|
0
|
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
|
|
18
|
12 #if (NGX_TEST_BUILD_EPOLL)
|
|
0
|
13
|
|
|
14 /* epoll declarations */
|
|
|
15
|
|
|
16 #define EPOLLIN 0x001
|
|
|
17 #define EPOLLPRI 0x002
|
|
|
18 #define EPOLLOUT 0x004
|
|
|
19 #define EPOLLRDNORM 0x040
|
|
|
20 #define EPOLLRDBAND 0x080
|
|
|
21 #define EPOLLWRNORM 0x100
|
|
|
22 #define EPOLLWRBAND 0x200
|
|
|
23 #define EPOLLMSG 0x400
|
|
|
24 #define EPOLLERR 0x008
|
|
|
25 #define EPOLLHUP 0x010
|
|
|
26
|
|
|
27 #define EPOLLET 0x80000000
|
|
|
28 #define EPOLLONESHOT 0x40000000
|
|
|
29
|
|
|
30 #define EPOLL_CTL_ADD 1
|
|
|
31 #define EPOLL_CTL_DEL 2
|
|
|
32 #define EPOLL_CTL_MOD 3
|
|
|
33
|
|
|
34 typedef union epoll_data {
|
|
|
35 void *ptr;
|
|
|
36 int fd;
|
|
|
37 uint32_t u32;
|
|
|
38 uint64_t u64;
|
|
|
39 } epoll_data_t;
|
|
|
40
|
|
|
41 struct epoll_event {
|
|
|
42 uint32_t events;
|
|
|
43 epoll_data_t data;
|
|
|
44 };
|
|
|
45
|
|
|
46 int epoll_create(int size);
|
|
|
47 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);
|
|
|
48 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout);
|
|
|
49
|
|
|
50 int epoll_create(int size)
|
|
|
51 {
|
|
|
52 return -1;
|
|
|
53 }
|
|
|
54
|
|
|
55 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
|
|
|
56 {
|
|
|
57 return -1;
|
|
|
58 }
|
|
|
59
|
|
|
60 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
|
|
|
61 {
|
|
|
62 return -1;
|
|
|
63 }
|
|
|
64
|
|
|
65 #endif
|
|
|
66
|
|
|
67
|
|
|
68 typedef struct {
|
|
|
69 u_int events;
|
|
|
70 } ngx_epoll_conf_t;
|
|
|
71
|
|
|
72
|
|
48
|
73 static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle);
|
|
0
|
74 static void ngx_epoll_done(ngx_cycle_t *cycle);
|
|
48
|
75 static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, int event, u_int flags);
|
|
|
76 static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, int event, u_int flags);
|
|
|
77 static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c);
|
|
|
78 static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c, u_int flags);
|
|
|
79 static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle);
|
|
0
|
80
|
|
|
81 static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
|
|
|
82 static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf);
|
|
|
83
|
|
|
84 static int ep = -1;
|
|
|
85 static struct epoll_event *event_list;
|
|
|
86 static u_int nevents;
|
|
|
87
|
|
|
88
|
|
|
89 static ngx_str_t epoll_name = ngx_string("epoll");
|
|
|
90
|
|
|
91 static ngx_command_t ngx_epoll_commands[] = {
|
|
|
92
|
|
48
|
93 { ngx_string("epoll_events"),
|
|
|
94 NGX_EVENT_CONF|NGX_CONF_TAKE1,
|
|
|
95 ngx_conf_set_num_slot,
|
|
|
96 0,
|
|
|
97 offsetof(ngx_epoll_conf_t, events),
|
|
|
98 NULL },
|
|
0
|
99
|
|
48
|
100 ngx_null_command
|
|
0
|
101 };
|
|
|
102
|
|
|
103
|
|
|
104 ngx_event_module_t ngx_epoll_module_ctx = {
|
|
|
105 &epoll_name,
|
|
|
106 ngx_epoll_create_conf, /* create configuration */
|
|
|
107 ngx_epoll_init_conf, /* init configuration */
|
|
|
108
|
|
|
109 {
|
|
|
110 ngx_epoll_add_event, /* add an event */
|
|
|
111 ngx_epoll_del_event, /* delete an event */
|
|
|
112 ngx_epoll_add_event, /* enable an event */
|
|
|
113 ngx_epoll_del_event, /* disable an event */
|
|
|
114 ngx_epoll_add_connection, /* add an connection */
|
|
|
115 ngx_epoll_del_connection, /* delete an connection */
|
|
|
