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annotate src/event/modules/ngx_eventport_module.c @ 1925:6fd26b0e1009
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author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 11 Mar 2008 14:10:11 +0000 |
parents | a62fb6c156c5 |
children | 6e7daf852eec |
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 | |
43 int port_create(void) | |
44 { | |
45 return -1; | |
46 } | |
47 | |
48 int port_associate(int port, int source, uintptr_t object, int events, | |
49 void *user) | |
50 { | |
51 return -1; | |
52 } | |
53 | |
54 int port_dissociate(int port, int source, uintptr_t object) | |
55 { | |
56 return -1; | |
57 } | |
58 | |
59 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, | |
60 struct timespec *timeout) | |
61 { | |
62 return -1; | |
63 } | |
64 | |
65 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid) | |
66 { | |
67 return -1; | |
68 } | |
69 | |
70 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, | |
71 struct itimerspec *ovalue) | |
72 { | |
73 return -1; | |
74 } | |
75 | |
76 int timer_delete(timer_t timerid) | |
77 { | |
78 return -1; | |
79 } | |
80 | |
81 #endif | |
82 | |
83 | |
84 typedef struct { | |
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85 ngx_uint_t events; |
719 | 86 } ngx_eventport_conf_t; |
87 | |
88 | |
89 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer); | |
90 static void ngx_eventport_done(ngx_cycle_t *cycle); | |
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91 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, |
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92 ngx_uint_t flags); |
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93 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, |
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94 ngx_uint_t flags); |
719 | 95 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle, |
96 ngx_msec_t timer, ngx_uint_t flags); | |
97 | |
98 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle); | |
99 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf); | |
100 | |
101 static int ep = -1; | |
102 static port_event_t *event_list; | |
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103 static ngx_uint_t nevents; |
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104 static timer_t event_timer = (timer_t) -1; |
719 | 105 |
106 static ngx_str_t eventport_name = ngx_string("eventport"); | |
107 | |
108 | |
109 static ngx_command_t ngx_eventport_commands[] = { | |
110 | |
111 { ngx_string("eventport_events"), | |
112 NGX_EVENT_CONF|NGX_CONF_TAKE1, | |
113 ngx_conf_set_num_slot, | |
114 0, | |
115 offsetof(ngx_eventport_conf_t, events), | |
116 NULL }, | |
117 | |
118 ngx_null_command | |
119 }; | |
120 | |
121 | |
122 ngx_event_module_t ngx_eventport_module_ctx = { | |
123 &eventport_name, | |
124 ngx_eventport_create_conf, /* create configuration */ | |
125 ngx_eventport_init_conf, /* init configuration */ | |
126 | |
127 { | |
128 ngx_eventport_add_event, /* add an event */ | |
129 ngx_eventport_del_event, /* delete an event */ | |
130 ngx_eventport_add_event, /* enable an event */ | |
131 ngx_eventport_del_event, /* disable an event */ | |
132 NULL, /* add an connection */ | |
133 NULL, /* delete an connection */ | |
134 NULL, /* process the changes */ | |
135 ngx_eventport_process_events, /* process the events */ | |
136 ngx_eventport_init, /* init the events */ | |
137 ngx_eventport_done, /* done the events */ | |
138 } | |
139 | |
140 }; | |
141 | |
142 ngx_module_t ngx_eventport_module = { | |
143 NGX_MODULE_V1, | |
144 &ngx_eventport_module_ctx, /* module context */ | |
145 ngx_eventport_commands, /* module directives */ | |
146 NGX_EVENT_MODULE, /* module type */ | |
147 NULL, /* init master */ | |
148 NULL, /* init module */ | |
149 NULL, /* init process */ | |
150 NULL, /* init thread */ | |
151 NULL, /* exit thread */ | |
152 NULL, /* exit process */ | |
153 NULL, /* exit master */ | |
154 NGX_MODULE_V1_PADDING | |
155 }; | |
156 | |
157 | |
158 static ngx_int_t | |
