Mercurial > hg > nginx
annotate src/event/modules/ngx_eventport_module.c @ 3474:d4c4cfdffe30
*) use previously cached GMT offset value to update time from a signal handler
*) change ngx_time_update() interface since there are no notification methods
those return time
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sat, 13 Mar 2010 18:08:07 +0000 |
parents | c7d57b539248 |
children | ab353d7dc182 |
rev | line source |
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719 | 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 #if (NGX_TEST_BUILD_EVENTPORT) | |
13 | |
14 #define ushort_t u_short | |
15 #define uint_t u_int | |
16 | |
17 /* Solaris declarations */ | |
18 | |
19 #define PORT_SOURCE_AIO 1 | |
20 #define PORT_SOURCE_TIMER 2 | |
21 #define PORT_SOURCE_USER 3 | |
22 #define PORT_SOURCE_FD 4 | |
23 #define PORT_SOURCE_ALERT 5 | |
24 #define PORT_SOURCE_MQ 6 | |
25 | |
26 #define ETIME 64 | |
27 | |
28 #define SIGEV_PORT 4 | |
29 | |
30 typedef struct { | |
31 int portev_events; /* event data is source specific */ | |
32 ushort_t portev_source; /* event source */ | |
33 ushort_t portev_pad; /* port internal use */ | |
34 uintptr_t portev_object; /* source specific object */ | |
35 void *portev_user; /* user cookie */ | |
36 } port_event_t; | |
37 | |
38 typedef struct port_notify { | |
39 int portnfy_port; /* bind request(s) to port */ | |
40 void *portnfy_user; /* user defined */ | |
41 } port_notify_t; | |
42 | |
1939
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43 #if (__FreeBSD_version < 700005) |
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44 |
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45 typedef struct itimerspec { /* definition per POSIX.4 */ |
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46 struct timespec it_interval;/* timer period */ |
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47 struct timespec it_value; /* timer expiration */ |
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48 } itimerspec_t; |
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49 |
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50 #endif |
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51 |
719 | 52 int port_create(void) |
53 { | |
54 return -1; | |
55 } | |
56 | |
57 int port_associate(int port, int source, uintptr_t object, int events, | |
58 void *user) | |
59 { | |
60 return -1; | |
61 } | |
62 | |
63 int port_dissociate(int port, int source, uintptr_t object) | |
64 { | |
65 return -1; | |
66 } | |
67 | |
68 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, | |
69 struct timespec *timeout) | |
70 { | |
71 return -1; | |
72 } | |
73 | |
74 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid) | |
75 { | |
76 return -1; | |
77 } | |
78 | |
79 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, | |
80 struct itimerspec *ovalue) | |
81 { | |
82 return -1; | |
83 } | |
84 | |
85 int timer_delete(timer_t timerid) | |
86 { | |
87 return -1; | |
88 } | |
89 | |
90 #endif | |
91 | |
92 | |
93 typedef struct { | |
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94 ngx_uint_t events; |
719 | 95 } ngx_eventport_conf_t; |
96 | |
97 | |
98 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer); | |
99 static void ngx_eventport_done(ngx_cycle_t *cycle); | |
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100 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, |
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101 ngx_uint_t flags); |
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102 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, |
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103 ngx_uint_t flags); |
719 | 104 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle, |
105 ngx_msec_t timer, ngx_uint_t flags); | |
106 | |
107 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle); | |
108 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf); | |
109 | |
110 static int ep = -1; | |
111 static port_event_t *event_list; | |
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112 static ngx_uint_t nevents; |
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113 static timer_t event_timer = (timer_t) -1; |
719 | 114 |
115 static ngx_str_t eventport_name = ngx_string("eventport"); | |
116 | |
117 | |
118 static ngx_command_t ngx_eventport_commands[] = { | |
119 | |
120 { ngx_string("eventport_events"), | |
121 NGX_EVENT_CONF|NGX_CONF_TAKE1, | |
122 ngx_conf_set_num_slot, | |
123 0, | |
124 offsetof(ngx_eventport_conf_t, events), | |
125 NULL }, | |
126 | |
127 ngx_null_command | |
