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nginx 0.7.4
[nginx-catap.git] / src / event / ngx_event.c
blob9379aa30c0406b2da9986294a840584483ce6127
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 #define DEFAULT_CONNECTIONS 512
13
14
15 extern ngx_module_t ngx_kqueue_module;
16 extern ngx_module_t ngx_eventport_module;
17 extern ngx_module_t ngx_devpoll_module;
18 extern ngx_module_t ngx_epoll_module;
19 extern ngx_module_t ngx_rtsig_module;
20 extern ngx_module_t ngx_select_module;
21
22
23 static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle);
24 static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle);
25 static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
26
27 static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd,
28 void *conf);
29 static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
30 static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd,
31 void *conf);
32
33 static void *ngx_event_create_conf(ngx_cycle_t *cycle);
34 static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf);
35
36
37 static ngx_uint_t ngx_timer_resolution;
38 sig_atomic_t ngx_event_timer_alarm;
39
40 static ngx_uint_t ngx_event_max_module;
41
42 ngx_uint_t ngx_event_flags;
43 ngx_event_actions_t ngx_event_actions;
44
45
46 ngx_atomic_t connection_counter = 1;
47 ngx_atomic_t *ngx_connection_counter = &connection_counter;
48
49
50 ngx_atomic_t *ngx_accept_mutex_ptr;
51 ngx_shmtx_t ngx_accept_mutex;
52 ngx_uint_t ngx_use_accept_mutex;
53 ngx_uint_t ngx_accept_events;
54 ngx_uint_t ngx_accept_mutex_held;
55 ngx_msec_t ngx_accept_mutex_delay;
56 ngx_int_t ngx_accept_disabled;
57 ngx_file_t ngx_accept_mutex_lock_file;
58
59
60 #if (NGX_STAT_STUB)
61
62 ngx_atomic_t ngx_stat_accepted0;
63 ngx_atomic_t *ngx_stat_accepted = &ngx_stat_accepted0;
64 ngx_atomic_t ngx_stat_handled0;
65 ngx_atomic_t *ngx_stat_handled = &ngx_stat_handled0;
66 ngx_atomic_t ngx_stat_requests0;
67 ngx_atomic_t *ngx_stat_requests = &ngx_stat_requests0;
68 ngx_atomic_t ngx_stat_active0;
69 ngx_atomic_t *ngx_stat_active = &ngx_stat_active0;
70 ngx_atomic_t ngx_stat_reading0;
71 ngx_atomic_t *ngx_stat_reading = &ngx_stat_reading0;
72 ngx_atomic_t ngx_stat_writing0;
73 ngx_atomic_t *ngx_stat_writing = &ngx_stat_writing0;
74
75 #endif
76
77
78
79 static ngx_command_t ngx_events_commands[] = {
80
81 { ngx_string("events"),
82 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
83 ngx_events_block,
84 0,
85 0,
86 NULL },
87
88 ngx_null_command
89 };
90
91
92 static ngx_core_module_t ngx_events_module_ctx = {
93 ngx_string("events"),
94 NULL,
95 NULL
96 };
97
98
99 ngx_module_t ngx_events_module = {
100 NGX_MODULE_V1,
101 &ngx_events_module_ctx, /* module context */
102 ngx_events_commands, /* module directives */
103 NGX_CORE_MODULE, /* module type */
104 NULL, /* init master */
105 NULL, /* init module */
106 NULL, /* init process */
107 NULL, /* init thread */
108 NULL, /* exit thread */
109 NULL, /* exit process */
110 NULL, /* exit master */
111 NGX_MODULE_V1_PADDING
112 };
113
114
115 static ngx_str_t event_core_name = ngx_string("event_core");
116
117
118 static ngx_command_t ngx_event_core_commands[] = {
119
120 { ngx_string("worker_connections"),
121 NGX_EVENT_CONF|NGX_CONF_TAKE1,
122 ngx_event_connections,
123 0,
124 0,
125 NULL },
126
127 { ngx_string("connections"),
128 NGX_EVENT_CONF|NGX_CONF_TAKE1,
129 ngx_event_connections,
130 0,
131 0,
132 NULL },
133
134 { ngx_string("use"),
135 NGX_EVENT_CONF|NGX_CONF_TAKE1,
136 ngx_event_use,
137 0,
138 0,
139 NULL },
140
