mirror of https://gitee.com/openkylin/apr.git
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
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/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr.h"
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#include "apr_poll.h"
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#include "apr_arch_networkio.h"
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APR_DECLARE(apr_status_t) apr_poll(apr_pollfd_t *aprset, apr_int32_t num,
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apr_int32_t *nsds, apr_interval_time_t timeout)
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{
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int *pollset;
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int i;
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int num_read = 0, num_write = 0, num_except = 0, num_total;
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int pos_read, pos_write, pos_except;
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for (i = 0; i < num; i++) {
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if (aprset[i].desc_type == APR_POLL_SOCKET) {
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num_read += (aprset[i].reqevents & APR_POLLIN) != 0;
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num_write += (aprset[i].reqevents & APR_POLLOUT) != 0;
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num_except += (aprset[i].reqevents & APR_POLLPRI) != 0;
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}
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}
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num_total = num_read + num_write + num_except;
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pollset = alloca(sizeof(int) * num_total);
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memset(pollset, 0, sizeof(int) * num_total);
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pos_read = 0;
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pos_write = num_read;
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pos_except = pos_write + num_write;
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for (i = 0; i < num; i++) {
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if (aprset[i].desc_type == APR_POLL_SOCKET) {
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if (aprset[i].reqevents & APR_POLLIN) {
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pollset[pos_read++] = aprset[i].desc.s->socketdes;
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}
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if (aprset[i].reqevents & APR_POLLOUT) {
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pollset[pos_write++] = aprset[i].desc.s->socketdes;
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}
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if (aprset[i].reqevents & APR_POLLPRI) {
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pollset[pos_except++] = aprset[i].desc.s->socketdes;
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}
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aprset[i].rtnevents = 0;
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}
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}
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if (timeout > 0) {
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timeout /= 1000; /* convert microseconds to milliseconds */
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}
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i = select(pollset, num_read, num_write, num_except, timeout);
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(*nsds) = i;
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if ((*nsds) < 0) {
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return APR_FROM_OS_ERROR(sock_errno());
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}
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if ((*nsds) == 0) {
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return APR_TIMEUP;
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}
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pos_read = 0;
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pos_write = num_read;
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pos_except = pos_write + num_write;
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for (i = 0; i < num; i++) {
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if (aprset[i].desc_type == APR_POLL_SOCKET) {
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if (aprset[i].reqevents & APR_POLLIN) {
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if (pollset[pos_read++] > 0) {
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aprset[i].rtnevents |= APR_POLLIN;
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}
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}
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if (aprset[i].reqevents & APR_POLLOUT) {
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if (pollset[pos_write++] > 0) {
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aprset[i].rtnevents |= APR_POLLOUT;
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}
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}
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if (aprset[i].reqevents & APR_POLLPRI) {
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if (pollset[pos_except++] > 0) {
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aprset[i].rtnevents |= APR_POLLPRI;
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}
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}
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}
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}
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return APR_SUCCESS;
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}
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