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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 AF 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_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_arch_thread_mutex.h"
#include "apr_arch_thread_cond.h"
#include "apr_portable.h"
static apr_status_t thread_cond_cleanup(void *data)
{
apr_thread_cond_t *cond = data;
CloseHandle(cond->event);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
apr_pool_t *pool)
{
*cond = apr_palloc(pool, sizeof(**cond));
(*cond)->pool = pool;
(*cond)->event = CreateEvent(NULL, TRUE, FALSE, NULL);
(*cond)->signal_all = 0;
(*cond)->num_waiting = 0;
return APR_SUCCESS;
}
static APR_INLINE apr_status_t _thread_cond_timedwait(apr_thread_cond_t *cond,
apr_thread_mutex_t *mutex,
DWORD timeout_ms )
{
DWORD res;
while (1) {
cond->num_waiting++;
apr_thread_mutex_unlock(mutex);
res = WaitForSingleObject(cond->event, timeout_ms);
apr_thread_mutex_lock(mutex);
cond->num_waiting--;
if (res != WAIT_OBJECT_0) {
apr_status_t rv = apr_get_os_error();
if (res == WAIT_TIMEOUT) {
return APR_TIMEUP;
}
return apr_get_os_error();
}
if (cond->signal_all) {
if (cond->num_waiting == 0) {
cond->signal_all = 0;
cond->signalled = 0;
ResetEvent(cond->event);
}
break;
}
else if (cond->signalled) {
cond->signalled = 0;
ResetEvent(cond->event);
break;
}
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
apr_thread_mutex_t *mutex)
{
return _thread_cond_timedwait(cond, mutex, INFINITE);
}
APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
apr_thread_mutex_t *mutex,
apr_interval_time_t timeout)
{
DWORD timeout_ms = (DWORD) apr_time_as_msec(timeout);
return _thread_cond_timedwait(cond, mutex, timeout_ms);
}
APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
{
apr_status_t rv = APR_SUCCESS;
DWORD res;
cond->signalled = 1;
res = SetEvent(cond->event);
if (res == 0) {
rv = apr_get_os_error();
}
return rv;
}
APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
{
apr_status_t rv = APR_SUCCESS;
DWORD res;
cond->signalled = 1;
cond->signal_all = 1;
res = SetEvent(cond->event);
if (res == 0) {
rv = apr_get_os_error();
}
return rv;
}
APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
{
return apr_pool_cleanup_run(cond->pool, cond, thread_cond_cleanup);
}
APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)
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