cvs commit: apr-util/include apr_anylock.h

[wr...@apache.org]

wrowe       02/01/07 22:13:51

  Added:       include  apr_anylock.h
  Log:
    This trivial lock wrapper implements our apr lock types that will not be
    deprecated in the near future.  It supports only lock, trylock and unlock
    since that's as portable as we need for lock abstration.  If you need to
    dig deeper, you need to use the explicit lock api.
  
    This is implemented for apr_rmm.c, so it has found it's home here.  If it
    turns out to be useful to an apr portability module, we can always slide
    it over to apr/include.
  
  Revision  Changes    Path
  1.1                  apr-util/include/apr_anylock.h
  
  Index: apr_anylock.h
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2000-2001 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.
   *
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   *    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.
   *
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   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * 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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   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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   * ====================================================================
   *
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   */
  
  /**
   * @file apr_ring.h
   * @brief APR-Util Rings
   */
  #ifndef APR_ANYLOCK_H
  #define APR_ANYLOCK_H
  
  #include "apr_proc_mutex.h"
  #include "apr_thread_mutex.h"
  #include "apr_thread_rwlock.h"
  
  typedef struct apr_anylock_t {
      enum tm_lock {
          apr_anylock_none,
          apr_anylock_procmutex,
          apr_anylock_threadmutex,
          apr_anylock_readlock,
          apr_anylock_writelock
      } type;
      union apr_anylock_u_t {
          apr_proc_mutex_t *pm;
          apr_thread_mutex_t *tm;
          apr_thread_rwlock_t *rw;
      } lock;
  } apr_anylock_t;
  
  #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)))))
  
  #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)))))
  
  #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))))
  
  
  #endif /* !APR_ANYLOCK_H */