159 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer) | |
160 { | |
161 port_notify_t pn; | |
162 struct itimerspec its; | |
163 struct sigevent sev; | |
164 ngx_eventport_conf_t *epcf; | |
165 | |
166 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module); | |
167 | |
168 if (ep == -1) { | |
169 ep = port_create(); | |
170 | |
171 if (ep == -1) { | |
172 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
173 "port_create() failed"); | |
174 return NGX_ERROR; | |
175 } | |
176 } | |
177 | |
178 if (nevents < epcf->events) { | |
179 if (event_list) { | |
180 ngx_free(event_list); | |
181 } | |
182 | |
183 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events, | |
184 cycle->log); | |
185 if (event_list == NULL) { | |
186 return NGX_ERROR; | |
187 } | |
188 } | |
189 | |
190 ngx_event_flags = NGX_USE_EVENTPORT_EVENT; | |
191 | |
192 if (timer) { | |
193 ngx_memzero(&pn, sizeof(port_notify_t)); | |
194 pn.portnfy_port = ep; | |
195 | |
196 ngx_memzero(&sev, sizeof(struct sigevent)); | |
197 sev.sigev_notify = SIGEV_PORT; | |
198 #if !(NGX_TEST_BUILD_EVENTPORT) | |
199 sev.sigev_value.sival_ptr = &pn; | |
200 #endif | |
201 | |
202 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) { | |
203 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
204 "timer_create() failed"); | |
205 return NGX_ERROR; | |
206 } | |
207 | |
208 its.it_interval.tv_sec = timer / 1000; | |
209 its.it_interval.tv_nsec = (timer % 1000) * 1000000; | |
210 its.it_value.tv_sec = timer / 1000; | |
211 its.it_value.tv_nsec = (timer % 1000) * 1000000; | |
212 | |
213 if (timer_settime(event_timer, 0, &its, NULL) == -1) { | |
214 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
215 "timer_settime() failed"); | |
216 return NGX_ERROR; | |
217 } | |
218 | |
219 ngx_event_flags |= NGX_USE_TIMER_EVENT; | |
220 } | |
221 | |
222 nevents = epcf->events; | |
223 | |
224 ngx_io = ngx_os_io; | |
225 | |
226 ngx_event_actions = ngx_eventport_module_ctx.actions; | |
227 | |
228 return NGX_OK; | |
229 } | |
230 | |
231 | |
232 static void | |
233 ngx_eventport_done(ngx_cycle_t *cycle) | |
234 { | |
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235 if (event_timer != (timer_t) -1) { |
719 | 236 if (timer_delete(event_timer) == -1) { |
237 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
238 "timer_delete() failed"); | |
239 } | |
240 | |
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241 event_timer = (timer_t) -1; |
719 | 242 } |
243 | |
244 if (close(ep) == -1) { | |
245 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
246 "close() event port failed"); | |
247 } | |
248 | |
249 ep = -1; | |
250 | |
251 ngx_free(event_list); | |
252 | |
253 event_list = NULL; | |
254 nevents = 0; | |
255 } | |
256 | |
257 | |
258 static ngx_int_t | |
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259 ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 260 { |
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261 ngx_int_t events, prev; |
719 | 262 ngx_event_t *e; |
263 ngx_connection_t *c; | |
264 | |
265 c = ev->data; | |
266 | |
267 events = event; | |
268 | |
269 if (event == NGX_READ_EVENT) { | |
270 e = c->write; | |
271 prev = POLLOUT; | |
272 #if (NGX_READ_EVENT != POLLIN) | |
273 events = POLLIN; | |
274 #endif | |
275 | |
276 } else { | |
277 e = c->read; | |
278 prev = POLLIN; | |
279 #if (NGX_WRITE_EVENT != POLLOUT) | |
280 events = POLLOUT; | |
281 #endif | |
282 } | |
283 | |
284 if (e->oneshot) { | |
285 events |= prev; | |
286 } | |
287 | |
288 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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289 "eventport add event: fd:%d ev:%04Xi", c->fd, events); |
719 | 290 |
291 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events, | |
292 (void *) ((uintptr_t) ev | ev->instance)) | |
293 == -1) | |
294 { | |
295 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
296 "port_associate() failed"); | |
297 return NGX_ERROR; | |
298 } | |
299 | |
300 ev->active = 1; | |
301 ev->oneshot = 1; | |
302 | |
303 return NGX_OK; | |
