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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed 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_networkio.h"
#include "apr_arch_file_io.h"
#include "apr_arch_poll_private.h"
#ifdef POLL_USES_SELECT
APR_DECLARE(apr_status_t) apr_poll(apr_pollfd_t *aprset, int num,
apr_int32_t *nsds,
apr_interval_time_t timeout)
{
fd_set readset, writeset, exceptset;
int rv, i;
int maxfd = -1;
struct timeval tv, *tvptr;
#ifdef NETWARE
apr_datatype_e set_type = APR_NO_DESC;
#endif
if (timeout < 0) {
tvptr = NULL;
}
else {
tv.tv_sec = (long) apr_time_sec(timeout);
tv.tv_usec = (long) apr_time_usec(timeout);
tvptr = &tv;
}
FD_ZERO(&readset);
FD_ZERO(&writeset);
FD_ZERO(&exceptset);
for (i = 0; i < num; i++) {
apr_os_sock_t fd;
aprset[i].rtnevents = 0;
if (aprset[i].desc_type == APR_POLL_SOCKET) {
#ifdef NETWARE
if (HAS_PIPES(set_type)) {
return APR_EBADF;
}
else {
set_type = APR_POLL_SOCKET;
}
#endif
fd = aprset[i].desc.s->socketdes;
}
else if (aprset[i].desc_type == APR_POLL_FILE) {
#if !APR_FILES_AS_SOCKETS
return APR_EBADF;
#else
#ifdef NETWARE
if (aprset[i].desc.f->is_pipe && !HAS_SOCKETS(set_type)) {
set_type = APR_POLL_FILE;
}
else
return APR_EBADF;
#endif /* NETWARE */
fd = aprset[i].desc.f->filedes;
#endif /* APR_FILES_AS_SOCKETS */
}
else {
break;
}
#if !defined(WIN32) && !defined(NETWARE) /* socket sets handled with array of handles */
if (fd >= FD_SETSIZE) {
/* XXX invent new error code so application has a clue */
return APR_EBADF;
}
#endif
if (aprset[i].reqevents & APR_POLLIN) {
FD_SET(fd, &readset);
}
if (aprset[i].reqevents & APR_POLLOUT) {
FD_SET(fd, &writeset);
}
if (aprset[i].reqevents &
(APR_POLLPRI | APR_POLLERR | APR_POLLHUP | APR_POLLNVAL)) {
FD_SET(fd, &exceptset);
}
if ((int) fd > maxfd) {
maxfd = (int) fd;
}
}
#ifdef NETWARE
if (HAS_PIPES(set_type)) {
rv = pipe_select(maxfd + 1, &readset, &writeset, &exceptset, tvptr);
}
else {
#endif
rv = select(maxfd + 1, &readset, &writeset, &exceptset, tvptr);
#ifdef NETWARE
}
#endif
(*nsds) = rv;
if ((*nsds) == 0) {
return APR_TIMEUP;
}
if ((*nsds) < 0) {
return apr_get_netos_error();
}
for (i = 0; i < num; i++) {
apr_os_sock_t fd;
if (aprset[i].desc_type == APR_POLL_SOCKET) {
fd = aprset[i].desc.s->socketdes;
}
else if (aprset[i].desc_type == APR_POLL_FILE) {
#if !APR_FILES_AS_SOCKETS
return APR_EBADF;
#else
fd = aprset[i].desc.f->filedes;
#endif
}
else {
break;
}
if (FD_ISSET(fd, &readset)) {
aprset[i].rtnevents |= APR_POLLIN;
}
if (FD_ISSET(fd, &writeset)) {
aprset[i].rtnevents |= APR_POLLOUT;
}
if (FD_ISSET(fd, &exceptset)) {
aprset[i].rtnevents |= APR_POLLERR;
}
}
return APR_SUCCESS;
}
#endif /* POLL_USES_SELECT */
#ifdef POLLSET_USES_SELECT
struct apr_pollset_t
{
apr_pool_t *pool;
apr_uint32_t nelts;
apr_uint32_t nalloc;
fd_set readset, writeset, exceptset;
int maxfd;
apr_pollfd_t *query_set;
apr_pollfd_t *result_set;
#ifdef NETWARE
int set_type;
#endif
};
APR_DECLARE(apr_status_t) apr_pollset_create(apr_pollset_t **pollset,
apr_uint32_t size,
apr_pool_t *p,
apr_uint32_t flags)
{
if (flags & APR_POLLSET_THREADSAFE) {
*pollset = NULL;
return APR_ENOTIMPL;
}
#ifdef FD_SETSIZE
if (size > FD_SETSIZE) {
*pollset = NULL;
return APR_EINVAL;
}
#endif
*pollset = apr_palloc(p, sizeof(**pollset));
(*pollset)->nelts = 0;
(*pollset)->nalloc = size;
(*pollset)->pool = p;
FD_ZERO(&((*pollset)->readset));
FD_ZERO(&((*pollset)->writeset));
FD_ZERO(&((*pollset)->exceptset));
(*pollset)->maxfd = 0;
#ifdef NETWARE
(*pollset)->set_type = APR_NO_DESC;
#endif
(*pollset)->query_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
(*pollset)->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t * pollset)
{
