| /* 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.h" |
| #include "apr_poll.h" |
| #include "apr_arch_networkio.h" |
| |
| #ifndef MSG_DONTWAIT |
| #define MSG_DONTWAIT 0x100 |
| #endif |
| |
| struct apr_pollset_t { |
| apr_pool_t *pool; |
| apr_uint32_t nelts; |
| apr_uint32_t nalloc; |
| int *pollset; |
| int num_read; |
| int num_write; |
| int num_except; |
| int num_total; |
| apr_pollfd_t *query_set; |
| apr_pollfd_t *result_set; |
| apr_socket_t *wake_listen; |
| apr_socket_t *wake_sender; |
| apr_sockaddr_t *wake_address; |
| }; |
| |
| |
| |
| 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 rc = APR_SUCCESS; |
| |
| if (flags & APR_POLLSET_WAKEABLE) { |
| size++; |
| } |
| |
| *pollset = apr_palloc(p, sizeof(**pollset)); |
| (*pollset)->pool = p; |
| (*pollset)->nelts = 0; |
| (*pollset)->nalloc = size; |
| (*pollset)->pollset = apr_palloc(p, size * sizeof(int) * 3); |
| (*pollset)->query_set = apr_palloc(p, size * sizeof(apr_pollfd_t)); |
| (*pollset)->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t)); |
| (*pollset)->num_read = -1; |
| (*pollset)->wake_listen = NULL; |
| (*pollset)->wake_sender = NULL; |
| |
| if (flags & APR_POLLSET_WAKEABLE) { |
| rc = apr_socket_create(&(*pollset)->wake_listen, APR_UNIX, SOCK_DGRAM, 0, p); |
| |
| if (rc == APR_SUCCESS) { |
| apr_sockaddr_t *listen_address; |
| apr_socket_timeout_set((*pollset)->wake_listen, 0); |
| apr_sockaddr_info_get(&listen_address, "", APR_UNIX, 0, 0, p); |
| rc = apr_socket_bind((*pollset)->wake_listen, listen_address); |
| |
| if (rc == APR_SUCCESS) { |
| apr_pollfd_t wake_poll_fd; |
| wake_poll_fd.p = p; |
| wake_poll_fd.desc_type = APR_POLL_SOCKET; |
| wake_poll_fd.reqevents = APR_POLLIN; |
| wake_poll_fd.desc.s = (*pollset)->wake_listen; |
| wake_poll_fd.client_data = NULL; |
| apr_pollset_add(*pollset, &wake_poll_fd); |
| apr_socket_addr_get(&(*pollset)->wake_address, APR_LOCAL, (*pollset)->wake_listen); |
| |
| rc = apr_socket_create(&(*pollset)->wake_sender, APR_UNIX, SOCK_DGRAM, 0, p); |
| } |
| } |
| } |
| |
| return rc; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_pollset_create_ex(apr_pollset_t **pollset, |
| apr_uint32_t size, |
| apr_pool_t *p, |
| apr_uint32_t flags, |
| apr_pollset_method_e method) |
| { |
| /* Only one method is supported */ |
| if (flags & APR_POLLSET_NODEFAULT) { |
| if (method != APR_POLLSET_DEFAULT && method != APR_POLLSET_POLL) { |
| return APR_ENOTIMPL; |
| } |
| } |
| |
| return apr_pollset_create(pollset, size, p, flags); |
| } |
| |
| APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t *pollset) |
| { |
| /* A no-op function for now. If we later implement /dev/poll |
| * support, we'll need to close the /dev/poll fd here |
| */ |
| return APR_SUCCESS; |
| } |
| |
| |
| |
| APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset, |
| const apr_pollfd_t *descriptor) |
| { |
| if (pollset->nelts == pollset->nalloc) { |
| return APR_ENOMEM; |
| } |
| |
| pollset->query_set[pollset->nelts] = *descriptor; |
| |
| if (descriptor->desc_type != APR_POLL_SOCKET) { |
| return APR_EBADF; |
| } |
| |
| pollset->nelts++; |
| pollset->num_read = -1; |
| return APR_SUCCESS; |
| } |
| |
| |
| |
| APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t *pollset, |
| const apr_pollfd_t *descriptor) |
| { |
| apr_uint32_t i; |
| |
| for (i = 0; i < pollset->nelts; i++) { |
| if (descriptor->desc.s == pollset->query_set[i].desc.s) { |
| /* Found an instance of the fd: remove this and any other copies */ |
| apr_uint32_t dst = i; |
| apr_uint32_t old_nelts = pollset->nelts; |
| pollset->nelts--; |
| |
| for (i++; i < old_nelts; i++) { |
| if (descriptor->desc.s == pollset->query_set[i].desc.s) { |