128 }; | |
129 | |
130 | |
131 ngx_event_module_t ngx_eventport_module_ctx = { | |
132 &eventport_name, | |
133 ngx_eventport_create_conf, /* create configuration */ | |
134 ngx_eventport_init_conf, /* init configuration */ | |
135 | |
136 { | |
137 ngx_eventport_add_event, /* add an event */ | |
138 ngx_eventport_del_event, /* delete an event */ | |
139 ngx_eventport_add_event, /* enable an event */ | |
140 ngx_eventport_del_event, /* disable an event */ | |
141 NULL, /* add an connection */ | |
142 NULL, /* delete an connection */ | |
143 NULL, /* process the changes */ | |
144 ngx_eventport_process_events, /* process the events */ | |
145 ngx_eventport_init, /* init the events */ | |
146 ngx_eventport_done, /* done the events */ | |
147 } | |
148 | |
149 }; | |
150 | |
151 ngx_module_t ngx_eventport_module = { | |
152 NGX_MODULE_V1, | |
153 &ngx_eventport_module_ctx, /* module context */ | |
154 ngx_eventport_commands, /* module directives */ | |
155 NGX_EVENT_MODULE, /* module type */ | |
156 NULL, /* init master */ | |
157 NULL, /* init module */ | |
158 NULL, /* init process */ | |
159 NULL, /* init thread */ | |
160 NULL, /* exit thread */ | |
161 NULL, /* exit process */ | |
162 NULL, /* exit master */ | |
163 NGX_MODULE_V1_PADDING | |
164 }; | |
165 | |
166 | |
167 static ngx_int_t | |
168 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer) | |
169 { | |
170 port_notify_t pn; | |
171 struct itimerspec its; | |
172 struct sigevent sev; | |
173 ngx_eventport_conf_t *epcf; | |
174 | |
175 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module); | |
176 | |
177 if (ep == -1) { | |
178 ep = port_create(); | |
179 | |
180 if (ep == -1) { | |
181 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
182 "port_create() failed"); | |
183 return NGX_ERROR; | |
184 } | |
185 } | |
186 | |
187 if (nevents < epcf->events) { | |
188 if (event_list) { | |
189 ngx_free(event_list); | |
190 } | |
191 | |
192 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events, | |
193 cycle->log); | |
194 if (event_list == NULL) { | |
195 return NGX_ERROR; | |
196 } | |
197 } | |
198 | |
199 ngx_event_flags = NGX_USE_EVENTPORT_EVENT; | |
200 | |
201 if (timer) { | |
202 ngx_memzero(&pn, sizeof(port_notify_t)); | |
203 pn.portnfy_port = ep; | |
204 | |
205 ngx_memzero(&sev, sizeof(struct sigevent)); | |
206 sev.sigev_notify = SIGEV_PORT; | |
207 #if !(NGX_TEST_BUILD_EVENTPORT) | |
208 sev.sigev_value.sival_ptr = &pn; | |
209 #endif | |
210 | |
211 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) { | |
212 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
213 "timer_create() failed"); | |
214 return NGX_ERROR; | |
215 } | |
216 | |
217 its.it_interval.tv_sec = timer / 1000; | |
218 its.it_interval.tv_nsec = (timer % 1000) * 1000000; | |
219 its.it_value.tv_sec = timer / 1000; | |
220 its.it_value.tv_nsec = (timer % 1000) * 1000000; | |
221 | |
222 if (timer_settime(event_timer, 0, &its, NULL) == -1) { | |
223 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
224 "timer_settime() failed"); | |
225 return NGX_ERROR; | |
226 } | |
227 | |
228 ngx_event_flags |= NGX_USE_TIMER_EVENT; | |
229 } | |
230 | |
231 nevents = epcf->events; | |
232 | |
233 ngx_io = ngx_os_io; | |
234 | |
235 ngx_event_actions = ngx_eventport_module_ctx.actions; | |
236 | |
237 return NGX_OK; | |
238 } | |
239 | |
240 | |
241 static void | |
242 ngx_eventport_done(ngx_cycle_t *cycle) | |
243 { | |
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244 if (event_timer != (timer_t) -1) { |
719 | 245 if (timer_delete(event_timer) == -1) { |
246 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
247 "timer_delete() failed"); | |
248 } | |
249 | |
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250 event_timer = (timer_t) -1; |
719 | 251 } |
252 | |
253 if (close(ep) == -1) { | |
254 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
255 "close() event port failed"); | |
256 } | |
257 | |
258 ep = -1; | |
259 | |
260 ngx_free(event_list); | |
261 | |
262 event_list = NULL; | |
263 nevents = 0; | |
264 } | |
265 | |
266 | |
267 static ngx_int_t | |
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268 ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 269 { |
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270 ngx_int_t events, prev; |
719 | 271 ngx_event_t *e; |
272 ngx_connection_t *c; | |
273 | |
274 c = ev->data; | |
275 | |
276 events = event; | |
277 | |
278 if (event == NGX_READ_EVENT) { | |
279 e = c->write; | |
280 prev = POLLOUT; | |
281 #if (NGX_READ_EVENT != POLLIN) | |
