Mercurial > hg > nginx-quic
annotate src/core/ngx_palloc.c @ 6453:12248fe20689
Core: introduced the ngx_palloc_small() function.
It deduplicates some code for allocations from memory pool.
No functional changes.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Wed, 23 Mar 2016 17:44:04 +0300 |
parents | 6be7e59fdd2c |
children | f61472978419 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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11 |
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12 static ngx_inline void *ngx_palloc_small(ngx_pool_t *pool, size_t size, |
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13 ngx_uint_t align); |
2049 | 14 static void *ngx_palloc_block(ngx_pool_t *pool, size_t size); |
15 static void *ngx_palloc_large(ngx_pool_t *pool, size_t size); | |
16 | |
17 | |
501 | 18 ngx_pool_t * |
19 ngx_create_pool(size_t size, ngx_log_t *log) | |
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20 { |
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21 ngx_pool_t *p; |
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22 |
3388 | 23 p = ngx_memalign(NGX_POOL_ALIGNMENT, size, log); |
501 | 24 if (p == NULL) { |
527 | 25 return NULL; |
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26 } |
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27 |
2049 | 28 p->d.last = (u_char *) p + sizeof(ngx_pool_t); |
29 p->d.end = (u_char *) p + size; | |
30 p->d.next = NULL; | |
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31 p->d.failed = 0; |
2049 | 32 |
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33 size = size - sizeof(ngx_pool_t); |
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34 p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL; |
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35 |
581 | 36 p->current = p; |
37 p->chain = NULL; | |
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38 p->large = NULL; |
509 | 39 p->cleanup = NULL; |
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40 p->log = log; |
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41 |
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42 return p; |
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43 } |
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44 |
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45 |
501 | 46 void |
47 ngx_destroy_pool(ngx_pool_t *pool) | |
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48 { |
509 | 49 ngx_pool_t *p, *n; |
50 ngx_pool_large_t *l; | |
51 ngx_pool_cleanup_t *c; | |
52 | |
53 for (c = pool->cleanup; c; c = c->next) { | |
54 if (c->handler) { | |
1744 | 55 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
56 "run cleanup: %p", c); | |
509 | 57 c->handler(c->data); |
58 } | |
59 } | |
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60 |
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61 #if (NGX_DEBUG) |
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62 |
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63 /* |
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64 * we could allocate the pool->log from this pool |
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65 * so we cannot use this log while free()ing the pool |
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66 */ |
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67 |
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68 for (l = pool->large; l; l = l->next) { |
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69 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); |
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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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81 #endif |
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82 |
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83 for (l = pool->large; l; l = l->next) { |
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84 if (l->alloc) { |
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85 ngx_free(l->alloc); |
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86 } |
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87 } |
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88 |
2049 | 89 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
477 | 90 ngx_free(p); |
128
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91 |
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92 if (n == NULL) { |
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93 break; |
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94 } |
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95 } |
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96 } |
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98 |
2337 | 99 void |
100 ngx_reset_pool(ngx_pool_t *pool) | |
101 { | |
102 ngx_pool_t *p; | |
103 ngx_pool_large_t *l; | |
104 | |
105 for (l = pool->large; l; l = l->next) { | |
106 if (l->alloc) { | |
107 ngx_free(l->alloc); | |
108 } | |
109 } | |
110 | |
111 for (p = pool; p; p = p->d.next) { | |
112 p->d.last = (u_char *) p + sizeof(ngx_pool_t); | |
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113 p->d.failed = 0; |
2337 | 114 } |
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115 |
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116 pool->current = pool; |
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117 pool->chain = NULL; |
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118 pool->large = NULL; |
2337 | 119 } |
120 | |
121 | |
501 | 122 void * |
123 ngx_palloc(ngx_pool_t *pool, size_t size) | |
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124 { |
2049 | 125 if (size <= pool->max) { |
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126 return ngx_palloc_small(pool, size, 1); |
2049 | 127 } |
128 | |
129 return ngx_palloc_large(pool, size); | |
130 } | |
131 | |
132 | |
133 void * | |
134 ngx_pnalloc(ngx_pool_t *pool, size_t size) | |
135 { | |
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136 if (size <= pool->max) { |
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137 return ngx_palloc_small(pool, size, 0); |
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138 } |
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139 |
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140 return ngx_palloc_large(pool, size); |
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141 } |
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142 |
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143 |
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144 static ngx_inline void * |
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145 ngx_palloc_small(ngx_pool_t *pool, size_t size, ngx_uint_t align) |
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146 { |
2049 | 147 u_char *m; |
148 ngx_pool_t *p; | |
149 | |
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150 p = pool->current; |
2049 | 151 |
