Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 1765:b0cbe16febaf
use ngx_queue.h
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 21 Dec 2007 15:33:15 +0000 |
parents | 1c4b231ba90c |
children | 111eb827ed44 |
rev | line source |
---|---|
1453 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_event.h> | |
10 | |
11 | |
12 /* | |
13 * open file cache caches | |
14 * open file handles with stat() info; | |
15 * directories stat() info; | |
16 * files and directories errors: not found, access denied, etc. | |
17 */ | |
18 | |
19 | |
20 static void ngx_open_file_cache_cleanup(void *data); | |
21 static void ngx_open_file_cleanup(void *data); | |
22 static void ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
23 ngx_cached_open_file_t *file, ngx_log_t *log); | |
24 static ngx_int_t ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, | |
25 ngx_log_t *log); | |
26 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, | |
27 ngx_uint_t n, ngx_log_t *log); | |
28 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
29 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
30 static void ngx_open_file_cache_remove(ngx_event_t *ev); | |
31 | |
32 | |
33 ngx_open_file_cache_t * | |
34 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive) | |
35 { | |
36 ngx_pool_cleanup_t *cln; | |
37 ngx_open_file_cache_t *cache; | |
38 | |
39 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t)); | |
40 if (cache == NULL) { | |
41 return NULL; | |
42 } | |
43 | |
1761 | 44 ngx_rbtree_init(&cache->rbtree, &cache->sentinel, |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1458
diff
changeset
|
45 ngx_open_file_cache_rbtree_insert_value); |
1453 | 46 |
1765 | 47 ngx_queue_init(&cache->expire_queue); |
48 | |
1453 | 49 cache->current = 0; |
50 cache->max = max; | |
51 cache->inactive = inactive; | |
52 | |
53 cln = ngx_pool_cleanup_add(pool, 0); | |
54 if (cln == NULL) { | |
55 return NULL; | |
56 } | |
57 | |
58 cln->handler = ngx_open_file_cache_cleanup; | |
59 cln->data = cache; | |
60 | |
61 return cache; | |
62 } | |
63 | |
64 | |
65 static void | |
66 ngx_open_file_cache_cleanup(void *data) | |
67 { | |
68 ngx_open_file_cache_t *cache = data; | |
69 | |
1765 | 70 ngx_queue_t *q; |
1453 | 71 ngx_cached_open_file_t *file; |
72 | |
73 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
74 "open file cache cleanup"); | |
75 | |
76 for ( ;; ) { | |
77 | |
1765 | 78 if (ngx_queue_empty(&cache->expire_queue)) { |
79 return; | |
1453 | 80 } |
81 | |
1765 | 82 q = ngx_queue_last(&cache->expire_queue); |
83 | |
84 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
85 | |
86 ngx_queue_remove(q); | |
1453 | 87 |
88 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
89 | |
90 cache->current--; | |
91 | |
92 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
93 "delete cached open file: %s", file->name); | |
94 | |
95 if (!file->err && !file->is_dir) { | |
96 file->close = 1; | |
97 file->count = 0; | |
98 ngx_close_cached_file(cache, file, ngx_cycle->log); | |
99 | |
100 } else { | |
101 ngx_free(file->name); | |
102 ngx_free(file); | |
103 } | |
104 } | |
105 | |
106 if (cache->current) { | |
107 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
108 "%d items still leave in open file cache", | |
109 cache->current); | |
110 } | |
111 | |
112 if (cache->rbtree.root != cache->rbtree.sentinel) { | |
113 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
114 "rbtree still is not empty in open file cache"); | |
115 | |
116 } | |
117 } | |
118 | |
119 | |
120 ngx_int_t | |
121 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
122 ngx_open_file_info_t *of, ngx_pool_t *pool) | |
123 { | |
124 time_t now; | |
125 uint32_t hash; | |
