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DEFINITIONS
This source file includes following definitions.
- get_epoll_event
- get_epoll_revent
- backend_cleanup
- APR_DECLARE
- APR_DECLARE
- APR_DECLARE
- APR_DECLARE
- APR_DECLARE
- cb_cleanup
- APR_DECLARE
- APR_DECLARE
- APR_DECLARE
- APR_DECLARE
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr_arch_poll_private.h"
#ifdef POLLSET_USES_EPOLL
static apr_int16_t get_epoll_event(apr_int16_t event)
{
apr_int16_t rv = 0;
if (event & APR_POLLIN)
rv |= EPOLLIN;
if (event & APR_POLLPRI)
rv |= EPOLLPRI;
if (event & APR_POLLOUT)
rv |= EPOLLOUT;
if (event & APR_POLLERR)
rv |= EPOLLERR;
if (event & APR_POLLHUP)
rv |= EPOLLHUP;
/* APR_POLLNVAL is not handled by epoll. */
return rv;
}
static apr_int16_t get_epoll_revent(apr_int16_t event)
{
apr_int16_t rv = 0;
if (event & EPOLLIN)
rv |= APR_POLLIN;
if (event & EPOLLPRI)
rv |= APR_POLLPRI;
if (event & EPOLLOUT)
rv |= APR_POLLOUT;
if (event & EPOLLERR)
rv |= APR_POLLERR;
if (event & EPOLLHUP)
rv |= APR_POLLHUP;
/* APR_POLLNVAL is not handled by epoll. */
return rv;
}
struct apr_pollset_t
{
apr_pool_t *pool;
apr_uint32_t nelts;
apr_uint32_t nalloc;
int epoll_fd;
struct epoll_event *pollset;
apr_pollfd_t *result_set;
apr_uint32_t flags;
#if APR_HAS_THREADS
/* A thread mutex to protect operations on the rings */
apr_thread_mutex_t *ring_lock;
#endif
/* A ring containing all of the pollfd_t that are active */
APR_RING_HEAD(pfd_query_ring_t, pfd_elem_t) query_ring;
/* A ring of pollfd_t that have been used, and then _remove()'d */
APR_RING_HEAD(pfd_free_ring_t, pfd_elem_t) free_ring;
/* A ring of pollfd_t where rings that have been _remove()`ed but
might still be inside a _poll() */
APR_RING_HEAD(pfd_dead_ring_t, pfd_elem_t) dead_ring;
};
static apr_status_t backend_cleanup(void *p_)
{
apr_pollset_t *pollset = (apr_pollset_t *) p_;
close(pollset->epoll_fd);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollset_create(apr_pollset_t **pollset,
apr_uint32_t size,
apr_pool_t *p,
apr_uint32_t flags)
{
apr_status_t rv;
int fd;
fd = epoll_create(size);
if (fd < 0) {
*pollset = NULL;
return errno;
}
*pollset = apr_palloc(p, sizeof(**pollset));
#if APR_HAS_THREADS
if ((flags & APR_POLLSET_THREADSAFE) &&
!(flags & APR_POLLSET_NOCOPY) &&
((rv = apr_thread_mutex_create(&(*pollset)->ring_lock,
APR_THREAD_MUTEX_DEFAULT,
p)) != APR_SUCCESS)) {
*pollset = NULL;
return rv;
}
#else
if (flags & APR_POLLSET_THREADSAFE) {
*pollset = NULL;
return APR_ENOTIMPL;
}
#endif
(*pollset)->nelts = 0;
(*pollset)->nalloc = size;
(*pollset)->flags = flags;
(*pollset)->pool = p;
(*pollset)->epoll_fd = fd;
(*pollset)->pollset = apr_palloc(p, size * sizeof(struct epoll_event));
apr_pool_cleanup_register(p, *pollset, backend_cleanup, backend_cleanup);
(*pollset)->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
if (!(flags & APR_POLLSET_NOCOPY)) {
APR_RING_INIT(&(*pollset)->query_ring, pfd_elem_t, link);
APR_RING_INIT(&(*pollset)->free_ring, pfd_elem_t, link);