304 } | |
305 | |
306 | |
307 static ngx_int_t | |
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308 ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
719 | 309 { |
310 ngx_event_t *e; | |
311 ngx_connection_t *c; | |
312 | |
313 /* | |
314 * when the file descriptor is closed, the event port automatically | |
315 * dissociates it from the port, so we do not need to dissociate explicity | |
316 * the event before the closing the file descriptor | |
317 */ | |
318 | |
319 if (flags & NGX_CLOSE_EVENT) { | |
320 ev->active = 0; | |
321 ev->oneshot = 0; | |
322 return NGX_OK; | |
323 } | |
324 | |
325 c = ev->data; | |
326 | |
327 if (event == NGX_READ_EVENT) { | |
328 e = c->write; | |
329 event = POLLOUT; | |
330 | |
331 } else { | |
332 e = c->read; | |
333 event = POLLIN; | |
334 } | |
335 | |
336 if (e->oneshot) { | |
337 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
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338 "eventport change event: fd:%d ev:%04Xi", c->fd, event); |
719 | 339 |
340 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event, | |
341 (void *) ((uintptr_t) ev | ev->instance)) | |
342 == -1) | |
343 { | |
344 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
345 "port_associate() failed"); | |
346 return NGX_ERROR; | |
347 } | |
348 | |
349 } else { | |
350 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
351 "eventport del event: fd:%d", c->fd); | |
352 | |
353 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) { | |
354 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
355 "port_dissociate() failed"); | |
356 return NGX_ERROR; | |
357 } | |
358 } | |
359 | |
360 ev->active = 0; | |
361 ev->oneshot = 0; | |
362 | |
363 return NGX_OK; | |
364 } | |
365 | |
366 | |
367 ngx_int_t | |
368 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, | |
369 ngx_uint_t flags) | |
370 { | |
371 int n, revents; | |
372 u_int events; | |
373 ngx_err_t err; | |
374 ngx_int_t instance; | |
375 ngx_uint_t i, level; | |
376 ngx_event_t *ev, *rev, *wev, **queue; | |
377 ngx_connection_t *c; | |
378 struct timespec ts, *tp; | |
379 | |
380 if (timer == NGX_TIMER_INFINITE) { | |
381 tp = NULL; | |
382 | |
383 } else { | |
384 ts.tv_sec = timer / 1000; | |
385 ts.tv_nsec = (timer % 1000) * 1000000; | |
386 tp = &ts; | |
387 } | |
388 | |
389 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
390 "eventport timer: %M", timer); | |
391 | |
392 events = 1; | |
393 | |
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394 n = port_getn(ep, event_list, (u_int) nevents, &events, tp); |
719 | 395 |
396 err = ngx_errno; | |
397 | |
398 if (flags & NGX_UPDATE_TIME) { | |
399 ngx_time_update(0, 0); | |
400 } | |
401 | |
402 if (n == -1) { | |
403 if (err == ETIME) { | |
404 if (timer != NGX_TIMER_INFINITE) { | |
405 return NGX_OK; | |
406 } | |
407 | |
408 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
409 "port_getn() returned no events without timeout"); | |
410 return NGX_ERROR; | |
411 } | |
412 | |
413 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT; | |
414 ngx_log_error(level, cycle->log, err, "port_getn() failed"); | |
415 return NGX_ERROR; | |
416 } | |
417 | |
418 if (events == 0) { | |
419 if (timer != NGX_TIMER_INFINITE) { | |
420 return NGX_OK; | |
421 } | |
422 | |
423 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
424 "port_getn() returned no events without timeout"); | |
425 return NGX_ERROR; | |
426 } | |
427 | |
428 ngx_mutex_lock(ngx_posted_events_mutex); | |
429 | |
430 for (i = 0; i < events; i++) { | |
431 | |
432 if (event_list[i].portev_source == PORT_SOURCE_TIMER) { | |
433 ngx_time_update(0, 0); | |
434 continue; | |
435 } | |
436 | |
437 ev = event_list[i].portev_user; | |
438 | |
439 switch (event_list[i].portev_source) { | |
440 | |
441 case PORT_SOURCE_FD: | |
442 | |
443 instance = (uintptr_t) ev & 1; | |
444 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); | |
445 | |
446 if (ev->closed || ev->instance != instance) { | |
447 | |
448 /* | |
449 * the stale event from a file descriptor | |
