diff options
Diffstat (limited to 'locks/unix/thread_rwlock.c')
| -rw-r--r-- | locks/unix/thread_rwlock.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/locks/unix/thread_rwlock.c b/locks/unix/thread_rwlock.c new file mode 100644 index 0000000..0f8b7a7 --- /dev/null +++ b/locks/unix/thread_rwlock.c @@ -0,0 +1,181 @@ +/* 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 + +/* The rwlock must be initialized but not locked by any thread when + * cleanup is called. */ +static apr_status_t thread_rwlock_cleanup(void *data) +{ + apr_thread_rwlock_t *rwlock = (apr_thread_rwlock_t *)data; + apr_status_t stat; + + stat = pthread_rwlock_destroy(&rwlock->rwlock); +#ifdef HAVE_ZOS_PTHREADS + 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_palloc(pool, sizeof(apr_thread_rwlock_t)); + new_rwlock->pool = pool; + + if ((stat = pthread_rwlock_init(&new_rwlock->rwlock, NULL))) { +#ifdef HAVE_ZOS_PTHREADS + stat = errno; +#endif + 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 HAVE_ZOS_PTHREADS + 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 HAVE_ZOS_PTHREADS + 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 HAVE_ZOS_PTHREADS + 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 HAVE_ZOS_PTHREADS + 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 HAVE_ZOS_PTHREADS + if (stat) { + stat = errno; + } +#endif + return stat; +} + +APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock) +{ + return apr_pool_cleanup_run(rwlock->pool, rwlock, thread_rwlock_cleanup); +} + +#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 */ |