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-rw-r--r--poll/os2/pollset.c321
1 files changed, 321 insertions, 0 deletions
diff --git a/poll/os2/pollset.c b/poll/os2/pollset.c
new file mode 100644
index 0000000..87b3c18
--- /dev/null
+++ b/poll/os2/pollset.c
@@ -0,0 +1,321 @@
+/* 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_arch_networkio.h"
+
+#ifndef MSG_DONTWAIT
+#define MSG_DONTWAIT 0x100
+#endif
+
+struct apr_pollset_t {
+ apr_pool_t *pool;
+ apr_uint32_t nelts;
+ apr_uint32_t nalloc;
+ int *pollset;
+ int num_read;
+ int num_write;
+ int num_except;
+ int num_total;
+ apr_pollfd_t *query_set;
+ apr_pollfd_t *result_set;
+ apr_socket_t *wake_listen;
+ apr_socket_t *wake_sender;
+ apr_sockaddr_t *wake_address;
+};
+
+
+
+APR_DECLARE(apr_status_t) apr_pollset_create(apr_pollset_t **pollset,
+ apr_uint32_t size,
+ apr_pool_t *p,
+ apr_uint32_t flags)
+{
+ apr_status_t rc = APR_SUCCESS;
+
+ if (flags & APR_POLLSET_WAKEABLE) {
+ size++;
+ }
+
+ *pollset = apr_palloc(p, sizeof(**pollset));
+ (*pollset)->pool = p;
+ (*pollset)->nelts = 0;
+ (*pollset)->nalloc = size;
+ (*pollset)->pollset = apr_palloc(p, size * sizeof(int) * 3);
+ (*pollset)->query_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
+ (*pollset)->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t));
+ (*pollset)->num_read = -1;
+ (*pollset)->wake_listen = NULL;
+ (*pollset)->wake_sender = NULL;
+
+ if (flags & APR_POLLSET_WAKEABLE) {
+ rc = apr_socket_create(&(*pollset)->wake_listen, APR_UNIX, SOCK_DGRAM, 0, p);
+
+ if (rc == APR_SUCCESS) {
+ apr_sockaddr_t *listen_address;
+ apr_socket_timeout_set((*pollset)->wake_listen, 0);
+ apr_sockaddr_info_get(&listen_address, "", APR_UNIX, 0, 0, p);
+ rc = apr_socket_bind((*pollset)->wake_listen, listen_address);
+
+ if (rc == APR_SUCCESS) {
+ apr_pollfd_t wake_poll_fd;
+ wake_poll_fd.p = p;
+ wake_poll_fd.desc_type = APR_POLL_SOCKET;
+ wake_poll_fd.reqevents = APR_POLLIN;
+ wake_poll_fd.desc.s = (*pollset)->wake_listen;
+ wake_poll_fd.client_data = NULL;
+ apr_pollset_add(*pollset, &wake_poll_fd);
+ apr_socket_addr_get(&(*pollset)->wake_address, APR_LOCAL, (*pollset)->wake_listen);
+
+ rc = apr_socket_create(&(*pollset)->wake_sender, APR_UNIX, SOCK_DGRAM, 0, p);
+ }
+ }
+ }
+
+ return rc;
+}
+
+APR_DECLARE(apr_status_t) apr_pollset_create_ex(apr_pollset_t **pollset,
+ apr_uint32_t size,
+ apr_pool_t *p,
+ apr_uint32_t flags,
+ apr_pollset_method_e method)
+{
+ /* Only one method is supported */
+ if (flags & APR_POLLSET_NODEFAULT) {
+ if (method != APR_POLLSET_DEFAULT && method != APR_POLLSET_POLL) {
+ return APR_ENOTIMPL;
+ }
+ }
+
+ return apr_pollset_create(pollset, size, p, flags);
+}
+
+APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t *pollset)
+{
+ /* A no-op function for now. If we later implement /dev/poll
+ * support, we'll need to close the /dev/poll fd here
+ */
+ return APR_SUCCESS;
+}
+
+
+
+APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset,
+ const apr_pollfd_t *descriptor)
+{
+ if (pollset->nelts == pollset->nalloc) {
+ return APR_ENOMEM;
+ }
+
+ pollset->query_set[pollset->nelts] = *descriptor;
+
+ if (descriptor->desc_type != APR_POLL_SOCKET) {
+ return APR_EBADF;
+ }
+
+ pollset->nelts++;
+ pollset->num_read = -1;
+ return APR_SUCCESS;
+}
+
+
+
+APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t *pollset,
+ const apr_pollfd_t *descriptor)
+{
+ apr_uint32_t i;
+
