Mercurial > hg > nginx
annotate src/event/modules/ngx_eventport_module.c @ 4572:67653855682e
Fixed spelling in multiline C comments.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Tue, 03 Apr 2012 07:37:31 +0000 |
parents | d620f497c50f |
children | 4c36e15651f7 |
rev | line source |
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719 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
719 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_event.h> | |
11 | |
12 | |
13 #if (NGX_TEST_BUILD_EVENTPORT) | |
14 | |
15 #define ushort_t u_short | |
16 #define uint_t u_int | |
17 | |
18 /* Solaris declarations */ | |
19 | |
20 #define PORT_SOURCE_AIO 1 | |
21 #define PORT_SOURCE_TIMER 2 | |
22 #define PORT_SOURCE_USER 3 | |
23 #define PORT_SOURCE_FD 4 | |
24 #define PORT_SOURCE_ALERT 5 | |
25 #define PORT_SOURCE_MQ 6 | |
26 | |
27 #define ETIME 64 | |
28 | |
29 #define SIGEV_PORT 4 | |
30 | |
31 typedef struct { | |
32 int portev_events; /* event data is source specific */ | |
33 ushort_t portev_source; /* event source */ | |
34 ushort_t portev_pad; /* port internal use */ | |
35 uintptr_t portev_object; /* source specific object */ | |
36 void *portev_user; /* user cookie */ | |
37 } port_event_t; | |
38 | |
39 typedef struct port_notify { | |
40 int portnfy_port; /* bind request(s) to port */ | |
41 void *portnfy_user; /* user defined */ | |
42 } port_notify_t; | |
43 | |
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44 #if (__FreeBSD_version < 700005) |
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45 |
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46 typedef struct itimerspec { /* definition per POSIX.4 */ |
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47 struct timespec it_interval;/* timer period */ |
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48 struct timespec it_value; /* timer expiration */ |
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49 } itimerspec_t; |
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50 |
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51 #endif |
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52 |
719 | 53 int port_create(void) |
54 { | |
55 return -1; | |
56 } | |
57 | |
58 int port_associate(int port, int source, uintptr_t object, int events, | |
59 void *user) | |
60 { | |
61 return -1; | |
62 } | |
63 | |
64 int port_dissociate(int port, int source, uintptr_t object) | |
65 { | |
66 return -1; | |
67 } | |
68 | |
69 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, | |
70 struct timespec *timeout) | |
71 { | |
72 return -1; | |
73 } | |
74 | |
75 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid) | |
76 { | |
77 return -1; | |
78 } | |
79 | |
80 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, | |
81 struct itimerspec *ovalue) | |
82 { | |
83 return -1; | |
84 } | |
85 | |
86 int timer_delete(timer_t timerid) | |
87 { | |
88 return -1; | |
89 } | |
90 | |
91 #endif | |
92 | |
93 | |
94 typedef struct { | |
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95 ngx_uint_t events; |
719 | 96 } ngx_eventport_conf_t; |
97 | |
98 | |
99 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer); | |
100 static void ngx_eventport_done(ngx_cycle_t *cycle); | |
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101 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, |
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102 ngx_uint_t flags); |
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103 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, |
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104 ngx_uint_t flags); |
719 | 105 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle, |
106 ngx_msec_t timer, ngx_uint_t flags); | |
107 | |
108 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle); | |
109 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf); | |
110 | |
111 static int ep = -1; | |
112 static port_event_t *event_list; | |
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113 static ngx_uint_t nevents; |
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114 static timer_t event_timer = (timer_t) -1; |
719 | 115 |
116 static ngx_str_t eventport_name = ngx_string("eventport"); | |
117 | |
118 | |
119 static ngx_command_t ngx_eventport_commands[] = { | |
120 | |
121 { ngx_string("eventport_events"), | |
122 NGX_EVENT_CONF|NGX_CONF_TAKE1, | |
123 ngx_conf_set_num_slot, | |
124 0, | |
125 offsetof(ngx_eventport_conf_t, events), | |
126 NULL }, | |
127 | |
128 ngx_null_command | |
129 }; | |
130 | |
131 | |
132 ngx_event_module_t ngx_eventport_module_ctx = { | |
133 &eventport_name, | |
134 ngx_eventport_create_conf, /* create configuration */ | |