116 NULL, /* process the changes */
|
|
|
117 ngx_epoll_process_events, /* process the events */
|
|
|
118 ngx_epoll_init, /* init the events */
|
|
|
119 ngx_epoll_done, /* done the events */
|
|
|
120 }
|
|
|
121 };
|
|
|
122
|
|
|
123 ngx_module_t ngx_epoll_module = {
|
|
|
124 NGX_MODULE,
|
|
|
125 &ngx_epoll_module_ctx, /* module context */
|
|
|
126 ngx_epoll_commands, /* module directives */
|
|
|
127 NGX_EVENT_MODULE, /* module type */
|
|
|
128 NULL, /* init module */
|
|
|
129 NULL /* init process */
|
|
|
130 };
|
|
|
131
|
|
|
132
|
|
48
|
133 static ngx_int_t
|
|
|
134 ngx_epoll_init(ngx_cycle_t *cycle)
|
|
0
|
135 {
|
|
|
136 size_t n;
|
|
|
137 ngx_event_conf_t *ecf;
|
|
|
138 ngx_epoll_conf_t *epcf;
|
|
|
139
|
|
|
140 ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
|
|
|
141
|
|
|
142 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module);
|
|
|
143
|
|
|
144 if (ep == -1) {
|
|
|
145 ep = epoll_create(ecf->connections / 2);
|
|
|
146
|
|
|
147 if (ep == -1) {
|
|
|
148 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
149 "epoll_create() failed");
|
|
|
150 return NGX_ERROR;
|
|
|
151 }
|
|
|
152 }
|
|
|
153
|
|
|
154 if (nevents < epcf->events) {
|
|
|
155 if (event_list) {
|
|
|
156 ngx_free(event_list);
|
|
|
157 }
|
|
|
158
|
|
|
159 event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events,
|
|
|
160 cycle->log);
|
|
|
161 if (event_list == NULL) {
|
|
|
162 return NGX_ERROR;
|
|
|
163 }
|
|
|
164 }
|
|
|
165
|
|
|
166 nevents = epcf->events;
|
|
|
167
|
|
|
168 ngx_io = ngx_os_io;
|
|
|
169
|
|
|
170 ngx_event_actions = ngx_epoll_module_ctx.actions;
|
|
|
171
|
|
18
|
172 #if (NGX_HAVE_CLEAR_EVENT)
|
|
0
|
173 ngx_event_flags = NGX_USE_CLEAR_EVENT
|
|
|
174 #else
|
|
|
175 ngx_event_flags = NGX_USE_LEVEL_EVENT
|
|
|
176 #endif
|
|
4
|
177 |NGX_USE_GREEDY_EVENT
|
|
0
|
178 |NGX_USE_EPOLL_EVENT;
|
|
|
179
|
|
|
180 return NGX_OK;
|
|
|
181 }
|
|
|
182
|
|
|
183
|
|
48
|
184 static void
|
|
|
185 ngx_epoll_done(ngx_cycle_t *cycle)
|
|
0
|
186 {
|
|
|
187 if (close(ep) == -1) {
|
|
|
188 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
189 "epoll close() failed");
|
|
|
190 }
|
|
|
191
|
|
|
192 ep = -1;
|
|
|
193
|
|
|
194 ngx_free(event_list);
|
|
|
195
|
|
|
196 event_list = NULL;
|
|
|
197 nevents = 0;
|
|
|
198 }
|
|
|
199
|
|
|
200
|
|
48
|
201 static ngx_int_t
|
|
|
202 ngx_epoll_add_event(ngx_event_t *ev, int event, u_int flags)
|
|
0
|
203 {
|
|
32
|
204 int op;
|
|
|
205 uint32_t events, prev;
|
|
0
|
206 ngx_event_t *e;
|
|
|
207 ngx_connection_t *c;
|
|
|
208 struct epoll_event ee;
|
|
|
209
|
|
|
210 c = ev->data;
|
|
|
211
|
|
32
|
212 events = (uint32_t) event;
|
|
|
213
|
|
0
|
214 if (event == NGX_READ_EVENT) {
|
|
|
215 e = c->write;
|
|
|
216 prev = EPOLLOUT;
|
|
|
217 #if (NGX_READ_EVENT != EPOLLIN)
|
|
32
|
218 events = EPOLLIN;
|
|
0
|
219 #endif
|
|
|
220
|
|
|
221 } else {
|
|
|
222 e = c->read;
|
|
|
223 prev = EPOLLIN;
|
|
|
224 #if (NGX_WRITE_EVENT != EPOLLOUT)
|
|
32
|
225 events = EPOLLOUT;
|
|
0
|
226 #endif
|
|
|
227 }
|
|
|
228
|
|
|
229 if (e->active) {
|
|
|
230 op = EPOLL_CTL_MOD;
|
|
32
|
231 events |= prev;
|
|
0
|
232
|
|
|
233 } else {
|
|
|
234 op = EPOLL_CTL_ADD;
|
|
|
235 }
|
|
|
236
|
|
32
|
237 ee.events = events | flags;
|
|
30
|
238 ee.data.u64 = (uintptr_t) c | ev->instance;
|
|
0
|
239
|
|
|
