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comparison src/event/modules/ngx_kqueue_module.c @ 0:f0b350454894 NGINX_0_1_0

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nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
parents
children 4b2dafa26fe2
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equal deleted inserted replaced
-1:000000000000 0:f0b350454894
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 #include <ngx_kqueue_module.h>
11
12
13 typedef struct {
14 int changes;
15 int events;
16 } ngx_kqueue_conf_t;
17
18
19 static ngx_int_t ngx_kqueue_init(ngx_cycle_t *cycle);
20 static void ngx_kqueue_done(ngx_cycle_t *cycle);
21 static ngx_int_t ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags);
22 static ngx_int_t ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags);
23 static ngx_int_t ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags);
24 static ngx_int_t ngx_kqueue_process_changes(ngx_cycle_t *cycle, ngx_uint_t try);
25 static ngx_int_t ngx_kqueue_process_events(ngx_cycle_t *cycle);
26 static ngx_inline void ngx_kqueue_dump_event(ngx_log_t *log,
27 struct kevent *kev);
28
29 static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle);
30 static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf);
31
32
33 int ngx_kqueue = -1;
34
35 /*
36 * The "change_list" should be declared as ngx_thread_volatile.
37 * However, the use of the change_list is localized in kqueue functions and
38 * is protected by the mutex so even the "icc -ipo" should not build the code
39 * with the race condition. Thus we avoid the declaration to make a more
40 * readable code.
41 */
42
43 static struct kevent *change_list, *change_list0, *change_list1;
44 static struct kevent *event_list;
45 static int max_changes, nchanges, nevents;
46
47 #if (NGX_THREADS)
48 static ngx_mutex_t *list_mutex;
49 static ngx_mutex_t *kevent_mutex;
50 #endif
51
52
53
54 static ngx_str_t kqueue_name = ngx_string("kqueue");
55
56 static ngx_command_t ngx_kqueue_commands[] = {
57
58 {ngx_string("kqueue_changes"),
59 NGX_EVENT_CONF|NGX_CONF_TAKE1,
60 ngx_conf_set_num_slot,
61 0,
62 offsetof(ngx_kqueue_conf_t, changes),
63 NULL},
64
65 {ngx_string("kqueue_events"),
66 NGX_EVENT_CONF|NGX_CONF_TAKE1,
67 ngx_conf_set_num_slot,
68 0,
69 offsetof(ngx_kqueue_conf_t, events),
70 NULL},
71
72 ngx_null_command
73 };
74
75
76 ngx_event_module_t ngx_kqueue_module_ctx = {
77 &kqueue_name,
78 ngx_kqueue_create_conf, /* create configuration */
79 ngx_kqueue_init_conf, /* init configuration */
80
81 {
82 ngx_kqueue_add_event, /* add an event */
83 ngx_kqueue_del_event, /* delete an event */
84 ngx_kqueue_add_event, /* enable an event */
85 ngx_kqueue_del_event, /* disable an event */
86 NULL, /* add an connection */
87 NULL, /* delete an connection */
88 ngx_kqueue_process_changes, /* process the changes */
89 ngx_kqueue_process_events, /* process the events */
90 ngx_kqueue_init, /* init the events */
91 ngx_kqueue_done /* done the events */
92 }
93
94 };
95
96 ngx_module_t ngx_kqueue_module = {
97 NGX_MODULE,
98 &ngx_kqueue_module_ctx, /* module context */
99 ngx_kqueue_commands, /* module directives */
100 NGX_EVENT_MODULE, /* module type */
101 NULL, /* init module */
102 NULL /* init process */
103 };
104
105
106
107 static ngx_int_t ngx_kqueue_init(ngx_cycle_t *cycle)
108 {
109 struct timespec ts;
110 ngx_kqueue_conf_t *kcf;
111
112 kcf = ngx_event_get_conf(cycle->conf_ctx, ngx_kqueue_module);
113
114 if (ngx_kqueue == -1) {
115 ngx_kqueue = kqueue();
116
117 if (ngx_kqueue == -1) {
118 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
119 "kqueue() failed");
120 return NGX_ERROR;
121 }
122
123 #if (NGX_THREADS)
124
125 if (!(list_mutex = ngx_mutex_init(cycle->log, 0))) {
126 return NGX_ERROR;
127 }
128
129 if (!(kevent_mutex = ngx_mutex_init(cycle->log, 0))) {
130 return NGX_ERROR;
131 }
132
133 #endif
134 }
135
136 if (max_changes < kcf->changes) {
137 if (nchanges) {
138 ts.tv_sec = 0;
139 ts.tv_nsec = 0;
140
141 if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) {
142 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
143 "kevent() failed");
144 return NGX_ERROR;
145 }
146 nchanges = 0;
