git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5107cf1d | 1 | /* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. |
| 6d52618b UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. | |
| 60478656 | 4 | |
| 6d52618b UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Library General Public License as | |
| 7 | published by the Free Software Foundation; either version 2 of the | |
| 8 | License, or (at your option) any later version. | |
| 60478656 | 9 | |
| 6d52618b UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Library General Public License for more details. | |
| 60478656 | 14 | |
| 6d52618b UD |
15 | You should have received a copy of the GNU Library General Public |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 18 | Boston, MA 02111-1307, USA. */ | |
| 60478656 | 19 | |
| 5107cf1d UD |
20 | #ifndef _SYS_SEM_H |
| 21 | #error "Never use <bits/sem.h> directly; include <sys/sem.h> instead." | |
| 22 | #endif | |
| 23 | ||
| 60478656 RM |
24 | |
| 25 | #include <features.h> | |
| 26 | #include <sys/types.h> | |
| 27 | ||
| 28 | /* Flags for `semop'. */ | |
| 29 | #define SEM_UNDO 0x1000 /* undo the operation on exit */ | |
| 30 | ||
| 31 | /* Commands for `semctl'. */ | |
| 32 | #define GETPID 11 /* get sempid */ | |
| 33 | #define GETVAL 12 /* get semval */ | |
| 34 | #define GETALL 13 /* get all semval's */ | |
| 35 | #define GETNCNT 14 /* get semncnt */ | |
| 36 | #define GETZCNT 15 /* get semzcnt */ | |
| 37 | #define SETVAL 16 /* set semval */ | |
| 38 | #define SETALL 17 /* set all semval's */ | |
| 39 | ||
| 40 | ||
| 41 | __BEGIN_DECLS | |
| 42 | ||
| 43 | /* Data structure describing a set of semaphores. */ | |
| 44 | struct semid_ds | |
| 45 | { | |
| 6d52618b | 46 | struct ipc_perm sem_perm; /* operation permission struct */ |
| 60478656 RM |
47 | __time_t sem_otime; /* last semop() time */ |
| 48 | __time_t sem_ctime; /* last time changed by semctl() */ | |
| 49 | unsigned short int sem_nsems; /* number of semaphores in set */ | |
| 50 | }; | |
| 51 | ||
| 0324daa0 RM |
52 | /* Union used for argument for `semctl'. */ |
| 53 | union semun | |
| 54 | { | |
| 55 | int val; /* value for SETVAL */ | |
| 56 | struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ | |
| 57 | unsigned short int *array; /* array for GETALL & SETALL */ | |
| 58 | struct seminfo *__buf; /* buffer for IPC_INFO */ | |
| 59 | }; | |
| 6d52618b | 60 | |
| 60478656 | 61 | __END_DECLS |