| /* Copyright (C) 1995-1999, 2000, 2003 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_SEM_H |
| #define _SYS_SEM_H 1 |
| |
| #include <features.h> |
| |
| #define __need_size_t |
| #include <stddef.h> |
| |
| /* Get common definition of System V style IPC. */ |
| #include <sys/ipc.h> |
| |
| /* Get system dependent definition of `struct semid_ds' and more. */ |
| #include <bits/sem.h> |
| |
| #ifdef __USE_GNU |
| # define __need_timespec |
| # include <time.h> |
| #endif |
| |
| /* The following System V style IPC functions implement a semaphore |
| handling. The definition is found in XPG2. */ |
| |
| /* Structure used for argument to `semop' to describe operations. */ |
| struct sembuf |
| { |
| unsigned short int sem_num; /* semaphore number */ |
| short int sem_op; /* semaphore operation */ |
| short int sem_flg; /* operation flag */ |
| }; |
| |
| |
| __BEGIN_DECLS |
| |
| /* Semaphore control operation. */ |
| extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW; |
| |
| /* Get semaphore. */ |
| extern int semget (key_t __key, int __nsems, int __semflg) __THROW; |
| |
| /* Operate on semaphore. */ |
| extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW; |
| |
| #ifdef __USE_GNU |
| /* Operate on semaphore with timeout. */ |
| extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops, |
| const struct timespec *__timeout) __THROW; |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* sys/sem.h */ |