APR_RING_INIT(&(*pollset)->dead_ring, pfd_elem_t, link);
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t *pollset)
{
return apr_pool_cleanup_run(pollset->pool, pollset, backend_cleanup);
}
APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset,
const apr_pollfd_t *descriptor)
{
struct epoll_event ev = {0};
int ret = -1;
pfd_elem_t *elem = NULL;
apr_status_t rv = APR_SUCCESS;
ev.events = get_epoll_event(descriptor->reqevents);
if (pollset->flags & APR_POLLSET_NOCOPY) {
ev.data.ptr = (void *)descriptor;
}
else {
pollset_lock_rings();
if (!APR_RING_EMPTY(&(pollset->free_ring), pfd_elem_t, link)) {
elem = APR_RING_FIRST(&(pollset->free_ring));
APR_RING_REMOVE(elem, link);
}
else {
elem = (pfd_elem_t *) apr_palloc(pollset->pool, sizeof(pfd_elem_t));
APR_RING_ELEM_INIT(elem, link);
}
elem->pfd = *descriptor;
ev.data.ptr = elem;
}
if (descriptor->desc_type == APR_POLL_SOCKET) {
ret = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
descriptor->desc.s->socketdes, &ev);
}
else {
ret = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
descriptor->desc.f->filedes, &ev);
}
if (pollset->flags & APR_POLLSET_NOCOPY) {
if (0 != ret) {
rv = APR_EBADF;
}
}
else {
if (0 != ret) {
rv = APR_EBADF;
APR_RING_INSERT_TAIL(&(pollset->free_ring), elem, pfd_elem_t, link);
}
else {
pollset->nelts++;
APR_RING_INSERT_TAIL(&(pollset->query_ring), elem, pfd_elem_t, link);
}
pollset_unlock_rings();
}
return rv;
}
APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t *pollset,
const apr_pollfd_t *descriptor)
{
pfd_elem_t *ep;
apr_status_t rv = APR_SUCCESS;
struct epoll_event ev;
int ret = -1;
ev.events = get_epoll_event(descriptor->reqevents);
if (descriptor->desc_type == APR_POLL_SOCKET) {
ret = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_DEL,
descriptor->desc.s->socketdes, &ev);
}
else {
ret = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_DEL,
descriptor->desc.f->filedes, &ev);
}
if (ret < 0) {
rv = APR_NOTFOUND;
}
if (!(pollset->flags & APR_POLLSET_NOCOPY)) {
pollset_lock_rings();
if (!APR_RING_EMPTY(&(pollset->query_ring), pfd_elem_t, link)) {
for (ep = APR_RING_FIRST(&(pollset->query_ring));
ep != APR_RING_SENTINEL(&(pollset->query_ring),
pfd_elem_t, link);
ep = APR_RING_NEXT(ep, link)) {
if (descriptor->desc.s == ep->pfd.desc.s) {
APR_RING_REMOVE(ep, link);
APR_RING_INSERT_TAIL(&(pollset->dead_ring),
ep, pfd_elem_t, link);
break;
}
}
}
pollset_unlock_rings();
}
return rv;
}
APR_DECLARE(apr_status_t) apr_pollset_poll(apr_pollset_t *pollset,
apr_interval_time_t timeout,
apr_int32_t *num,
const apr_pollfd_t **descriptors)
{
int ret, i;
apr_status_t rv = APR_SUCCESS;
if (timeout > 0) {
timeout /= 1000;
}
ret = epoll_wait(pollset->epoll_fd, pollset->pollset, pollset->nalloc,
timeout);
(*num) = ret;
if (ret < 0) {
rv = apr_get_netos_error();
}
else if (ret == 0) {
rv = APR_TIMEUP;
}
else {
if (pollset->flags & APR_POLLSET_NOCOPY) {
for (i = 0; i < ret; i++) {
pollset->result_set[i] =
*((apr_pollfd_t *) (pollset->pollset[i].data.ptr));