+ 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->pollset[dst] = pollset->pollset[i];
+ pollset->query_set[dst] = pollset->query_set[i];
+ dst++;
+ }
+ }
+
+ pollset->num_read = -1;
+ return APR_SUCCESS;
+ }
+ }
+
+ return APR_NOTFOUND;
+}
+
+
+
+static void make_pollset(apr_pollset_t *pollset)
+{
+ int i;
+ int pos = 0;
+
+ pollset->num_read = 0;
+ pollset->num_write = 0;
+ pollset->num_except = 0;
+
+ for (i = 0; i < pollset->nelts; i++) {
+ if (pollset->query_set[i].reqevents & APR_POLLIN) {
+ pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes;
+ pollset->num_read++;
+ }
+ }
+
+ for (i = 0; i < pollset->nelts; i++) {
+ if (pollset->query_set[i].reqevents & APR_POLLOUT) {
+ pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes;
+ pollset->num_write++;
+ }
+ }
+
+ for (i = 0; i < pollset->nelts; i++) {
+ if (pollset->query_set[i].reqevents & APR_POLLPRI) {
+ pollset->pollset[pos++] = pollset->query_set[i].desc.s->socketdes;
+ pollset->num_except++;
+ }
+ }
+
+ pollset->num_total = pollset->num_read + pollset->num_write + pollset->num_except;
+}
+
+
+
+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;
+ int *pollresult;
+ int read_pos, write_pos, except_pos;
+ apr_status_t rc = APR_SUCCESS;
+
+ if (pollset->num_read < 0) {
+ make_pollset(pollset);
+ }
+
+ pollresult = alloca(sizeof(int) * pollset->num_total);
+ memcpy(pollresult, pollset->pollset, sizeof(int) * pollset->num_total);
+ (*num) = 0;
+
+ if (timeout > 0) {
+ timeout /= 1000;
+ }
+
+ rv = select(pollresult, pollset->num_read, pollset->num_write, pollset->num_except, timeout);
+
+ if (rv < 0) {
+ return APR_FROM_OS_ERROR(sock_errno());
+ }
+
+ if (rv == 0) {
+ return APR_TIMEUP;
+ }
+
+ read_pos = 0;
+ write_pos = pollset->num_read;
+ except_pos = pollset->num_read + pollset->num_write;
+
+ for (i = 0; i < pollset->nelts; i++) {
+ int rtnevents = 0;
+
+ if (pollset->query_set[i].reqevents & APR_POLLIN) {
+ if (pollresult[read_pos++] != -1) {
+ rtnevents |= APR_POLLIN;
+ }
+ }
+
+ if (pollset->query_set[i].reqevents & APR_POLLOUT) {
+ if (pollresult[write_pos++] != -1) {
+ rtnevents |= APR_POLLOUT;
+ }
+ }
+
+ if (pollset->query_set[i].reqevents & APR_POLLPRI) {
+ if (pollresult[except_pos++] != -1) {
+ rtnevents |= APR_POLLPRI;
+ }
+ }
+
+ if (rtnevents) {
+ if (i == 0 && pollset->wake_listen != NULL) {
+ struct apr_sockaddr_t from_addr;
+ char buffer[16];
+ apr_size_t buflen;
+ for (;;) {
+ buflen = sizeof(buffer);
+ rv = apr_socket_recvfrom(&from_addr, pollset->wake_listen,
+ MSG_DONTWAIT, buffer, &buflen);
+ if (rv != APR_SUCCESS) {
+ break;
+ }
+ /* Woken up, drain the pipe still. */
+ rc = APR_EINTR;
+ }
+ }
+ else {
+ pollset->result_set[*num] = pollset->query_set[i];
+ pollset->result_set[*num].rtnevents = rtnevents;
+ /* Event(s) besides wakeup pipe. */
+ rc = APR_SUCCESS;
+ (*num)++;
+ }
+ }
+ }
+
+ if (descriptors) {
+ *descriptors = pollset->result_set;
+ }
+
+ return rc;
+}
+
+
+
+APR_DECLARE(apr_status_t) apr_pollset_wakeup(apr_pollset_t *pollset)
+{
+ if (pollset->wake_sender) {
+ apr_size_t len = 1;
+ return apr_socket_sendto(pollset->wake_sender, pollset->wake_address, 0, "", &len);
+ }
+
+ return APR_EINIT;
+}
+
+
+
+APR_DECLARE(const char *) apr_poll_method_defname(void)
+{
+ return "select";
+}
+
+
+
+APR_DECLARE(const char *) apr_pollset_method_name(apr_pollset_t *pollset)
+{
+ return "select";
+}
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