| /* 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_PORT |
| |
| static apr_int16_t get_event(apr_int16_t event) |
| { |
| apr_int16_t rv = 0; |
| |
| if (event & APR_POLLIN) |
| rv |= POLLIN; |
| if (event & APR_POLLPRI) |
| rv |= POLLPRI; |
| if (event & APR_POLLOUT) |
| rv |= POLLOUT; |
| if (event & APR_POLLERR) |
| rv |= POLLERR; |
| if (event & APR_POLLHUP) |
| rv |= POLLHUP; |
| if (event & APR_POLLNVAL) |
| rv |= POLLNVAL; |
| |
| return rv; |
| } |
| |
| static apr_int16_t get_revent(apr_int16_t event) |
| { |
| apr_int16_t rv = 0; |
| |
| if (event & POLLIN) |
| rv |= APR_POLLIN; |
| if (event & POLLPRI) |
| rv |= APR_POLLPRI; |
| if (event & POLLOUT) |
| rv |= APR_POLLOUT; |
| if (event & POLLERR) |
| rv |= APR_POLLERR; |
| if (event & POLLHUP) |
| rv |= APR_POLLHUP; |
| if (event & POLLNVAL) |
| rv |= APR_POLLNVAL; |
| |
| return rv; |
| } |
| |
| |
| struct apr_pollset_t |
| { |
| apr_pool_t *pool; |
| apr_uint32_t nelts; |
| apr_uint32_t nalloc; |
| int port_fd; |
| port_event_t *port_set; |
| 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; |
| APR_RING_HEAD(pfd_add_ring_t, pfd_elem_t) add_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'd 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->port_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 = APR_SUCCESS; |
| *pollset = apr_palloc(p, sizeof(**pollset)); |
| #if APR_HAS_THREADS |
| if (flags & APR_POLLSET_THREADSAFE && |
| ((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)->port_set = apr_palloc(p, size * sizeof(port_event_t)); |
| |
| (*pollset)->port_fd = port_create(); |
| |
| if ((*pollset)->port_fd < 0) { |
| return APR_ENOMEM; |
| } |
| |
| apr_pool_cleanup_register(p, (void *) (*pollset), backend_cleanup, |
| apr_pool_cleanup_null); |
| |
| (*pollset)->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t)); |
| |
| APR_RING_INIT(&(*pollset)->query_ring, pfd_elem_t, link); |
| APR_RING_INIT(&(*pollset)->add_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 rv; |
| } |
| |
| 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) |
| { |
| apr_os_sock_t fd; |
| pfd_elem_t *elem; |
| int res; |
| apr_status_t rv = APR_SUCCESS; |
| |
| 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; |
| |
| if (descriptor->desc_type == APR_POLL_SOCKET) { |
| fd = descriptor->desc.s->socketdes; |
| } |
| else { |
| fd = descriptor->desc.f->filedes; |
| } |
| |
| res = port_associate(pollset->port_fd, PORT_SOURCE_FD, fd, |
| get_event(descriptor->reqevents), (void *)elem); |
| |
| if (res < 0) { |
| rv = APR_ENOMEM; |
| 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) |
| { |
| apr_os_sock_t fd; |
| pfd_elem_t *ep; |
| apr_status_t rv = APR_SUCCESS; |
| int res; |
| |
| pollset_lock_rings(); |
| |
| if (descriptor->desc_type == APR_POLL_SOCKET) { |
| fd = descriptor->desc.s->socketdes; |
| } |
| else { |
| fd = descriptor->desc.f->filedes; |
| } |
| |
| res = port_dissociate(pollset->port_fd, PORT_SOURCE_FD, fd); |
| |
| if (res < 0) { |
| rv = APR_NOTFOUND; |
| } |
| |
| 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; |
| } |
| } |
| } |
| |
| if (!APR_RING_EMPTY(&(pollset->add_ring), pfd_elem_t, link)) { |
| for (ep = APR_RING_FIRST(&(pollset->add_ring)); |
| ep != APR_RING_SENTINEL(&(pollset->add_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) |
| { |
| apr_os_sock_t fd; |
| int ret, i; |
| unsigned int nget; |
| pfd_elem_t *ep; |
| struct timespec tv, *tvptr; |
| apr_status_t rv = APR_SUCCESS; |
| |
| if (timeout < 0) { |
| tvptr = NULL; |
| } |
| else { |
| tv.tv_sec = (long) apr_time_sec(timeout); |
| tv.tv_nsec = (long) apr_time_usec(timeout) * 1000; |
| tvptr = &tv; |
| } |
| |
| nget = 1; |
| |
| pollset_lock_rings(); |
| |
| while (!APR_RING_EMPTY(&(pollset->add_ring), pfd_elem_t, link)) { |
| ep = APR_RING_FIRST(&(pollset->add_ring)); |
| APR_RING_REMOVE(ep, link); |
| |
| if (ep->pfd.desc_type == APR_POLL_SOCKET) { |
| fd = ep->pfd.desc.s->socketdes; |
| } |
| else { |
| fd = ep->pfd.desc.f->filedes; |
| } |
| |
| port_associate(pollset->port_fd, PORT_SOURCE_FD, |
| fd, get_event(ep->pfd.reqevents), ep); |
| |
| APR_RING_INSERT_TAIL(&(pollset->query_ring), ep, pfd_elem_t, link); |
| |
| } |
| |
| pollset_unlock_rings(); |
| |
| ret = port_getn(pollset->port_fd, pollset->port_set, pollset->nalloc, |
| &nget, tvptr); |
| |
| (*num) = nget; |
| |
| if (ret == -1) { |
| (*num) = 0; |
| if (errno == ETIME || errno == EINTR) { |
| rv = APR_TIMEUP; |
| } |
| else { |
| rv = APR_EGENERAL; |
| } |
| } |
| else if (nget == 0) { |
| rv = APR_TIMEUP; |
| } |
| else { |
| |
| pollset_lock_rings(); |
| |
| for (i = 0; i < nget; i++) { |
| pollset->result_set[i] = |
| (((pfd_elem_t*)(pollset->port_set[i].portev_user))->pfd); |
| pollset->result_set[i].rtnevents = |
| get_revent(pollset->port_set[i].portev_events); |
| |
| APR_RING_REMOVE((pfd_elem_t*)pollset->port_set[i].portev_user, link); |
| |
| APR_RING_INSERT_TAIL(&(pollset->add_ring), |
| (pfd_elem_t*)pollset->port_set[i].portev_user, |
| pfd_elem_t, link); |
| } |
| |
| pollset_unlock_rings(); |
| |
| if (descriptors) { |
| *descriptors = pollset->result_set; |
| } |
| } |
| |
| |
| 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; |
| } |
| |
| #endif /* POLLSET_USES_PORT */ |