126 ngx_int_t rc; | |
127 ngx_rbtree_node_t *node, *sentinel; | |
128 ngx_pool_cleanup_t *cln; | |
129 ngx_cached_open_file_t *file; | |
130 ngx_pool_cleanup_file_t *clnf; | |
131 ngx_open_file_cache_event_t *fev; | |
132 ngx_open_file_cache_cleanup_t *ofcln; | |
133 | |
134 of->err = 0; | |
135 | |
136 if (cache == NULL) { | |
137 | |
138 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); | |
139 if (cln == NULL) { | |
140 return NGX_ERROR; | |
141 } | |
142 | |
143 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
144 | |
145 if (rc == NGX_OK && !of->is_dir) { | |
146 cln->handler = ngx_pool_cleanup_file; | |
147 clnf = cln->data; | |
148 | |
149 clnf->fd = of->fd; | |
150 clnf->name = name->data; | |
151 clnf->log = pool->log; | |
152 } | |
153 | |
154 return rc; | |
155 } | |
156 | |
157 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
158 if (cln == NULL) { | |
159 return NGX_ERROR; | |
160 } | |
161 | |
162 hash = ngx_crc32_long(name->data, name->len); | |
163 | |
164 node = cache->rbtree.root; | |
165 sentinel = cache->rbtree.sentinel; | |
166 | |
167 now = ngx_time(); | |
168 | |
169 while (node != sentinel) { | |
170 | |
171 if (hash < node->key) { | |
172 node = node->left; | |
173 continue; | |
174 } | |
175 | |
176 if (hash > node->key) { | |
177 node = node->right; | |
178 continue; | |
179 } | |
180 | |
181 /* hash == node->key */ | |
182 | |
183 do { | |
184 file = (ngx_cached_open_file_t *) node; | |
185 | |
186 rc = ngx_strcmp(name->data, file->name); | |
187 | |
188 if (rc == 0) { | |
189 | |
1765 | 190 ngx_queue_remove(&file->queue); |
1453 | 191 |
192 if (file->event || now - file->created < of->retest) { | |
193 if (file->err == 0) { | |
194 of->fd = file->fd; | |
195 of->uniq = file->uniq; | |
196 of->mtime = file->mtime; | |
197 of->size = file->size; | |
198 | |
199 of->is_dir = file->is_dir; | |
200 of->is_file = file->is_file; | |
201 of->is_link = file->is_link; | |
202 of->is_exec = file->is_exec; | |
203 | |
204 if (!file->is_dir) { | |
205 file->count++; | |
206 } | |
207 | |
208 } else { | |
209 of->err = file->err; | |
210 } | |
211 | |
212 goto found; | |
213 } | |
214 | |
215 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
216 "retest open file: %s, fd:%d, c:%d, e:%d", | |
217 file->name, file->fd, file->count, file->err); | |
218 | |
219 if (file->is_dir) { | |
220 | |
221 /* | |
222 * chances that directory became file are very small | |
223 * so test_dir flag allows to use a single ngx_file_info() | |
224 * syscall instead of three syscalls | |
225 */ | |
226 | |
227 of->test_dir = 1; | |
228 } | |
229 | |
230 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
231 | |
232 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
233 goto failed; | |
234 } | |
235 | |
236 if (of->is_dir) { | |
237 if (file->is_dir || file->err) { | |
238 goto update; | |
239 } | |
240 | |
241 /* file became directory */ | |
242 | |
243 } else if (of->err == 0) { /* file */ | |
244 | |
245 if (file->is_dir || file->err) { | |
246 goto update; | |
247 } | |
248 | |
249 if (of->uniq == file->uniq | |
250 && of->mtime == file->mtime | |
251 && of->size == file->size) | |
252 { | |
253 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
254 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
255 ngx_close_file_n " \"%s\" failed", | |
256 name->data); | |
257 } | |
258 | |
259 of->fd = file->fd; | |
260 file->count++; | |
261 | |
262 goto renew; | |
263 } | |
264 | |
265 /* file was changed */ | |
266 | |
267 } else { /* error to cache */ | |
268 | |
269 if (file->err || file->is_dir) { | |
270 goto update; | |
271 } | |
272 | |
273 /* file was removed, etc. */ | |
274 } | |
275 | |
276 if (file->count == 0) { | |
