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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 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_arch_thread_rwlock.h"
#include "apr_private.h"
#if APR_HAS_THREADS
#ifdef HAVE_PTHREAD_RWLOCKS
static apr_status_t thread_rwlock_cleanup(void *data)
{
apr_thread_rwlock_t *rwlock = (apr_thread_rwlock_t *)data;
apr_status_t stat;
pthread_rwlock_unlock(rwlock->rwlock);
stat = pthread_rwlock_destroy(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
apr_pool_t *pool)
{
apr_thread_rwlock_t *new_rwlock;
apr_status_t stat;
new_rwlock = (apr_thread_rwlock_t *)apr_pcalloc(pool,
sizeof(apr_thread_rwlock_t));
if (new_rwlock == NULL) {
return APR_ENOMEM;
}
new_rwlock->pool = pool;
new_rwlock->rwlock = (pthread_rwlock_t *)apr_palloc(pool,
sizeof(pthread_rwlock_t));
if (new_rwlock->rwlock == NULL) {
return APR_ENOMEM;
}
if ((stat = pthread_rwlock_init(new_rwlock->rwlock, NULL))) {
#ifdef PTHREAD_SETS_ERRNO
stat = errno;
#endif
thread_rwlock_cleanup(new_rwlock);
return stat;
}
apr_pool_cleanup_register(new_rwlock->pool,
(void *)new_rwlock, thread_rwlock_cleanup,
apr_pool_cleanup_null);
*rwlock = new_rwlock;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
stat = pthread_rwlock_rdlock(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
stat = pthread_rwlock_tryrdlock(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
/* Normalize the return code. */
if (stat == EBUSY)
stat = APR_EBUSY;
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
stat = pthread_rwlock_wrlock(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
stat = pthread_rwlock_trywrlock(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
/* Normalize the return code. */
if (stat == EBUSY)
stat = APR_EBUSY;
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
stat = pthread_rwlock_unlock(rwlock->rwlock);
#ifdef PTHREAD_SETS_ERRNO
if (stat) {
stat = errno;
}
#endif
return stat;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
{
apr_status_t stat;
if ((stat = thread_rwlock_cleanup(rwlock)) == APR_SUCCESS) {
apr_pool_cleanup_kill(rwlock->pool, rwlock, thread_rwlock_cleanup);
return APR_SUCCESS;
}
return stat;
}
#else /* HAVE_PTHREAD_RWLOCKS */
APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
apr_pool_t *pool)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
{
return APR_ENOTIMPL;
}
#endif /* HAVE_PTHREAD_RWLOCKS */
APR_POOL_IMPLEMENT_ACCESSOR(thread_rwlock)
#endif /* APR_HAS_THREADS */
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