147 }
148
149 if (change_list0) {
150 ngx_free(change_list0);
151 }
152
153 change_list0 = ngx_alloc(kcf->changes * sizeof(struct kevent),
154 cycle->log);
155 if (change_list0 == NULL) {
156 return NGX_ERROR;
157 }
158
159 if (change_list1) {
160 ngx_free(change_list1);
161 }
162
163 change_list1 = ngx_alloc(kcf->changes * sizeof(struct kevent),
164 cycle->log);
165 if (change_list1 == NULL) {
166 return NGX_ERROR;
167 }
168
169 change_list = change_list0;
170 }
171
172 max_changes = kcf->changes;
173
174 if (nevents < kcf->events) {
175 if (event_list) {
176 ngx_free(event_list);
177 }
178
179 event_list = ngx_alloc(kcf->events * sizeof(struct kevent), cycle->log);
180 if (event_list == NULL) {
181 return NGX_ERROR;
182 }
183 }
184
185 nevents = kcf->events;
186
187 ngx_io = ngx_os_io;
188
189 ngx_event_actions = ngx_kqueue_module_ctx.actions;
190
191 ngx_event_flags = NGX_USE_ONESHOT_EVENT
192 #if (HAVE_CLEAR_EVENT)
193 |NGX_USE_CLEAR_EVENT
194 #else
195 |NGX_USE_LEVEL_EVENT
196 #endif
197 #if (HAVE_LOWAT_EVENT)
198 |NGX_HAVE_LOWAT_EVENT
199 #endif
200 |NGX_HAVE_KQUEUE_EVENT;
201
202 return NGX_OK;
203 }
204
205
206 static void ngx_kqueue_done(ngx_cycle_t *cycle)
207 {
208 if (close(ngx_kqueue) == -1) {
209 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
210 "kqueue close() failed");
211 }
212
213 ngx_kqueue = -1;
214
215 #if (NGX_THREADS)
216 ngx_mutex_destroy(kevent_mutex);
217 ngx_mutex_destroy(list_mutex);
218 #endif
219
220 ngx_free(change_list1);
221 ngx_free(change_list0);
222 ngx_free(event_list);
223
224 change_list1 = NULL;
225 change_list0 = NULL;
226 change_list = NULL;
227 event_list = NULL;
228 max_changes = 0;
229 nchanges = 0;
230 nevents = 0;
231 }
232
233
234 static ngx_int_t ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags)
235 {
236 ngx_int_t rc;
237 ngx_event_t *e;
238 ngx_connection_t *c;
239
240 ev->active = 1;
241 ev->disabled = 0;
242 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
243
244 if (ngx_mutex_lock(list_mutex) == NGX_ERROR) {
245 return NGX_ERROR;
246 }
247
248 if (nchanges > 0
249 && ev->index < (u_int) nchanges
250 && ((uintptr_t) change_list[ev->index].udata & (uintptr_t) ~1)
251 == (uintptr_t) ev)
252 {
253 if (change_list[ev->index].flags == EV_DISABLE) {
254
255 /*
256 * if the EV_DISABLE is still not passed to a kernel
257 * we will not pass it
258 */
259
260 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
261 "kevent activated: %d: ft:%d",
262 ngx_event_ident(ev->data), event);
263
264 if (ev->index < (u_int) --nchanges) {
265 e = (ngx_event_t *) change_list[nchanges].udata;
266 change_list[ev->index] = change_list[nchanges];
267 e->index = ev->index;
268 }
269
270 ngx_mutex_unlock(list_mutex);
271
272 return NGX_OK;
273 }
274
275 c = ev->data;
276
277 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
278 "previous event on #%d were not passed in kernel", c->fd);
279
280 ngx_mutex_unlock(list_mutex);
281
282 return NGX_ERROR;
283 }
284
285 rc = ngx_kqueue_set_event(ev, event, EV_ADD|EV_ENABLE|flags);
286
287 ngx_mutex_unlock(list_mutex);
288
289 return rc;
290 }
291
292
293 static ngx_int_t ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags)
294 {
295 ngx_int_t rc;
296 ngx_event_t *e;
297
298 ev->active = 0;
299 ev->disabled = 0;
300
301 if (ngx_mutex_lock(list_mutex) == NGX_ERROR) {
302 return NGX_ERROR;
303 }
304
305 if (nchanges > 0
306 && ev->index < (u_int) nchanges
307 && ((uintptr_t) change_list[ev->index].udata & (uintptr_t) ~1)
308 == (uintptr_t) ev)
309 {
310 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
311 "kevent deleted: %d: ft:%d",
312 ngx_event_ident(ev->data), event);
313
314 /* if the event is still not passed to a kernel we will not pass it */
315
316 if (ev->index < (u_int) --nchanges) {
317 e = (ngx_event_t *) change_list[nchanges].udata;
318 change_list[ev->index] = change_list[nchanges];
319 e->index = ev->index;
320 }
321
322 ngx_mutex_unlock(list_mutex);
323
324 return NGX_OK;
325 }
326
327 /*
328 * when the file descriptor is closed the kqueue automatically deletes
329 * its filters so we do not need to delete explicity the event
330 * before the closing the file descriptor.