135 ngx_eventport_init_conf, /* init configuration */ | |
136 | |
137 { | |
138 ngx_eventport_add_event, /* add an event */ | |
139 ngx_eventport_del_event, /* delete an event */ | |
140 ngx_eventport_add_event, /* enable an event */ | |
141 ngx_eventport_del_event, /* disable an event */ | |
142 NULL, /* add an connection */ | |
143 NULL, /* delete an connection */ | |
144 NULL, /* process the changes */ | |
145 ngx_eventport_process_events, /* process the events */ | |
146 ngx_eventport_init, /* init the events */ | |
147 ngx_eventport_done, /* done the events */ | |
148 } | |
149 | |
150 }; | |
151 | |
152 ngx_module_t ngx_eventport_module = { | |
153 NGX_MODULE_V1, | |
154 &ngx_eventport_module_ctx, /* module context */ | |
155 ngx_eventport_commands, /* module directives */ | |
156 NGX_EVENT_MODULE, /* module type */ | |
157 NULL, /* init master */ | |
158 NULL, /* init module */ | |
159 NULL, /* init process */ | |
160 NULL, /* init thread */ | |
161 NULL, /* exit thread */ | |
162 NULL, /* exit process */ | |
163 NULL, /* exit master */ | |
164 NGX_MODULE_V1_PADDING | |
165 }; | |
166 | |
167 | |
168 static ngx_int_t | |
169 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer) | |
170 { | |
171 port_notify_t pn; | |
172 struct itimerspec its; | |
173 struct sigevent sev; | |
174 ngx_eventport_conf_t *epcf; | |
175 | |
176 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module); | |
177 | |
178 if (ep == -1) { | |
179 ep = port_create(); | |
180 | |
181 if (ep == -1) { | |
182 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
183 "port_create() failed"); | |
184 return NGX_ERROR; | |
185 } | |
186 } | |
187 | |
188 if (nevents < epcf->events) { | |
189 if (event_list) { | |
190 ngx_free(event_list); | |
191 } | |
192 | |
193 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events, | |
194 cycle->log); | |
195 if (event_list == NULL) { | |
196 return NGX_ERROR; | |
197 } | |
198 } | |
199 | |
200 ngx_event_flags = NGX_USE_EVENTPORT_EVENT; | |
201 | |
202 if (timer) { | |
203 ngx_memzero(&pn, sizeof(port_notify_t)); | |
204 pn.portnfy_port = ep; | |
205 | |
206 ngx_memzero(&sev, sizeof(struct sigevent)); | |
207 sev.sigev_notify = SIGEV_PORT; | |
208 #if !(NGX_TEST_BUILD_EVENTPORT) | |
209 sev.sigev_value.sival_ptr = &pn; | |
210 #endif | |
211 | |
212 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) { | |
213 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
214 "timer_create() failed"); | |
215 return NGX_ERROR; | |
216 } | |
217 | |
218 its.it_interval.tv_sec = timer / 1000; | |
219 its.it_interval.tv_nsec = (timer % 1000) * 1000000; | |
220 its.it_value.tv_sec = timer / 1000; | |
221 its.it_value.tv_nsec = (timer % 1000) * 1000000; | |
222 | |
223 if (timer_settime(event_timer, 0, &its, NULL) == -1) { | |
224 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
225 "timer_settime() failed"); | |
226 return NGX_ERROR; | |
227 } | |
228 | |
229 ngx_event_flags |= NGX_USE_TIMER_EVENT; | |
230 } | |
231 | |
232 nevents = epcf->events; | |
233 | |
234 ngx_io = ngx_os_io; | |
235 | |
236 ngx_event_actions = ngx_eventport_module_ctx.actions; | |
237 | |
238 return NGX_OK; | |
239 } | |
240 | |
241 | |
242 static void | |
243 ngx_eventport_done(ngx_cycle_t *cycle) | |
244 { | |
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245 if (event_timer != (timer_t) -1) { |
719 | 246 if (timer_delete(event_timer) == -1) { |
247 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
248 "timer_delete() failed"); | |
249 } | |
250 | |
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251 event_timer = (timer_t) -1; |
719 | 252 } |
253 | |
254 if (close(ep) == -1) { | |
255 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
256 "close() event port failed"); | |
257 } | |
258 | |
259 ep = -1; | |
260 | |
261 ngx_free(event_list); | |
262 | |
263 event_list = NULL; | |
264 nevents = 0; | |
265 } | |
266 | |
267 | |
268 static ngx_int_t | |
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269 ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 270 { |
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271 ngx_int_t events, prev; |
719 | 272 ngx_event_t *e; |
273 ngx_connection_t *c; | |
274 | |
275 c = ev->data; | |
276 | |
277 events = event; | |
278 | |
279 if (event == NGX_READ_EVENT) { | |
280 e = c->write; | |
281 prev = POLLOUT; | |
282 #if (NGX_READ_EVENT != POLLIN) | |
283 events = POLLIN; | |
284 #endif | |
285 | |
286 } else { | |
287 e = c->read; | |
288 prev = POLLIN; | |
289 #if (NGX_WRITE_EVENT != POLLOUT) | |
290 events = POLLOUT; | |
291 #endif | |
292 } | |
293 | |
294 if (e->oneshot) { | |
