* sysdeps/unix/sysv/linux/getsysstats.c (next_line): Make sure there
[glibc.git] / sysvipc / sys / sem.h
blob24a57fc32e90b9b26cd97928d63c53762421b608
1 /* Copyright (C) 1995-1999, 2000, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #ifndef _SYS_SEM_H
20 #define _SYS_SEM_H 1
22 #include <features.h>
24 #define __need_size_t
25 #include <stddef.h>
27 /* Get common definition of System V style IPC. */
28 #include <sys/ipc.h>
30 /* Get system dependent definition of `struct semid_ds' and more. */
31 #include <bits/sem.h>
33 #ifdef __USE_GNU
34 # define __need_timespec
35 # include <time.h>
36 #endif
38 /* The following System V style IPC functions implement a semaphore
39 handling. The definition is found in XPG2. */
41 /* Structure used for argument to `semop' to describe operations. */
42 struct sembuf
44 unsigned short int sem_num; /* semaphore number */
45 short int sem_op; /* semaphore operation */
46 short int sem_flg; /* operation flag */
50 __BEGIN_DECLS
52 /* Semaphore control operation. */
53 extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW;
55 /* Get semaphore. */
56 extern int semget (key_t __key, int __nsems, int __semflg) __THROW;
58 /* Operate on semaphore. */
59 extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW;
61 #ifdef __USE_GNU
62 /* Operate on semaphore with timeout. */
63 extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops,
64 __const struct timespec *__timeout) __THROW;
65 #endif
67 __END_DECLS
69 #endif /* sys/sem.h */