2 * Copyright (c) 2013 Larisa Grigore <larisagrigore@gmail.com>.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by Adam Glass and Charles
16 * 4. The names of the authors may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _SYSVIPC_SHM_H_
32 #define _SYSVIPC_SHM_H_
36 /* This flag is used to mark a semaphore group
37 * as removed by another process.
39 #define SEG_ALREADY_REMOVED 2
42 int fd; /* The file descriptor of the file used as
46 int type; /* shm, sem, msg or undo;
47 undo segments are used for semops with UNDO flag set. */
49 int used; /* Number of thread that use this segment. */
50 int removed; /* The segment was mark for removal by a thread. */
51 int access; /* Used only for sems to avoid a segfault when try to
52 access a semaphore wthout permission. */
55 int _shmget(key_t, size_t, int, int);
58 int sysvipc_shmget(key_t, size_t, int);
59 int sysvipc_shmctl(int, int, struct shmid_ds *);
60 void *sysvipc_shmat(int, const void *, int);
61 int sysvipc_shmdt(const void *);
63 struct shm_data *get_shmdata(int, int, int);
64 int set_shmdata_access(int, int);
66 #endif /* !_SYSVIPC_SHM_H_ */