277 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
278 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
279 ngx_close_file_n " \"%s\" failed", | |
280 name->data); | |
281 } | |
282 | |
283 goto update; | |
284 } | |
285 | |
286 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
287 | |
288 cache->current--; | |
289 | |
290 file->close = 1; | |
291 | |
292 goto create; | |
293 } | |
294 | |
295 node = (rc < 0) ? node->left : node->right; | |
296 | |
297 } while (node != sentinel && hash == node->key); | |
298 | |
299 break; | |
300 } | |
301 | |
302 /* not found */ | |
303 | |
304 file = NULL; | |
305 | |
306 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
307 | |
308 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
309 goto failed; | |
310 } | |
311 | |
312 create: | |
313 | |
314 if (cache->current >= cache->max) { | |
315 ngx_expire_old_cached_files(cache, 0, pool->log); | |
316 } | |
317 | |
318 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
319 | |
320 if (file == NULL) { | |
321 goto failed; | |
322 } | |
323 | |
324 file->name = ngx_alloc(name->len + 1, pool->log); | |
325 | |
326 if (file->name == NULL) { | |
327 ngx_free(file); | |
328 file = NULL; | |
329 goto failed; | |
330 } | |
331 | |
332 ngx_cpystrn(file->name, name->data, name->len + 1); | |
333 | |
334 file->node.key = hash; | |
335 | |
336 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
337 | |
338 cache->current++; | |
339 | |
340 file->count = 0; | |
341 | |
342 update: | |
343 | |
1458
614090b26fbf
test the most relevant condition first
Igor Sysoev <igor@sysoev.ru>
parents:
1457
diff
changeset
|
344 if (of->events |
614090b26fbf
test the most relevant condition first
Igor Sysoev <igor@sysoev.ru>
parents:
1457
diff
changeset
|
345 && (ngx_event_flags & NGX_USE_VNODE_EVENT) |
1457 | 346 && of->fd != NGX_INVALID_FILE) |
347 { | |
1453 | 348 file->event = ngx_calloc(sizeof(ngx_event_t), pool->log); |
349 if (file->event== NULL) { | |
350 goto failed; | |
351 } | |
352 | |
353 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), pool->log); | |
354 if (fev == NULL) { | |
355 goto failed; | |
356 } | |
357 | |
358 fev->fd = of->fd; | |
359 fev->file = file; | |
360 fev->cache = cache; | |
361 | |
362 file->event->handler = ngx_open_file_cache_remove; | |
363 file->event->data = fev; | |
364 | |
365 /* | |
366 * although vnode event may be called while ngx_cycle->poll | |
367 * destruction; however, cleanup procedures are run before any | |
368 * memory freeing and events will be canceled. | |
369 */ | |
370 | |
371 file->event->log = ngx_cycle->log; | |
372 | |
373 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
374 != NGX_OK) | |
375 { | |
376 ngx_free(file->event->data); | |
377 ngx_free(file->event); | |
378 goto failed; | |
379 } | |
380 | |
381 } else { | |
382 file->event = NULL; | |
383 } | |
384 | |
385 file->fd = of->fd; | |
386 file->err = of->err; | |
387 | |
388 if (of->err == 0) { | |
389 file->uniq = of->uniq; | |
390 file->mtime = of->mtime; | |
391 file->size = of->size; | |
392 | |
393 file->close = 0; | |
394 | |
395 file->is_dir = of->is_dir; | |
396 file->is_file = of->is_file; | |
397 file->is_link = of->is_link; | |
398 file->is_exec = of->is_exec; | |
399 | |
400 if (!of->is_dir) { | |
401 file->count++; | |
402 } | |
403 } | |
404 | |
405 renew: | |
406 | |
407 file->created = now; | |
408 | |
409 found: | |
410 | |
411 file->accessed = now; | |
412 | |
1765 | 413 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 414 |
415 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
416 "cached open file: %s, fd:%d, c:%d, e:%d", | |
417 file->name, file->fd, file->count, file->err); | |
418 | |
419 if (of->err == 0) { | |
