1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 #include "apr_portable.h"
21 #include "apr_arch_file_io.h"
22 #include "apr_arch_networkio.h"
23 #include "apr_arch_poll_private.h"
24 #include "apr_arch_inherit.h"
28 static apr_int16_t get_kqueue_revent(apr_int16_t event, apr_int16_t flags)
32 if (event == EVFILT_READ)
34 else if (event == EVFILT_WRITE)
38 /* APR_POLLPRI, APR_POLLERR, and APR_POLLNVAL are not handled by this
40 * TODO: See if EV_ERROR + certain system errors in the returned data field
41 * should map to APR_POLLNVAL.
46 struct apr_pollset_private_t
51 struct kevent *ke_set;
52 apr_pollfd_t *result_set;
54 /* A thread mutex to protect operations on the rings */
55 apr_thread_mutex_t *ring_lock;
57 /* A ring containing all of the pollfd_t that are active */
58 APR_RING_HEAD(pfd_query_ring_t, pfd_elem_t) query_ring;
59 /* A ring of pollfd_t that have been used, and then _remove'd */
60 APR_RING_HEAD(pfd_free_ring_t, pfd_elem_t) free_ring;
61 /* A ring of pollfd_t where rings that have been _remove'd but
62 might still be inside a _poll */
63 APR_RING_HEAD(pfd_dead_ring_t, pfd_elem_t) dead_ring;
66 static apr_status_t impl_pollset_cleanup(apr_pollset_t *pollset)
68 close(pollset->p->kqueue_fd);
72 static apr_status_t impl_pollset_create(apr_pollset_t *pollset,
78 pollset->p = apr_palloc(p, sizeof(apr_pollset_private_t));
80 if (flags & APR_POLLSET_THREADSAFE &&
81 ((rv = apr_thread_mutex_create(&pollset->p->ring_lock,
82 APR_THREAD_MUTEX_DEFAULT,
83 p)) != APR_SUCCESS)) {
88 if (flags & APR_POLLSET_THREADSAFE) {
94 /* POLLIN and POLLOUT are represented in different returned
95 * events, so we need 2 entries per descriptor in the result set,
96 * both for what is returned by kevent() and what is returned to
97 * the caller of apr_pollset_poll() (since it doesn't spend the
98 * CPU to coalesce separate APR_POLLIN and APR_POLLOUT events
99 * for the same descriptor)
101 pollset->p->setsize = 2 * size;
104 (struct kevent *) apr_palloc(p, pollset->p->setsize * sizeof(struct kevent));
106 memset(pollset->p->ke_set, 0, pollset->p->setsize * sizeof(struct kevent));
108 pollset->p->kqueue_fd = kqueue();
110 if (pollset->p->kqueue_fd == -1) {
112 return apr_get_netos_error();
118 if ((flags = fcntl(pollset->p->kqueue_fd, F_GETFD)) == -1)
122 if (fcntl(pollset->p->kqueue_fd, F_SETFD, flags) == -1)
126 pollset->p->result_set = apr_palloc(p, pollset->p->setsize * sizeof(apr_pollfd_t));
128 APR_RING_INIT(&pollset->p->query_ring, pfd_elem_t, link);
129 APR_RING_INIT(&pollset->p->free_ring, pfd_elem_t, link);
130 APR_RING_INIT(&pollset->p->dead_ring, pfd_elem_t, link);
135 static apr_status_t impl_pollset_add(apr_pollset_t *pollset,
136 const apr_pollfd_t *descriptor)
140 apr_status_t rv = APR_SUCCESS;
142 pollset_lock_rings();
144 if (!APR_RING_EMPTY(&(pollset->p->free_ring), pfd_elem_t, link)) {
145 elem = APR_RING_FIRST(&(pollset->p->free_ring));
146 APR_RING_REMOVE(elem, link);
149 elem = (pfd_elem_t *) apr_palloc(pollset->pool, sizeof(pfd_elem_t));
150 APR_RING_ELEM_INIT(elem, link);
152 elem->pfd = *descriptor;
154 if (descriptor->desc_type == APR_POLL_SOCKET) {
155 fd = descriptor->desc.s->socketdes;
158 fd = descriptor->desc.f->filedes;
161 if (descriptor->reqevents & APR_POLLIN) {
162 EV_SET(&pollset->p->kevent, fd, EVFILT_READ, EV_ADD, 0, 0, elem);
164 if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
166 rv = apr_get_netos_error();
170 if (descriptor->reqevents & APR_POLLOUT && rv == APR_SUCCESS) {
171 EV_SET(&pollset->p->kevent, fd, EVFILT_WRITE, EV_ADD, 0, 0, elem);
173 if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
175 rv = apr_get_netos_error();
179 if (rv == APR_SUCCESS) {
180 APR_RING_INSERT_TAIL(&(pollset->p->query_ring), elem, pfd_elem_t, link);
183 APR_RING_INSERT_TAIL(&(pollset->p->free_ring), elem, pfd_elem_t, link);
186 pollset_unlock_rings();
191 static apr_status_t impl_pollset_remove(apr_pollset_t *pollset,
192 const apr_pollfd_t *descriptor)
198 pollset_lock_rings();
200 if (descriptor->desc_type == APR_POLL_SOCKET) {
201 fd = descriptor->desc.s->socketdes;
204 fd = descriptor->desc.f->filedes;
207 rv = APR_NOTFOUND; /* unless at least one of the specified conditions is */
208 if (descriptor->reqevents & APR_POLLIN) {
209 EV_SET(&pollset->p->kevent, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
211 if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
