498 lines
14 KiB
C
498 lines
14 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr.h"
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#include "apr_poll.h"
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#include "apr_time.h"
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#include "apr_portable.h"
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#include "apr_arch_file_io.h"
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#include "apr_arch_networkio.h"
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#include "apr_arch_poll_private.h"
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#include "apr_arch_inherit.h"
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#ifdef HAVE_KQUEUE
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static apr_int16_t get_kqueue_revent(apr_int16_t event, apr_int16_t flags)
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{
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apr_int16_t rv = 0;
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if (event == EVFILT_READ)
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rv |= APR_POLLIN;
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else if (event == EVFILT_WRITE)
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rv |= APR_POLLOUT;
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if (flags & EV_EOF)
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rv |= APR_POLLHUP;
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/* APR_POLLPRI, APR_POLLERR, and APR_POLLNVAL are not handled by this
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* implementation.
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* TODO: See if EV_ERROR + certain system errors in the returned data field
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* should map to APR_POLLNVAL.
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*/
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return rv;
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}
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struct apr_pollset_private_t
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{
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int kqueue_fd;
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struct kevent kevent;
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apr_uint32_t setsize;
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struct kevent *ke_set;
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apr_pollfd_t *result_set;
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#if APR_HAS_THREADS
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/* A thread mutex to protect operations on the rings */
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apr_thread_mutex_t *ring_lock;
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#endif
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/* A ring containing all of the pollfd_t that are active */
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APR_RING_HEAD(pfd_query_ring_t, pfd_elem_t) query_ring;
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/* A ring of pollfd_t that have been used, and then _remove'd */
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APR_RING_HEAD(pfd_free_ring_t, pfd_elem_t) free_ring;
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/* A ring of pollfd_t where rings that have been _remove'd but
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might still be inside a _poll */
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APR_RING_HEAD(pfd_dead_ring_t, pfd_elem_t) dead_ring;
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};
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static apr_status_t impl_pollset_cleanup(apr_pollset_t *pollset)
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{
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close(pollset->p->kqueue_fd);
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return APR_SUCCESS;
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}
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static apr_status_t impl_pollset_create(apr_pollset_t *pollset,
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apr_uint32_t size,
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apr_pool_t *p,
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apr_uint32_t flags)
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{
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apr_status_t rv;
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pollset->p = apr_palloc(p, sizeof(apr_pollset_private_t));
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#if APR_HAS_THREADS
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if (flags & APR_POLLSET_THREADSAFE &&
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((rv = apr_thread_mutex_create(&pollset->p->ring_lock,
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APR_THREAD_MUTEX_DEFAULT,
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p)) != APR_SUCCESS)) {
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pollset->p = NULL;
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return rv;
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}
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#else
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if (flags & APR_POLLSET_THREADSAFE) {
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pollset->p = NULL;
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return APR_ENOTIMPL;
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}
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#endif
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/* POLLIN and POLLOUT are represented in different returned
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* events, so we need 2 entries per descriptor in the result set,
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* both for what is returned by kevent() and what is returned to
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* the caller of apr_pollset_poll() (since it doesn't spend the
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* CPU to coalesce separate APR_POLLIN and APR_POLLOUT events
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* for the same descriptor)
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*/
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pollset->p->setsize = 2 * size;
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pollset->p->ke_set =
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(struct kevent *) apr_palloc(p, pollset->p->setsize * sizeof(struct kevent));
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memset(pollset->p->ke_set, 0, pollset->p->setsize * sizeof(struct kevent));
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pollset->p->kqueue_fd = kqueue();
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if (pollset->p->kqueue_fd == -1) {
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pollset->p = NULL;
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return apr_get_netos_error();
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}
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{
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int flags;
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if ((flags = fcntl(pollset->p->kqueue_fd, F_GETFD)) == -1) {
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rv = errno;
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close(pollset->p->kqueue_fd);
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pollset->p = NULL;
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return rv;
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}
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flags |= FD_CLOEXEC;
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if (fcntl(pollset->p->kqueue_fd, F_SETFD, flags) == -1) {
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rv = errno;
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close(pollset->p->kqueue_fd);
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pollset->p = NULL;
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return rv;
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}
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}
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pollset->p->result_set = apr_palloc(p, pollset->p->setsize * sizeof(apr_pollfd_t));
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APR_RING_INIT(&pollset->p->query_ring, pfd_elem_t, link);
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APR_RING_INIT(&pollset->p->free_ring, pfd_elem_t, link);
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APR_RING_INIT(&pollset->p->dead_ring, pfd_elem_t, link);
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return APR_SUCCESS;
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}
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static apr_status_t impl_pollset_add(apr_pollset_t *pollset,
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const apr_pollfd_t *descriptor)
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{
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apr_os_sock_t fd;
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pfd_elem_t *elem;
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apr_status_t rv = APR_SUCCESS;
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pollset_lock_rings();
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if (!APR_RING_EMPTY(&(pollset->p->free_ring), pfd_elem_t, link)) {
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elem = APR_RING_FIRST(&(pollset->p->free_ring));
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APR_RING_REMOVE(elem, link);
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}
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else {
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elem = (pfd_elem_t *) apr_palloc(pollset->pool, sizeof(pfd_elem_t));
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APR_RING_ELEM_INIT(elem, link);
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}
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elem->pfd = *descriptor;
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if (descriptor->desc_type == APR_POLL_SOCKET) {
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fd = descriptor->desc.s->socketdes;
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}
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else {