141 { ngx_string("multi_accept"),
142 NGX_EVENT_CONF|NGX_CONF_FLAG,
143 ngx_conf_set_flag_slot,
144 0,
145 offsetof(ngx_event_conf_t, multi_accept),
146 NULL },
147
148 { ngx_string("accept_mutex"),
149 NGX_EVENT_CONF|NGX_CONF_FLAG,
150 ngx_conf_set_flag_slot,
151 0,
152 offsetof(ngx_event_conf_t, accept_mutex),
153 NULL },
154
155 { ngx_string("accept_mutex_delay"),
156 NGX_EVENT_CONF|NGX_CONF_TAKE1,
157 ngx_conf_set_msec_slot,
158 0,
159 offsetof(ngx_event_conf_t, accept_mutex_delay),
160 NULL },
161
162 { ngx_string("debug_connection"),
163 NGX_EVENT_CONF|NGX_CONF_TAKE1,
164 ngx_event_debug_connection,
165 0,
166 0,
167 NULL },
168
169 ngx_null_command
170 };
171
172
173 ngx_event_module_t ngx_event_core_module_ctx = {
174 &event_core_name,
175 ngx_event_create_conf, /* create configuration */
176 ngx_event_init_conf, /* init configuration */
177
178 { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
179 };
180
181
182 ngx_module_t ngx_event_core_module = {
183 NGX_MODULE_V1,
184 &ngx_event_core_module_ctx, /* module context */
185 ngx_event_core_commands, /* module directives */
186 NGX_EVENT_MODULE, /* module type */
187 NULL, /* init master */
188 ngx_event_module_init, /* init module */
189 ngx_event_process_init, /* init process */
190 NULL, /* init thread */
191 NULL, /* exit thread */
192 NULL, /* exit process */
193 NULL, /* exit master */
194 NGX_MODULE_V1_PADDING
195 };
196
197
198 void
199 ngx_process_events_and_timers(ngx_cycle_t *cycle)
200 {
201 ngx_uint_t flags;
202 ngx_msec_t timer, delta;
203
204 if (ngx_timer_resolution) {
205 timer = NGX_TIMER_INFINITE;
206 flags = 0;
207
208 } else {
209 timer = ngx_event_find_timer();
210 flags = NGX_UPDATE_TIME;
211
212 #if (NGX_THREADS)
213
214 if (timer == NGX_TIMER_INFINITE || timer > 500) {
215 timer = 500;
216 }
217
218 #endif
219 }
220
221 if (ngx_use_accept_mutex) {
222 if (ngx_accept_disabled > 0) {
223 ngx_accept_disabled--;
224
225 } else {
226 if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) {
227 return;
228 }
229
230 if (ngx_accept_mutex_held) {
231 flags |= NGX_POST_EVENTS;
232
233 } else {
234 if (timer == NGX_TIMER_INFINITE
235 || timer > ngx_accept_mutex_delay)
236 {
237 timer = ngx_accept_mutex_delay;
238 }
239 }
240 }
241 }
242
243 delta = ngx_current_msec;
244
245 (void) ngx_process_events(cycle, timer, flags);
246
247 delta = ngx_current_msec - delta;
248
249 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
250 "timer delta: %M", delta);
251
252 if (ngx_posted_accept_events) {
253 ngx_event_process_posted(cycle, &ngx_posted_accept_events);
254 }
255
256 if (ngx_accept_mutex_held) {
257 ngx_shmtx_unlock(&ngx_accept_mutex);
258 }
259
260 if (delta) {
261 ngx_event_expire_timers();
262 }
263
264 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
265 "posted events %p", ngx_posted_events);
266
267 if (ngx_posted_events) {
268 if (ngx_threaded) {
269 ngx_wakeup_worker_thread(cycle);
270
271 } else {
272 ngx_event_process_posted(cycle, &ngx_posted_events);
273 }
274 }
275 }
276
277
278 ngx_int_t
279 ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags)
280 {
281 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
282
283 /* kqueue, epoll */
284
285 if (!rev->active && !rev->ready) {
286 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT)
287 == NGX_ERROR)
288 {
289 return NGX_ERROR;
290 }
291 }
292
293 return NGX_OK;
294
295 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
296
297 /* select, poll, /dev/poll */
298
299 if (!rev->active && !rev->ready) {
300 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT)
