1 files changed, 449 insertions, 0 deletions
diff --git a/poll/unix/select.c b/poll/unix/select.c
new file mode 100644
index 000000000000..61a064f469bb
--- /dev/null
+++ b/poll/unix/select.c
@@ -0,0 +1,449 @@
+/* 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.
+ */
+
+#ifdef WIN32
+/* POSIX defines 1024 for the FD_SETSIZE */
+#define FD_SETSIZE 1024
+#endif
+
+#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"
+
+#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
+
+#ifdef WIN32
+    /* On Win32, select() must be presented with at least one socket to
+     * poll on, or select() will return WSAEINVAL.  So, we'll just
+     * short-circuit and bail now.
+     */
+    if (num == 0) {
+        (*nsds) = 0;
+        if (timeout > 0) {
+            apr_sleep(timeout);
+            return APR_TIMEUP;
+        }
+        return APR_SUCCESS;
+    }
+#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();
+    }
+
+    (*nsds) = 0;
+    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;
+        }
+        if (aprset[i].rtnevents) {
+            (*nsds)++;
+        }
+    }
+
+    return APR_SUCCESS;
+}
+
+#endif /* POLL_USES_SELECT */
+
+struct apr_pollset_private_t
+{
+    fd_set readset, writeset, exceptset;
+    int maxfd;
+    apr_pollfd_t *query_set;
+    apr_pollfd_t *result_set;
+    apr_uint32_t flags;
+#ifdef NETWARE
+    int set_type;
+#endif
+};
+
+static apr_status_t impl_pollset_create(apr_pollset_t *pollset,
+                                        apr_uint32_t size,
+                                        apr_pool_t *p,
+                                        apr_uint32_t flags)
+{
+    if (flags & APR_POLLSET_THREADSAFE) {                
+        pollset->p = NULL;
+        return APR_ENOTIMPL;
+    }
+#ifdef FD_SETSIZE
+    if (size > FD_SETSIZE) {
+        pollset->p = NULL;
+        return APR_EINVAL;
+    }
+#endif
+    pollset->p = apr_palloc(p, sizeof(apr_pollset_private_t));
+    FD_ZERO(&(pollset->p->readset));
+    FD_ZERO(&(pollset->p->writeset));
+    FD_ZERO(&(pollset->p->exceptset));
+    pollset->p->maxfd = 0;
+#ifdef NETWARE
+    pollset->p->set_type = APR_NO_DESC;
+#endif
+    pollset->p->query_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
+    pollset->p->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
+
+    return APR_SUCCESS;
+}
+
+static apr_status_t impl_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->p->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->p->set_type)) {
+            return APR_EBADF;
+        }
+        else {
+            pollset->p->set_type = APR_POLL_SOCKET;
+        }
+#endif
+        fd = descriptor->desc.s->socketdes;
+    }
+    else {
+#if !APR_FILES_AS_SOCKETS
+        if ((pollset->flags & APR_POLLSET_WAKEABLE) &&
+            descriptor->desc.f == pollset->wakeup_pipe[0])
+            fd = (apr_os_sock_t)descriptor->desc.f->filedes;
+        else
+            return APR_EBADF;
+#else
+#ifdef NETWARE
+        /* NetWare can't handle mixed descriptor types in select() */
+        if (descriptor->desc.f->is_pipe && !HAS_SOCKETS(pollset->p->set_type)) {
+            pollset->p->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->p->readset));
+    }
+    if (descriptor->reqevents & APR_POLLOUT) {
+        FD_SET(fd, &(pollset->p->writeset));
+    }
+    if (descriptor->reqevents &
+        (APR_POLLPRI | APR_POLLERR | APR_POLLHUP | APR_POLLNVAL)) {
+        FD_SET(fd, &(pollset->p->exceptset));
+    }
+    if ((int) fd > pollset->p->maxfd) {
+        pollset->p->maxfd = (int) fd;
+    }
+    pollset->nelts++;
+    return APR_SUCCESS;
+}
+
+static apr_status_t impl_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->p->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->p->query_set[i].desc.s) {
+                    pollset->nelts--;
+                }
+                else {
+                    pollset->p->query_set[dst] = pollset->p->query_set[i];
+                    dst++;
+                }
+            }
+            FD_CLR(fd, &(pollset->p->readset));
+            FD_CLR(fd, &(pollset->p->writeset));
+            FD_CLR(fd, &(pollset->p->exceptset));
+            if (((int) fd == pollset->p->maxfd) && (pollset->p->maxfd > 0)) {
+                pollset->p->maxfd--;
+            }
+            return APR_SUCCESS;
+        }
+    }
+
+    return APR_NOTFOUND;
+}
+
+static apr_status_t impl_pollset_poll(apr_pollset_t *pollset,
+                                      apr_interval_time_t timeout,
+                                      apr_int32_t *num,
+                                      const apr_pollfd_t **descriptors)
+{
+    int rs;
+    apr_uint32_t i, j;
+    struct timeval tv, *tvptr;
+    fd_set readset, writeset, exceptset;
+    apr_status_t rv = APR_SUCCESS;
+
+#ifdef WIN32
+    /* On Win32, select() must be presented with at least one socket to
+     * poll on, or select() will return WSAEINVAL.  So, we'll just
+     * short-circuit and bail now.
