| /* | |
| * Copyright (C) Igor Sysoev | |
| */ | |
| #include <ngx_config.h> | |
| #include <ngx_core.h> | |
| #include <ngx_event.h> | |
| #if (NGX_TEST_BUILD_EVENTPORT) | |
| #define ushort_t u_short | |
| #define uint_t u_int | |
| /* Solaris declarations */ | |
| #define PORT_SOURCE_AIO 1 | |
| #define PORT_SOURCE_TIMER 2 | |
| #define PORT_SOURCE_USER 3 | |
| #define PORT_SOURCE_FD 4 | |
| #define PORT_SOURCE_ALERT 5 | |
| #define PORT_SOURCE_MQ 6 | |
| #define ETIME 64 | |
| #define SIGEV_PORT 4 | |
| typedef struct { | |
| int portev_events; /* event data is source specific */ | |
| ushort_t portev_source; /* event source */ | |
| ushort_t portev_pad; /* port internal use */ | |
| uintptr_t portev_object; /* source specific object */ | |
| void *portev_user; /* user cookie */ | |
| } port_event_t; | |
| typedef struct port_notify { | |
| int portnfy_port; /* bind request(s) to port */ | |
| void *portnfy_user; /* user defined */ | |
| } port_notify_t; | |
| #if (__FreeBSD_version < 700005) | |
| typedef struct itimerspec { /* definition per POSIX.4 */ | |
| struct timespec it_interval;/* timer period */ | |
| struct timespec it_value; /* timer expiration */ | |
| } itimerspec_t; | |
| #endif | |
| int port_create(void) | |
| { | |
| return -1; | |
| } | |
| int port_associate(int port, int source, uintptr_t object, int events, | |
| void *user) | |
| { | |
| return -1; | |
| } | |
| int port_dissociate(int port, int source, uintptr_t object) | |
| { | |
| return -1; | |
| } | |
| int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, | |
| struct timespec *timeout) | |
| { | |
| return -1; | |
| } | |
| int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid) | |
| { | |
| return -1; | |
| } | |
| int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, | |
| struct itimerspec *ovalue) | |
| { | |
| return -1; | |
| } | |
| int timer_delete(timer_t timerid) | |
| { | |
| return -1; | |
| } | |
| #endif | |
| typedef struct { | |
| ngx_uint_t events; | |
| } ngx_eventport_conf_t; | |
| static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer); | |
| static void ngx_eventport_done(ngx_cycle_t *cycle); | |
| static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, | |
| ngx_uint_t flags); | |
| static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, | |
| ngx_uint_t flags); | |
| static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle, | |
| ngx_msec_t timer, ngx_uint_t flags); | |
| static void *ngx_eventport_create_conf(ngx_cycle_t *cycle); | |
| static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf); | |
| static int ep = -1; | |
| static port_event_t *event_list; | |
| static ngx_uint_t nevents; | |
| static timer_t event_timer = (timer_t) -1; | |
| static ngx_str_t eventport_name = ngx_string("eventport"); | |
| static ngx_command_t ngx_eventport_commands[] = { | |
| { ngx_string("eventport_events"), | |
| NGX_EVENT_CONF|NGX_CONF_TAKE1, | |
| ngx_conf_set_num_slot, | |
| 0, | |
| offsetof(ngx_eventport_conf_t, events), | |
| NULL }, | |
| ngx_null_command | |
| }; | |
| ngx_event_module_t ngx_eventport_module_ctx = { | |
| &eventport_name, | |
| ngx_eventport_create_conf, /* create configuration */ | |
| ngx_eventport_init_conf, /* init configuration */ | |
| { | |
| ngx_eventport_add_event, /* add an event */ | |
| ngx_eventport_del_event, /* delete an event */ | |
| ngx_eventport_add_event, /* enable an event */ | |
| ngx_eventport_del_event, /* disable an event */ | |
| NULL, /* add an connection */ | |