301 == NGX_ERROR)
302 {
303 return NGX_ERROR;
304 }
305
306 return NGX_OK;
307 }
308
309 if (rev->active && (rev->ready || (flags & NGX_CLOSE_EVENT))) {
310 if (ngx_del_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT | flags)
311 == NGX_ERROR)
312 {
313 return NGX_ERROR;
314 }
315
316 return NGX_OK;
317 }
318
319 } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) {
320
321 /* event ports */
322
323 if (!rev->active && !rev->ready) {
324 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
325 return NGX_ERROR;
326 }
327
328 return NGX_OK;
329 }
330
331 if (rev->oneshot && !rev->ready) {
332 if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
333 return NGX_ERROR;
334 }
335
336 return NGX_OK;
337 }
338 }
339
340 /* aio, iocp, rtsig */
341
342 return NGX_OK;
343 }
344
345
346 ngx_int_t
347 ngx_handle_write_event(ngx_event_t *wev, size_t lowat)
348 {
349 ngx_connection_t *c;
350
351 if (lowat) {
352 c = wev->data;
353
354 if (ngx_send_lowat(c, lowat) == NGX_ERROR) {
355 return NGX_ERROR;
356 }
357 }
358
359 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
360
361 /* kqueue, epoll */
362
363 if (!wev->active && !wev->ready) {
364 if (ngx_add_event(wev, NGX_WRITE_EVENT,
365 NGX_CLEAR_EVENT | (lowat ? NGX_LOWAT_EVENT : 0))
366 == NGX_ERROR)
367 {
368 return NGX_ERROR;
369 }
370 }
371
372 return NGX_OK;
373
374 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
375
376 /* select, poll, /dev/poll */
377
378 if (!wev->active && !wev->ready) {
379 if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
380 == NGX_ERROR)
381 {
382 return NGX_ERROR;
383 }
384
385 return NGX_OK;
386 }
387
388 if (wev->active && wev->ready) {
389 if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
390 == NGX_ERROR)
391 {
392 return NGX_ERROR;
393 }
394
395 return NGX_OK;
396 }
397
398 } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) {
399
400 /* event ports */
401
402 if (!wev->active && !wev->ready) {
403 if (ngx_add_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
404 return NGX_ERROR;
405 }
406
407 return NGX_OK;
408 }
409
410 if (wev->oneshot && wev->ready) {
411 if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
412 return NGX_ERROR;
413 }
414
415 return NGX_OK;
416 }
417 }
418
419 /* aio, iocp, rtsig */
420
421 return NGX_OK;
422 }
423
424
425 static ngx_int_t
426 ngx_event_module_init(ngx_cycle_t *cycle)
427 {
428 void ***cf;
429 u_char *shared;
430 size_t size, cl;
431 ngx_shm_t shm;
432 ngx_core_conf_t *ccf;
433 ngx_event_conf_t *ecf;
434
435 cf = ngx_get_conf(cycle->conf_ctx, ngx_events_module);
436
437 if (cf == NULL) {
438 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
439 "no \"events\" section in configuration");
440 return NGX_ERROR;
441 }
442
443 ecf = (*cf)[ngx_event_core_module.ctx_index];
444
445 if (!ngx_test_config) {
446 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
447 "using the \"%s\" event method", ecf->name);
448 }
449
450 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
451
452 ngx_timer_resolution = ccf->timer_resolution;
453
454 #if !(NGX_WIN32)
455 {
456 ngx_int_t limit;
457 struct rlimit rlmt;
458
459 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
460 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
461 "getrlimit(RLIMIT_NOFILE) failed, ignored");
462
463 } else {
464 if (ecf->connections > (ngx_uint_t) rlmt.rlim_cur
465 && (ccf->rlimit_nofile == NGX_CONF_UNSET
466 || ecf->connections > (ngx_uint_t) ccf->rlimit_nofile))
467 {
468 limit = (ccf->rlimit_nofile == NGX_CONF_UNSET) ?