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fd = descriptor->desc.f->filedes;
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}
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if (descriptor->reqevents & APR_POLLIN) {
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EV_SET(&pollset->p->kevent, fd, EVFILT_READ, EV_ADD, 0, 0, elem);
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if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
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NULL) == -1) {
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rv = apr_get_netos_error();
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}
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}
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if (descriptor->reqevents & APR_POLLOUT && rv == APR_SUCCESS) {
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EV_SET(&pollset->p->kevent, fd, EVFILT_WRITE, EV_ADD, 0, 0, elem);
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if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
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NULL) == -1) {
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rv = apr_get_netos_error();
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}
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}
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if (rv == APR_SUCCESS) {
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APR_RING_INSERT_TAIL(&(pollset->p->query_ring), elem, pfd_elem_t, link);
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}
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else {
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APR_RING_INSERT_TAIL(&(pollset->p->free_ring), elem, pfd_elem_t, link);
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}
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pollset_unlock_rings();
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return rv;
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}
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static apr_status_t impl_pollset_remove(apr_pollset_t *pollset,
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const apr_pollfd_t *descriptor)
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{
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pfd_elem_t *ep;
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apr_status_t rv;
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apr_os_sock_t fd;
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pollset_lock_rings();
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if (descriptor->desc_type == APR_POLL_SOCKET) {
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fd = descriptor->desc.s->socketdes;
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}
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else {
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fd = descriptor->desc.f->filedes;
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}
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rv = APR_NOTFOUND; /* unless at least one of the specified conditions is */
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if (descriptor->reqevents & APR_POLLIN) {
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EV_SET(&pollset->p->kevent, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
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if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
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NULL) != -1) {
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rv = APR_SUCCESS;
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}
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}
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if (descriptor->reqevents & APR_POLLOUT) {
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EV_SET(&pollset->p->kevent, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
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if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
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NULL) != -1) {
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rv = APR_SUCCESS;
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}
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}
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for (ep = APR_RING_FIRST(&(pollset->p->query_ring));
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ep != APR_RING_SENTINEL(&(pollset->p->query_ring),
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pfd_elem_t, link);
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ep = APR_RING_NEXT(ep, link)) {
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if (descriptor->desc.s == ep->pfd.desc.s) {
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APR_RING_REMOVE(ep, link);
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APR_RING_INSERT_TAIL(&(pollset->p->dead_ring),
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ep, pfd_elem_t, link);
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break;
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}
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}
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pollset_unlock_rings();
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return rv;
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}
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static apr_status_t impl_pollset_poll(apr_pollset_t *pollset,
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apr_interval_time_t timeout,
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apr_int32_t *num,
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const apr_pollfd_t **descriptors)
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{
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int ret, i, j;
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struct timespec tv, *tvptr;
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apr_status_t rv = APR_SUCCESS;
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apr_pollfd_t fd;
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if (timeout < 0) {
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tvptr = NULL;
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}
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else {
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tv.tv_sec = (long) apr_time_sec(timeout);
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tv.tv_nsec = (long) apr_time_usec(timeout) * 1000;
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tvptr = &tv;
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}
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ret = kevent(pollset->p->kqueue_fd, NULL, 0, pollset->p->ke_set,
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pollset->p->setsize, tvptr);
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(*num) = ret;
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if (ret < 0) {
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rv = apr_get_netos_error();
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}
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else if (ret == 0) {
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rv = APR_TIMEUP;
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}
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else {
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for (i = 0, j = 0; i < ret; i++) {
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fd = (((pfd_elem_t*)(pollset->p->ke_set[i].udata))->pfd);
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if ((pollset->flags & APR_POLLSET_WAKEABLE) &&
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fd.desc_type == APR_POLL_FILE &&
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fd.desc.f == pollset->wakeup_pipe[0]) {
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apr_pollset_drain_wakeup_pipe(pollset);
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rv = APR_EINTR;
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}
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else {
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pollset->p->result_set[j] = fd;
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pollset->p->result_set[j].rtnevents =
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get_kqueue_revent(pollset->p->ke_set[i].filter,
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pollset->p->ke_set[i].flags);
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j++;
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}
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}
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if ((*num = j)) { /* any event besides wakeup pipe? */
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rv = APR_SUCCESS;
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if (descriptors) {
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*descriptors = pollset->p->result_set;
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}
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}
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}
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pollset_lock_rings();
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/* Shift all PFDs in the Dead Ring to the Free Ring */
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APR_RING_CONCAT(&(pollset->p->free_ring), &(pollset->p->dead_ring),
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pfd_elem_t, link);
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pollset_unlock_rings();
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return rv;
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}
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static apr_pollset_provider_t impl = {
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impl_pollset_create,
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impl_pollset_add,
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impl_pollset_remove,
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impl_pollset_poll,
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impl_pollset_cleanup,
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"kqueue"
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};
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apr_pollset_provider_t *apr_pollset_provider_kqueue = &impl;
