Mercurial > hg > nginx
annotate src/core/ngx_palloc.c @ 2055:cca975b532bf
small optimization
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 20 Jun 2008 20:57:40 +0000 |
parents | 2a92804f4109 |
children | 3ea9a03a1803 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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10 |
2049 | 11 static void *ngx_palloc_block(ngx_pool_t *pool, size_t size); |
12 static void *ngx_palloc_large(ngx_pool_t *pool, size_t size); | |
13 | |
14 | |
501 | 15 ngx_pool_t * |
16 ngx_create_pool(size_t size, ngx_log_t *log) | |
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17 { |
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18 ngx_pool_t *p; |
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19 |
501 | 20 p = ngx_alloc(size, log); |
21 if (p == NULL) { | |
527 | 22 return NULL; |
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23 } |
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24 |
2049 | 25 p->d.last = (u_char *) p + sizeof(ngx_pool_t); |
26 p->d.end = (u_char *) p + size; | |
27 p->d.next = NULL; | |
28 | |
29 p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size - sizeof(ngx_pool_t): | |
30 NGX_MAX_ALLOC_FROM_POOL; | |
581 | 31 p->current = p; |
32 p->chain = NULL; | |
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33 p->large = NULL; |
509 | 34 p->cleanup = NULL; |
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35 p->log = log; |
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36 |
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37 return p; |
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38 } |
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39 |
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40 |
501 | 41 void |
42 ngx_destroy_pool(ngx_pool_t *pool) | |
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43 { |
509 | 44 ngx_pool_t *p, *n; |
45 ngx_pool_large_t *l; | |
46 ngx_pool_cleanup_t *c; | |
47 | |
48 for (c = pool->cleanup; c; c = c->next) { | |
49 if (c->handler) { | |
1744 | 50 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
51 "run cleanup: %p", c); | |
509 | 52 c->handler(c->data); |
53 } | |
54 } | |
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55 |
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56 for (l = pool->large; l; l = l->next) { |
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57 |
461 | 58 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); |
257
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59 |
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60 if (l->alloc) { |
477 | 61 ngx_free(l->alloc); |
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62 } |
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63 } |
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64 |
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65 #if (NGX_DEBUG) |
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66 |
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67 /* |
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68 * we could allocate the pool->log from this pool |
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69 * so we can not use this log while the free()ing the pool |
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70 */ |
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71 |
2049 | 72 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
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73 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
2049 | 74 "free: %p, unused: %uz", p, p->d.end - p->d.last); |
133
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75 |
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76 if (n == NULL) { |
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77 break; |
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78 } |
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79 } |
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80 |
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81 #endif |
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82 |
2049 | 83 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
477 | 84 ngx_free(p); |
128
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85 |
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86 if (n == NULL) { |
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87 break; |
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88 } |
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89 } |
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90 } |
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91 |
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92 |
501 | 93 void * |
94 ngx_palloc(ngx_pool_t *pool, size_t size) | |
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95 { |
2049 | 96 u_char *m; |
97 ngx_pool_t *p; | |
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98 |
2049 | 99 if (size <= pool->max) { |
100 | |
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101 p = pool->current; |
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102 |
2049 | 103 do { |
104 m = ngx_align_ptr(p->d.last, NGX_ALIGNMENT); | |
589 | 105 |
2049 | 106 if ((size_t) (p->d.end - m) >= size) { |
107 p->d.last = m + size; | |
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108 |
2049 | 109 return m; |
589 | 110 } |
104
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111 |
2049 | 112 p = p->d.next; |
113 | |
114 } while (p); | |
115 | |
116 return ngx_palloc_block(pool, size); | |
117 } | |
118 | |
119 return ngx_palloc_large(pool, size); | |
120 } | |
121 | |
122 | |
123 void * | |
124 ngx_pnalloc(ngx_pool_t *pool, size_t size) | |
125 { | |
126 u_char *m; | |
127 ngx_pool_t *p; | |
128 | |
129 if (size <= pool->max) { | |
130 | |
131 p = pool->current; | |
132 | |
133 do { | |
134 m = p->d.last; | |
135 | |
136 if ((size_t) (p->d.end - m) >= size) { | |
137 p->d.last = m + size; | |
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138 |
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139 return m; |
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140 } |
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141 |
2049 | 142 p = p->d.next; |
143 | |
144 } while (p); | |
145 | |
146 return ngx_palloc_block(pool, size); | |
147 } | |
148 | |
149 return ngx_palloc_large(pool, size); | |
150 } | |
151 | |
581 | 152 |
2049 | 153 static void * |
154 ngx_palloc_block(ngx_pool_t *pool, size_t size) | |
155 { | |
156 u_char *m; | |
2055 | 157 size_t psize; |
2049 | 158 ngx_pool_t *p, *new, *current; |
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159 |
2055 | 160 psize = (size_t) (pool->d.end - (u_char *) pool); |
161 | |
162 new = ngx_alloc(size, pool->log); | |
2049 | 163 if (new == NULL) { |
164 return NULL; | |
165 } | |
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166 |
2055 | 167 new->d.end = (u_char *) new + psize; |
168 new->d.next = NULL; | |
169 | |
2049 | 170 current = pool->current; |
171 | |
172 for (p = current; p->d.next; p = p->d.next) { | |
173 if ((size_t) (p->d.end - p->d.last) < NGX_ALIGNMENT) { | |
174 current = p->d.next; | |
194
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175 } |
2049 | 176 } |
194
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177 |
2049 | 178 p->d.next = new; |
179 | |
180 pool->current = current ? current : new; | |
581 | 181 |
2049 | 182 m = (u_char *) new + sizeof(ngx_pool_data_t); |
183 new->d.last = m + size; | |
184 | |
185 return m; | |
186 } | |
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187 |
2049 | 188 |
189 static void * | |
190 ngx_palloc_large(ngx_pool_t *pool, size_t size) | |
191 { | |
192 void *p; | |
193 ngx_pool_large_t *large; | |
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195 #if 0 |
501 | 196 p = ngx_memalign(ngx_pagesize, size, pool->log); |
197 if (p == NULL) { | |
194
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198 return NULL; |
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199 } |
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200 #else |