282 events = POLLIN; | |
283 #endif | |
284 | |
285 } else { | |
286 e = c->read; | |
287 prev = POLLIN; | |
288 #if (NGX_WRITE_EVENT != POLLOUT) | |
289 events = POLLOUT; | |
290 #endif | |
291 } | |
292 | |
293 if (e->oneshot) { | |
294 events |= prev; | |
295 } | |
296 | |
297 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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298 "eventport add event: fd:%d ev:%04Xi", c->fd, events); |
719 | 299 |
300 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events, | |
301 (void *) ((uintptr_t) ev | ev->instance)) | |
302 == -1) | |
303 { | |
304 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
305 "port_associate() failed"); | |
306 return NGX_ERROR; | |
307 } | |
308 | |
309 ev->active = 1; | |
310 ev->oneshot = 1; | |
311 | |
312 return NGX_OK; | |
313 } | |
314 | |
315 | |
316 static ngx_int_t | |
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317 ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 318 { |
319 ngx_event_t *e; | |
320 ngx_connection_t *c; | |
321 | |
322 /* | |
323 * when the file descriptor is closed, the event port automatically | |
324 * dissociates it from the port, so we do not need to dissociate explicity | |
325 * the event before the closing the file descriptor | |
326 */ | |
327 | |
328 if (flags & NGX_CLOSE_EVENT) { | |
329 ev->active = 0; | |
330 ev->oneshot = 0; | |
331 return NGX_OK; | |
332 } | |
333 | |
334 c = ev->data; | |
335 | |
336 if (event == NGX_READ_EVENT) { | |
337 e = c->write; | |
338 event = POLLOUT; | |
339 | |
340 } else { | |
341 e = c->read; | |
342 event = POLLIN; | |
343 } | |
344 | |
345 if (e->oneshot) { | |
346 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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347 "eventport change event: fd:%d ev:%04Xi", c->fd, event); |
719 | 348 |
349 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event, | |
350 (void *) ((uintptr_t) ev | ev->instance)) | |
351 == -1) | |
352 { | |
353 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
354 "port_associate() failed"); | |
355 return NGX_ERROR; | |
356 } | |
357 | |
358 } else { | |
359 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
360 "eventport del event: fd:%d", c->fd); | |
361 | |
362 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) { | |
363 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
364 "port_dissociate() failed"); | |
365 return NGX_ERROR; | |
366 } | |
367 } | |
368 | |
369 ev->active = 0; | |
370 ev->oneshot = 0; | |
371 | |
372 return NGX_OK; | |
373 } | |
374 | |
375 | |
376 ngx_int_t | |
377 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, | |
378 ngx_uint_t flags) | |
379 { | |
380 int n, revents; | |
381 u_int events; | |
382 ngx_err_t err; | |
383 ngx_int_t instance; | |
384 ngx_uint_t i, level; | |
385 ngx_event_t *ev, *rev, *wev, **queue; | |
386 ngx_connection_t *c; | |
387 struct timespec ts, *tp; | |
388 | |
389 if (timer == NGX_TIMER_INFINITE) { | |
390 tp = NULL; | |
391 | |
392 } else { | |
393 ts.tv_sec = timer / 1000; | |
394 ts.tv_nsec = (timer % 1000) * 1000000; | |
395 tp = &ts; | |
396 } | |
397 | |
398 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
399 "eventport timer: %M", timer); | |
400 | |
401 events = 1; | |
402 | |
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403 n = port_getn(ep, event_list, (u_int) nevents, &events, tp); |
719 | 404 |
405 err = ngx_errno; | |
406 | |
407 if (flags & NGX_UPDATE_TIME) { | |
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408 ngx_time_update(0); |
719 | 409 } |
410 | |
411 if (n == -1) { | |
412 if (err == ETIME) { | |
413 if (timer != NGX_TIMER_INFINITE) { | |
414 return NGX_OK; | |
415 } | |
416 | |
417 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
418 "port_getn() returned no events without timeout"); | |
419 return NGX_ERROR; | |
420 } | |
421 | |
422 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT; | |
423 ngx_log_error(level, cycle->log, err, "port_getn() failed"); | |
424 return NGX_ERROR; | |
425 } | |
426 | |
427 if (events == 0) { | |
428 if (timer != NGX_TIMER_INFINITE) { | |
429 return NGX_OK; | |
430 } | |
431 | |
432 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
433 "port_getn() returned no events without timeout"); | |
434 return NGX_ERROR; | |
435 } | |
436 | |
437 ngx_mutex_lock(ngx_posted_events_mutex); | |
438 | |
439 for (i = 0; i < events; i++) { | |
440 | |
441 if (event_list[i].portev_source == PORT_SOURCE_TIMER) { | |
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442 ngx_time_update(0); |