217 if (descriptor->reqevents & APR_POLLOUT) {
218 EV_SET(&pollset->p->kevent, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
220 if (kevent(pollset->p->kqueue_fd, &pollset->p->kevent, 1, NULL, 0,
226 for (ep = APR_RING_FIRST(&(pollset->p->query_ring));
227 ep != APR_RING_SENTINEL(&(pollset->p->query_ring),
229 ep = APR_RING_NEXT(ep, link)) {
231 if (descriptor->desc.s == ep->pfd.desc.s) {
232 APR_RING_REMOVE(ep, link);
233 APR_RING_INSERT_TAIL(&(pollset->p->dead_ring),
234 ep, pfd_elem_t, link);
239 pollset_unlock_rings();
244 static apr_status_t impl_pollset_poll(apr_pollset_t *pollset,
245 apr_interval_time_t timeout,
247 const apr_pollfd_t **descriptors)
250 struct timespec tv, *tvptr;
251 apr_status_t rv = APR_SUCCESS;
258 tv.tv_sec = (long) apr_time_sec(timeout);
259 tv.tv_nsec = (long) apr_time_usec(timeout) * 1000;
263 ret = kevent(pollset->p->kqueue_fd, NULL, 0, pollset->p->ke_set,
264 pollset->p->setsize, tvptr);
267 rv = apr_get_netos_error();
273 for (i = 0, j = 0; i < ret; i++) {
274 fd = (((pfd_elem_t*)(pollset->p->ke_set[i].udata))->pfd);
275 if ((pollset->flags & APR_POLLSET_WAKEABLE) &&
276 fd.desc_type == APR_POLL_FILE &&
277 fd.desc.f == pollset->wakeup_pipe[0]) {
278 apr_pollset_drain_wakeup_pipe(pollset);
282 pollset->p->result_set[j] = fd;
283 pollset->p->result_set[j].rtnevents =
284 get_kqueue_revent(pollset->p->ke_set[i].filter,
285 pollset->p->ke_set[i].flags);
289 if ((*num = j)) { /* any event besides wakeup pipe? */
292 *descriptors = pollset->p->result_set;
298 pollset_lock_rings();
300 /* Shift all PFDs in the Dead Ring to the Free Ring */
301 APR_RING_CONCAT(&(pollset->p->free_ring), &(pollset->p->dead_ring),
304 pollset_unlock_rings();
309 static apr_pollset_provider_t impl = {
314 impl_pollset_cleanup,
318 apr_pollset_provider_t *apr_pollset_provider_kqueue = &impl;
320 static apr_status_t cb_cleanup(void *b_)
322 apr_pollcb_t *pollcb = (apr_pollcb_t *) b_;
327 static apr_status_t impl_pollcb_create(apr_pollcb_t *pollcb,
336 return apr_get_netos_error();
342 if ((flags = fcntl(fd, F_GETFD)) == -1)
346 if (fcntl(fd, F_SETFD, flags) == -1)
351 pollcb->pollset.ke = (struct kevent *)apr_pcalloc(p, 2 * size * sizeof(struct kevent));
352 apr_pool_cleanup_register(p, pollcb, cb_cleanup, apr_pool_cleanup_null);
357 static apr_status_t impl_pollcb_add(apr_pollcb_t *pollcb,
358 apr_pollfd_t *descriptor)
362 apr_status_t rv = APR_SUCCESS;
364 if (descriptor->desc_type == APR_POLL_SOCKET) {
365 fd = descriptor->desc.s->socketdes;
368 fd = descriptor->desc.f->filedes;
371 if (descriptor->reqevents & APR_POLLIN) {
372 EV_SET(&ev, fd, EVFILT_READ, EV_ADD, 0, 0, descriptor);
374 if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) == -1) {
375 rv = apr_get_netos_error();
379 if (descriptor->reqevents & APR_POLLOUT && rv == APR_SUCCESS) {
380 EV_SET(&ev, fd, EVFILT_WRITE, EV_ADD, 0, 0, descriptor);
382 if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) == -1) {
383 rv = apr_get_netos_error();
390 static apr_status_t impl_pollcb_remove(apr_pollcb_t *pollcb,
391 apr_pollfd_t *descriptor)
397 if (descriptor->desc_type == APR_POLL_SOCKET) {
398 fd = descriptor->desc.s->socketdes;
401 fd = descriptor->desc.f->filedes;
404 rv = APR_NOTFOUND; /* unless at least one of the specified conditions is */
405 if (descriptor->reqevents & APR_POLLIN) {
406 EV_SET(&ev, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
408 if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) != -1) {
413 if (descriptor->reqevents & APR_POLLOUT) {
414 EV_SET(&ev, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
416 if (kevent(pollcb->fd, &ev, 1, NULL, 0, NULL) != -1) {
425 static apr_status_t impl_pollcb_poll(apr_pollcb_t *pollcb,
426 apr_interval_time_t timeout,
427 apr_pollcb_cb_t func,
431 struct timespec tv, *tvptr;
432 apr_status_t rv = APR_SUCCESS;
438 tv.tv_sec = (long) apr_time_sec(timeout);
439 tv.tv_nsec = (long) apr_time_usec(timeout) * 1000;
443 ret = kevent(pollcb->fd, NULL, 0, pollcb->pollset.ke, 2 * pollcb->nalloc,
447 rv = apr_get_netos_error();
453 for (i = 0; i < ret; i++) {
454 apr_pollfd_t *pollfd = (apr_pollfd_t *)(pollcb->pollset.ke[i].udata);
456 pollfd->rtnevents = get_kqueue_revent(pollcb->pollset.ke[i].filter,
457 pollcb->pollset.ke[i].flags);
459 rv = func(baton, pollfd);
470 static apr_pollcb_provider_t impl_cb = {
478 apr_pollcb_provider_t *apr_pollcb_provider_kqueue = &impl_cb;
480 #endif /* HAVE_KQUEUE */