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/*
* 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;
}
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