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, see
16 <http://www.gnu.org/licenses/>. */
26 /* Get common definition of System V style IPC. */
29 /* Get system dependent definition of `struct semid_ds' and more. */
33 # define __need_timespec
37 /* The following System V style IPC functions implement a semaphore
38 handling. The definition is found in XPG2. */
40 /* Structure used for argument to `semop' to describe operations. */
43 unsigned short int sem_num; /* semaphore number */
44 short int sem_op; /* semaphore operation */
45 short int sem_flg; /* operation flag */
51 /* Semaphore control operation. */
52 extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW;
55 extern int semget (key_t __key, int __nsems, int __semflg) __THROW;
57 /* Operate on semaphore. */
58 extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW;
61 /* Operate on semaphore with timeout. */
62 extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops,
63 const struct timespec *__timeout) __THROW;
68 #endif /* sys/sem.h */