331 */
332
333 if (flags & NGX_CLOSE_EVENT) {
334 ngx_mutex_unlock(list_mutex);
335 return NGX_OK;
336 }
337
338 if (flags & NGX_DISABLE_EVENT) {
339 ev->disabled = 1;
340 }
341
342 rc = ngx_kqueue_set_event(ev, event,
343 flags & NGX_DISABLE_EVENT ? EV_DISABLE : EV_DELETE);
344
345 ngx_mutex_unlock(list_mutex);
346
347 return rc;
348 }
349
350
351 static ngx_int_t ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags)
352 {
353 struct kevent *kev;
354 struct timespec ts;
355 ngx_connection_t *c;
356
357 c = ev->data;
358
359 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
360 "kevent set event: %d: ft:%d fl:%04X",
361 c->fd, filter, flags);
362
363 if (nchanges >= max_changes) {
364 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
365 "kqueue change list is filled up");
366
367 ts.tv_sec = 0;
368 ts.tv_nsec = 0;
369
370 if (kevent(ngx_kqueue, change_list, nchanges, NULL, 0, &ts) == -1) {
371 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent() failed");
372 return NGX_ERROR;
373 }
374
375 nchanges = 0;
376 }
377
378 kev = &change_list[nchanges];
379
380 kev->ident = c->fd;
381 kev->filter = filter;
382 kev->flags = flags;
383 kev->udata = (void *) ((uintptr_t) ev | ev->instance);
384
385 if (filter == EVFILT_VNODE) {
386 kev->fflags = NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND
387 |NOTE_ATTRIB|NOTE_RENAME
388 #if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \
389 || __FreeBSD_version >= 500018
390 |NOTE_REVOKE
391 #endif
392 ;
393 kev->data = 0;
394
395 } else {
396 #if (HAVE_LOWAT_EVENT)
397 if (flags & NGX_LOWAT_EVENT) {
398 kev->fflags = NOTE_LOWAT;
399 kev->data = ev->available;
400
401 } else {
402 kev->fflags = 0;
403 kev->data = 0;
404 }
405 #else
406 kev->fflags = 0;
407 kev->data = 0;
408 #endif
409 }
410
411 ev->index = nchanges;
412 nchanges++;
413
414 return NGX_OK;
415 }
416
417
418 static ngx_int_t ngx_kqueue_process_events(ngx_cycle_t *cycle)
419 {
420 int events, n;
421 ngx_int_t i, instance;
422 ngx_uint_t lock, accept_lock, expire;
423 ngx_err_t err;
424 ngx_msec_t timer;
425 ngx_event_t *ev;
426 ngx_epoch_msec_t delta;
427 struct timeval tv;
428 struct timespec ts, *tp;
429
430 for ( ;; ) {
431 timer = ngx_event_find_timer();
432
433 #if (NGX_THREADS)
434
435 if (timer == NGX_TIMER_ERROR) {
436 return NGX_ERROR;
437 }
438
439 if (timer == NGX_TIMER_INFINITE || timer > 500) {
440 timer = 500;
441 break;
442 }
443
444 #endif
445
446 if (timer != 0) {
447 break;
448 }
449
450 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
451 "kevent expired timer");
452
453 ngx_event_expire_timers((ngx_msec_t)
454 (ngx_elapsed_msec - ngx_old_elapsed_msec));
455
456 if (ngx_posted_events && ngx_threaded) {
457 ngx_wakeup_worker_thread(cycle);
458 }
459 }
460
461 ngx_old_elapsed_msec = ngx_elapsed_msec;
462 expire = 1;
463 accept_lock = 0;
464
465 if (ngx_accept_mutex) {
466 if (ngx_accept_disabled > 0) {
467 ngx_accept_disabled--;
468
469 } else {
470 if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) {
471 return NGX_ERROR;
472 }
473
474 if (ngx_accept_mutex_held) {
475 accept_lock = 1;
476
477 } else if (timer == NGX_TIMER_INFINITE
478 || timer > ngx_accept_mutex_delay)
479 {
480 timer = ngx_accept_mutex_delay;
481 expire = 0;
482 }
483 }
484 }
485
486 if (ngx_threaded) {
487 if (ngx_kqueue_process_changes(cycle, 0) == NGX_ERROR) {
