->right = NULL;
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36 tree->root->left = NULL;
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37 tree->root->parent = NULL;
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38 tree->root->value = NGX_RADIX_NO_VALUE;
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39
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40 if (preallocate == 0) {
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41 return tree;
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42 }
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43
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44 /*
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45 * Preallocation of first nodes : 0, 1, 00, 01, 10, 11, 000, 001, etc.
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46 * increases TLB hits even if for first lookup iterations.
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47 * On 32-bit platforms the 7 preallocated bits takes continuous 4K,
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48 * 8 - 8K, 9 - 16K, etc. On 64-bit platforms the 6 preallocated bits
489
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49 * takes continuous 4K, 7 - 8K, 8 - 16K, etc. There is no sense to
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50 * to preallocate more than one page, because further preallocation
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51 * distributes the only bit per page. Instead, a random insertion
489
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52 * may distribute several bits per page.
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53 *
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54 * Thus, by default we preallocate maximum
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55 * 6 bits on amd64 (64-bit platform and 4K pages)
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56 * 7 bits on i386 (32-bit platform and 4K pages)
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57 * 7 bits on sparc64 in 64-bit mode (8K pages)
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58 * 8 bits on sparc64 in 32-bit mode (8K pages)
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59 */
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60
489
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61 if (preallocate == -1) {
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62 switch (ngx_pagesize / sizeof(ngx_radix_tree_t)) {
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63
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64 /* amd64 */
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65 case 128:
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66 preallocate = 6;
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67 break;
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68
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69 /* i386, sparc64 */
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70 case 256:
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71 preallocate = 7;
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72 break;
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73
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74 /* sparc64 in 32-bit mode */
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75 default:
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76 preallocate = 8;
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77 }
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78 }
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79
487
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80 mask = 0;
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81 inc = 0x80000000;
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82
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83 while (preallocate--) {
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84
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85 key = 0;
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86 mask >>= 1;
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87 mask |= 0x80000000;
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88
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89 do {
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90 if (ngx_radix32tree_insert(tree, key, mask, NGX_RADIX_NO_VALUE)
1130
119605405c4b style fix
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91 != NGX_OK)
487
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92 {
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93 return NULL;
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94 }
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95
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96 key += inc;
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97
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98 } while (key);
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99
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100 inc >>= 1;
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101 }
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102
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103 return tree;
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104 }
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105
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106
487
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107 ngx_int_t
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108 ngx_radix32tree_insert(ngx_radix_tree_t *tree, uint32_t key, uint32_t mask,
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109 uintptr_t value)
340
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110 {
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111 uint32_t bit;
342
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112 ngx_radix_node_t *node, *next;
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113
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114 bit = 0x80000000;
485
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115
342
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116 node = tree->root;
485
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117 next = tree->root;
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118
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119 while (bit & mask) {
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120 if (key & bit) {
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121 next = node->right;
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122
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123 } else {
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124 next = node->left;
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125 }
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126
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
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127 if (next == NULL) {
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128 break;
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129 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
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130
485
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131 bit >>= 1;
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
132 node = next;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
133 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
134
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
135 if (next) {
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
136 if (node->value != NGX_RADIX_NO_VALUE) {
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
137 return NGX_BUSY;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
138 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
139
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
140 node->value = value;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
141 return NGX_OK;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
142 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
143
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
144 while (bit & mask) {
501
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 499
diff changeset
145 next = ngx_radix_alloc(tree);
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 499
diff changeset
146 if (next == NULL) {
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
147 return NGX_ERROR;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
148 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
149
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
150 next->right = NULL;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
151 next->left = NULL;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
152 next->parent = node;
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
153 next->value = NGX_RADIX_NO_VALUE;
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
154
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
155 if (key & bit) {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
156 node->right = next;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
157
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