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152 do { |
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153 m = p->d.last; |
2049 | 154 |
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155 if (align) { |
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156 m = ngx_align_ptr(m, NGX_ALIGNMENT); |
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157 } |
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158 |
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159 if ((size_t) (p->d.end - m) >= size) { |
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160 p->d.last = m + size; |
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161 |
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162 return m; |
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163 } |
2049 | 164 |
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165 p = p->d.next; |
2049 | 166 |
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167 } while (p); |
2049 | 168 |
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169 return ngx_palloc_block(pool, size); |
2049 | 170 } |
171 | |
581 | 172 |
2049 | 173 static void * |
174 ngx_palloc_block(ngx_pool_t *pool, size_t size) | |
175 { | |
176 u_char *m; | |
2055 | 177 size_t psize; |
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178 ngx_pool_t *p, *new; |
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179 |
2055 | 180 psize = (size_t) (pool->d.end - (u_char *) pool); |
181 | |
3388 | 182 m = ngx_memalign(NGX_POOL_ALIGNMENT, psize, pool->log); |
2056 | 183 if (m == NULL) { |
2049 | 184 return NULL; |
185 } | |
156
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186 |
2056 | 187 new = (ngx_pool_t *) m; |
188 | |
189 new->d.end = m + psize; | |
2055 | 190 new->d.next = NULL; |
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191 new->d.failed = 0; |
2055 | 192 |
2056 | 193 m += sizeof(ngx_pool_data_t); |
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194 m = ngx_align_ptr(m, NGX_ALIGNMENT); |
2056 | 195 new->d.last = m + size; |
196 | |
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197 for (p = pool->current; p->d.next; p = p->d.next) { |
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198 if (p->d.failed++ > 4) { |
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199 pool->current = p->d.next; |
194
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200 } |
2049 | 201 } |
194
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202 |
2049 | 203 p->d.next = new; |
204 | |
205 return m; | |
206 } | |
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207 |
2049 | 208 |
209 static void * | |
210 ngx_palloc_large(ngx_pool_t *pool, size_t size) | |
211 { | |
212 void *p; | |
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213 ngx_uint_t n; |
2049 | 214 ngx_pool_large_t *large; |
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215 |
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216 p = ngx_alloc(size, pool->log); |
501 | 217 if (p == NULL) { |
347
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218 return NULL; |
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219 } |
2129 | 220 |
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221 n = 0; |
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222 |
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223 for (large = pool->large; large; large = large->next) { |
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224 if (large->alloc == NULL) { |
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225 large->alloc = p; |
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226 return p; |
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227 } |
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228 |
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229 if (n++ > 3) { |
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230 break; |
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231 } |
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232 } |
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233 |
2129 | 234 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
235 if (large == NULL) { | |
236 ngx_free(p); | |
237 return NULL; | |
238 } | |
239 | |
240 large->alloc = p; | |
241 large->next = pool->large; | |
242 pool->large = large; | |
243 | |
244 return p; | |
245 } | |
246 | |
247 | |
248 void * | |
249 ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment) | |
250 { | |
251 void *p; | |
252 ngx_pool_large_t *large; | |
253 | |
254 p = ngx_memalign(alignment, size, pool->log); | |
255 if (p == NULL) { | |
256 return NULL; | |
257 } | |
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258 |
629 | 259 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
260 if (large == NULL) { | |
1317 | 261 ngx_free(p); |
629 | 262 return NULL; |
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263 } |
0
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264 |
156
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265 large->alloc = p; |
629 | 266 large->next = pool->large; |
267 pool->large = large; | |
156
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268 |
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269 return p; |
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270 } |
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271 |
0
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272 |
501 | 273 ngx_int_t |
274 ngx_pfree(ngx_pool_t *pool, void *p) | |
156
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275 { |
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276 ngx_pool_large_t *l; |
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277 |
156
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278 for (l = pool->large; l; l = l->next) { |
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279 if (p == l->alloc) { |
257
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280 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
461 | 281 "free: %p", l->alloc); |
477 | 282 ngx_free(l->alloc); |
156
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283 l->alloc = NULL; |
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284 |
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285 return NGX_OK; |
156
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286 } |
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287 } |
436
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288 |
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289 return NGX_DECLINED; |
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290 } |
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291 |
156
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292 |
501 | 293 void * |
294 ngx_pcalloc(ngx_pool_t *pool, size_t size) | |
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295 { |
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296 void *p; |
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297 |
