PAL.C.T MINI SHELL
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2015 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Jerome Loyet <jerome@loyet.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "../fpm_config.h"
#include "../fpm_events.h"
#include "../fpm.h"
#include "../zlog.h"
#if HAVE_KQUEUE
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <errno.h>
static int fpm_event_kqueue_init(int max);
static int fpm_event_kqueue_clean();
static int fpm_event_kqueue_wait(struct fpm_event_queue_s *queue, unsigned long int timeout);
static int fpm_event_kqueue_add(struct fpm_event_s *ev);
static int fpm_event_kqueue_remove(struct fpm_event_s *ev);
static struct fpm_event_module_s kqueue_module = {
.name = "kqueue",
.support_edge_trigger = 1,
.init = fpm_event_kqueue_init,
.clean = fpm_event_kqueue_clean,
.wait = fpm_event_kqueue_wait,
.add = fpm_event_kqueue_add,
.remove = fpm_event_kqueue_remove,
};
static struct kevent *kevents = NULL;
static int nkevents = 0;
static int kfd = 0;
#endif /* HAVE_KQUEUE */
/*
* Return the module configuration
*/
struct fpm_event_module_s *fpm_event_kqueue_module() /* {{{ */
{
#if HAVE_KQUEUE
return &kqueue_module;
#else
return NULL;
#endif /* HAVE_KQUEUE */
}
/* }}} */
#if HAVE_KQUEUE
/*
* init kqueue and stuff
*/
static int fpm_event_kqueue_init(int max) /* {{{ */
{
if (max < 1) {
return 0;
}
kfd = kqueue();
if (kfd < 0) {
zlog(ZLOG_ERROR, "kqueue: unable to initialize");
return -1;
}
kevents = malloc(sizeof(struct kevent) * max);
if (!kevents) {
zlog(ZLOG_ERROR, "epoll: unable to allocate %d events", max);
return -1;
}
memset(kevents, 0, sizeof(struct kevent) * max);
nkevents = max;
return 0;
}
/* }}} */
/*
* release kqueue stuff
*/
static int fpm_event_kqueue_clean() /* {{{ */
{
if (kevents) {
free(kevents);
kevents = NULL;
}
nkevents = 0;
return 0;
}
/* }}} */
/*
* wait for events or timeout
*/
static int fpm_event_kqueue_wait(struct fpm_event_queue_s *queue, unsigned long int timeout) /* {{{ */
{
struct timespec t;
int ret, i;
/* ensure we have a clean kevents before calling kevent() */
memset(kevents, 0, sizeof(struct kevent) * nkevents);
/* convert ms to timespec struct */
t.tv_sec = timeout / 1000;
t.tv_nsec = (timeout % 1000) * 1000 * 1000;
/* wait for incoming event or timeout */
ret = kevent(kfd, NULL, 0, kevents, nkevents, &t);
if (ret == -1) {
/* trigger error unless signal interrupt */
if (errno != EINTR) {
zlog(ZLOG_WARNING, "epoll_wait() returns %d", errno);
return -1;
}
}
/* fire triggered events */
for (i = 0; i < ret; i++) {
if (kevents[i].udata) {
struct fpm_event_s *ev = (struct fpm_event_s *)kevents[i].udata;
fpm_event_fire(ev);
/* sanity check */
if (fpm_globals.parent_pid != getpid()) {
return -2;
}
}
}
return ret;
}
/* }}} */
/*
* Add a FD to to kevent queue
*/
static int fpm_event_kqueue_add(struct fpm_event_s *ev) /* {{{ */
{
struct kevent k;
int flags = EV_ADD;
if (ev->flags & FPM_EV_EDGE) {
flags = flags | EV_CLEAR;
}
EV_SET(&k, ev->fd, EVFILT_READ, flags, 0, 0, (void *)ev);
if (kevent(kfd, &k, 1, NULL, 0, NULL) < 0) {
zlog(ZLOG_ERROR, "kevent: unable to add event");
return -1;
}
/* mark the event as registered */
ev->index = ev->fd;
return 0;
}
/* }}} */
/*
* Remove a FD from the kevent queue
*/
static int fpm_event_kqueue_remove(struct fpm_event_s *ev) /* {{{ */
{
struct kevent k;
int flags = EV_DELETE;
if (ev->flags & FPM_EV_EDGE) {
flags = flags | EV_CLEAR;
}
EV_SET(&k, ev->fd, EVFILT_READ, flags, 0, 0, (void *)ev);
if (kevent(kfd, &k, 1, NULL, 0, NULL) < 0) {
zlog(ZLOG_ERROR, "kevent: unable to add event");
return -1;
}
/* mark the vent as not registered */
ev->index = -1;
return 0;
}
/* }}} */
#endif /* HAVE_KQUEUE */
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