139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/* 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_arch_thread_mutex.h"
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#define APR_WANT_MEMFUNC
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#include "apr_want.h"
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#if APR_HAS_THREADS
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static apr_status_t thread_mutex_cleanup(void *data)
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{
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apr_thread_mutex_t *mutex = data;
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apr_status_t rv;
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rv = pthread_mutex_destroy(&mutex->mutex);
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#ifdef PTHREAD_SETS_ERRNO
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if (rv) {
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rv = errno;
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}
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#endif
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex,
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unsigned int flags,
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apr_pool_t *pool)
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{
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apr_thread_mutex_t *new_mutex;
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apr_status_t rv;
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#ifndef HAVE_PTHREAD_MUTEX_RECURSIVE
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if (flags & APR_THREAD_MUTEX_NESTED) {
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return APR_ENOTIMPL;
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}
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#endif
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new_mutex = apr_pcalloc(pool, sizeof(apr_thread_mutex_t));
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new_mutex->pool = pool;
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#ifdef HAVE_PTHREAD_MUTEX_RECURSIVE
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if (flags & APR_THREAD_MUTEX_NESTED) {
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pthread_mutexattr_t mattr;
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rv = pthread_mutexattr_init(&mattr);
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if (rv) return rv;
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rv = pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
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if (rv) {
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pthread_mutexattr_destroy(&mattr);
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return rv;
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}
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rv = pthread_mutex_init(&new_mutex->mutex, &mattr);
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pthread_mutexattr_destroy(&mattr);
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} else
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#endif
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rv = pthread_mutex_init(&new_mutex->mutex, NULL);
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if (rv) {
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#ifdef PTHREAD_SETS_ERRNO
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rv = errno;
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#endif
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return rv;
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}
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apr_pool_cleanup_register(new_mutex->pool,
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new_mutex, thread_mutex_cleanup,
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apr_pool_cleanup_null);
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*mutex = new_mutex;
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex)
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{
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apr_status_t rv;
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rv = pthread_mutex_lock(&mutex->mutex);
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#ifdef PTHREAD_SETS_ERRNO
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if (rv) {
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rv = errno;
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}
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#endif
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
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{
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apr_status_t rv;
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rv = pthread_mutex_trylock(&mutex->mutex);
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if (rv) {
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#ifdef PTHREAD_SETS_ERRNO
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rv = errno;
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#endif
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return (rv == EBUSY) ? APR_EBUSY : rv;
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}
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
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{
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apr_status_t status;
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status = pthread_mutex_unlock(&mutex->mutex);
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#ifdef PTHREAD_SETS_ERRNO
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if (status) {
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status = errno;
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}
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#endif
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return status;
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}
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APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
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{
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return apr_pool_cleanup_run(mutex->pool, mutex, thread_mutex_cleanup);
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}
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APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
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#endif /* APR_HAS_THREADS */
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