488 ngx_accept_mutex_unlock();
489 return NGX_ERROR;
490 }
491
492 n = 0;
493
494 } else {
495 n = nchanges;
496 nchanges = 0;
497 }
498
499 if (timer == NGX_TIMER_INFINITE) {
500 tp = NULL;
501 expire = 0;
502
503 } else {
504 ts.tv_sec = timer / 1000;
505 ts.tv_nsec = (timer % 1000) * 1000000;
506 tp = &ts;
507 }
508
509 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
510 "kevent timer: %d, changes: %d", timer, n);
511
512 events = kevent(ngx_kqueue, change_list, n, event_list, nevents, tp);
513
514 if (events == -1) {
515 err = ngx_errno;
516 } else {
517 err = 0;
518 }
519
520 ngx_gettimeofday(&tv);
521 ngx_time_update(tv.tv_sec);
522
523 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
524 "kevent events: %d", events);
525
526 delta = ngx_elapsed_msec;
527 ngx_elapsed_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000
528 + tv.tv_usec / 1000 - ngx_start_msec;
529
530 if (err) {
531 ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
532 cycle->log, err, "kevent() failed");
533 ngx_accept_mutex_unlock();
534 return NGX_ERROR;
535 }
536
537 if (timer != NGX_TIMER_INFINITE) {
538 delta = ngx_elapsed_msec - delta;
539
540 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
541 "kevent timer: %d, delta: %d", timer, (int) delta);
542
543 } else {
544 if (events == 0) {
545 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
546 "kevent() returned no events without timeout");
547 ngx_accept_mutex_unlock();
548 return NGX_ERROR;
549 }
550 }
551
552 if (events > 0) {
553 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
554 ngx_accept_mutex_unlock();
555 return NGX_ERROR;
556 }
557
558 lock = 1;
559
560 } else {
561 lock =0;
562 }
563
564 for (i = 0; i < events; i++) {
565
566 ngx_kqueue_dump_event(cycle->log, &event_list[i]);
567
568 if (event_list[i].flags & EV_ERROR) {
569 ngx_log_error(NGX_LOG_ALERT, cycle->log, event_list[i].data,
570 "kevent() error on %d", event_list[i].ident);
571 continue;
572 }
573
574 ev = (ngx_event_t *) event_list[i].udata;
575
576 switch (event_list[i].filter) {
577
578 case EVFILT_READ:
579 case EVFILT_WRITE:
580
581 instance = (uintptr_t) ev & 1;
582 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
583
584 if (ev->closed || ev->instance != instance) {
585
586 /*
587 * the stale event from a file descriptor
588 * that was just closed in this iteration
589 */
590
591 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
592 "kevent: stale event " PTR_FMT, ev);
593 continue;
594 }
595
596 if (ev->log && (ev->log->log_level & NGX_LOG_DEBUG_CONNECTION)) {
597 ngx_kqueue_dump_event(ev->log, &event_list[i]);
598 }
599
600 #if (NGX_THREADS)
601
602 if (ngx_threaded && !ev->accept) {
603 ev->posted_ready = 1;
604 ev->posted_available = event_list[i].data;
605
606 if (event_list[i].flags & EV_EOF) {
607 ev->posted_eof = 1;
608 ev->posted_errno = event_list[i].fflags;
609 }
610
611 ngx_post_event(ev);
612
613 continue;
614 }
615
616 #endif
617
618 ev->available = event_list[i].data;
619
620 if (event_list[i].flags & EV_EOF) {
621 ev->pending_eof = 1;
622 ev->kq_errno = event_list[i].fflags;
623 }
624
625 ev->ready = 1;
626
627 break;
628
629 case EVFILT_VNODE:
630 ev->kq_vnode = 1;
631
632 break;
633
634 case EVFILT_AIO:
635 ev->complete = 1;
636 ev->ready = 1;
637
638 break;
639
640 default:
641 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
