diff options
Diffstat (limited to 'app/nginx/src/event/modules/ngx_eventport_module.c')
| -rw-r--r-- | app/nginx/src/event/modules/ngx_eventport_module.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/app/nginx/src/event/modules/ngx_eventport_module.c b/app/nginx/src/event/modules/ngx_eventport_module.c new file mode 100644 index 0000000..e723f92 --- /dev/null +++ b/app/nginx/src/event/modules/ngx_eventport_module.c @@ -0,0 +1,649 @@ + +/* + * 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; +#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; +#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 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 { + 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; + + 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; +} |