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d614a753 | 1 | /* Copyright (C) 1995-2020 Free Software Foundation, Inc. |
8a4b65b4 | 2 | This file is part of the GNU C Library. |
60478656 | 3 | |
8a4b65b4 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
60478656 | 8 | |
8a4b65b4 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
60478656 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
60478656 RM |
17 | |
18 | #ifndef _SYS_SEM_H | |
8a4b65b4 | 19 | #define _SYS_SEM_H 1 |
5107cf1d | 20 | |
60478656 | 21 | #include <features.h> |
8a4b65b4 | 22 | |
219aa9e9 UD |
23 | #define __need_size_t |
24 | #include <stddef.h> | |
60478656 RM |
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. */ | |
5107cf1d | 30 | #include <bits/sem.h> |
60478656 | 31 | |
d903678a | 32 | #ifdef __USE_GNU |
05b68e14 | 33 | # include <bits/types/struct_timespec.h> |
d903678a UD |
34 | #endif |
35 | ||
60478656 RM |
36 | /* The following System V style IPC functions implement a semaphore |
37 | handling. The definition is found in XPG2. */ | |
38 | ||
39 | /* Structure used for argument to `semop' to describe operations. */ | |
40 | struct sembuf | |
41 | { | |
0ed99ce4 | 42 | unsigned short int sem_num; /* semaphore number */ |
60478656 RM |
43 | short int sem_op; /* semaphore operation */ |
44 | short int sem_flg; /* operation flag */ | |
45 | }; | |
46 | ||
47 | ||
f4017d20 UD |
48 | __BEGIN_DECLS |
49 | ||
60478656 | 50 | /* Semaphore control operation. */ |
c1422e5b | 51 | extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW; |
60478656 RM |
52 | |
53 | /* Get semaphore. */ | |
c1422e5b | 54 | extern int semget (key_t __key, int __nsems, int __semflg) __THROW; |
60478656 RM |
55 | |
56 | /* Operate on semaphore. */ | |
c1422e5b | 57 | extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW; |
60478656 | 58 | |
d903678a UD |
59 | #ifdef __USE_GNU |
60 | /* Operate on semaphore with timeout. */ | |
61 | extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops, | |
a784e502 | 62 | const struct timespec *__timeout) __THROW; |
d903678a UD |
63 | #endif |
64 | ||
60478656 RM |
65 | __END_DECLS |
66 | ||
5107cf1d | 67 | #endif /* sys/sem.h */ |