248 lines
7.7 KiB
C
248 lines
7.7 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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#ifdef WIN32
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/* POSIX defines 1024 for the FD_SETSIZE */
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#define FD_SETSIZE 1024
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#endif
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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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static apr_pollset_method_e pollset_default_method = POLLSET_DEFAULT_METHOD;
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static apr_status_t pollset_cleanup(void *p)
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{
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apr_pollset_t *pollset = (apr_pollset_t *) p;
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if (pollset->provider->cleanup) {
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(*pollset->provider->cleanup)(pollset);
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}
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if (pollset->flags & APR_POLLSET_WAKEABLE) {
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apr_poll_close_wakeup_pipe(pollset->wakeup_pipe);
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}
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return APR_SUCCESS;
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}
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#if defined(HAVE_KQUEUE)
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extern const apr_pollset_provider_t *apr_pollset_provider_kqueue;
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#endif
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#if defined(HAVE_PORT_CREATE)
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extern const apr_pollset_provider_t *apr_pollset_provider_port;
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#endif
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#if defined(HAVE_EPOLL)
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extern const apr_pollset_provider_t *apr_pollset_provider_epoll;
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#endif
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#if defined(HAVE_AIO_MSGQ)
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extern const apr_pollset_provider_t *apr_pollset_provider_aio_msgq;
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#endif
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#if defined(HAVE_POLL)
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extern const apr_pollset_provider_t *apr_pollset_provider_poll;
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#endif
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extern const apr_pollset_provider_t *apr_pollset_provider_select;
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static const apr_pollset_provider_t *pollset_provider(apr_pollset_method_e method)
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{
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const apr_pollset_provider_t *provider = NULL;
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switch (method) {
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case APR_POLLSET_KQUEUE:
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#if defined(HAVE_KQUEUE)
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provider = apr_pollset_provider_kqueue;
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#endif
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break;
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case APR_POLLSET_PORT:
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#if defined(HAVE_PORT_CREATE)
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provider = apr_pollset_provider_port;
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#endif
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break;
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case APR_POLLSET_EPOLL:
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#if defined(HAVE_EPOLL)
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provider = apr_pollset_provider_epoll;
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#endif
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break;
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case APR_POLLSET_AIO_MSGQ:
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#if defined(HAVE_AIO_MSGQ)
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provider = apr_pollset_provider_aio_msgq;
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#endif
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break;
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case APR_POLLSET_POLL:
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#if defined(HAVE_POLL)
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provider = apr_pollset_provider_poll;
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#endif
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break;
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case APR_POLLSET_SELECT:
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provider = apr_pollset_provider_select;
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break;
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case APR_POLLSET_DEFAULT:
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break;
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}
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return provider;
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}
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APR_DECLARE(apr_status_t) apr_pollset_create_ex(apr_pollset_t **ret_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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apr_pollset_method_e method)
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{
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apr_status_t rv;
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apr_pollset_t *pollset;
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const apr_pollset_provider_t *provider = NULL;
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*ret_pollset = NULL;
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#ifdef WIN32
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/* Favor WSAPoll if supported.
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* This will work only if ws2_32.dll has WSAPoll funtion.
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* In other cases it will fall back to select() method unless
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* the APR_POLLSET_NODEFAULT is added to the flags.
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*/
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if (method == APR_POLLSET_DEFAULT) {
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method = APR_POLLSET_POLL;
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}
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#endif
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if (method == APR_POLLSET_DEFAULT)
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method = pollset_default_method;
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while (provider == NULL) {
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provider = pollset_provider(method);
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if (!provider) {
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if ((flags & APR_POLLSET_NODEFAULT) == APR_POLLSET_NODEFAULT)
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return APR_ENOTIMPL;
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if (method == pollset_default_method)
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return APR_ENOTIMPL;
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method = pollset_default_method;
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}
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}
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if (flags & APR_POLLSET_WAKEABLE) {
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/* Add room for wakeup descriptor */
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size++;
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}
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pollset = apr_palloc(p, sizeof(*pollset));
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pollset->nelts = 0;
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pollset->nalloc = size;
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pollset->pool = p;
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pollset->flags = flags;
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pollset->provider = provider;
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rv = (*provider->create)(pollset, size, p, flags);
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if (rv == APR_ENOTIMPL) {
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if (method == pollset_default_method) {
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return rv;
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}
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provider = pollset_provider(pollset_default_method);
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if (!provider) {
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return APR_ENOTIMPL;
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}
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rv = (*provider->create)(pollset, size, p, flags);
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if (rv != APR_SUCCESS) {
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return rv;
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}
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pollset->provider = provider;
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}
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else if (rv != APR_SUCCESS) {
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return rv;
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}
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if (flags & APR_POLLSET_WAKEABLE) {
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/* Create wakeup pipe */
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if ((rv = apr_poll_create_wakeup_pipe(pollset->pool, &pollset->wakeup_pfd,
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pollset->wakeup_pipe))
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!= APR_SUCCESS) {
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return rv;
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}
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if ((rv = apr_pollset_add(pollset, &pollset->wakeup_pfd)) != APR_SUCCESS) {
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return rv;
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}
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}
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if ((flags & APR_POLLSET_WAKEABLE) || provider->cleanup)
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apr_pool_cleanup_register(p, pollset, pollset_cleanup,
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apr_pool_cleanup_null);
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*ret_pollset = pollset;
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return APR_SUCCESS;
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}
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APR_DECLARE(const char *) apr_pollset_method_name(apr_pollset_t *pollset)
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{
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return pollset->provider->name;
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}
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APR_DECLARE(const char *) apr_poll_method_defname()
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{
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const apr_pollset_provider_t *provider = NULL;
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provider = pollset_provider(pollset_default_method);
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if (provider)
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return provider->name;
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else
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return "unknown";
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}
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APR_DECLARE(apr_status_t) apr_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_pollset_method_e method = APR_POLLSET_DEFAULT;
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return apr_pollset_create_ex(pollset, size, p, flags, method);
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}
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APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t * pollset)
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{
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if (pollset->flags & APR_POLLSET_WAKEABLE ||
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pollset->provider->cleanup)
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return apr_pool_cleanup_run(pollset->pool, pollset,
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pollset_cleanup);
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else
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_pollset_wakeup(apr_pollset_t *pollset)
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{
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if (pollset->flags & APR_POLLSET_WAKEABLE)
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return apr_file_putc(1, pollset->wakeup_pipe[1]);
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else
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return APR_EINIT;
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}
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APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset,
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const apr_pollfd_t *descriptor)
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{
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return (*pollset->provider->add)(pollset, descriptor);
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}
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APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t *pollset,
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const apr_pollfd_t *descriptor)
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{
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return (*pollset->provider->remove)(pollset, descriptor);
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}
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APR_DECLARE(apr_status_t) apr_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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return (*pollset->provider->poll)(pollset, timeout, num, descriptors);
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}
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