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apr_arch_shm.h
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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 
61 struct apr_shm_t {
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 */
size_t apr_size_t
Definition: apr.h:375
void * base
Definition: apr_arch_shm.h:63
apr_pool_t * pool
Definition: apr_arch_shm.h:62
APR Network library.
Definition: apr_arch_shm.h:61
APR File I/O Handling.
apr_size_t realsize
Definition: apr_arch_shm.h:66
APR Miscellaneous library routines.
apr_size_t reqsize
Definition: apr_arch_shm.h:65
APR memory allocation.
APR Shared Memory Routines.
const char * filename
Definition: apr_arch_shm.h:67
APR Platform Definitions.
APR general purpose library routines.
void * usable
Definition: apr_arch_shm.h:64
struct apr_pool_t apr_pool_t
Definition: apr_pools.h:60
APR Portability Routines.