469 (ngx_int_t) rlmt.rlim_cur : ccf->rlimit_nofile;
470
471 ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
472 "%ui worker_connections are more than "
473 "open file resource limit: %i",
474 ecf->connections, limit);
475 }
476 }
477 }
478 #endif /* !(NGX_WIN32) */
479
480
481 if (ccf->master == 0) {
482 return NGX_OK;
483 }
484
485 if (ngx_accept_mutex_ptr) {
486 return NGX_OK;
487 }
488
489
490 /* cl should be equal or bigger than cache line size */
491
492 cl = 128;
493
494 size = cl /* ngx_accept_mutex */
495 + cl; /* ngx_connection_counter */
496
497 #if (NGX_STAT_STUB)
498
499 size += cl /* ngx_stat_accepted */
500 + cl /* ngx_stat_handled */
501 + cl /* ngx_stat_requests */
502 + cl /* ngx_stat_active */
503 + cl /* ngx_stat_reading */
504 + cl; /* ngx_stat_writing */
505
506 #endif
507
508 shm.size = size;
509 shm.log = cycle->log;
510
511 if (ngx_shm_alloc(&shm) != NGX_OK) {
512 return NGX_ERROR;
513 }
514
515 shared = shm.addr;
516
517 ngx_accept_mutex_ptr = (ngx_atomic_t *) shared;
518
519 if (ngx_shmtx_create(&ngx_accept_mutex, shared, cycle->lock_file.data)
520 != NGX_OK)
521 {
522 return NGX_ERROR;
523 }
524
525 ngx_connection_counter = (ngx_atomic_t *) (shared + 1 * cl);
526
527 #if (NGX_STAT_STUB)
528
529 ngx_stat_accepted = (ngx_atomic_t *) (shared + 2 * cl);
530 ngx_stat_handled = (ngx_atomic_t *) (shared + 3 * cl);
531 ngx_stat_requests = (ngx_atomic_t *) (shared + 4 * cl);
532 ngx_stat_active = (ngx_atomic_t *) (shared + 5 * cl);
533 ngx_stat_reading = (ngx_atomic_t *) (shared + 6 * cl);
534 ngx_stat_writing = (ngx_atomic_t *) (shared + 7 * cl);
535
536 #endif
537
538 *ngx_connection_counter = 1;
539
540 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
541 "counter: %p, %d",
542 ngx_connection_counter, *ngx_connection_counter);
543
544 return NGX_OK;
545 }
546
547
548 #if !(NGX_WIN32)
549
550 void
551 ngx_timer_signal_handler(int signo)
552 {
553 ngx_event_timer_alarm = 1;
554
555 ngx_time_update(0, 0);
556
557 #if 1
558 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal");
559 #endif
560 }
561
562 #endif
563
564
565 static ngx_int_t
566 ngx_event_process_init(ngx_cycle_t *cycle)
567 {
568 ngx_uint_t m, i;
569 ngx_event_t *rev, *wev;
570 ngx_listening_t *ls;
571 ngx_connection_t *c, *next, *old;
572 ngx_core_conf_t *ccf;
573 ngx_event_conf_t *ecf;
574 ngx_event_module_t *module;
575
576 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
577 ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
578
579 if (ccf->master && ccf->worker_processes > 1 && ecf->accept_mutex) {
580 ngx_use_accept_mutex = 1;
581 ngx_accept_mutex_held = 0;
582 ngx_accept_mutex_delay = ecf->accept_mutex_delay;
583
584 } else {
585 ngx_use_accept_mutex = 0;
586 }
587
588 #if (NGX_THREADS)
589 ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0);
590 if (ngx_posted_events_mutex == NULL) {
591 return NGX_ERROR;
592 }
593 #endif
594
595 if (ngx_event_timer_init(cycle->log) == NGX_ERROR) {
596 return NGX_ERROR;
597 }
598
599 for (m = 0; ngx_modules[m]; m++) {
600 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
601 continue;
602 }
603
604 if (ngx_modules[m]->ctx_index != ecf->use) {
605 continue;
606 }
607
608 module = ngx_modules[m]->ctx;
609
610 if (module->actions.init(cycle, ngx_timer_resolution) != NGX_OK) {
611 /* fatal */
612 exit(2);
613 }
614
615 break;
616 }
617
618 #if !(NGX_WIN32)
619
620 if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) {
621 struct sigaction sa;
622 struct itimerval itv;
623
624 ngx_memzero(&sa, sizeof(struct sigaction));