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298 p = ngx_palloc(pool, size); |
39
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299 if (p) { |
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300 ngx_memzero(p, size); |
39
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301 } |
0
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302 |
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303 return p; |
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304 } |
346
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305 |
509 | 306 |
307 ngx_pool_cleanup_t * | |
563 | 308 ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) |
509 | 309 { |
310 ngx_pool_cleanup_t *c; | |
311 | |
312 c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); | |
313 if (c == NULL) { | |
314 return NULL; | |
315 } | |
316 | |
563 | 317 if (size) { |
318 c->data = ngx_palloc(p, size); | |
319 if (c->data == NULL) { | |
320 return NULL; | |
321 } | |
322 | |
323 } else { | |
324 c->data = NULL; | |
325 } | |
326 | |
327 c->handler = NULL; | |
509 | 328 c->next = p->cleanup; |
329 | |
330 p->cleanup = c; | |
331 | |
563 | 332 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); |
333 | |
509 | 334 return c; |
335 } | |
336 | |
337 | |
338 void | |
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339 ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd) |
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340 { |
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341 ngx_pool_cleanup_t *c; |
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342 ngx_pool_cleanup_file_t *cf; |
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343 |
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344 for (c = p->cleanup; c; c = c->next) { |
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345 if (c->handler == ngx_pool_cleanup_file) { |
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346 |
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347 cf = c->data; |
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348 |
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349 if (cf->fd == fd) { |
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350 c->handler(cf); |
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351 c->handler = NULL; |
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352 return; |
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353 } |
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354 } |
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355 } |
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356 } |
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357 |
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358 |
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359 void |
509 | 360 ngx_pool_cleanup_file(void *data) |
361 { | |
362 ngx_pool_cleanup_file_t *c = data; | |
363 | |
1744 | 364 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d", |
365 c->fd); | |
563 | 366 |
509 | 367 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
368 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, | |
369 ngx_close_file_n " \"%s\" failed", c->name); | |
370 } | |
371 } | |
372 | |
373 | |
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374 void |
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375 ngx_pool_delete_file(void *data) |
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376 { |
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377 ngx_pool_cleanup_file_t *c = data; |
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378 |
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379 ngx_err_t err; |
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380 |
1744 | 381 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s", |
382 c->fd, c->name); | |
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383 |
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384 if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { |
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385 err = ngx_errno; |
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386 |
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387 if (err != NGX_ENOENT) { |
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388 ngx_log_error(NGX_LOG_CRIT, c->log, err, |
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389 ngx_delete_file_n " \"%s\" failed", c->name); |
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390 } |
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391 } |
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392 |
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393 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
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394 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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395 ngx_close_file_n " \"%s\" failed", c->name); |
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396 } |
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397 } |
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398 |
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399 |
346
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400 #if 0 |
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401 |
501 | 402 static void * |
403 ngx_get_cached_block(size_t size) | |
346
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404 { |
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405 void *p; |
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406 ngx_cached_block_slot_t *slot; |
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407 |
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408 if (ngx_cycle->cache == NULL) { |
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409 return NULL; |
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410 } |
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411 |
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412 slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; |
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413 |
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414 slot->tries++; |
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415 |
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416 if (slot->number) { |
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417 p = slot->block; |
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418 slot->block = slot->block->next; |
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419 slot->number--; |
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420 return p; |
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421 } |
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422 |
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423 return NULL; |
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424 } |
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425 |
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426 #endif |