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/* 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_time.h"
#include "apr_portable.h"
#include "apr_arch_file_io.h"
#include "apr_arch_networkio.h"
#include "apr_arch_poll_private.h"
#include "apr_arch_inherit.h"
#if !APR_FILES_AS_SOCKETS
#ifdef WIN32
apr_status_t apr_poll_create_wakeup_pipe(apr_pool_t *pool, apr_pollfd_t *pfd,
apr_file_t **wakeup_pipe)
{
apr_status_t rv;
if ((rv = file_socket_pipe_create(&wakeup_pipe[0], &wakeup_pipe[1],
pool)) != APR_SUCCESS)
return rv;
/* Read end of the pipe is non-blocking */
apr_file_pipe_timeout_set(wakeup_pipe[0], 0);
pfd->reqevents = APR_POLLIN;
pfd->desc_type = APR_POLL_FILE;
pfd->desc.f = wakeup_pipe[0];
return APR_SUCCESS;
}
apr_status_t apr_poll_close_wakeup_pipe(apr_file_t **wakeup_pipe)
{
apr_status_t rv0 = APR_SUCCESS;
apr_status_t rv1 = APR_SUCCESS;
/* Close both sides of the wakeup pipe */
if (wakeup_pipe[0]) {
rv0 = file_socket_pipe_close(wakeup_pipe[0]);
wakeup_pipe[0] = NULL;
}
if (wakeup_pipe[1]) {
rv1 = file_socket_pipe_close(wakeup_pipe[1]);
wakeup_pipe[1] = NULL;
}
return rv0 ? rv0 : rv1;
}
#else /* !WIN32 */
apr_status_t apr_poll_create_wakeup_pipe(apr_pollfd_t *pfd, apr_file_t **wakeup_pipe)
{
return APR_ENOTIMPL;
}
apr_status_t apr_poll_close_wakeup_pipe(apr_file_t **wakeup_pipe)
{
return APR_ENOTIMPL;
}
#endif /* !WIN32 */
#else /* APR_FILES_AS_SOCKETS */
apr_status_t apr_poll_create_wakeup_pipe(apr_pool_t *pool, apr_pollfd_t *pfd,
apr_file_t **wakeup_pipe)
{
apr_status_t rv;
/* Read end of the pipe is non-blocking */
if ((rv = apr_file_pipe_create_ex(&wakeup_pipe[0], &wakeup_pipe[1],
APR_WRITE_BLOCK,
pool)) != APR_SUCCESS)
return rv;
pfd->p = pool;
pfd->reqevents = APR_POLLIN;
pfd->desc_type = APR_POLL_FILE;
pfd->desc.f = wakeup_pipe[0];
{
int flags;
if ((flags = fcntl(wakeup_pipe[0]->filedes, F_GETFD)) == -1)
return errno;
flags |= FD_CLOEXEC;
if (fcntl(wakeup_pipe[0]->filedes, F_SETFD, flags) == -1)
return errno;
}
{
int flags;
if ((flags = fcntl(wakeup_pipe[1]->filedes, F_GETFD)) == -1)
return errno;
flags |= FD_CLOEXEC;
if (fcntl(wakeup_pipe[1]->filedes, F_SETFD, flags) == -1)
return errno;
}
return APR_SUCCESS;
}
apr_status_t apr_poll_close_wakeup_pipe(apr_file_t **wakeup_pipe)
{
apr_status_t rv0 = APR_SUCCESS;
apr_status_t rv1 = APR_SUCCESS;
/* Close both sides of the wakeup pipe */
if (wakeup_pipe[0]) {
rv0 = apr_file_close(wakeup_pipe[0]);
wakeup_pipe[0] = NULL;
}
if (wakeup_pipe[1]) {
rv1 = apr_file_close(wakeup_pipe[1]);
wakeup_pipe[1] = NULL;
}
return rv0 ? rv0 : rv1;
}
#endif /* APR_FILES_AS_SOCKETS */
/* Read and discard whatever is in the wakeup pipe.
*/
void apr_poll_drain_wakeup_pipe(apr_file_t **wakeup_pipe)
{
char rb[512];
apr_size_t nr = sizeof(rb);
while (apr_file_read(wakeup_pipe[0], rb, &nr) == APR_SUCCESS) {
/* Although we write just one byte to the other end of the pipe
* during wakeup, multiple threads could call the wakeup.
* So simply drain out from the input side of the pipe all
* the data.
*/
if (nr != sizeof(rb))
break;
}
}
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