625 sa.sa_handler = ngx_timer_signal_handler;
626 sigemptyset(&sa.sa_mask);
627
628 if (sigaction(SIGALRM, &sa, NULL) == -1) {
629 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
630 "sigaction(SIGALRM) failed");
631 return NGX_ERROR;
632 }
633
634 itv.it_interval.tv_sec = ngx_timer_resolution / 1000;
635 itv.it_interval.tv_usec = (ngx_timer_resolution % 1000) * 1000;
636 itv.it_value.tv_sec = ngx_timer_resolution / 1000;
637 itv.it_value.tv_usec = (ngx_timer_resolution % 1000 ) * 1000;
638
639 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
640 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
641 "setitimer() failed");
642 }
643 }
644
645 if (ngx_event_flags & NGX_USE_FD_EVENT) {
646 struct rlimit rlmt;
647
648 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
649 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
650 "getrlimit(RLIMIT_NOFILE) failed");
651 return NGX_ERROR;
652 }
653
654 cycle->files_n = (ngx_uint_t) rlmt.rlim_cur;
655
656 cycle->files = ngx_calloc(sizeof(ngx_connection_t *) * cycle->files_n,
657 cycle->log);
658 if (cycle->files == NULL) {
659 return NGX_ERROR;
660 }
661 }
662
663 #endif
664
665 cycle->connections =
666 ngx_alloc(sizeof(ngx_connection_t) * cycle->connection_n, cycle->log);
667 if (cycle->connections == NULL) {
668 return NGX_ERROR;
669 }
670
671 c = cycle->connections;
672
673 cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * cycle->connection_n,
674 cycle->log);
675 if (cycle->read_events == NULL) {
676 return NGX_ERROR;
677 }
678
679 rev = cycle->read_events;
680 for (i = 0; i < cycle->connection_n; i++) {
681 rev[i].closed = 1;
682 rev[i].instance = 1;
683 #if (NGX_THREADS)
684 rev[i].lock = &c[i].lock;
685 rev[i].own_lock = &c[i].lock;
686 #endif
687 }
688
689 cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * cycle->connection_n,
690 cycle->log);
691 if (cycle->write_events == NULL) {
692 return NGX_ERROR;
693 }
694
695 wev = cycle->write_events;
696 for (i = 0; i < cycle->connection_n; i++) {
697 wev[i].closed = 1;
698 #if (NGX_THREADS)
699 wev[i].lock = &c[i].lock;
700 wev[i].own_lock = &c[i].lock;
701 #endif
702 }
703
704 i = cycle->connection_n;
705 next = NULL;
706
707 do {
708 i--;
709
710 c[i].data = next;
711 c[i].read = &cycle->read_events[i];
712 c[i].write = &cycle->write_events[i];
713 c[i].fd = (ngx_socket_t) -1;
714
715 next = &c[i];
716
717 #if (NGX_THREADS)
718 c[i].lock = 0;
719 #endif
720 } while (i);
721
722 cycle->free_connections = next;
723 cycle->free_connection_n = cycle->connection_n;
724
725 /* for each listening socket */
726
727 ls = cycle->listening.elts;
728 for (i = 0; i < cycle->listening.nelts; i++) {
729
730 c = ngx_get_connection(ls[i].fd, cycle->log);
731
732 if (c == NULL) {
733 return NGX_ERROR;
734 }
735
736 c->log = &ls[i].log;
737
738 c->listening = &ls[i];
739 ls[i].connection = c;
740
741 rev = c->read;
742
743 rev->log = c->log;
744 rev->accept = 1;
745
746 #if (NGX_HAVE_DEFERRED_ACCEPT)
747 rev->deferred_accept = ls[i].deferred_accept;
748 #endif
749
750 if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) {
751 if (ls[i].previous) {
752
753 /*
754 * delete the old accept events that were bound to
755 * the old cycle read events array
756 */
757
758 old = ls[i].previous->connection;
759
760 if (ngx_del_event(old->read, NGX_READ_EVENT, NGX_CLOSE_EVENT)
761 == NGX_ERROR)
762 {
763 return NGX_ERROR;
764 }
765
766 old->fd = (ngx_socket_t) -1;
767 }
768 }
769
770 #if (NGX_WIN32)
771
772 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
773 ngx_iocp_conf_t *iocpcf;