240 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
241 "epoll add event: fd:%d op:%d ev:%08XD",
|
|
0
|
242 c->fd, op, ee.events);
|
|
|
243
|
|
|
244 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
245 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
246 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
247 return NGX_ERROR;
|
|
|
248 }
|
|
|
249
|
|
|
250 ev->active = 1;
|
|
|
251 #if 0
|
|
|
252 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
|
|
|
253 #endif
|
|
|
254
|
|
|
255 return NGX_OK;
|
|
|
256 }
|
|
|
257
|
|
|
258
|
|
48
|
259 static ngx_int_t
|
|
|
260 ngx_epoll_del_event(ngx_event_t *ev, int event, u_int flags)
|
|
0
|
261 {
|
|
32
|
262 int op;
|
|
|
263 uint32_t prev;
|
|
0
|
264 ngx_event_t *e;
|
|
|
265 ngx_connection_t *c;
|
|
|
266 struct epoll_event ee;
|
|
|
267
|
|
|
268 /*
|
|
32
|
269 * when the file descriptor is closed, the epoll automatically deletes
|
|
|
270 * it from its queue, so we do not need to delete explicity the event
|
|
0
|
271 * before the closing the file descriptor
|
|
|
272 */
|
|
|
273
|
|
|
274 if (flags & NGX_CLOSE_EVENT) {
|
|
|
275 ev->active = 0;
|
|
|
276 return NGX_OK;
|
|
|
277 }
|
|
|
278
|
|
|
279 c = ev->data;
|
|
|
280
|
|
|
281 if (event == NGX_READ_EVENT) {
|
|
|
282 e = c->write;
|
|
|
283 prev = EPOLLOUT;
|
|
|
284
|
|
|
285 } else {
|
|
|
286 e = c->read;
|
|
|
287 prev = EPOLLIN;
|
|
|
288 }
|
|
|
289
|
|
|
290 if (e->active) {
|
|
|
291 op = EPOLL_CTL_MOD;
|
|
|
292 ee.events = prev | flags;
|
|
30
|
293 ee.data.u64 = (uintptr_t) c | ev->instance;
|
|
0
|
294
|
|
|
295 } else {
|
|
|
296 op = EPOLL_CTL_DEL;
|
|
|
297 ee.events = 0;
|
|
|
298 ee.data.ptr = NULL;
|
|
|
299 }
|
|
|
300
|
|
|
301 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
302 "epoll del event: fd:%d op:%d ev:%08XD",
|
|
0
|
303 c->fd, op, ee.events);
|
|
|
304
|
|
|
305 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
306 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
307 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
308 return NGX_ERROR;
|
|
|
309 }
|
|
|
310
|
|
|
311 ev->active = 0;
|
|
|
312
|
|
|
313 return NGX_OK;
|
|
|
314 }
|
|
|
315
|
|
|
316
|
|
48
|
317 static ngx_int_t
|
|
|
318 ngx_epoll_add_connection(ngx_connection_t *c)
|
|
0
|
319 {
|
|
|
320 struct epoll_event ee;
|
|
|
321
|
|
|
322 ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
|
|
30
|
323 ee.data.u64 = (uintptr_t) c | c->read->instance;
|
|
0
|
324
|
|
|
325 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
10
|
326 "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events);
|
|
0
|
327
|
|
|
328 if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) {
|
|
|
329 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
330 "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd);
|
|
|
331 return NGX_ERROR;
|
|
|
332 }
|
|
|
333
|
|
|
334 c->read->active = 1;
|
|
|
335 c->write->active = 1;
|
|
|
336
|
|
|
337 return NGX_OK;
|
|
|
338 }
|
|
|
339
|
|
|
340
|
|
48
|
341 static ngx_int_t
|
|
|
342 ngx_epoll_del_connection(ngx_connection_t *c, u_int flags)
|
|
0
|
343 {
|
|
|
344 int op;
|
|
|
345 struct epoll_event ee;
|
|
|
346
|
|
|
347 /*
|
|
|
348 * when the file descriptor is closed the epoll automatically deletes
|
|
|
349 * it from its queue so we do not need to delete explicity the event
|
|
|
350 * before the closing the file descriptor
|
|
|
351 */
|
|
|
352