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static apr_status_t cb_cleanup(void *b_)
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{
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apr_pollcb_t *pollcb = (apr_pollcb_t *) b_;
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close(pollcb->fd);
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return APR_SUCCESS;
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}
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static apr_status_t impl_pollcb_create(apr_pollcb_t *pollcb,
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apr_uint32_t size,
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apr_pool_t *p,
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apr_uint32_t flags)
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{
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int fd;
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fd = kqueue();
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if (fd < 0) {
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return apr_get_netos_error();
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}
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{
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int flags;
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apr_status_t rv;
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if ((flags = fcntl(fd, F_GETFD)) == -1) {
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rv = errno;
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close(fd);
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pollcb->fd = -1;
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return rv;
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}
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flags |= FD_CLOEXEC;
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if (fcntl(fd, F_SETFD, flags) == -1) {
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rv = errno;
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close(fd);
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pollcb->fd = -1;
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return rv;
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}
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}
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pollcb->fd = fd;
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pollcb->pollset.ke = (struct kevent *)apr_pcalloc(p, 2 * size * sizeof(struct kevent));
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apr_pool_cleanup_register(p, pollcb, cb_cleanup, apr_pool_cleanup_null);
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return APR_SUCCESS;
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}
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static apr_status_t impl_pollcb_add(apr_pollcb_t *pollcb,
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apr_pollfd_t *descriptor)
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{
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apr_os_sock_t fd;
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struct kevent ev;
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apr_status_t rv = APR_SUCCESS;
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if (descriptor->desc_type == APR_POLL_SOCKET) {
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fd = descriptor->desc.s->socketdes;
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}
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else {
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fd = descriptor->desc.f->filedes;
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}
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if (descriptor->reqevents & APR_POLLIN) {
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EV_SET(&ev, fd, EVFILT_READ, EV_ADD, 0, 0, descriptor);
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if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) == -1) {
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rv = apr_get_netos_error();
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}
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}
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if (descriptor->reqevents & APR_POLLOUT && rv == APR_SUCCESS) {
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EV_SET(&ev, fd, EVFILT_WRITE, EV_ADD, 0, 0, descriptor);
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if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) == -1) {
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rv = apr_get_netos_error();
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}
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}
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return rv;
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}
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static apr_status_t impl_pollcb_remove(apr_pollcb_t *pollcb,
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apr_pollfd_t *descriptor)
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{
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apr_status_t rv;
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struct kevent ev;
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apr_os_sock_t fd;
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if (descriptor->desc_type == APR_POLL_SOCKET) {
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fd = descriptor->desc.s->socketdes;
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}
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else {
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fd = descriptor->desc.f->filedes;
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}
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rv = APR_NOTFOUND; /* unless at least one of the specified conditions is */
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if (descriptor->reqevents & APR_POLLIN) {
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EV_SET(&ev, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
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if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) != -1) {
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rv = APR_SUCCESS;
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}
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}
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if (descriptor->reqevents & APR_POLLOUT) {
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EV_SET(&ev, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
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if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) != -1) {
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rv = APR_SUCCESS;
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}
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}
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return rv;
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}
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static apr_status_t impl_pollcb_poll(apr_pollcb_t *pollcb,
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apr_interval_time_t timeout,
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apr_pollcb_cb_t func,
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void *baton)
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{
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int ret, i;
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struct timespec tv, *tvptr;
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apr_status_t rv = APR_SUCCESS;
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if (timeout < 0) {
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tvptr = NULL;
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}
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else {
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tv.tv_sec = (long) apr_time_sec(timeout);
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tv.tv_nsec = (long) apr_time_usec(timeout) * 1000;
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tvptr = &tv;
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}
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ret = kevent(pollcb->fd, NULL, 0, pollcb->pollset.ke, 2 * pollcb->nalloc,
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tvptr);
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if (ret < 0) {
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rv = apr_get_netos_error();
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}
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else if (ret == 0) {
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rv = APR_TIMEUP;
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}
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else {
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for (i = 0; i < ret; i++) {
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apr_pollfd_t *pollfd = (apr_pollfd_t *)(pollcb->pollset.ke[i].udata);
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pollfd->rtnevents = get_kqueue_revent(pollcb->pollset.ke[i].filter,
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pollcb->pollset.ke[i].flags);
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rv = func(baton, pollfd);
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if (rv) {
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return rv;
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}
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}
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}
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return rv;
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}
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static apr_pollcb_provider_t impl_cb = {
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impl_pollcb_create,
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impl_pollcb_add,
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impl_pollcb_remove,
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impl_pollcb_poll,
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"kqueue"
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};
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apr_pollcb_provider_t *apr_pollcb_provider_kqueue = &impl_cb;
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#endif /* HAVE_KQUEUE */
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