| NULL, /* delete an connection */ | |
| NULL, /* process the changes */ | |
| ngx_eventport_process_events, /* process the events */ | |
| ngx_eventport_init, /* init the events */ | |
| ngx_eventport_done, /* done the events */ | |
| } | |
| }; | |
| ngx_module_t ngx_eventport_module = { | |
| NGX_MODULE_V1, | |
| &ngx_eventport_module_ctx, /* module context */ | |
| ngx_eventport_commands, /* module directives */ | |
| NGX_EVENT_MODULE, /* module type */ | |
| NULL, /* init master */ | |
| NULL, /* init module */ | |
| NULL, /* init process */ | |
| NULL, /* init thread */ | |
| NULL, /* exit thread */ | |
| NULL, /* exit process */ | |
| NULL, /* exit master */ | |
| NGX_MODULE_V1_PADDING | |
| }; | |
| static ngx_int_t | |
| ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer) | |
| { | |
| port_notify_t pn; | |
| struct itimerspec its; | |
| struct sigevent sev; | |
| ngx_eventport_conf_t *epcf; | |
| epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module); | |
| if (ep == -1) { | |
| ep = port_create(); | |
| if (ep == -1) { | |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
| "port_create() failed"); | |
| return NGX_ERROR; | |
| } | |
| } | |
| if (nevents < epcf->events) { | |
| if (event_list) { | |
| ngx_free(event_list); | |
| } | |
| event_list = ngx_alloc(sizeof(port_event_t) * epcf->events, | |
| cycle->log); | |
| if (event_list == NULL) { | |
| return NGX_ERROR; | |
| } | |
| } | |
| ngx_event_flags = NGX_USE_EVENTPORT_EVENT; | |
| if (timer) { | |
| ngx_memzero(&pn, sizeof(port_notify_t)); | |
| pn.portnfy_port = ep; | |
| ngx_memzero(&sev, sizeof(struct sigevent)); | |
| sev.sigev_notify = SIGEV_PORT; | |
| #if !(NGX_TEST_BUILD_EVENTPORT) | |
| sev.sigev_value.sival_ptr = &pn; | |
| #endif | |
| if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) { | |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
| "timer_create() failed"); | |
| return NGX_ERROR; | |
| } | |
| its.it_interval.tv_sec = timer / 1000; | |
| its.it_interval.tv_nsec = (timer % 1000) * 1000000; | |
| its.it_value.tv_sec = timer / 1000; | |
| its.it_value.tv_nsec = (timer % 1000) * 1000000; | |
| if (timer_settime(event_timer, 0, &its, NULL) == -1) { | |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, | |
| "timer_settime() failed"); | |
| return NGX_ERROR; | |
| } | |
| ngx_event_flags |= NGX_USE_TIMER_EVENT; | |
| } | |
| nevents = epcf->events; | |
| ngx_io = ngx_os_io; | |
| ngx_event_actions = ngx_eventport_module_ctx.actions; | |
| return NGX_OK; | |
| } | |
| static void | |
| ngx_eventport_done(ngx_cycle_t *cycle) | |
| { | |
| if (event_timer != (timer_t) -1) { | |
| if (timer_delete(event_timer) == -1) { | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
| "timer_delete() failed"); | |
| } | |
| event_timer = (timer_t) -1; | |
| } | |
| if (close(ep) == -1) { | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, | |
| "close() event port failed"); | |
| } | |
| ep = -1; | |
| ngx_free(event_list); | |
| event_list = NULL; | |
| nevents = 0; | |
| } | |
| static ngx_int_t | |
| ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) | |
| { | |
| ngx_int_t events, prev; | |
| ngx_event_t *e; | |
| ngx_connection_t *c; | |
| c = ev->data; | |
| events = event; | |
| if (event == NGX_READ_EVENT) { | |
| e = c->write; | |
| prev = POLLOUT; | |
| #if (NGX_READ_EVENT != POLLIN) | |
| events = POLLIN; | |
| #endif | |
| } else { | |
| e = c->read; | |
| prev = POLLIN; | |
| #if (NGX_WRITE_EVENT != POLLOUT) | |