642 "unexpected kevent() filter %d",
643 event_list[i].filter);
644 continue;
645 }
646
647 if (!ngx_threaded && !ngx_accept_mutex_held) {
648 ev->event_handler(ev);
649 continue;
650 }
651
652 if (!ev->accept) {
653 ngx_post_event(ev);
654 continue;
655 }
656
657 if (ngx_accept_disabled > 0) {
658 continue;
659 }
660
661 ngx_mutex_unlock(ngx_posted_events_mutex);
662
663 ev->event_handler(ev);
664
665 if (ngx_accept_disabled > 0) {
666 ngx_accept_mutex_unlock();
667 accept_lock = 0;
668 }
669
670 if (i + 1 == events) {
671 lock = 0;
672 break;
673 }
674
675 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
676 if (accept_lock) {
677 ngx_accept_mutex_unlock();
678 }
679 return NGX_ERROR;
680 }
681 }
682
683 if (accept_lock) {
684 ngx_accept_mutex_unlock();
685 }
686
687 if (lock) {
688 ngx_mutex_unlock(ngx_posted_events_mutex);
689 }
690
691 if (expire && delta) {
692 ngx_event_expire_timers((ngx_msec_t) delta);
693 }
694
695 if (ngx_posted_events) {
696 if (ngx_threaded) {
697 ngx_wakeup_worker_thread(cycle);
698
699 } else {
700 ngx_event_process_posted(cycle);
701 }
702 }
703
704 return NGX_OK;
705 }
706
707
708 static ngx_int_t ngx_kqueue_process_changes(ngx_cycle_t *cycle, ngx_uint_t try)
709 {
710 int n;
711 ngx_int_t rc;
712 ngx_err_t err;
713 struct timespec ts;
714 struct kevent *changes;
715
716 if (ngx_mutex_lock(kevent_mutex) == NGX_ERROR) {
717 return NGX_ERROR;
718 }
719
720 if (ngx_mutex_lock(list_mutex) == NGX_ERROR) {
721 ngx_mutex_unlock(kevent_mutex);
722 return NGX_ERROR;
723 }
724
725 if (nchanges == 0) {
726 ngx_mutex_unlock(list_mutex);
727 ngx_mutex_unlock(kevent_mutex);
728 return NGX_OK;
729 }
730
731 changes = change_list;
732 if (change_list == change_list0) {
733 change_list = change_list1;
734 } else {
735 change_list = change_list0;
736 }
737
738 n = nchanges;
739 nchanges = 0;
740
741 ngx_mutex_unlock(list_mutex);
742
743 ts.tv_sec = 0;
744 ts.tv_nsec = 0;
745
746 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
747 "kevent changes: %d", n);
748
749 if (kevent(ngx_kqueue, changes, n, NULL, 0, &ts) == -1) {
750 err = ngx_errno;
751 ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
752 cycle->log, err, "kevent() failed");
753 rc = NGX_ERROR;
754
755 } else {
756 rc = NGX_OK;
757 }
758
759 ngx_mutex_unlock(kevent_mutex);
760
761 return rc;
762 }
763
764
765 static ngx_inline void ngx_kqueue_dump_event(ngx_log_t *log, struct kevent *kev)
766 {
767 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, log, 0,
768 (kev->ident > 0x8000000 && kev->ident != (unsigned) -1) ?
769 "kevent: " PTR_FMT ": ft:%d fl:%04X ff:%08X d:%d ud:"
770 PTR_FMT:
771 "kevent: %d: ft:%d fl:%04X ff:%08X d:%d ud:" PTR_FMT,
772 kev->ident, kev->filter,
773 kev->flags, kev->fflags,
774 kev->data, kev->udata);
775 }
776
777
778 static void *ngx_kqueue_create_conf(ngx_cycle_t *cycle)
779 {
780 ngx_kqueue_conf_t *kcf;
781
782 ngx_test_null(kcf, ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t)),
783 NGX_CONF_ERROR);
784
785 kcf->changes = NGX_CONF_UNSET;
786 kcf->events = NGX_CONF_UNSET;
787
788 return kcf;
789 }
790
791
792 static char *ngx_kqueue_init_conf(ngx_cycle_t *cycle, void *conf)
793 {
794 ngx_kqueue_conf_t *kcf = conf;
795
796 ngx_conf_init_value(kcf->changes, 512);
797 ngx_conf_init_value(kcf->events, 512);
798
799 return NGX_CONF_OK;
800 }