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> |
|---|---|
| date | Sat, 13 Mar 2010 18:08:07 +0000 |
| parents | c7d57b539248 |
| children | ab353d7dc182 |
| rev | line source |
|---|---|
| 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 | |
|
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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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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 } |