|
|
|
353 if (flags & NGX_CLOSE_EVENT) {
|
|
|
354 c->read->active = 0;
|
|
|
355 c->write->active = 0;
|
|
|
356 return NGX_OK;
|
|
|
357 }
|
|
|
358
|
|
|
359 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
|
360 "epoll del connection: fd:%d", c->fd);
|
|
|
361
|
|
|
362 op = EPOLL_CTL_DEL;
|
|
|
363 ee.events = 0;
|
|
30
|
364 ee.data.u64 = 0;
|
|
0
|
365
|
|
|
366 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
367 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
368 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
369 return NGX_ERROR;
|
|
|
370 }
|
|
|
371
|
|
|
372 c->read->active = 0;
|
|
|
373 c->write->active = 0;
|
|
|
374
|
|
|
375 return NGX_OK;
|
|
|
376 }
|
|
|
377
|
|
|
378
|
|
48
|
379 static ngx_int_t
|
|
|
380 ngx_epoll_process_events(ngx_cycle_t *cycle)
|
|
0
|
381 {
|
|
|
382 int events;
|
|
|
383 size_t n;
|
|
32
|
384 uint32_t revents;
|
|
0
|
385 ngx_int_t instance, i;
|
|
|
386 ngx_uint_t lock, accept_lock, expire;
|
|
|
387 ngx_err_t err;
|
|
|
388 ngx_log_t *log;
|
|
|
389 ngx_msec_t timer;
|
|
|
390 ngx_event_t *rev, *wev;
|
|
|
391 struct timeval tv;
|
|
|
392 ngx_connection_t *c;
|
|
|
393 ngx_epoch_msec_t delta;
|
|
|
394
|
|
|
395 for ( ;; ) {
|
|
|
396 timer = ngx_event_find_timer();
|
|
|
397
|
|
|
398 #if (NGX_THREADS)
|
|
|
399
|
|
|
400 if (timer == NGX_TIMER_ERROR) {
|
|
|
401 return NGX_ERROR;
|
|
|
402 }
|
|
|
403
|
|
|
404 if (timer == NGX_TIMER_INFINITE || timer > 500) {
|
|
|
405 timer = 500;
|
|
|
406 break;
|
|
|
407 }
|
|
|
408
|
|
|
409 #endif
|
|
|
410
|
|
|
411 if (timer != 0) {
|
|
|
412 break;
|
|
|
413 }
|
|
|
414
|
|
|
415 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
416 "epoll expired timer");
|
|
|
417
|
|
|
418 ngx_event_expire_timers((ngx_msec_t)
|
|
|
419 (ngx_elapsed_msec - ngx_old_elapsed_msec));
|
|
|
420
|
|
|
421 if (ngx_posted_events && ngx_threaded) {
|
|
|
422 ngx_wakeup_worker_thread(cycle);
|
|
|
423 }
|
|
|
424 }
|
|
|
425
|
|
|
426 /* NGX_TIMER_INFINITE == INFTIM */
|
|
|
427
|
|
|
428 if (timer == NGX_TIMER_INFINITE) {
|
|
|
429 expire = 0;
|
|
|
430
|
|
|
431 } else {
|
|
|
432 expire = 1;
|
|
|
433 }
|
|
|
434
|
|
|
435 ngx_old_elapsed_msec = ngx_elapsed_msec;
|
|
|
436 accept_lock = 0;
|
|
|
437
|
|
|
438 if (ngx_accept_mutex) {
|
|
|
439 if (ngx_accept_disabled > 0) {
|
|
|
440 ngx_accept_disabled--;
|
|
|
441
|
|
|
442 } else {
|
|
|
443 if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) {
|
|
|
444 return NGX_ERROR;
|
|
|
445 }
|
|
|
446
|
|
|
447 if (ngx_accept_mutex_held) {
|
|
|
448 accept_lock = 1;
|
|
|
449
|
|
|
450 } else if (timer == NGX_TIMER_INFINITE
|
|
|
451 || timer > ngx_accept_mutex_delay)
|
|
|
452 {
|
|
|
453 timer = ngx_accept_mutex_delay;
|
|
|
454 expire = 0;
|
|
|
455 }
|
|
|
456 }
|
|
|
457 }
|
|
|
458
|
|
|
459 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
460 "epoll timer: %d", timer);
|
|
|
461
|
|
|
462 events = epoll_wait(ep, event_list, nevents, timer);
|
|
|
463
|
|
|
464 if (events == -1) {
|
|
|
465 err = ngx_errno;
|
|
|
466 } else {
|
|
|
467 err = 0;
|
|
|
468 }
|
|
|
469
|
|
|
470 ngx_gettimeofday(&tv);
|
|
|
471 ngx_time_update(tv.tv_sec);
|
|
|
472
|
|
|
473 delta = ngx_elapsed_msec;
|
|
|
474 ngx_elapsed_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000
|
|
|
475 + tv.tv_usec / 1000 - ngx_start_msec;
|
|
|
476
|
|
|
477 if (timer != NGX_TIMER_INFINITE) {