719 | 443 continue; |
444 } | |
445 | |
446 ev = event_list[i].portev_user; | |
447 | |
448 switch (event_list[i].portev_source) { | |
449 | |
450 case PORT_SOURCE_FD: | |
451 | |
452 instance = (uintptr_t) ev & 1; | |
453 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); | |
454 | |
455 if (ev->closed || ev->instance != instance) { | |
456 | |
457 /* | |
458 * the stale event from a file descriptor | |
459 * that was just closed in this iteration | |
460 */ | |
461 | |
462 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
463 "eventport: stale event %p", ev); | |
464 continue; | |
465 } | |
466 | |
467 revents = event_list[i].portev_events; | |
468 | |
469 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
470 "eventport: fd:%d, ev:%04Xd", | |
471 event_list[i].portev_object, revents); | |
472 | |
473 if (revents & (POLLERR|POLLHUP|POLLNVAL)) { | |
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474 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
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475 "port_getn() error fd:%d ev:%04Xd", |
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476 event_list[i].portev_object, revents); |
719 | 477 } |
478 | |
479 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) { | |
480 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
481 "strange port_getn() events fd:%d ev:%04Xd", | |
482 event_list[i].portev_object, revents); | |
483 } | |
484 | |
485 if ((revents & (POLLERR|POLLHUP|POLLNVAL)) | |
486 && (revents & (POLLIN|POLLOUT)) == 0) | |
487 { | |
488 /* | |
489 * if the error events were returned without POLLIN or POLLOUT, | |
490 * then add these flags to handle the events at least in one | |
491 * active handler | |
492 */ | |
493 | |
494 revents |= POLLIN|POLLOUT; | |
495 } | |
496 | |
497 c = ev->data; | |
498 rev = c->read; | |
499 wev = c->write; | |
500 | |
501 rev->active = 0; | |
502 wev->active = 0; | |
503 | |
504 if (revents & POLLIN) { | |
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505 |
719 | 506 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) { |
507 rev->posted_ready = 1; | |
508 | |
509 } else { | |
510 rev->ready = 1; | |
511 } | |
512 | |
513 if (flags & NGX_POST_EVENTS) { | |
514 queue = (ngx_event_t **) (rev->accept ? | |
515 &ngx_posted_accept_events : &ngx_posted_events); | |
516 | |
517 ngx_locked_post_event(rev, queue); | |
518 | |
519 } else { | |
520 rev->handler(rev); | |
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521 |
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522 if (ev->closed) { |
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523 continue; |
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parents:
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524 } |
719 | 525 } |
526 | |
527 if (rev->accept) { | |
528 if (ngx_use_accept_mutex) { | |
529 ngx_accept_events = 1; | |
530 continue; | |
531 } | |
532 | |
533 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN, | |
534 (void *) ((uintptr_t) ev | ev->instance)) | |
535 == -1) | |
536 { | |
537 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
538 "port_associate() failed"); | |
539 return NGX_ERROR; | |
540 } | |
541 } | |
542 } | |
543 | |
544 if (revents & POLLOUT) { | |
545 | |
546 if (flags & NGX_POST_THREAD_EVENTS) { | |
547 wev->posted_ready = 1; | |
548 | |
549 } else { | |
550 wev->ready = 1; | |
551 } | |
552 | |
553 if (flags & NGX_POST_EVENTS) { | |
554 ngx_locked_post_event(wev, &ngx_posted_events); | |
555 | |
556 } else { | |
557 wev->handler(wev); | |
558 } | |
559 } | |
560 | |
561 continue; | |
562 | |
563 default: | |
564 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
565 "unexpected even_port object %d", | |
566 event_list[i].portev_object); | |
567 continue; | |
568 } | |
569 } | |
570 | |
571 ngx_mutex_unlock(ngx_posted_events_mutex); | |
572 | |
573 return NGX_OK; | |
574 } | |
575 | |
576 | |
577 static void * | |
578 ngx_eventport_create_conf(ngx_cycle_t *cycle) | |
579 { | |
580 ngx_eventport_conf_t *epcf; | |
581 | |
582 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t)); | |
583 if (epcf == NULL) { | |
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584 return NULL; |
719 | 585 } |
586 | |
587 epcf->events = NGX_CONF_UNSET; | |
588 | |
589 return epcf; | |
590 } | |
591 | |
592 | |
593 static char * | |
594 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf) | |
595 { | |
596 ngx_eventport_conf_t *epcf = conf; | |
597 | |
598 ngx_conf_init_uint_value(epcf->events, 32); | |
599 | |
600 return NGX_CONF_OK; | |
601 } |