pollset->result_set[i].rtnevents =
get_epoll_revent(pollset->pollset[i].events);
}
}
else {
for (i = 0; i < ret; i++) {
pollset->result_set[i] =
(((pfd_elem_t *) (pollset->pollset[i].data.ptr))->pfd);
pollset->result_set[i].rtnevents =
get_epoll_revent(pollset->pollset[i].events);
}
}
if (descriptors) {
*descriptors = pollset->result_set;
}
}
if (!(pollset->flags & APR_POLLSET_NOCOPY)) {
pollset_lock_rings();
/* Shift all PFDs in the Dead Ring to be Free Ring */
APR_RING_CONCAT(&(pollset->free_ring), &(pollset->dead_ring), pfd_elem_t, link);
pollset_unlock_rings();
}
return rv;
}
struct apr_pollcb_t {
apr_pool_t *pool;
apr_uint32_t nalloc;
struct epoll_event *pollset;
int epoll_fd;
};
static apr_status_t cb_cleanup(void *p_)
{
apr_pollcb_t *pollcb = (apr_pollcb_t *) p_;
close(pollcb->epoll_fd);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollcb_create(apr_pollcb_t **pollcb,
apr_uint32_t size,
apr_pool_t *p,
apr_uint32_t flags)
{
int fd;
fd = epoll_create(size);
if (fd < 0) {
*pollcb = NULL;
return apr_get_netos_error();
}
*pollcb = apr_palloc(p, sizeof(**pollcb));
(*pollcb)->nalloc = size;
(*pollcb)->pool = p;
(*pollcb)->epoll_fd = fd;
(*pollcb)->pollset = apr_palloc(p, size * sizeof(struct epoll_event));
apr_pool_cleanup_register(p, *pollcb, cb_cleanup, cb_cleanup);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollcb_add(apr_pollcb_t *pollcb,
apr_pollfd_t *descriptor)
{
struct epoll_event ev;
int ret;
ev.events = get_epoll_event(descriptor->reqevents);
ev.data.ptr = (void *)descriptor;
if (descriptor->desc_type == APR_POLL_SOCKET) {
ret = epoll_ctl(pollcb->epoll_fd, EPOLL_CTL_ADD,
descriptor->desc.s->socketdes, &ev);
}
else {
ret = epoll_ctl(pollcb->epoll_fd, EPOLL_CTL_ADD,
descriptor->desc.f->filedes, &ev);
}
if (ret == -1) {
return apr_get_netos_error();
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollcb_remove(apr_pollcb_t *pollcb,
apr_pollfd_t *descriptor)
{
apr_status_t rv = APR_SUCCESS;
struct epoll_event ev;
int ret = -1;
ev.events = get_epoll_event(descriptor->reqevents);
if (descriptor->desc_type == APR_POLL_SOCKET) {
ret = epoll_ctl(pollcb->epoll_fd, EPOLL_CTL_DEL,
descriptor->desc.s->socketdes, &ev);
}
else {
ret = epoll_ctl(pollcb->epoll_fd, EPOLL_CTL_DEL,
descriptor->desc.f->filedes, &ev);
}
if (ret < 0) {
rv = APR_NOTFOUND;
}
return rv;
}
APR_DECLARE(apr_status_t) apr_pollcb_poll(apr_pollcb_t *pollcb,
apr_interval_time_t timeout,
apr_pollcb_cb_t func,
void *baton)
{
int ret, i;
apr_status_t rv = APR_SUCCESS;
if (timeout > 0) {
timeout /= 1000;
}
ret = epoll_wait(pollcb->epoll_fd, pollcb->pollset, pollcb->nalloc,
timeout);
if (ret < 0) {
rv = apr_get_netos_error();
}
else if (ret == 0) {
rv = APR_TIMEUP;
}
else {
for (i = 0; i < ret; i++) {
apr_pollfd_t *pollfd = (apr_pollfd_t *)(pollcb->pollset[i].data.ptr);
pollfd->rtnevents = get_epoll_revent(pollcb->pollset[i].events);
rv = func(baton, pollfd);
if (rv) {
return rv;
}
}
}
return rv;
}
#endif /* POLLSET_USES_EPOLL */