1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "apr_arch_thread_rwlock.h"
18 #include "apr_private.h"
22 #ifdef HAVE_PTHREAD_RWLOCKS
24 /* The rwlock must be initialized but not locked by any thread when
25 * cleanup is called. */
26 static apr_status_t thread_rwlock_cleanup(void *data)
28 apr_thread_rwlock_t *rwlock = (apr_thread_rwlock_t *)data;
31 stat = pthread_rwlock_destroy(&rwlock->rwlock);
32 #ifdef HAVE_ZOS_PTHREADS
40 APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
43 apr_thread_rwlock_t *new_rwlock;
46 new_rwlock = apr_palloc(pool, sizeof(apr_thread_rwlock_t));
47 new_rwlock->pool = pool;
49 if ((stat = pthread_rwlock_init(&new_rwlock->rwlock, NULL))) {
50 #ifdef HAVE_ZOS_PTHREADS
56 apr_pool_cleanup_register(new_rwlock->pool,
57 (void *)new_rwlock, thread_rwlock_cleanup,
58 apr_pool_cleanup_null);
64 APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
68 stat = pthread_rwlock_rdlock(&rwlock->rwlock);
69 #ifdef HAVE_ZOS_PTHREADS
77 APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
81 stat = pthread_rwlock_tryrdlock(&rwlock->rwlock);
82 #ifdef HAVE_ZOS_PTHREADS
87 /* Normalize the return code. */
93 APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
97 stat = pthread_rwlock_wrlock(&rwlock->rwlock);
98 #ifdef HAVE_ZOS_PTHREADS
106 APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
110 stat = pthread_rwlock_trywrlock(&rwlock->rwlock);
111 #ifdef HAVE_ZOS_PTHREADS
116 /* Normalize the return code. */
122 APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
126 stat = pthread_rwlock_unlock(&rwlock->rwlock);
127 #ifdef HAVE_ZOS_PTHREADS
135 APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
137 return apr_pool_cleanup_run(rwlock->pool, rwlock, thread_rwlock_cleanup);
140 #else /* HAVE_PTHREAD_RWLOCKS */
142 APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
148 APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
153 APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
158 APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
163 APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
168 APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
173 APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
178 #endif /* HAVE_PTHREAD_RWLOCKS */
179 APR_POOL_IMPLEMENT_ACCESSOR(thread_rwlock)
181 #endif /* APR_HAS_THREADS */