Mercurial > hg > nginx
annotate src/core/ngx_palloc.c @ 1178:a77f6980de50
rename $r->rflush to $r->flush
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sat, 21 Apr 2007 07:43:23 +0000 |
parents | 4d203f76b757 |
children | 103988cef757 |
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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5 |
0
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6 |
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7 #include <ngx_config.h> |
100
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8 #include <ngx_core.h> |
0
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9 |
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10 |
501 | 11 ngx_pool_t * |
12 ngx_create_pool(size_t size, ngx_log_t *log) | |
0
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13 { |
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14 ngx_pool_t *p; |
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15 |
501 | 16 p = ngx_alloc(size, log); |
17 if (p == NULL) { | |
527 | 18 return NULL; |
194
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19 } |
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20 |
485 | 21 p->last = (u_char *) p + sizeof(ngx_pool_t); |
22 p->end = (u_char *) p + size; | |
581 | 23 p->current = p; |
24 p->chain = NULL; | |
0
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25 p->next = NULL; |
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26 p->large = NULL; |
509 | 27 p->cleanup = NULL; |
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28 p->log = log; |
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29 |
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30 return p; |
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31 } |
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32 |
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33 |
501 | 34 void |
35 ngx_destroy_pool(ngx_pool_t *pool) | |
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36 { |
509 | 37 ngx_pool_t *p, *n; |
38 ngx_pool_large_t *l; | |
39 ngx_pool_cleanup_t *c; | |
40 | |
41 for (c = pool->cleanup; c; c = c->next) { | |
42 if (c->handler) { | |
43 c->handler(c->data); | |
44 } | |
45 } | |
0
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46 |
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47 for (l = pool->large; l; l = l->next) { |
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48 |
461 | 49 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); |
257
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50 |
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51 if (l->alloc) { |
477 | 52 ngx_free(l->alloc); |
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53 } |
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54 } |
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55 |
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56 #if (NGX_DEBUG) |
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57 |
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58 /* |
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59 * we could allocate the pool->log from this pool |
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60 * so we can not use this log while the free()ing the pool |
128
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61 */ |
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62 |
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63 for (p = pool, n = pool->next; /* void */; p = n, n = n->next) { |
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64 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
461 | 65 "free: %p, unused: %uz", p, p->end - p->last); |
133
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66 |
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67 if (n == NULL) { |
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68 break; |
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69 } |
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70 } |
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71 |
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72 #endif |
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73 |
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74 for (p = pool, n = pool->next; /* void */; p = n, n = n->next) { |
477 | 75 ngx_free(p); |
128
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76 |
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77 if (n == NULL) { |
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78 break; |
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79 } |
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80 } |
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81 } |
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82 |
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83 |
501 | 84 void * |
85 ngx_palloc(ngx_pool_t *pool, size_t size) | |
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86 { |
485 | 87 u_char *m; |
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88 ngx_pool_t *p, *n, *current; |
629 | 89 ngx_pool_large_t *large; |
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90 |
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91 if (size <= (size_t) NGX_MAX_ALLOC_FROM_POOL |
485 | 92 && size <= (size_t) (pool->end - (u_char *) pool) |
589 | 93 - (size_t) ngx_align_ptr(sizeof(ngx_pool_t), NGX_ALIGNMENT)) |
429
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94 { |
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95 p = pool->current; |
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96 current = p; |
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97 |
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98 for ( ;; ) { |
589 | 99 |
100 if (size < sizeof(int) || (size & 1)) { | |
101 m = p->last; | |
102 | |
103 } else { | |
104 m = ngx_align_ptr(p->last, NGX_ALIGNMENT); | |
105 } | |
104
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106 |
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107 if ((size_t) (p->end - m) >= size) { |
452 | 108 p->last = m + size; |
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109 |
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110 return m; |
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111 } |
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112 |
581 | 113 if ((size_t) (p->end - m) < NGX_ALIGNMENT) { |
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114 current = p->next; |
581 | 115 } |
116 | |
117 if (p->next == NULL) { | |
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118 break; |
39
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119 } |
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120 |
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121 p = p->next; |
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122 pool->current = current; |
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123 } |
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124 |
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125 /* allocate a new pool block */ |
156
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126 |
501 | 127 n = ngx_create_pool((size_t) (p->end - (u_char *) p), p->log); |
128 if (n == NULL) { | |
194
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129 return NULL; |
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130 } |
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131 |
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132 pool->current = current ? current : n; |
581 | 133 |
0
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134 p->next = n; |
589 | 135 m = ngx_align_ptr(n->last, NGX_ALIGNMENT); |
452 | 136 n->last = m + size; |
156
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137 |
0
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138 return m; |
156
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139 } |
0
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140 |
347
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141 #if 0 |
501 | 142 p = ngx_memalign(ngx_pagesize, size, pool->log); |
143 if (p == NULL) { | |
194
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144 return NULL; |
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145 } |
347
