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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/**
* @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 */
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