501 | 201 p = ngx_alloc(size, pool->log); |
202 if (p == NULL) { | |
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203 return NULL; |
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204 } |
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205 #endif |
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206 |
629 | 207 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
208 if (large == NULL) { | |
1317 | 209 ngx_free(p); |
629 | 210 return NULL; |
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211 } |
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212 |
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213 large->alloc = p; |
629 | 214 large->next = pool->large; |
215 pool->large = large; | |
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216 |
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217 return p; |
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218 } |
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219 |
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220 |
501 | 221 ngx_int_t |
222 ngx_pfree(ngx_pool_t *pool, void *p) | |
156
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223 { |
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224 ngx_pool_large_t *l; |
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225 |
156
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226 for (l = pool->large; l; l = l->next) { |
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227 if (p == l->alloc) { |
257
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228 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
461 | 229 "free: %p", l->alloc); |
477 | 230 ngx_free(l->alloc); |
156
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231 l->alloc = NULL; |
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232 |
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233 return NGX_OK; |
156
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234 } |
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235 } |
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236 |
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237 return NGX_DECLINED; |
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238 } |
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239 |
156
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240 |
501 | 241 void * |
242 ngx_pcalloc(ngx_pool_t *pool, size_t size) | |
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243 { |
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244 void *p; |
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245 |
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246 p = ngx_palloc(pool, size); |
39
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247 if (p) { |
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248 ngx_memzero(p, size); |
39
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249 } |
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250 |
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251 return p; |
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252 } |
346
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253 |
509 | 254 |
255 ngx_pool_cleanup_t * | |
563 | 256 ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) |
509 | 257 { |
258 ngx_pool_cleanup_t *c; | |
259 | |
260 c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); | |
261 if (c == NULL) { | |
262 return NULL; | |
263 } | |
264 | |
563 | 265 if (size) { |
266 c->data = ngx_palloc(p, size); | |
267 if (c->data == NULL) { | |
268 return NULL; | |
269 } | |
270 | |
271 } else { | |
272 c->data = NULL; | |
273 } | |
274 | |
275 c->handler = NULL; | |
509 | 276 c->next = p->cleanup; |
277 | |
278 p->cleanup = c; | |
279 | |
563 | 280 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); |
281 | |
509 | 282 return c; |
283 } | |
284 | |
285 | |
286 void | |
287 ngx_pool_cleanup_file(void *data) | |
288 { | |
289 ngx_pool_cleanup_file_t *c = data; | |
290 | |
1744 | 291 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d", |
292 c->fd); | |
563 | 293 |
509 | 294 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
295 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, | |
296 ngx_close_file_n " \"%s\" failed", c->name); | |
297 } | |
298 } | |
299 | |
300 | |
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301 void |
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302 ngx_pool_delete_file(void *data) |
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303 { |
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304 ngx_pool_cleanup_file_t *c = data; |
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305 |
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306 ngx_err_t err; |
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307 |
1744 | 308 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s", |
309 c->fd, c->name); | |
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310 |
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311 if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { |
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312 err = ngx_errno; |
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313 |
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314 if (err != NGX_ENOENT) { |
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315 ngx_log_error(NGX_LOG_CRIT, c->log, err, |
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316 ngx_delete_file_n " \"%s\" failed", c->name); |
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317 } |
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318 } |
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319 |
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320 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
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321 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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322 ngx_close_file_n " \"%s\" failed", c->name); |
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323 } |
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324 } |
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325 |
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326 |
346
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327 #if 0 |
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328 |
501 | 329 static void * |
330 ngx_get_cached_block(size_t size) | |
346
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331 { |
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332 void *p; |
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333 ngx_cached_block_slot_t *slot; |
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334 |
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335 if (ngx_cycle->cache == NULL) { |
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336 return NULL; |
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337 } |
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338 |
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339 slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; |
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340 |
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341 slot->tries++; |
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342 |
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343 if (slot->number) { |
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344 p = slot->block; |
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345 slot->block = slot->block->next; |
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346 slot->number--; |
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347 return p; |
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348 } |
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349 |
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350 return NULL; |
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351 } |
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352 |
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353 #endif |