1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SHM_H
18#define SHM_H
19
20#include "apr.h"
21#include "apr_private.h"
22#include "apr_general.h"
23#include "apr_lib.h"
24#include "apr_shm.h"
25#include "apr_pools.h"
26#include "apr_file_io.h"
27#include "apr_network_io.h"
28#include "apr_portable.h"
29
30#if APR_HAVE_UNISTD_H
31#include <unistd.h>
32#endif
33#ifdef HAVE_SYS_MMAN_H
34#include <sys/mman.h>
35#endif
36#ifdef HAVE_SYS_IPC_H
37#include <sys/ipc.h>
38#endif
39#ifdef HAVE_SYS_MUTEX_H
40#include <sys/mutex.h>
41#endif
42#ifdef HAVE_SYS_SHM_H
43#include <sys/shm.h>
44#endif
45#if !defined(SHM_R)
46#define SHM_R 0400
47#endif
48#if !defined(SHM_W)
49#define SHM_W 0200
50#endif
51#ifdef HAVE_SYS_FILE_H
52#include <sys/file.h>
53#endif
54
55/* Not all systems seem to have MAP_FAILED defined, but it should always
56 * just be (void *)-1. */
57#ifndef MAP_FAILED
58#define MAP_FAILED ((void *)-1)
59#endif
60
61struct apr_shm_t {
62    apr_pool_t *pool;
63    void *base;          /* base real address */
64    void *usable;        /* base usable address */
65    apr_size_t reqsize;  /* requested segment size */
66    apr_size_t realsize; /* actual segment size */
67    const char *filename;      /* NULL if anonymous */
68#if APR_USE_SHMEM_SHMGET || APR_USE_SHMEM_SHMGET_ANON
69    int shmid;          /* shmem ID returned from shmget() */
70    key_t shmkey;       /* shmem key IPC_ANON or returned from ftok() */
71#endif
72};
73
74#endif /* SHM_H */
75