295 events |= prev; | |
296 } | |
297 | |
298 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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299 "eventport add event: fd:%d ev:%04Xi", c->fd, events); |
719 | 300 |
301 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events, | |
302 (void *) ((uintptr_t) ev | ev->instance)) | |
303 == -1) | |
304 { | |
305 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
306 "port_associate() failed"); | |
307 return NGX_ERROR; | |
308 } | |
309 | |
310 ev->active = 1; | |
311 ev->oneshot = 1; | |
312 | |
313 return NGX_OK; | |
314 } | |
315 | |
316 | |
317 static ngx_int_t | |
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318 ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 319 { |
320 ngx_event_t *e; | |
321 ngx_connection_t *c; | |
322 | |
323 /* | |
324 * when the file descriptor is closed, the event port automatically | |
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325 * dissociates it from the port, so we do not need to dissociate explicitly |
719 | 326 * the event before the closing the file descriptor |
327 */ | |
328 | |
329 if (flags & NGX_CLOSE_EVENT) { | |
330 ev->active = 0; | |
331 ev->oneshot = 0; | |
332 return NGX_OK; | |
333 } | |
334 | |
335 c = ev->data; | |
336 | |
337 if (event == NGX_READ_EVENT) { | |
338 e = c->write; | |
339 event = POLLOUT; | |
340 | |
341 } else { | |
342 e = c->read; | |
343 event = POLLIN; | |
344 } | |
345 | |
346 if (e->oneshot) { | |
347 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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348 "eventport change event: fd:%d ev:%04Xi", c->fd, event); |
719 | 349 |
350 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event, | |
351 (void *) ((uintptr_t) ev | ev->instance)) | |
352 == -1) | |
353 { | |
354 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
355 "port_associate() failed"); | |
356 return NGX_ERROR; | |
357 } | |
358 | |
359 } else { | |
360 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
361 "eventport del event: fd:%d", c->fd); | |
362 | |
363 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) { | |
364 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
365 "port_dissociate() failed"); | |
366 return NGX_ERROR; | |
367 } | |
368 } | |
369 | |
370 ev->active = 0; | |
371 ev->oneshot = 0; | |
372 | |
373 return NGX_OK; | |
374 } | |
375 | |
376 | |
377 ngx_int_t | |
378 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, | |
379 ngx_uint_t flags) | |
380 { | |
381 int n, revents; | |
382 u_int events; | |
383 ngx_err_t err; | |
384 ngx_int_t instance; | |
385 ngx_uint_t i, level; | |
386 ngx_event_t *ev, *rev, *wev, **queue; | |
387 ngx_connection_t *c; | |
388 struct timespec ts, *tp; | |
389 | |
390 if (timer == NGX_TIMER_INFINITE) { | |
391 tp = NULL; | |
392 | |
393 } else { | |
394 ts.tv_sec = timer / 1000; | |
395 ts.tv_nsec = (timer % 1000) * 1000000; | |
396 tp = &ts; | |
397 } | |
398 | |
399 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
400 "eventport timer: %M", timer); | |
401 | |
402 events = 1; | |
403 | |
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404 n = port_getn(ep, event_list, (u_int) nevents, &events, tp); |
719 | 405 |
406 err = ngx_errno; | |
407 | |
408 if (flags & NGX_UPDATE_TIME) { | |
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409 ngx_time_update(); |
719 | 410 } |
411 | |
412 if (n == -1) { | |
413 if (err == ETIME) { | |
414 if (timer != NGX_TIMER_INFINITE) { | |
415 return NGX_OK; | |
416 } | |
417 | |
418 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
419 "port_getn() returned no events without timeout"); | |
420 return NGX_ERROR; | |
421 } | |
422 | |
423 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT; | |
424 ngx_log_error(level, cycle->log, err, "port_getn() failed"); | |
425 return NGX_ERROR; | |
426 } | |
427 | |
428 if (events == 0) { | |
429 if (timer != NGX_TIMER_INFINITE) { | |
430 return NGX_OK; | |
431 } | |
432 | |
433 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
434 "port_getn() returned no events without timeout"); | |
435 return NGX_ERROR; | |
436 } | |
437 | |
438 ngx_mutex_lock(ngx_posted_events_mutex); | |
439 | |
440 for (i = 0; i < events; i++) { | |
441 | |
442 if (event_list[i].portev_source == PORT_SOURCE_TIMER) { | |
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443 ngx_time_update(); |
719 | 444 continue; |
445 } | |
446 | |
447 ev = event_list[i].portev_user; | |
448 | |
449 switch (event_list[i].portev_source) { | |
450 | |
451 case PORT_SOURCE_FD: | |
452 | |
453 instance = (uintptr_t) ev & 1; | |
454 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); | |