774
775 rev->handler = ngx_event_acceptex;
776
777 if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) {
778 return NGX_ERROR;
779 }
780
781 ls[i].log.handler = ngx_acceptex_log_error;
782
783 iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module);
784 if (ngx_event_post_acceptex(&ls[i], iocpcf->post_acceptex)
785 == NGX_ERROR)
786 {
787 return NGX_ERROR;
788 }
789
790 } else {
791 rev->handler = ngx_event_accept;
792
793 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
794 return NGX_ERROR;
795 }
796 }
797
798 #else
799
800 rev->handler = ngx_event_accept;
801
802 if (ngx_use_accept_mutex) {
803 continue;
804 }
805
806 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
807 if (ngx_add_conn(c) == NGX_ERROR) {
808 return NGX_ERROR;
809 }
810
811 } else {
812 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
813 return NGX_ERROR;
814 }
815 }
816
817 #endif
818
819 }
820
821 return NGX_OK;
822 }
823
824
825 ngx_int_t
826 ngx_send_lowat(ngx_connection_t *c, size_t lowat)
827 {
828 int sndlowat;
829
830 #if (NGX_HAVE_LOWAT_EVENT)
831
832 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
833 c->write->available = lowat;
834 return NGX_OK;
835 }
836
837 #endif
838
839 if (lowat == 0 || c->sndlowat) {
840 return NGX_OK;
841 }
842
843 sndlowat = (int) lowat;
844
845 if (setsockopt(c->fd, SOL_SOCKET, SO_SNDLOWAT,
846 (const void *) &sndlowat, sizeof(int))
847 == -1)
848 {
849 ngx_connection_error(c, ngx_socket_errno,
850 "setsockopt(SO_SNDLOWAT) failed");
851 return NGX_ERROR;
852 }
853
854 c->sndlowat = 1;
855
856 return NGX_OK;
857 }
858
859
860 static char *
861 ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
862 {
863 char *rv;
864 void ***ctx;
865 ngx_uint_t i;
866 ngx_conf_t pcf;
867 ngx_event_module_t *m;
868
869 /* count the number of the event modules and set up their indices */
870
871 ngx_event_max_module = 0;
872 for (i = 0; ngx_modules[i]; i++) {
873 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
874 continue;
875 }
876
877 ngx_modules[i]->ctx_index = ngx_event_max_module++;
878 }
879
880 ctx = ngx_pcalloc(cf->pool, sizeof(void *));
881 if (ctx == NULL) {
882 return NGX_CONF_ERROR;
883 }
884
885 *ctx = ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *));
886 if (*ctx == NULL) {
887 return NGX_CONF_ERROR;
888 }
889
890 *(void **) conf = ctx;
891
892 for (i = 0; ngx_modules[i]; i++) {
893 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
894 continue;
895 }
896
897 m = ngx_modules[i]->ctx;
898
899 if (m->create_conf) {
900 (*ctx)[ngx_modules[i]->ctx_index] = m->create_conf(cf->cycle);
901 if ((*ctx)[ngx_modules[i]->ctx_index] == NULL) {
902 return NGX_CONF_ERROR;
903 }
904 }
905 }
906
907 pcf = *cf;
908 cf->ctx = ctx;
909 cf->module_type = NGX_EVENT_MODULE;
910 cf->cmd_type = NGX_EVENT_CONF;
911
912 rv = ngx_conf_parse(cf, NULL);
913
914 *cf = pcf;
915
916 if (rv != NGX_CONF_OK)
917 return rv;
918
919 for (i = 0; ngx_modules[i]; i++) {
920 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
921 continue;
922 }
923
924 m = ngx_modules[i]->ctx;
925
926 if (m->init_conf) {
927 rv = m->init_conf(cf->cycle, (*ctx)[ngx_modules[i]->ctx_index]);
928 if (rv != NGX_CONF_OK) {
929 return rv;
930 }
931 }
932 }
933
934 return NGX_CONF_OK;
935 }
936
937
938 static char *
939 ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
940 {
941 ngx_event_conf_t *ecf = conf;
942
943 ngx_str_t *value;
944
945 if (ecf->connections != NGX_CONF_UNSET_UINT) {
946 return "is duplicate";
947 }
948
949 if (ngx_strcmp(cmd->name.data, "connections") == 0) {
