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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.
*/
/**
* @file apr_anylock.h
* @brief APR-Util transparent any lock flavor wrapper
*/
#ifndef APR_ANYLOCK_H
#define APR_ANYLOCK_H
#include "apr_proc_mutex.h"
#include "apr_thread_mutex.h"
#include "apr_thread_rwlock.h"
/** Structure that may contain any APR lock type */
typedef struct apr_anylock_t {
/** Indicates what type of lock is in lock */
enum tm_lock {
apr_anylock_none, /**< None */
apr_anylock_procmutex, /**< Process-based */
apr_anylock_threadmutex, /**< Thread-based */
apr_anylock_readlock, /**< Read lock */
apr_anylock_writelock /**< Write lock */
} type;
/** Union of all possible APR locks */
union apr_anylock_u_t {
apr_proc_mutex_t *pm; /**< Process mutex */
#if APR_HAS_THREADS
apr_thread_mutex_t *tm; /**< Thread mutex */
apr_thread_rwlock_t *rw; /**< Read-write lock */
#endif
} lock;
} apr_anylock_t;
#if APR_HAS_THREADS
/** Lock an apr_anylock_t structure */
#define APR_ANYLOCK_LOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_threadmutex) \
? apr_thread_mutex_lock((lck)->lock.tm) \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_lock((lck)->lock.pm) \
: (((lck)->type == apr_anylock_readlock) \
? apr_thread_rwlock_rdlock((lck)->lock.rw) \
: (((lck)->type == apr_anylock_writelock) \
? apr_thread_rwlock_wrlock((lck)->lock.rw) \
: APR_EINVAL)))))
#else /* APR_HAS_THREADS */
#define APR_ANYLOCK_LOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_lock((lck)->lock.pm) \
: APR_EINVAL))
#endif /* APR_HAS_THREADS */
#if APR_HAS_THREADS
/** Try to lock an apr_anylock_t structure */
#define APR_ANYLOCK_TRYLOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_threadmutex) \
? apr_thread_mutex_trylock((lck)->lock.tm) \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_trylock((lck)->lock.pm) \
: (((lck)->type == apr_anylock_readlock) \
? apr_thread_rwlock_tryrdlock((lck)->lock.rw) \
: (((lck)->type == apr_anylock_writelock) \
? apr_thread_rwlock_trywrlock((lck)->lock.rw) \
: APR_EINVAL)))))
#else /* APR_HAS_THREADS */
#define APR_ANYLOCK_TRYLOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_trylock((lck)->lock.pm) \
: APR_EINVAL))
#endif /* APR_HAS_THREADS */
#if APR_HAS_THREADS
/** Unlock an apr_anylock_t structure */
#define APR_ANYLOCK_UNLOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_threadmutex) \
? apr_thread_mutex_unlock((lck)->lock.tm) \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_unlock((lck)->lock.pm) \
: ((((lck)->type == apr_anylock_readlock) || \
((lck)->type == apr_anylock_writelock)) \
? apr_thread_rwlock_unlock((lck)->lock.rw) \
: APR_EINVAL))))
#else /* APR_HAS_THREADS */
#define APR_ANYLOCK_UNLOCK(lck) \
(((lck)->type == apr_anylock_none) \
? APR_SUCCESS \
: (((lck)->type == apr_anylock_procmutex) \
? apr_proc_mutex_unlock((lck)->lock.pm) \
: APR_EINVAL))
#endif /* APR_HAS_THREADS */
#endif /* !APR_ANYLOCK_H */