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146 #else |
501 | 147 p = ngx_alloc(size, pool->log); |
148 if (p == NULL) { | |
347
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149 return NULL; |
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150 } |
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151 #endif |
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152 |
629 | 153 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
154 if (large == NULL) { | |
155 return NULL; | |
156
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156 } |
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157 |
156
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158 large->alloc = p; |
629 | 159 large->next = pool->large; |
160 pool->large = large; | |
156
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161 |
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162 return p; |
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163 } |
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164 |
0
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165 |
501 | 166 ngx_int_t |
167 ngx_pfree(ngx_pool_t *pool, void *p) | |
156
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168 { |
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169 ngx_pool_large_t *l; |
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170 |
156
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171 for (l = pool->large; l; l = l->next) { |
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172 if (p == l->alloc) { |
257
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173 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
461 | 174 "free: %p", l->alloc); |
477 | 175 ngx_free(l->alloc); |
156
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176 l->alloc = NULL; |
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177 |
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178 return NGX_OK; |
156
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179 } |
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180 } |
436
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181 |
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182 return NGX_DECLINED; |
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183 } |
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184 |
156
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185 |
501 | 186 void * |
187 ngx_pcalloc(ngx_pool_t *pool, size_t size) | |
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188 { |
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189 void *p; |
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190 |
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191 p = ngx_palloc(pool, size); |
39
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192 if (p) { |
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193 ngx_memzero(p, size); |
39
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194 } |
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195 |
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196 return p; |
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197 } |
346
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198 |
509 | 199 |
200 ngx_pool_cleanup_t * | |
563 | 201 ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) |
509 | 202 { |
203 ngx_pool_cleanup_t *c; | |
204 | |
205 c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); | |
206 if (c == NULL) { | |
207 return NULL; | |
208 } | |
209 | |
563 | 210 if (size) { |
211 c->data = ngx_palloc(p, size); | |
212 if (c->data == NULL) { | |
213 return NULL; | |
214 } | |
215 | |
216 } else { | |
217 c->data = NULL; | |
218 } | |
219 | |
220 c->handler = NULL; | |
509 | 221 c->next = p->cleanup; |
222 | |
223 p->cleanup = c; | |
224 | |
563 | 225 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); |
226 | |
509 | 227 return c; |
228 } | |
229 | |
230 | |
231 void | |
232 ngx_pool_cleanup_file(void *data) | |
233 { | |
234 ngx_pool_cleanup_file_t *c = data; | |
235 | |
563 | 236 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "run cleanup: %p, fd:%d", |
237 c, c->fd); | |
238 | |
509 | 239 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
240 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, | |
241 ngx_close_file_n " \"%s\" failed", c->name); | |
242 } | |
243 } | |
244 | |
245 | |
1075
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246 void |
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247 ngx_pool_delete_file(void *data) |
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248 { |
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249 ngx_pool_cleanup_file_t *c = data; |
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250 |
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251 ngx_err_t err; |
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252 |
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253 ngx_log_debug3(NGX_LOG_DEBUG_ALLOC, c->log, 0, "run cleanup: %p, fd:%d %s", |
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254 c, c->fd, c->name); |
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255 |
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256 if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { |
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257 err = ngx_errno; |
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258 |
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259 if (err != NGX_ENOENT) { |
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260 ngx_log_error(NGX_LOG_CRIT, c->log, err, |
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261 ngx_delete_file_n " \"%s\" failed", c->name); |
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262 } |
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263 } |
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264 |
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265 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
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266 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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267 ngx_close_file_n " \"%s\" failed", c->name); |
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268 } |
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269 } |
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270 |
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271 |
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272 #if 0 |
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273 |
501 | 274 static void * |
275 ngx_get_cached_block(size_t size) | |
346
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276 { |
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277 void *p; |
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278 ngx_cached_block_slot_t *slot; |
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279 |
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280 if (ngx_cycle->cache == NULL) { |
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281 return NULL; |
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282 } |
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283 |
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284 slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; |
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285 |
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286 slot->tries++; |
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287 |
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288 if (slot->number) { |
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289 p = slot->block; |
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290 slot->block = slot->block->next; |
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291 slot->number--; |
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292 return p; |
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293 } |
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294 |
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295 return NULL; |
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296 } |
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297 |
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298 #endif |