| events = POLLOUT; | |
| #endif | |
| } | |
| if (e->oneshot) { | |
| events |= prev; | |
| } | |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
| "eventport add event: fd:%d ev:%04Xi", c->fd, events); | |
| if (port_associate(ep, PORT_SOURCE_FD, c->fd, events, | |
| (void *) ((uintptr_t) ev | ev->instance)) | |
| == -1) | |
| { | |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
| "port_associate() failed"); | |
| return NGX_ERROR; | |
| } | |
| ev->active = 1; | |
| ev->oneshot = 1; | |
| return NGX_OK; | |
| } | |
| static ngx_int_t | |
| ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) | |
| { | |
| ngx_event_t *e; | |
| ngx_connection_t *c; | |
| /* | |
| * when the file descriptor is closed, the event port automatically | |
| * dissociates it from the port, so we do not need to dissociate explicity | |
| * the event before the closing the file descriptor | |
| */ | |
| if (flags & NGX_CLOSE_EVENT) { | |
| ev->active = 0; | |
| ev->oneshot = 0; | |
| return NGX_OK; | |
| } | |
| c = ev->data; | |
| if (event == NGX_READ_EVENT) { | |
| e = c->write; | |
| event = POLLOUT; | |
| } else { | |
| e = c->read; | |
| event = POLLIN; | |
| } | |
| if (e->oneshot) { | |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
| "eventport change event: fd:%d ev:%04Xi", c->fd, event); | |
| if (port_associate(ep, PORT_SOURCE_FD, c->fd, event, | |
| (void *) ((uintptr_t) ev | ev->instance)) | |
| == -1) | |
| { | |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
| "port_associate() failed"); | |
| return NGX_ERROR; | |
| } | |
| } else { | |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, | |
| "eventport del event: fd:%d", c->fd); | |
| if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) { | |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
| "port_dissociate() failed"); | |
| return NGX_ERROR; | |
| } | |
| } | |
| ev->active = 0; | |
| ev->oneshot = 0; | |
| return NGX_OK; | |
| } | |
| ngx_int_t | |
| ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, | |
| ngx_uint_t flags) | |
| { | |
| int n, revents; | |
| u_int events; | |
| ngx_err_t err; | |
| ngx_int_t instance; | |
| ngx_uint_t i, level; | |
| ngx_event_t *ev, *rev, *wev, **queue; | |
| ngx_connection_t *c; | |
| struct timespec ts, *tp; | |
| if (timer == NGX_TIMER_INFINITE) { | |
| tp = NULL; | |
| } else { | |
| ts.tv_sec = timer / 1000; | |
| ts.tv_nsec = (timer % 1000) * 1000000; | |
| tp = &ts; | |
| } | |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
| "eventport timer: %M", timer); | |
| events = 1; | |
| n = port_getn(ep, event_list, (u_int) nevents, &events, tp); | |
| err = ngx_errno; | |
| if (flags & NGX_UPDATE_TIME) { | |
| ngx_time_update(0, 0); | |
| } | |
| if (n == -1) { | |
| if (err == ETIME) { | |
| if (timer != NGX_TIMER_INFINITE) { | |
| return NGX_OK; | |
| } | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
| "port_getn() returned no events without timeout"); | |
| return NGX_ERROR; | |
| } | |
| level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT; | |
| ngx_log_error(level, cycle->log, err, "port_getn() failed"); | |
| return NGX_ERROR; | |
| } | |
| if (events == 0) { | |
| if (timer != NGX_TIMER_INFINITE) { | |
| return NGX_OK; | |
| } | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
| "port_getn() returned no events without timeout"); | |
| return NGX_ERROR; | |
| } | |
| ngx_mutex_lock(ngx_posted_events_mutex); | |
| for (i = 0; i < events; i++) { | |
| if (event_list[i].portev_source == PORT_SOURCE_TIMER) { | |