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset,
const apr_pollfd_t *descriptor)
{
apr_os_sock_t fd;
if (pollset->nelts == pollset->nalloc) {
return APR_ENOMEM;
}
pollset->query_set[pollset->nelts] = *descriptor;
if (descriptor->desc_type == APR_POLL_SOCKET) {
#ifdef NETWARE
/* NetWare can't handle mixed descriptor types in select() */
if (HAS_PIPES(pollset->set_type)) {
return APR_EBADF;
}
else {
pollset->set_type = APR_POLL_SOCKET;
}
#endif
fd = descriptor->desc.s->socketdes;
}
else {
#if !APR_FILES_AS_SOCKETS
return APR_EBADF;
#else
#ifdef NETWARE
/* NetWare can't handle mixed descriptor types in select() */
if (descriptor->desc.f->is_pipe && !HAS_SOCKETS(pollset->set_type)) {
pollset->set_type = APR_POLL_FILE;
fd = descriptor->desc.f->filedes;
}
else {
return APR_EBADF;
}
#else
fd = descriptor->desc.f->filedes;
#endif
#endif
}
#if !defined(WIN32) && !defined(NETWARE) /* socket sets handled with array of handles */
if (fd >= FD_SETSIZE) {
/* XXX invent new error code so application has a clue */
return APR_EBADF;
}
#endif
if (descriptor->reqevents & APR_POLLIN) {
FD_SET(fd, &(pollset->readset));
}
if (descriptor->reqevents & APR_POLLOUT) {
FD_SET(fd, &(pollset->writeset));
}
if (descriptor->reqevents &
(APR_POLLPRI | APR_POLLERR | APR_POLLHUP | APR_POLLNVAL)) {
FD_SET(fd, &(pollset->exceptset));
}
if ((int) fd > pollset->maxfd) {
pollset->maxfd = (int) fd;
}
pollset->nelts++;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t * pollset,
const apr_pollfd_t * descriptor)
{
apr_uint32_t i;
apr_os_sock_t fd;
if (descriptor->desc_type == APR_POLL_SOCKET) {
fd = descriptor->desc.s->socketdes;
}
else {
#if !APR_FILES_AS_SOCKETS
return APR_EBADF;
#else
fd = descriptor->desc.f->filedes;
#endif
}
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->query_set[dst] = pollset->query_set[i];
dst++;
}
}
FD_CLR(fd, &(pollset->readset));
FD_CLR(fd, &(pollset->writeset));
FD_CLR(fd, &(pollset->exceptset));
if (((int) fd == pollset->maxfd) && (pollset->maxfd > 0)) {
pollset->maxfd--;
}
return APR_SUCCESS;
}
}
return APR_NOTFOUND;
}
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, j;
struct timeval tv, *tvptr;
fd_set readset, writeset, exceptset;
if (timeout < 0) {
tvptr = NULL;
}
else {
tv.tv_sec = (long) apr_time_sec(timeout);
tv.tv_usec = (long) apr_time_usec(timeout);
tvptr = &tv;
}
memcpy(&readset, &(pollset->readset), sizeof(fd_set));
memcpy(&writeset, &(pollset->writeset), sizeof(fd_set));
memcpy(&exceptset, &(pollset->exceptset), sizeof(fd_set));
#ifdef NETWARE
if (HAS_PIPES(pollset->set_type)) {
rv = pipe_select(pollset->maxfd + 1, &readset, &writeset, &exceptset,
tvptr);
}
else
#endif
rv = select(pollset->maxfd + 1, &readset, &writeset, &exceptset,
tvptr);
(*num) = rv;
if (rv < 0) {
return apr_get_netos_error();
}
if (rv == 0) {
return APR_TIMEUP;
}
j = 0;
for (i = 0; i < pollset->nelts; i++) {
apr_os_sock_t fd;
if (pollset->query_set[i].desc_type == APR_POLL_SOCKET) {
fd = pollset->query_set[i].desc.s->socketdes;
}
else {
#if !APR_FILES_AS_SOCKETS
return APR_EBADF;
#else
fd = pollset->query_set[i].desc.f->filedes;
#endif
}
if (FD_ISSET(fd, &readset) || FD_ISSET(fd, &writeset) ||
FD_ISSET(fd, &exceptset)) {
pollset->result_set[j] = pollset->query_set[i];
pollset->result_set[j].rtnevents = 0;
if (FD_ISSET(fd, &readset)) {
pollset->result_set[j].rtnevents |= APR_POLLIN;
}
if (FD_ISSET(fd, &writeset)) {
pollset->result_set[j].rtnevents |= APR_POLLOUT;
}
if (FD_ISSET(fd, &exceptset)) {
pollset->result_set[j].rtnevents |= APR_POLLERR;
}
j++;
}
}
if (descriptors)
*descriptors = pollset->result_set;
return APR_SUCCESS;
}
#endif /* POLLSET_USES_SELECT */
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