420 | |
421 if (!of->is_dir) { | |
422 cln->handler = ngx_open_file_cleanup; | |
423 ofcln = cln->data; | |
424 | |
425 ofcln->cache = cache; | |
426 ofcln->file = file; | |
427 ofcln->log = pool->log; | |
428 } | |
429 | |
430 return NGX_OK; | |
431 } | |
432 | |
433 return NGX_ERROR; | |
434 | |
435 failed: | |
436 | |
437 if (file && file->count == 0) { | |
438 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
439 | |
440 cache->current--; | |
441 | |
442 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
443 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
444 ngx_close_file_n " \"%s\" failed", file->name); | |
445 } | |
446 | |
447 ngx_free(file->name); | |
448 ngx_free(file); | |
449 } | |
450 | |
451 if (of->fd != NGX_INVALID_FILE) { | |
452 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
453 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
454 ngx_close_file_n " \"%s\" failed", name->data); | |
455 } | |
456 } | |
457 | |
458 return NGX_ERROR; | |
459 } | |
460 | |
461 | |
462 static ngx_int_t | |
463 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
464 { | |
465 ngx_fd_t fd; | |
466 ngx_file_info_t fi; | |
467 | |
468 of->fd = NGX_INVALID_FILE; | |
469 | |
470 if (of->test_dir) { | |
471 | |
472 if (ngx_file_info(name, &fi) == -1) { | |
473 of->err = ngx_errno; | |
474 | |
475 return NGX_ERROR; | |
476 } | |
477 | |
478 of->uniq = ngx_file_uniq(&fi); | |
479 of->mtime = ngx_file_mtime(&fi); | |
480 of->size = ngx_file_size(&fi); | |
481 of->is_dir = ngx_is_dir(&fi); | |
482 of->is_file = ngx_is_file(&fi); | |
483 of->is_link = ngx_is_link(&fi); | |
484 of->is_exec = ngx_is_exec(&fi); | |
485 | |
486 if (of->is_dir) { | |
487 return NGX_OK; | |
488 } | |
489 } | |
490 | |
491 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
492 | |
493 if (fd == NGX_INVALID_FILE) { | |
494 of->err = ngx_errno; | |
495 return NGX_ERROR; | |
496 } | |
497 | |
498 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
499 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
500 ngx_fd_info_n " \"%s\" failed", name); | |
501 | |
502 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
503 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
504 ngx_close_file_n " \"%s\" failed", name); | |
505 } | |
506 | |
507 return NGX_ERROR; | |
508 } | |
509 | |
510 if (ngx_is_dir(&fi)) { | |
511 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
512 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
513 ngx_close_file_n " \"%s\" failed", name); | |
514 } | |
515 | |
516 fd = NGX_INVALID_FILE; | |
517 } | |
518 | |
519 of->fd = fd; | |
520 of->uniq = ngx_file_uniq(&fi); | |
521 of->mtime = ngx_file_mtime(&fi); | |
522 of->size = ngx_file_size(&fi); | |
523 of->is_dir = ngx_is_dir(&fi); | |
524 of->is_file = ngx_is_file(&fi); | |
525 of->is_link = ngx_is_link(&fi); | |
526 of->is_exec = ngx_is_exec(&fi); | |
527 | |
528 return NGX_OK; | |
529 } | |
530 | |
531 | |
532 static void | |
533 ngx_open_file_cleanup(void *data) | |
534 { | |
535 ngx_open_file_cache_cleanup_t *c = data; | |
536 | |
537 c->file->count--; | |
538 | |
539 ngx_close_cached_file(c->cache, c->file, c->log); | |
540 | |
541 /* drop one or two expired open files */ | |
542 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
543 } | |
544 | |
545 | |
546 static void | |
547 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
548 ngx_cached_open_file_t *file, ngx_log_t *log) | |
549 { | |
550 ngx_log_debug4(NGX_LOG_DEBUG_CORE, log, 0, | |
551 "close cached open file: %s, fd:%d, c:%d, %d", | |
552 file->name, file->fd, file->count, file->close); | |
553 | |
554 if (!file->close) { | |
555 | |
556 file->accessed = ngx_time(); | |
557 | |
1765 | 558 ngx_queue_remove(&file->queue); |
