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/*
* Copyright (C) 2002 Igor Sysoev, http://sysoev.ru
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_types.h>
#include <ngx_log.h>
#include <ngx_connection.h>
#include <ngx_event.h>
#include <ngx_kqueue_module.h>
#if (USE_KQUEUE) && !(HAVE_KQUEUE)
#error "kqueue is not supported on this platform"
#endif
/* should be per-thread */
static int kq;
static struct kevent *change_list, *event_list;
static int nchanges, nevents;
static ngx_event_t timer_queue;
/* */
int ngx_kqueue_init(int max_connections, ngx_log_t *log)
{
int size = sizeof(struct kevent) * 512;
nchanges = 0;
nevents = 512;
kq = kqueue();
if (kq == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "kqueue() failed");
return NGX_ERROR;
}
ngx_test_null(change_list, ngx_alloc(size, log), NGX_ERROR);
ngx_test_null(event_list, ngx_alloc(size, log), NGX_ERROR);
timer_queue.timer_prev = &timer_queue;
timer_queue.timer_next = &timer_queue;
#if !(USE_KQUEUE)
ngx_event_actions.add = ngx_kqueue_add_event;
ngx_event_actions.del = ngx_kqueue_del_event;
ngx_event_actions.timer = ngx_kqueue_add_timer;
ngx_event_actions.process = ngx_kqueue_process_events;
#endif
return NGX_OK;
}
int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags)
{
ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1: 0;
return ngx_kqueue_set_event(ev, event, EV_ADD | flags);
}
int ngx_kqueue_del_event(ngx_event_t *ev, int event, u_int flags)
{
ngx_event_t *e;
if (ev->index < nchanges && change_list[ev->index].udata == ev) {
ngx_connection_t *cn = (ngx_connection_t *) ev->data;
ngx_log_debug(ev->log, "kqueue del event: %d: ft:%d" _
cn->fd _ event);
if (ev->index < --nchanges) {
e = (ngx_event_t *) change_list[nchanges].udata;
change_list[ev->index] = change_list[nchanges];
e->index = ev->index;
}
return NGX_OK;
}
if (flags & NGX_CLOSE_EVENT)
return NGX_OK;
return ngx_kqueue_set_event(ev, event, EV_DELETE);
}
int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags)
{
struct timespec ts = { 0, 0 };
ngx_connection_t *cn = (ngx_connection_t *) ev->data;
ngx_log_debug(ev->log, "kqueue set event: %d: ft:%d f:%08x" _
cn->fd _ filter _ flags);
if (nchanges >= nevents) {
ngx_log_error(NGX_LOG_WARN, ev->log, 0,
"kqueue change list is filled up");
if (kevent(kq, change_list, nchanges, NULL, 0, &ts) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "kevent failed");
return NGX_ERROR;
}
nchanges = 0;
}
change_list[nchanges].ident = cn->fd;
change_list[nchanges].filter = filter;
change_list[nchanges].flags = flags;
change_list[nchanges].fflags = 0;
change_list[nchanges].data = 0;
change_list[nchanges].udata = ev;
if (flags == EV_ADD)
ev->index = nchanges;
nchanges++;
return NGX_OK;
}
int ngx_kqueue_process_events(ngx_log_t *log)
{
int events, i;
u_int timer, delta;
ngx_event_t *ev;
struct timeval tv;
struct timespec ts, *tp;
timer = 0;
delta = 0;
tp = NULL;
if (timer_queue.timer_next != &timer_queue) {
timer = timer_queue.timer_next->timer_delta;
ts.tv_sec = timer / 1000;
ts.tv_nsec = (timer % 1000) * 1000000;
tp = &ts;
gettimeofday(&tv, NULL);
delta = tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
ngx_log_debug(log, "kevent timer: %d" _ timer);
events = kevent(kq, change_list, nchanges, event_list, nevents, tp);
if (events == -1) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "kevent failed");
return NGX_ERROR;
}
nchanges = 0;
if (timer) {
gettimeofday(&tv, NULL);
delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta;
} else {
ngx_assert((events != 0), return NGX_ERROR, log,
"kevent returns no events without timeout");
}
ngx_log_debug(log, "kevent timer: %d, delta: %d" _ timer _ delta);
if (timer) {
if (delta >= timer) {
for ( ;; ) {
ev = timer_queue.timer_next;
if (ev == &timer_queue || delta < ev->timer_delta)
break;
delta -= ev->timer_delta;
ngx_del_timer(ev);
ev->timedout = 1;
if (ev->event_handler(ev) == NGX_ERROR)
ev->close_handler(ev);
}
} else {
timer_queue.timer_next->timer_delta -= delta;
}
}
for (i = 0; i < events; i++) {
ngx_log_debug(log, "kevent: %d: ft:%d f:%08x ff:%08x d:%d ud:%08x" _
event_list[i].ident _ event_list[i].filter _
event_list[i].flags _ event_list[i].fflags _
event_list[i].data _ event_list[i].udata);
if (event_list[i].flags & EV_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, event_list[i].data,
"kevent error on %d", event_list[i].ident);
continue;
}
ev = (ngx_event_t *) event_list[i].udata;
switch (event_list[i].filter) {
case EVFILT_READ:
case EVFILT_WRITE:
ev->ready = 1;
ev->available = event_list[i].data;
if (event_list[i].flags & EV_EOF) {
ev->eof = 1;
ev->error = event_list[i].fflags;
}
if (ev->oneshot)
ngx_del_timer(ev);
if (ev->event_handler(ev) == NGX_ERROR)
ev->close_handler(ev);
break;
default:
ngx_assert(0, /* void */, log,
"unknown kevent filter %d" _ event_list[i].filter);
}
}
return NGX_OK;
}
void ngx_kqueue_add_timer(ngx_event_t *ev, ngx_msec_t timer)
{
ngx_event_t *e;
ngx_log_debug(ev->log, "set timer: %d" _ timer);
ngx_assert((!ev->timer_next && !ev->timer_prev), return, ev->log,
"timer already set");
for (e = timer_queue.timer_next;
e != &timer_queue && timer > e->timer_delta;
e = e->timer_next)
timer -= e->timer_delta;
ev->timer_delta = timer;
ev->timer_next = e;
ev->timer_prev = e->timer_prev;
e->timer_prev->timer_next = ev;
e->timer_prev = ev;
}
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