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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_arch_file_io.h"
#include "apr_arch_networkio.h"
#include "apr_poll.h"
#include "apr_errno.h"
#include "apr_support.h"
/* The only case where we don't use wait_for_io_or_timeout is on
* pre-BONE BeOS, so this check should be sufficient and simpler */
#if !defined(BEOS_R5) && !defined(OS2) && APR_FILES_AS_SOCKETS
#define USE_WAIT_FOR_IO
#endif
#ifdef USE_WAIT_FOR_IO
#ifdef WAITIO_USES_POLL
#if HAVE_POLL_H
#include <poll.h>
#elif HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif
apr_status_t apr_wait_for_io_or_timeout(apr_file_t *f, apr_socket_t *s,
int for_read)
{
struct pollfd pfd;
int rc, timeout;
timeout = f ? f->timeout : s->timeout;
pfd.fd = f ? f->filedes : s->socketdes;
pfd.events = for_read ? POLLIN : POLLOUT;
if (timeout > 0) {
timeout = (timeout + 999) / 1000;
}
do {
rc = poll(&pfd, 1, timeout);
} while (rc == -1 && errno == EINTR);
if (rc == 0) {
return APR_TIMEUP;
}
else if (rc > 0) {
return APR_SUCCESS;
}
else {
return errno;
}
}
#else /* !WAITIO_USES_POLL */
apr_status_t apr_wait_for_io_or_timeout(apr_file_t *f, apr_socket_t *s,
int for_read)
{
apr_interval_time_t timeout;
apr_pollfd_t pfd;
int type = for_read ? APR_POLLIN : APR_POLLOUT;
apr_pollset_t *pollset;
apr_status_t status;
/* TODO - timeout should be less each time through this loop */
if (f) {
pfd.desc_type = APR_POLL_FILE;
pfd.desc.f = f;
pollset = f->pollset;
if (pollset == NULL) {
status = apr_pollset_create(&(f->pollset), 1, f->pool, 0);
if (status != APR_SUCCESS) {
return status;
}
pollset = f->pollset;
}
timeout = f->timeout;
}
else {
pfd.desc_type = APR_POLL_SOCKET;
pfd.desc.s = s;
pollset = s->pollset;
timeout = s->timeout;
}
pfd.reqevents = type;
/* Remove the object if it was in the pollset, then add in the new
* object with the correct reqevents value. Ignore the status result
* on the remove, because it might not be in there (yet).
*/
(void) apr_pollset_remove(pollset, &pfd);
/* ### check status code */
(void) apr_pollset_add(pollset, &pfd);
do {
int numdesc;
const apr_pollfd_t *pdesc;
status = apr_pollset_poll(pollset, timeout, &numdesc, &pdesc);
if (numdesc == 1 && (pdesc[0].rtnevents & type) != 0) {
return APR_SUCCESS;
}
} while (APR_STATUS_IS_EINTR(status));
return status;
}
#endif /* WAITIO_USES_POLL */
#endif /* USE_WAIT_FOR_IO */
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