950 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
951 "the \"connections\" directive is deprecated, "
952 "use the \"worker_connections\" directive instead");
953 }
954
955 value = cf->args->elts;
956 ecf->connections = ngx_atoi(value[1].data, value[1].len);
957 if (ecf->connections == (ngx_uint_t) NGX_ERROR) {
958 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
959 "invalid number \"%V\"", &value[1]);
960
961 return NGX_CONF_ERROR;
962 }
963
964 cf->cycle->connection_n = ecf->connections;
965
966 return NGX_CONF_OK;
967 }
968
969
970 static char *
971 ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
972 {
973 ngx_event_conf_t *ecf = conf;
974
975 ngx_int_t m;
976 ngx_str_t *value;
977 ngx_event_conf_t *old_ecf;
978 ngx_event_module_t *module;
979
980 if (ecf->use != NGX_CONF_UNSET_UINT) {
981 return "is duplicate";
982 }
983
984 value = cf->args->elts;
985
986 if (cf->cycle->old_cycle->conf_ctx) {
987 old_ecf = ngx_event_get_conf(cf->cycle->old_cycle->conf_ctx,
988 ngx_event_core_module);
989 } else {
990 old_ecf = NULL;
991 }
992
993
994 for (m = 0; ngx_modules[m]; m++) {
995 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
996 continue;
997 }
998
999 module = ngx_modules[m]->ctx;
1000 if (module->name->len == value[1].len) {
1001 if (ngx_strcmp(module->name->data, value[1].data) == 0) {
1002 ecf->use = ngx_modules[m]->ctx_index;
1003 ecf->name = module->name->data;
1004
1005 if (ngx_process == NGX_PROCESS_SINGLE
1006 && old_ecf
1007 && old_ecf->use != ecf->use)
1008 {
1009 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1010 "when the server runs without a master process "
1011 "the \"%V\" event type must be the same as "
1012 "in previous configuration - \"%s\" "
1013 "and it can not be changed on the fly, "
1014 "to change it you need to stop server "
1015 "and start it again",
1016 &value[1], old_ecf->name);
1017
1018 return NGX_CONF_ERROR;
1019 }
1020
1021 return NGX_CONF_OK;
1022 }
1023 }
1024 }
1025
1026 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1027 "invalid event type \"%V\"", &value[1]);
1028
1029 return NGX_CONF_ERROR;
1030 }
1031
1032
1033 static char *
1034 ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1035 {
1036 #if (NGX_DEBUG)
1037 ngx_event_conf_t *ecf = conf;
1038
1039 ngx_int_t rc;
1040 ngx_str_t *value;
1041 ngx_event_debug_t *dc;
1042 struct hostent *h;
1043 ngx_inet_cidr_t in_cidr;
1044
1045 value = cf->args->elts;
1046
1047 /* AF_INET only */
1048
1049 dc = ngx_array_push(&ecf->debug_connection);
1050 if (dc == NULL) {
1051 return NGX_CONF_ERROR;
1052 }
1053
1054 dc->addr = inet_addr((char *) value[1].data);
1055
1056 if (dc->addr != INADDR_NONE) {
1057 dc->mask = 0xffffffff;
1058 return NGX_CONF_OK;
1059 }
1060
1061 rc = ngx_ptocidr(&value[1], &in_cidr);
1062
1063 if (rc == NGX_DONE) {
1064 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1065 "low address bits of %V are meaningless", &value[1]);
1066 rc = NGX_OK;
1067 }
1068
1069 if (rc == NGX_OK) {
1070 dc->mask = in_cidr.mask;
1071 dc->addr = in_cidr.addr;
1072 return NGX_CONF_OK;
1073 }
1074
1075 h = gethostbyname((char *) value[1].data);
1076
1077 if (h == NULL || h->h_addr_list[0] == NULL) {
1078 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1079 "host \"%s\" not found", value[1].data);
1080 return NGX_CONF_ERROR;
1081 }
1082
1083 dc->mask = 0xffffffff;
1084 dc->addr = *(in_addr_t *)(h->h_addr_list[0]);
1085
1086 #else
1087
1088 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1089 "\"debug_connection\" is ignored, you need to rebuild "
