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src/event/modules/ngx_eventport_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Macros defined
Source code
- #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;
- #endif
- #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;
- ushort_t portev_source;
- ushort_t portev_pad;
- uintptr_t portev_object;
- void *portev_user;
- } port_event_t;
- typedef struct port_notify {
- int portnfy_port;
- void *portnfy_user;
- } port_notify_t;
- #if (__FreeBSD_version < 700005)
- typedef struct itimerspec {
- struct timespec it_interval;
- struct timespec it_value;
- } 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 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_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,
- ngx_eventport_init_conf,
- {
- ngx_eventport_add_event,
- ngx_eventport_del_event,
- ngx_eventport_add_event,
- ngx_eventport_del_event,
- NULL,
- NULL,
- NULL,
- ngx_eventport_process_events,
- ngx_eventport_init,
- ngx_eventport_done,
- }
- };
- ngx_module_t ngx_eventport_module = {
- NGX_MODULE_V1,
- &ngx_eventport_module_ctx,
- ngx_eventport_commands,
- NGX_EVENT_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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;
-
- 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;
- 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) {
-
- 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)
- {
-
- revents |= POLLIN|POLLOUT;
- }
- c = ev->data;
- rev = c->read;
- wev = c->write;
- rev->active = 0;
- wev->active = 0;
- if (revents & POLLIN) {
- rev->ready = 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;
- default:
- ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
- "unexpected even_port object %d",
- 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;
- }
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