+     */
+    if (pollset->nelts == 0) {
+        (*num) = 0;
+        if (timeout > 0) {
+            apr_sleep(timeout);
+            return APR_TIMEUP;
+        }
+        return APR_SUCCESS;
+    }
+#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;
+    }
+
+    memcpy(&readset, &(pollset->p->readset), sizeof(fd_set));
+    memcpy(&writeset, &(pollset->p->writeset), sizeof(fd_set));
+    memcpy(&exceptset, &(pollset->p->exceptset), sizeof(fd_set));
+
+#ifdef NETWARE
+    if (HAS_PIPES(pollset->p->set_type)) {
+        rs = pipe_select(pollset->p->maxfd + 1, &readset, &writeset, &exceptset,
+                         tvptr);
+    }
+    else
+#endif
+        rs = select(pollset->p->maxfd + 1, &readset, &writeset, &exceptset,
+                    tvptr);
+
+    (*num) = rs;
+    if (rs < 0) {
+        return apr_get_netos_error();
+    }
+    if (rs == 0) {
+        return APR_TIMEUP;
+    }
+    j = 0;
+    for (i = 0; i < pollset->nelts; i++) {
+        apr_os_sock_t fd;
+        if (pollset->p->query_set[i].desc_type == APR_POLL_SOCKET) {
+            fd = pollset->p->query_set[i].desc.s->socketdes;
+        }
+        else {
+            if ((pollset->flags & APR_POLLSET_WAKEABLE) &&
+                pollset->p->query_set[i].desc.f == pollset->wakeup_pipe[0]) {
+                apr_pollset_drain_wakeup_pipe(pollset);
+                rv = APR_EINTR;
+                continue;
+            }
+            else {
+#if !APR_FILES_AS_SOCKETS
+                return APR_EBADF;
+#else
+                fd = pollset->p->query_set[i].desc.f->filedes;
+#endif
+            }
+        }
+        if (FD_ISSET(fd, &readset) || FD_ISSET(fd, &writeset) ||
+            FD_ISSET(fd, &exceptset)) {
+            pollset->p->result_set[j] = pollset->p->query_set[i];
+            pollset->p->result_set[j].rtnevents = 0;
+            if (FD_ISSET(fd, &readset)) {
+                pollset->p->result_set[j].rtnevents |= APR_POLLIN;
+            }
+            if (FD_ISSET(fd, &writeset)) {
+                pollset->p->result_set[j].rtnevents |= APR_POLLOUT;
+            }
+            if (FD_ISSET(fd, &exceptset)) {
+                pollset->p->result_set[j].rtnevents |= APR_POLLERR;
+            }
+            j++;
+        }
+    }
+    if (((*num) = j) != 0)
+        rv = APR_SUCCESS;
+
+    if (descriptors)
+        *descriptors = pollset->p->result_set;
+    return rv;
+}
+
+static apr_pollset_provider_t impl = {
+    impl_pollset_create,
+    impl_pollset_add,
+    impl_pollset_remove,
+    impl_pollset_poll,
+    NULL,
+    "select"
+};
+
+apr_pollset_provider_t *apr_pollset_provider_select = &impl;