1090 "nginx using --with-debug option to enable it");
1091
1092 #endif
1093
1094 return NGX_CONF_OK;
1095 }
1096
1097
1098 static void *
1099 ngx_event_create_conf(ngx_cycle_t *cycle)
1100 {
1101 ngx_event_conf_t *ecf;
1102
1103 ecf = ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t));
1104 if (ecf == NULL) {
1105 return NGX_CONF_ERROR;
1106 }
1107
1108 ecf->connections = NGX_CONF_UNSET_UINT;
1109 ecf->use = NGX_CONF_UNSET_UINT;
1110 ecf->multi_accept = NGX_CONF_UNSET;
1111 ecf->accept_mutex = NGX_CONF_UNSET;
1112 ecf->accept_mutex_delay = NGX_CONF_UNSET_MSEC;
1113 ecf->name = (void *) NGX_CONF_UNSET;
1114
1115 #if (NGX_DEBUG)
1116
1117 if (ngx_array_init(&ecf->debug_connection, cycle->pool, 4,
1118 sizeof(ngx_event_debug_t)) == NGX_ERROR)
1119 {
1120 return NGX_CONF_ERROR;
1121 }
1122
1123 #endif
1124
1125 return ecf;
1126 }
1127
1128
1129 static char *
1130 ngx_event_init_conf(ngx_cycle_t *cycle, void *conf)
1131 {
1132 ngx_event_conf_t *ecf = conf;
1133
1134 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
1135 int fd;
1136 #endif
1137 #if (NGX_HAVE_RTSIG)
1138 ngx_uint_t rtsig;
1139 ngx_core_conf_t *ccf;
1140 #endif
1141 ngx_int_t i;
1142 ngx_module_t *module;
1143 ngx_event_module_t *event_module;
1144
1145 module = NULL;
1146
1147 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
1148
1149 fd = epoll_create(100);
1150
1151 if (fd != -1) {
1152 close(fd);
1153 module = &ngx_epoll_module;
1154
1155 } else if (ngx_errno != NGX_ENOSYS) {
1156 module = &ngx_epoll_module;
1157 }
1158
1159 #endif
1160
1161 #if (NGX_HAVE_RTSIG)
1162
1163 if (module == NULL) {
1164 module = &ngx_rtsig_module;
1165 rtsig = 1;
1166
1167 } else {
1168 rtsig = 0;
1169 }
1170
1171 #endif
1172
1173 #if (NGX_HAVE_DEVPOLL)
1174
1175 module = &ngx_devpoll_module;
1176
1177 #endif
1178
1179 #if (NGX_HAVE_KQUEUE)
1180
1181 module = &ngx_kqueue_module;
1182
1183 #endif
1184
1185 #if (NGX_HAVE_SELECT)
1186
1187 if (module == NULL) {
1188 module = &ngx_select_module;
1189 }
1190
1191 #endif
1192
1193 if (module == NULL) {
1194 for (i = 0; ngx_modules[i]; i++) {
1195
1196 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
1197 continue;
1198 }
1199
1200 event_module = ngx_modules[i]->ctx;
1201
1202 if (ngx_strcmp(event_module->name->data, event_core_name.data) == 0)
1203 {
1204 continue;
1205 }
1206
1207 module = ngx_modules[i];
1208 break;
1209 }
1210 }
1211
1212 if (module == NULL) {
1213 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
1214 return NGX_CONF_ERROR;
1215 }
1216
1217 ngx_conf_init_uint_value(ecf->connections, DEFAULT_CONNECTIONS);
1218 cycle->connection_n = ecf->connections;
1219
1220 ngx_conf_init_uint_value(ecf->use, module->ctx_index);
1221
1222 event_module = module->ctx;
1223 ngx_conf_init_ptr_value(ecf->name, event_module->name->data);
1224
1225 ngx_conf_init_value(ecf->multi_accept, 0);
1226 ngx_conf_init_value(ecf->accept_mutex, 1);
1227 ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);
1228
1229
1230 #if (NGX_HAVE_RTSIG)
1231
1232 if (!rtsig) {
1233 return NGX_CONF_OK;
1234 }
1235
1236 if (ecf->accept_mutex) {
1237 return NGX_CONF_OK;
1238 }
1239
1240 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
1241
1242 if (ccf->worker_processes == 0) {
1243 return NGX_CONF_OK;
1244 }
1245
1246 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
1247 "the \"rtsig\" method requires \"accept_mutex\" to be on");
1248
1249 return NGX_CONF_ERROR;
1250
1251 #else
1252
1253 return NGX_CONF_OK;
1254
1255 #endif
1256 }
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