| ngx_time_update(0, 0); | |
| continue; | |
| } | |
| ev = event_list[i].portev_user; | |
| switch (event_list[i].portev_source) { | |
| case PORT_SOURCE_FD: | |
| instance = (uintptr_t) ev & 1; | |
| ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1); | |
| if (ev->closed || ev->instance != instance) { | |
| /* | |
| * the stale event from a file descriptor | |
| * that was just closed in this iteration | |
| */ | |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
| "eventport: stale event %p", ev); | |
| continue; | |
| } | |
| revents = event_list[i].portev_events; | |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
| "eventport: fd:%d, ev:%04Xd", | |
| event_list[i].portev_object, revents); | |
| if (revents & (POLLERR|POLLHUP|POLLNVAL)) { | |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, | |
| "port_getn() error fd:%d ev:%04Xd", | |
| event_list[i].portev_object, revents); | |
| } | |
| if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) { | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
| "strange port_getn() events fd:%d ev:%04Xd", | |
| event_list[i].portev_object, revents); | |
| } | |
| if ((revents & (POLLERR|POLLHUP|POLLNVAL)) | |
| && (revents & (POLLIN|POLLOUT)) == 0) | |
| { | |
| /* | |
| * if the error events were returned without POLLIN or POLLOUT, | |
| * then add these flags to handle the events at least in one | |
| * active handler | |
| */ | |
| revents |= POLLIN|POLLOUT; | |
| } | |
| c = ev->data; | |
| rev = c->read; | |
| wev = c->write; | |
| rev->active = 0; | |
| wev->active = 0; | |
| if (revents & POLLIN) { | |
| if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) { | |
| rev->posted_ready = 1; | |
| } else { | |
| rev->ready = 1; | |
| } | |
| if (flags & NGX_POST_EVENTS) { | |
| queue = (ngx_event_t **) (rev->accept ? | |
| &ngx_posted_accept_events : &ngx_posted_events); | |
| ngx_locked_post_event(rev, queue); | |
| } else { | |
| rev->handler(rev); | |
| if (ev->closed) { | |
| continue; | |
| } | |
| } | |
| if (rev->accept) { | |
| if (ngx_use_accept_mutex) { | |
| ngx_accept_events = 1; | |
| continue; | |
| } | |
| if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN, | |
| (void *) ((uintptr_t) ev | ev->instance)) | |
| == -1) | |
| { | |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, | |
| "port_associate() failed"); | |
| return NGX_ERROR; | |
| } | |
| } | |
| } | |
| if (revents & POLLOUT) { | |
| if (flags & NGX_POST_THREAD_EVENTS) { | |
| wev->posted_ready = 1; | |
| } else { | |
| wev->ready = 1; | |
| } | |
| if (flags & NGX_POST_EVENTS) { | |
| ngx_locked_post_event(wev, &ngx_posted_events); | |
| } else { | |
| wev->handler(wev); | |
| } | |
| } | |
| continue; | |
| default: | |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
| "unexpected even_port object %d", | |
| event_list[i].portev_object); | |
| continue; | |
| } | |
| } | |
| ngx_mutex_unlock(ngx_posted_events_mutex); | |
| return NGX_OK; | |
| } | |
| static void * | |
| ngx_eventport_create_conf(ngx_cycle_t *cycle) | |
| { | |
| ngx_eventport_conf_t *epcf; | |
| epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t)); | |
| if (epcf == NULL) { | |
| return NGX_CONF_ERROR; | |
| } | |
| epcf->events = NGX_CONF_UNSET; | |
| return epcf; | |
| } | |
| static char * | |
| ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf) | |
| { | |
| ngx_eventport_conf_t *epcf = conf; | |
| ngx_conf_init_uint_value(epcf->events, 32); | |
| return NGX_CONF_OK; | |
| } |