| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #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 |
| |
| #ifndef CLOCK_REALTIME |
| #define CLOCK_REALTIME 0 |
| typedef int clockid_t; |
| typedef void * timer_t; |
| #elif (NGX_DARWIN) |
| typedef void * timer_t; |
| #endif |
| |
| /* 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 |
| |
| #ifndef ETIME |
| #define ETIME 64 |
| #endif |
| |
| #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__ && __FreeBSD_version < 700005) || (NGX_DARWIN) |
| |
| 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); |
| |
| int port_create(void) |
| { |
| return -1; |
| } |
| |
| |
| int port_associate(int port, int source, uintptr_t object, int events, |
| void *user); |
| |
| 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); |
| |
| 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); |
| |
| int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, |
| struct timespec *timeout) |
| { |
| return -1; |
| } |
| |
| int port_send(int port, int events, void *user); |
| |
| int port_send(int port, int events, void *user) |
| { |
| return -1; |
| } |
| |
| |
| int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid); |
| |
| 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); |
| |
| int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, |
| struct itimerspec *ovalue) |
| { |
| return -1; |
| } |
| |
| |
| int timer_delete(timer_t timerid); |
| |
| 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_notify(ngx_event_handler_pt handler); |
| 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_event_t notify_event; |
| |
| 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 |
| }; |
| |
| |
| static 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 */ |
| ngx_eventport_notify, /* trigger a notify */ |
| 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; |
| } |
| |
| notify_event.active = 1; |
| notify_event.log = cycle->log; |
| } |
| |
| 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; |
| sev.sigev_value.sival_ptr = &pn; |
| |
| 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 explicitly |
| * 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 if (ev->active) { |
| 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; |
| } |
| |
| |
| static ngx_int_t |
| ngx_eventport_notify(ngx_event_handler_pt handler) |
| { |
| notify_event.handler = handler; |
| |
| if (port_send(ep, 0, ¬ify_event) != 0) { |
| ngx_log_error(NGX_LOG_ALERT, notify_event.log, ngx_errno, |
| "port_send() failed"); |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static 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; |
| ngx_queue_t *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(); |
| } |
| |
| 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; |
| } |
| |
| for (i = 0; i < events; i++) { |
| |
| if (event_list[i].portev_source == PORT_SOURCE_TIMER) { |
| ngx_time_update(); |
| 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", |
| (int) 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", |
| (int) 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", |
| (int) event_list[i].portev_object, revents); |
| } |
| |
| if (revents & (POLLERR|POLLHUP|POLLNVAL)) { |
| |
| /* |
| * if the error events were returned, add POLLIN and POLLOUT |
| * 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) { |
| rev->ready = 1; |
| rev->available = -1; |
| |
| if (flags & NGX_POST_EVENTS) { |
| queue = rev->accept ? &ngx_posted_accept_events |
| : &ngx_posted_events; |
| |
| ngx_post_event(rev, queue); |
| |
| } else { |
| rev->handler(rev); |
| |
| if (ev->closed || ev->instance != instance) { |
| 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) { |
| wev->ready = 1; |
| |
| if (flags & NGX_POST_EVENTS) { |
| ngx_post_event(wev, &ngx_posted_events); |
| |
| } else { |
| wev->handler(wev); |
| } |
| } |
| |
| continue; |
| |
| case PORT_SOURCE_USER: |
| |
| ev->handler(ev); |
| |
| continue; |
| |
| default: |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "unexpected eventport object %d", |
| (int) event_list[i].portev_object); |
| continue; |
| } |
| } |
| |
| 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 NULL; |
| } |
| |
| 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; |
| } |