455 | |
456 if (ev->closed || ev->instance != instance) { | |
457 | |
458 /* | |
459 * the stale event from a file descriptor | |
460 * that was just closed in this iteration | |
461 */ | |
462 | |
463 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
464 "eventport: stale event %p", ev); | |
465 continue; | |
466 } | |
467 | |
468 revents = event_list[i].portev_events; | |
469 | |
470 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
471 "eventport: fd:%d, ev:%04Xd", | |
472 event_list[i].portev_object, revents); | |
473 | |
474 if (revents & (POLLERR|POLLHUP|POLLNVAL)) { | |
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475 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
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476 "port_getn() error fd:%d ev:%04Xd", |
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477 event_list[i].portev_object, revents); |
719 | 478 } |
479 | |
480 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) { | |
481 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
482 "strange port_getn() events fd:%d ev:%04Xd", | |
483 event_list[i].portev_object, revents); | |
484 } | |
485 | |
486 if ((revents & (POLLERR|POLLHUP|POLLNVAL)) | |
487 && (revents & (POLLIN|POLLOUT)) == 0) | |
488 { | |
489 /* | |
490 * if the error events were returned without POLLIN or POLLOUT, | |
491 * then add these flags to handle the events at least in one | |
492 * active handler | |
493 */ | |
494 | |
495 revents |= POLLIN|POLLOUT; | |
496 } | |
497 | |
498 c = ev->data; | |
499 rev = c->read; | |
500 wev = c->write; | |
501 | |
502 rev->active = 0; | |
503 wev->active = 0; | |
504 | |
505 if (revents & POLLIN) { | |
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506 |
719 | 507 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) { |
508 rev->posted_ready = 1; | |
509 | |
510 } else { | |
511 rev->ready = 1; | |
512 } | |
513 | |
514 if (flags & NGX_POST_EVENTS) { | |
515 queue = (ngx_event_t **) (rev->accept ? | |
516 &ngx_posted_accept_events : &ngx_posted_events); | |
517 | |
518 ngx_locked_post_event(rev, queue); | |
519 | |
520 } else { | |
521 rev->handler(rev); | |
1287
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parents:
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522 |
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parents:
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changeset
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523 if (ev->closed) { |
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parents:
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changeset
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524 continue; |
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parents:
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changeset
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525 } |
719 | 526 } |
527 | |
528 if (rev->accept) { | |
529 if (ngx_use_accept_mutex) { | |
530 ngx_accept_events = 1; | |
531 continue; | |
532 } | |
533 | |
534 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN, | |
535 (void *) ((uintptr_t) ev | ev->instance)) | |
536 == -1) | |
537 { | |
538 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
539 "port_associate() failed"); | |
540 return NGX_ERROR; | |
541 } | |
542 } | |
543 } | |
544 | |
545 if (revents & POLLOUT) { | |
546 | |
547 if (flags & NGX_POST_THREAD_EVENTS) { | |
548 wev->posted_ready = 1; | |
549 | |
550 } else { | |
551 wev->ready = 1; | |
552 } | |
553 | |
554 if (flags & NGX_POST_EVENTS) { | |
555 ngx_locked_post_event(wev, &ngx_posted_events); | |
556 | |
557 } else { | |
558 wev->handler(wev); | |
559 } | |
560 } | |
561 | |
562 continue; | |
563 | |
564 default: | |
565 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
566 "unexpected even_port object %d", | |
567 event_list[i].portev_object); | |
568 continue; | |
569 } | |
570 } | |
571 | |
572 ngx_mutex_unlock(ngx_posted_events_mutex); | |
573 | |
574 return NGX_OK; | |
575 } | |
576 | |
577 | |
578 static void * | |
579 ngx_eventport_create_conf(ngx_cycle_t *cycle) | |
580 { | |
581 ngx_eventport_conf_t *epcf; | |
582 | |
583 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t)); | |
584 if (epcf == NULL) { | |
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585 return NULL; |
719 | 586 } |
587 | |
588 epcf->events = NGX_CONF_UNSET; | |
589 | |
590 return epcf; | |
591 } | |
592 | |
593 | |
594 static char * | |
595 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf) | |
596 { | |
597 ngx_eventport_conf_t *epcf = conf; | |
598 | |
599 ngx_conf_init_uint_value(epcf->events, 32); | |
600 | |
601 return NGX_CONF_OK; | |
602 } |