| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 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. |
| 8 | |
| 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. |
| 13 | |
| 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/>. */ |
| 17 | |
| 18 | #ifndef _SYS_SEM_H |
| 19 | #define _SYS_SEM_H 1 |
| 20 | |
| 21 | #include <features.h> |
| 22 | |
| 23 | #define __need_size_t |
| 24 | #include <stddef.h> |
| 25 | |
| 26 | /* Get common definition of System V style IPC. */ |
| 27 | #include <sys/ipc.h> |
| 28 | |
| 29 | /* Get system dependent definition of `struct semid_ds' and more. */ |
| 30 | #include <bits/sem.h> |
| 31 | |
| 32 | #ifdef __USE_GNU |
| 33 | # define __need_timespec |
| 34 | # include <time.h> |
| 35 | #endif |
| 36 | |
| 37 | /* The following System V style IPC functions implement a semaphore |
| 38 | handling. The definition is found in XPG2. */ |
| 39 | |
| 40 | /* Structure used for argument to `semop' to describe operations. */ |
| 41 | struct sembuf |
| 42 | { |
| 43 | unsigned short int sem_num; /* semaphore number */ |
| 44 | short int sem_op; /* semaphore operation */ |
| 45 | short int sem_flg; /* operation flag */ |
| 46 | }; |
| 47 | |
| 48 | |
| 49 | __BEGIN_DECLS |
| 50 | |
| 51 | /* Semaphore control operation. */ |
| 52 | extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW; |
| 53 | |
| 54 | /* Get semaphore. */ |
| 55 | extern int semget (key_t __key, int __nsems, int __semflg) __THROW; |
| 56 | |
| 57 | /* Operate on semaphore. */ |
| 58 | extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW; |
| 59 | |
| 60 | #ifdef __USE_GNU |
| 61 | /* Operate on semaphore with timeout. */ |
| 62 | extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops, |
| 63 | const struct timespec *__timeout) __THROW; |
| 64 | #endif |
| 65 | |
| 66 | __END_DECLS |
| 67 | |
| 68 | #endif /* sys/sem.h */ |