text: /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2000-2002 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",
   *    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,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * 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/>.
   */
  
  #ifndef SHM_H
  #define SHM_H
  
  #include "apr.h"
  #include "apr_private.h"
  #include "apr_general.h"
  #include "apr_lib.h"
  #include "apr_shm.h"
  #include "apr_pools.h"
  #include "apr_file_io.h"
  #include "apr_network_io.h"
  #include "apr_portable.h"
  
  #ifdef HAVE_SYS_MMAN_H
  #include <sys/mman.h>
  #endif
  #ifdef HAVE_SYS_IPC_H
  #include <sys/ipc.h>
  #endif
  #ifdef HAVE_SYS_SHM_H
  #include <sys/shm.h>
  #endif
  #if !defined(SHM_R)
  #define SHM_R 0400
  #endif
  #if !defined(SHM_W)
  #define SHM_W 0200
  #endif
  #ifdef HAVE_SYS_FILE_H
  #include <sys/file.h>
  #endif
  
  /* Not all systems seem to have MAP_FAILED defined, but it should always
   * just be (void *)-1. */
  #ifndef MAP_FAILED
  #define MAP_FAILED ((void *)-1)
  #endif
  
  struct apr_shm_t {
      apr_pool_t *pool;
      void *base;          /* base real address */
      void *usable;        /* base usable address */
      apr_size_t reqsize;  /* requested segment size */
      apr_size_t realsize; /* actual segment size */
      const char *filename;      /* NULL if anonymous */
  #if APR_USE_SHMEM_SHMGET || APR_USE_SHMEM_SHMGET_ANON
      int shmid;          /* shmem ID returned from shmget() */
  #endif
  };
  
  #endif /* SHM_H */
  