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|
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 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> |
+----------------------------------------------------------------------+
*/
#include "../fpm_config.h"
#include "../fpm_events.h"
#include "../fpm.h"
#include "../zlog.h"
#if HAVE_DEVPOLL
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <poll.h>
#include <sys/devpoll.h>
#include <errno.h>
static int fpm_event_devpoll_init(int max);
static int fpm_event_devpoll_clean();
static int fpm_event_devpoll_wait(struct fpm_event_queue_s *queue, unsigned long int timeout);
static int fpm_event_devpoll_add(struct fpm_event_s *ev);
static int fpm_event_devpoll_remove(struct fpm_event_s *ev);
static struct fpm_event_module_s devpoll_module = {
.name = "/dev/poll",
.support_edge_trigger = 0,
.init = fpm_event_devpoll_init,
.clean = fpm_event_devpoll_clean,
.wait = fpm_event_devpoll_wait,
.add = fpm_event_devpoll_add,
.remove = fpm_event_devpoll_remove,
};
int dpfd = -1;
static struct pollfd *pollfds = NULL;
static struct pollfd *active_pollfds = NULL;
static int npollfds = 0;
#endif /* HAVE_DEVPOLL */
struct fpm_event_module_s *fpm_event_devpoll_module() /* {{{ */
{
#if HAVE_DEVPOLL
return &devpoll_module;
#else
return NULL;
#endif /* HAVE_DEVPOLL */
}
/* }}} */
#if HAVE_DEVPOLL
/*
* Init module
*/
static int fpm_event_devpoll_init(int max) /* {{{ */
{
int i;
/* open /dev/poll for future usages */
dpfd = open("/dev/poll", O_RDWR);
if (dpfd < 0) {
zlog(ZLOG_ERROR, "Unable to open /dev/poll");
return -1;
}
if (max < 1) {
return 0;
}
/* alloc and clear pollfds */
pollfds = malloc(sizeof(struct pollfd) * max);
if (!pollfds) {
zlog(ZLOG_ERROR, "poll: unable to allocate %d events", max);
return -1;
}
memset(pollfds, 0, sizeof(struct pollfd) * max);
/* set all fd to -1 in order to ensure it's not set */
for (i = 0; i < max; i++) {
pollfds[i].fd = -1;
}
/* alloc and clear active_pollfds */
active_pollfds = malloc(sizeof(struct pollfd) * max);
if (!active_pollfds) {
free(pollfds);
zlog(ZLOG_ERROR, "poll: unable to allocate %d events", max);
return -1;
}
memset(active_pollfds, 0, sizeof(struct pollfd) * max);
/* save max */
npollfds = max;
return 0;
}
/* }}} */
/*
* Clean the module
*/
static int fpm_event_devpoll_clean() /* {{{ */
{
/* close /dev/poll if open */
if (dpfd > -1) {
close(dpfd);
dpfd = -1;
}
/* free pollfds */
if (pollfds) {
free(pollfds);
pollfds = NULL;
}
/* free active_pollfds */
if (active_pollfds) {
free(active_pollfds);
active_pollfds = NULL;
}
npollfds = 0;
return 0;
}
/* }}} */
/*
* wait for events or timeout
*/
static int fpm_event_devpoll_wait(struct fpm_event_queue_s *queue, unsigned long int timeout) /* {{{ */
{
int ret, i;
struct fpm_event_queue_s *q;
struct dvpoll dopoll;
/* setup /dev/poll */
dopoll.dp_fds = active_pollfds;
dopoll.dp_nfds = npollfds;
dopoll.dp_timeout = (int)timeout;
/* wait for inconming event or timeout */
ret = ioctl(dpfd, DP_POLL, &dopoll);
if (ret < 0) {
/* trigger error unless signal interrupt */
if (errno != EINTR) {
zlog(ZLOG_WARNING, "/dev/poll: ioctl() returns %d", errno);
return -1;
}
}
/* iterate through triggered events */
for (i = 0; i < ret; i++) {
/* find the corresponding event */
q = queue;
while (q) {
/* found */
if (q->ev && q->ev->fd == active_pollfds[i].fd) {
/* fire the event */
fpm_event_fire(q->ev);
/* sanity check */
if (fpm_globals.parent_pid != getpid()) {
return -2;
}
break; /* next triggered event */
}
q = q->next; /* iterate */
}
}
return ret;
}
/* }}} */
/*
* Add a FD from the fd set
*/
static int fpm_event_devpoll_add(struct fpm_event_s *ev) /* {{{ */
{
struct pollfd pollfd;
/* fill pollfd with event information */
pollfd.fd = ev->fd;
pollfd.events = POLLIN;
pollfd.revents = 0;
/* add the event to the internal queue */
if (write(dpfd, &pollfd, sizeof(struct pollfd)) != sizeof(struct pollfd)) {
zlog(ZLOG_ERROR, "/dev/poll: Unable to add the event in the internal queue");
return -1;
}
/* mark the event as registered */
ev->index = ev->fd;
return 0;
}
/* }}} */
/*
* Remove a FD from the fd set
*/
static int fpm_event_devpoll_remove(struct fpm_event_s *ev) /* {{{ */
{
struct pollfd pollfd;
/* fill pollfd with the same information as fpm_event_devpoll_add */
pollfd.fd = ev->fd;
pollfd.events = POLLIN | POLLREMOVE;
pollfd.revents = 0;
/* add the event to the internal queue */
if (write(dpfd, &pollfd, sizeof(struct pollfd)) != sizeof(struct pollfd)) {
zlog(ZLOG_ERROR, "/dev/poll: Unable to remove the event in the internal queue");
return -1;
}
/* mark the event as registered */
ev->index = -1;
return 0;
}
/* }}} */
#endif /* HAVE_DEVPOLL */
|