|
|
|
478 delta = ngx_elapsed_msec - delta;
|
|
|
479
|
|
|
480 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
481 "epoll timer: %d, delta: %d", timer, (int) delta);
|
|
|
482 } else {
|
|
|
483 if (events == 0) {
|
|
|
484 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
485 "epoll_wait() returned no events without timeout");
|
|
|
486 ngx_accept_mutex_unlock();
|
|
|
487 return NGX_ERROR;
|
|
|
488 }
|
|
|
489 }
|
|
|
490
|
|
|
491 if (err) {
|
|
|
492 ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
|
|
|
493 cycle->log, err, "epoll_wait() failed");
|
|
|
494 ngx_accept_mutex_unlock();
|
|
|
495 return NGX_ERROR;
|
|
|
496 }
|
|
|
497
|
|
|
498 if (events > 0) {
|
|
|
499 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
500 ngx_accept_mutex_unlock();
|
|
|
501 return NGX_ERROR;
|
|
|
502 }
|
|
|
503
|
|
|
504 lock = 1;
|
|
|
505
|
|
|
506 } else {
|
|
|
507 lock =0;
|
|
|
508 }
|
|
|
509
|
|
|
510 log = cycle->log;
|
|
|
511
|
|
|
512 for (i = 0; i < events; i++) {
|
|
|
513 c = event_list[i].data.ptr;
|
|
|
514
|
|
|
515 instance = (uintptr_t) c & 1;
|
|
|
516 c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1);
|
|
|
517
|
|
|
518 rev = c->read;
|
|
|
519
|
|
|
520 if (c->fd == -1 || rev->instance != instance) {
|
|
|
521
|
|
|
522 /*
|
|
|
523 * the stale event from a file descriptor
|
|
|
524 * that was just closed in this iteration
|
|
|
525 */
|
|
|
526
|
|
|
527 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
528 "epoll: stale event %p", c);
|
|
0
|
529 continue;
|
|
|
530 }
|
|
|
531
|
|
|
532 #if (NGX_DEBUG0)
|
|
|
533 log = c->log ? c->log : cycle->log;
|
|
|
534 #endif
|
|
|
535
|
|
32
|
536 revents = event_list[i].events;
|
|
|
537
|
|
0
|
538 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, log, 0,
|
|
10
|
539 "epoll: fd:%d ev:%04XD d:%p",
|
|
32
|
540 c->fd, revents, event_list[i].data);
|
|
0
|
541
|
|
32
|
542 if (revents & (EPOLLERR|EPOLLHUP)) {
|
|
0
|
543 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
|
|
10
|
544 "epoll_wait() error on fd:%d ev:%04XD",
|
|
32
|
545 c->fd, revents);
|
|
|
546 }
|
|
|
547
|
|
|
548 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
|
|
|
549 ngx_log_error(NGX_LOG_ALERT, log, 0,
|
|
|
550 "strange epoll_wait() events fd:%d ev:%04XD",
|
|
|
551 c->fd, revents);
|
|
0
|
552 }
|
|
|
553
|
|
32
|
554 if ((revents & (EPOLLERR|EPOLLHUP))
|
|
|
555 && (revents & (EPOLLIN|EPOLLOUT)) == 0)
|
|
|
556 {
|
|
|
557 /*
|
|
|
558 * if the error events were returned without EPOLLIN or EPOLLOUT,
|
|
|
559 * then add these flags to handle the events at least in one
|
|
|
560 * active handler
|
|
|
561 */
|
|
|
562
|
|
|
563 revents |= EPOLLIN|EPOLLOUT;
|
|
0
|
564 }
|
|
|
565
|
|
|
566 wev = c->write;
|
|
|
567
|
|
32
|
568 if ((revents & EPOLLOUT) && wev->active) {
|
|
|
569
|
|
0
|
570 if (ngx_threaded) {
|
|
|
571 wev->posted_ready = 1;
|
|
|
572 ngx_post_event(wev);
|
|
|
573
|
|
|
574 } else {
|
|
|
575 wev->ready = 1;
|
|
|
576
|
|
|
577 if (!ngx_accept_mutex_held) {
|
|
|
578 wev->event_handler(wev);
|
|
|
579
|
|
|
580 } else {
|
|
|
581 ngx_post_event(wev);
|
|
|
582 }
|
|
|
583 }
|
|
|
584 }
|
|
|
585
|
|
|
586 /*
|
|
|
587 * EPOLLIN must be handled after EPOLLOUT because we use
|
|
|
588 * the optimization to avoid the unnecessary mutex locking/unlocking
|
|
|
589 * if the accept event is the last one.