158 } else {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
159 node->left = next;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
160 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
161
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
162 bit >>= 1;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
163 node = next;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
164 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
165
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
166 node->value = value;
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
167
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
168 return NGX_OK;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
169 }
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
170
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
171
487
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
172 ngx_int_t
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
173 ngx_radix32tree_delete(ngx_radix_tree_t *tree, uint32_t key, uint32_t mask)
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
174 {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
175 uint32_t bit;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
176 ngx_radix_node_t *node;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
177
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
178 bit = 0x80000000;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
179 node = tree->root;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
180
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
181 while (node && (bit & mask)) {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
182 if (key & bit) {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
183 node = node->right;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
184
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
185 } else {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
186 node = node->left;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
188
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
189 bit >>= 1;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
190 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
191
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
192 if (node == NULL) {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
193 return NGX_ERROR;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
194 }
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
195
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
196 if (node->right || node->left) {
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
197 if (node->value != NGX_RADIX_NO_VALUE) {
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
198 node->value = NGX_RADIX_NO_VALUE;
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
199 return NGX_OK;
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
200 }
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
201
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
202 return NGX_ERROR;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
203 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
204
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
205 for ( ;; ) {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
206 if (node->parent->right == node) {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
207 node->parent->right = NULL;
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
208
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
209 } else {
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
210 node->parent->left = NULL;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
213 node->right = tree->free;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
214 tree->free = node;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
216 node = node->parent;
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
217
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
218 if (node->right || node->left) {
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
219 break;
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
220 }
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
221
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
222 if (node->value != NGX_RADIX_NO_VALUE) {
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
223 break;
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
224 }
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
225
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
226 if (node->parent == NULL) {
342
0ee0642af5f1 nginx-0.0.3-2004-05-26-23:33:53 import
Igor Sysoev <igor@sysoev.ru>
parents: 341
diff changeset
227 break;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 return NGX_OK;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234
487
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
235 uintptr_t
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
236 ngx_radix32tree_find(ngx_radix_tree_t *tree, uint32_t key)
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
237 {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
238 uint32_t bit;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
239 uintptr_t value;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
240 ngx_radix_node_t *node;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
241
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
242 bit = 0x80000000;
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
243 value = NGX_RADIX_NO_VALUE;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
244 node = tree->root;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
245
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
246 while (node) {
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
247 if (node->value != NGX_RADIX_NO_VALUE) {
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
248 value = node->value;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
249 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
250
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
251 if (key & bit) {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
252 node = node->right;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
253
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
254 } else {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
255 node = node->left;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
256 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
257
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
258 bit >>= 1;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
259 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
260
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
261 return value;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
262 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
263
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
264
487
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
265 static void *
31ff3e943e16 nginx-0.1.18-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 485
diff changeset
266 ngx_radix_alloc(ngx_radix_tree_t *tree)
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
267 {
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
268 char *p;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
269
341
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
270 if (tree->free) {
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
271 p = (char *) tree->free;
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
272 tree->free = tree->free->right;
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
273 return p;
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
274 }
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
275
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
276 if (tree->size < sizeof(ngx_radix_node_t)) {
2221
78415b0469bc use ngx_pmemalign() to allocate radix pages
Igor Sysoev <igor@sysoev.ru>
parents: 1130
diff changeset
277 tree->start = ngx_pmemalign(tree->pool, ngx_pagesize, ngx_pagesize);
501
d4ea69372b94 nginx-0.1.25-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 499
diff changeset
278 if (tree->start == NULL) {
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
279 return NULL;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
280 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
281
351
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
Igor Sysoev <igor@sysoev.ru>
parents: 342
diff changeset
282 tree->size = ngx_pagesize;
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
283 }
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
284
341
41e552841296 nginx-0.0.3-2004-05-26-19:30:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 340
diff changeset
285 p = tree->start;
485
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
286 tree->start += sizeof(ngx_radix_node_t);
4ebe09b07e30 nginx-0.1.17-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
287 tree->size -= sizeof(ngx_radix_node_t);
340
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
288
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
289 return p;
0bf903191ceb nginx-0.0.3-2004-05-25-19:28:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
290 }