| pollset->nelts--; |
| } |
| else { |
| pollset->pollset[dst] = pollset->pollset[i]; |
| pollset->query_set[dst] = pollset->query_set[i]; |
| dst++; |
| } |
| } |
| |
| pollset->num_read = -1; |
| return APR_SUCCESS; |
| } |
| } |
| |
| return APR_NOTFOUND; |
| } |
| |
| |
| |
| static void make_pollset(apr_pollset_t *pollset) |
| { |
| int i; |
| int pos = 0; |
| |
| pollset->num_read = 0; |
| pollset->num_write = 0; |
| pollset->num_except = 0; |
| |
| for (i = 0; i < pollset->nelts; i++) { |
| if (pollset->query_set[i].reqevents & APR_POLLIN) { |
| pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes; |
| pollset->num_read++; |
| } |
| } |
| |
| for (i = 0; i < pollset->nelts; i++) { |
| if (pollset->query_set[i].reqevents & APR_POLLOUT) { |
| pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes; |
| pollset->num_write++; |
| } |
| } |
| |
| for (i = 0; i < pollset->nelts; i++) { |
| if (pollset->query_set[i].reqevents & APR_POLLPRI) { |
| pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes; |
| pollset->num_except++; |
| } |
| } |
| |
| pollset->num_total = pollset->num_read + pollset->num_write + pollset->num_except; |
| } |
| |
| |
| |
| 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 rv; |
| apr_uint32_t i; |
| int *pollresult; |
| int read_pos, write_pos, except_pos; |
| apr_status_t rc = APR_SUCCESS; |
| |
| if (pollset->num_read < 0) { |
| make_pollset(pollset); |
| } |
| |
| pollresult = alloca(sizeof(int) * pollset->num_total); |
| memcpy(pollresult, pollset->pollset, sizeof(int) * pollset->num_total); |
| (*num) = 0; |
| |
| if (timeout > 0) { |
| timeout /= 1000; |
| } |
| |
| rv = select(pollresult, pollset->num_read, pollset->num_write, pollset->num_except, timeout); |
| |
| if (rv < 0) { |
| return APR_FROM_OS_ERROR(sock_errno()); |
| } |
| |
| if (rv == 0) { |
| return APR_TIMEUP; |
| } |
| |
| read_pos = 0; |
| write_pos = pollset->num_read; |
| except_pos = pollset->num_read + pollset->num_write; |
| |
| for (i = 0; i < pollset->nelts; i++) { |
| int rtnevents = 0; |
| |
| if (pollset->query_set[i].reqevents & APR_POLLIN) { |
| if (pollresult[read_pos++] != -1) { |
| rtnevents |= APR_POLLIN; |
| } |
| } |
| |
| if (pollset->query_set[i].reqevents & APR_POLLOUT) { |
| if (pollresult[write_pos++] != -1) { |
| rtnevents |= APR_POLLOUT; |
| } |
| } |
| |
| if (pollset->query_set[i].reqevents & APR_POLLPRI) { |
| if (pollresult[except_pos++] != -1) { |
| rtnevents |= APR_POLLPRI; |
| } |
| } |
| |
| if (rtnevents) { |
| if (i == 0 && pollset->wake_listen != NULL) { |
| struct apr_sockaddr_t from_addr; |
| char buffer[16]; |
| apr_size_t buflen; |
| for (;;) { |
| buflen = sizeof(buffer); |
| rv = apr_socket_recvfrom(&from_addr, pollset->wake_listen, |
| MSG_DONTWAIT, buffer, &buflen); |
| if (rv != APR_SUCCESS) { |
| break; |
| } |
| /* Woken up, drain the pipe still. */ |
| rc = APR_EINTR; |
| } |
| } |
| else { |
| pollset->result_set[*num] = pollset->query_set[i]; |
| pollset->result_set[*num].rtnevents = rtnevents; |
| /* Event(s) besides wakeup pipe. */ |
| rc = APR_SUCCESS; |
| (*num)++; |
| } |
| } |
| } |
| |
| if (descriptors) { |
| *descriptors = pollset->result_set; |
| } |
| |
| return rc; |
| } |
| |
| |
| |
| APR_DECLARE(apr_status_t) apr_pollset_wakeup(apr_pollset_t *pollset) |
| { |
| if (pollset->wake_sender) { |
| apr_size_t len = 1; |
| return apr_socket_sendto(pollset->wake_sender, pollset->wake_address, 0, "", &len); |
| } |
| |
| return APR_EINIT; |
| } |
| |
| |
| |
| APR_DECLARE(const char *) apr_poll_method_defname() |
| { |
| return "select"; |
| } |
| |
| |
| |
| APR_DECLARE(const char *) apr_pollset_method_name(apr_pollset_t *pollset) |
| { |
| return "select"; |
| } |