|
|
|
590 */
|
|
|
591
|
|
32
|
592 if ((revents & EPOLLIN) && rev->active) {
|
|
|
593
|
|
0
|
594 if (ngx_threaded && !rev->accept) {
|
|
|
595 rev->posted_ready = 1;
|
|
|
596
|
|
|
597 ngx_post_event(rev);
|
|
|
598
|
|
|
599 continue;
|
|
|
600 }
|
|
|
601
|
|
|
602 rev->ready = 1;
|
|
|
603
|
|
|
604 if (!ngx_threaded && !ngx_accept_mutex_held) {
|
|
|
605 rev->event_handler(rev);
|
|
|
606
|
|
|
607 } else if (!rev->accept) {
|
|
|
608 ngx_post_event(rev);
|
|
|
609
|
|
|
610 } else if (ngx_accept_disabled <= 0) {
|
|
|
611
|
|
|
612 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
613
|
|
|
614 rev->event_handler(rev);
|
|
|
615
|
|
|
616 if (ngx_accept_disabled > 0) {
|
|
|
617 ngx_accept_mutex_unlock();
|
|
|
618 accept_lock = 0;
|
|
|
619 }
|
|
|
620
|
|
|
621 if (i + 1 == events) {
|
|
|
622 lock = 0;
|
|
|
623 break;
|
|
|
624 }
|
|
|
625
|
|
|
626 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
627 if (accept_lock) {
|
|
|
628 ngx_accept_mutex_unlock();
|
|
|
629 }
|
|
|
630 return NGX_ERROR;
|
|
|
631 }
|
|
|
632 }
|
|
|
633 }
|
|
|
634 }
|
|
|
635
|
|
|
636 if (accept_lock) {
|
|
|
637 ngx_accept_mutex_unlock();
|
|
|
638 }
|
|
|
639
|
|
|
640 if (lock) {
|
|
|
641 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
642 }
|
|
|
643
|
|
|
644 if (expire && delta) {
|
|
|
645 ngx_event_expire_timers((ngx_msec_t) delta);
|
|
|
646 }
|
|
|
647
|
|
|
648 if (ngx_posted_events) {
|
|
|
649 if (ngx_threaded) {
|
|
|
650 ngx_wakeup_worker_thread(cycle);
|
|
|
651
|
|
|
652 } else {
|
|
|
653 ngx_event_process_posted(cycle);
|
|
|
654 }
|
|
|
655 }
|
|
|
656
|
|
|
657 return NGX_OK;
|
|
|
658 }
|
|
|
659
|
|
|
660
|
|
48
|
661 static void *
|
|
|
662 ngx_epoll_create_conf(ngx_cycle_t *cycle)
|
|
0
|
663 {
|
|
|
664 ngx_epoll_conf_t *epcf;
|
|
|
665
|
|
|
666 ngx_test_null(epcf, ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t)),
|
|
|
667 NGX_CONF_ERROR);
|
|
|
668
|
|
|
669 epcf->events = NGX_CONF_UNSET;
|
|
|
670
|
|
|
671 return epcf;
|
|
|
672 }
|
|
|
673
|
|
|
674
|
|
48
|
675 static char *
|
|
|
676 ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
0
|
677 {
|
|
|
678 ngx_epoll_conf_t *epcf = conf;
|
|
|
679
|
|
|
680 ngx_conf_init_unsigned_value(epcf->events, 512);
|
|
|
681
|
|
|
682 return NGX_CONF_OK;
|
|
|
683 }
|