1453 | 559 |
1765 | 560 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 561 |
562 return; | |
563 } | |
564 | |
565 if (file->event) { | |
566 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
567 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
568 | |
569 ngx_free(file->event->data); | |
570 ngx_free(file->event); | |
571 file->event = NULL; | |
572 } | |
573 | |
574 if (file->count) { | |
575 return; | |
576 } | |
577 | |
578 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
579 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
580 ngx_close_file_n " \"%s\" failed", file->name); | |
581 } | |
582 | |
583 ngx_free(file->name); | |
584 ngx_free(file); | |
585 } | |
586 | |
587 | |
588 static void | |
589 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, | |
590 ngx_log_t *log) | |
591 { | |
592 time_t now; | |
1765 | 593 ngx_queue_t *q; |
1453 | 594 ngx_cached_open_file_t *file; |
595 | |
596 now = ngx_time(); | |
597 | |
598 /* | |
599 * n == 1 deletes one or two inactive files | |
600 * n == 0 deletes least recently used file by force | |
601 * and one or two inactive files | |
602 */ | |
603 | |
604 while (n < 3) { | |
605 | |
1765 | 606 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 607 return; |
608 } | |
609 | |
1765 | 610 q = ngx_queue_last(&cache->expire_queue); |
611 | |
612 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
613 | |
1453 | 614 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
615 return; | |
616 } | |
617 | |
1765 | 618 ngx_queue_remove(q); |
1453 | 619 |
620 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
621 | |
622 cache->current--; | |
623 | |
624 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
625 "expire cached open file: %s", file->name); | |
626 | |
627 if (!file->err && !file->is_dir) { | |
628 file->close = 1; | |
629 ngx_close_cached_file(cache, file, log); | |
630 | |
631 } else { | |
632 ngx_free(file->name); | |
633 ngx_free(file); | |
634 } | |
635 } | |
636 } | |
637 | |
638 | |
639 static void | |
640 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
641 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
642 { | |
643 ngx_rbtree_node_t **p; | |
644 ngx_cached_open_file_t *file, *file_temp; | |
645 | |
646 for ( ;; ) { | |
647 | |
648 if (node->key < temp->key) { | |
649 | |
650 p = &temp->left; | |
651 | |
652 } else if (node->key > temp->key) { | |
653 | |
654 p = &temp->right; | |
655 | |
656 } else { /* node->key == temp->key */ | |
657 | |
658 file = (ngx_cached_open_file_t *) node; | |
659 file_temp = (ngx_cached_open_file_t *) temp; | |
660 | |
661 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
662 ? &temp->left : &temp->right; | |
663 } | |
664 | |
665 if (*p == sentinel) { | |
666 break; | |
667 } | |
668 | |
669 temp = *p; | |
670 } | |
671 | |
672 *p = node; | |
673 node->parent = temp; | |
674 node->left = sentinel; | |
675 node->right = sentinel; | |
676 ngx_rbt_red(node); | |
677 } | |
678 | |
679 | |
680 static void | |
681 ngx_open_file_cache_remove(ngx_event_t *ev) | |
682 { | |
683 ngx_cached_open_file_t *file; | |
684 ngx_open_file_cache_event_t *fev; | |
685 | |
686 fev = ev->data; | |
687 file = fev->file; | |
688 | |
1765 | 689 ngx_queue_remove(&file->queue); |
1453 | 690 |
691 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
692 | |
693 fev->cache->current--; | |
694 | |
695 /* NGX_ONESHOT_EVENT was already deleted */ | |
696 file->event = NULL; | |
697 | |
698 file->close = 1; | |
699 | |
700 ngx_close_cached_file(fev->cache, file, ev->log); | |
701 | |
702 /* free memory only when fev->cache and fev->file are already not needed */ | |
703 | |
704 ngx_free(ev->data); | |
705 ngx_free(ev); | |
706 } |