450 * that was just closed in this iteration | |
451 */ | |
452 | |
453 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
454 "eventport: stale event %p", ev); | |
455 continue; | |
456 } | |
457 | |
458 revents = event_list[i].portev_events; | |
459 | |
460 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
461 "eventport: fd:%d, ev:%04Xd", | |
462 event_list[i].portev_object, revents); | |
463 | |
464 if (revents & (POLLERR|POLLHUP|POLLNVAL)) { | |
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465 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
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466 "port_getn() error fd:%d ev:%04Xd", |
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467 event_list[i].portev_object, revents); |
719 | 468 } |
469 | |
470 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) { | |
471 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
472 "strange port_getn() events fd:%d ev:%04Xd", | |
473 event_list[i].portev_object, revents); | |
474 } | |
475 | |
476 if ((revents & (POLLERR|POLLHUP|POLLNVAL)) | |
477 && (revents & (POLLIN|POLLOUT)) == 0) | |
478 { | |
479 /* | |
480 * if the error events were returned without POLLIN or POLLOUT, | |
481 * then add these flags to handle the events at least in one | |
482 * active handler | |
483 */ | |
484 | |
485 revents |= POLLIN|POLLOUT; | |
486 } | |
487 | |
488 c = ev->data; | |
489 rev = c->read; | |
490 wev = c->write; | |
491 | |
492 rev->active = 0; | |
493 wev->active = 0; | |
494 | |
495 if (revents & POLLIN) { | |
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496 |
719 | 497 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) { |
498 rev->posted_ready = 1; | |
499 | |
500 } else { | |
501 rev->ready = 1; | |
502 } | |
503 | |
504 if (flags & NGX_POST_EVENTS) { | |
505 queue = (ngx_event_t **) (rev->accept ? | |
506 &ngx_posted_accept_events : &ngx_posted_events); | |
507 | |
508 ngx_locked_post_event(rev, queue); | |
509 | |
510 } else { | |
511 rev->handler(rev); | |
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512 |
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513 if (ev->closed) { |
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514 continue; |
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515 } |
719 | 516 } |
517 | |
518 if (rev->accept) { | |
519 if (ngx_use_accept_mutex) { | |
520 ngx_accept_events = 1; | |
521 continue; | |
522 } | |
523 | |
524 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN, | |
525 (void *) ((uintptr_t) ev | ev->instance)) | |
526 == -1) | |
527 { | |
528 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
529 "port_associate() failed"); | |
530 return NGX_ERROR; | |
531 } | |
532 } | |
533 } | |
534 | |
535 if (revents & POLLOUT) { | |
536 | |
537 if (flags & NGX_POST_THREAD_EVENTS) { | |
538 wev->posted_ready = 1; | |
539 | |
540 } else { | |
541 wev->ready = 1; | |
542 } | |
543 | |
544 if (flags & NGX_POST_EVENTS) { | |
545 ngx_locked_post_event(wev, &ngx_posted_events); | |
546 | |
547 } else { | |
548 wev->handler(wev); | |
549 } | |
550 } | |
551 | |
552 continue; | |
553 | |
554 default: | |
555 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
556 "unexpected even_port object %d", | |
557 event_list[i].portev_object); | |
558 continue; | |
559 } | |
560 } | |
561 | |
562 ngx_mutex_unlock(ngx_posted_events_mutex); | |
563 | |
564 return NGX_OK; | |
565 } | |
566 | |
567 | |
568 static void * | |
569 ngx_eventport_create_conf(ngx_cycle_t *cycle) | |
570 { | |
571 ngx_eventport_conf_t *epcf; | |
572 | |
573 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t)); | |
574 if (epcf == NULL) { | |
575 return NGX_CONF_ERROR; | |
576 } | |
577 | |
578 epcf->events = NGX_CONF_UNSET; | |
579 | |
580 return epcf; | |
581 } | |
582 | |
583 | |
584 static char * | |
585 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf) | |
586 { | |
587 ngx_eventport_conf_t *epcf = conf; | |
588 | |
589 ngx_conf_init_uint_value(epcf->events, 32); | |
590 | |
591 return NGX_CONF_OK; | |
592 } |