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