| 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, write to the Free |
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| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 17 | 02111-1307 USA. */ |
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| 18 | |
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| 19 | #ifndef _SYS_SEM_H |
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| 20 | # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead." |
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| 21 | #endif |
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| 22 | |
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| 23 | #include <sys/types.h> |
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| 24 | |
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| 25 | /* Flags for `semop'. */ |
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| 26 | #define SEM_UNDO 0x1000 /* undo the operation on exit */ |
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| 27 | |
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| 28 | /* Commands for `semctl'. */ |
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| 29 | #define GETPID 11 /* get sempid */ |
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| 30 | #define GETVAL 12 /* get semval */ |
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| 31 | #define GETALL 13 /* get all semval's */ |
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| 32 | #define GETNCNT 14 /* get semncnt */ |
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| 33 | #define GETZCNT 15 /* get semzcnt */ |
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| 34 | #define SETVAL 16 /* set semval */ |
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| 35 | #define SETALL 17 /* set all semval's */ |
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| 36 | |
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| 37 | |
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| 38 | /* Data structure describing a set of semaphores. */ |
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| 39 | struct semid_ds |
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| 40 | { |
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| 41 | struct ipc_perm sem_perm; /* operation permission struct */ |
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| 42 | __time_t sem_otime; /* last semop() time */ |
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| 43 | __time_t sem_ctime; /* last time changed by semctl() */ |
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| 44 | unsigned long int sem_nsems; /* number of semaphores in set */ |
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| 45 | unsigned long int __unused1; |
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| 46 | unsigned long int __unused2; |
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| 47 | }; |
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| 48 | |
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| 49 | /* The user should define a union like the following to use it for arguments |
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| 50 | for `semctl'. |
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| 51 | |
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| 52 | union semun |
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| 53 | { |
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| 54 | int val; <= value for SETVAL |
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| 55 | struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET |
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| 56 | unsigned short int *array; <= array for GETALL & SETALL |
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| 57 | struct seminfo *__buf; <= buffer for IPC_INFO |
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| 58 | }; |
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| 59 | |
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| 60 | Previous versions of this file used to define this union but this is |
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| 61 | incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether |
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| 62 | one must define the union or not. */ |
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| 63 | #define _SEM_SEMUN_UNDEFINED 1 |
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| 64 | |
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| 65 | #ifdef __USE_MISC |
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| 66 | |
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| 67 | /* ipcs ctl cmds */ |
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| 68 | # define SEM_STAT 18 |
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| 69 | # define SEM_INFO 19 |
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| 70 | |
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| 71 | struct seminfo |
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| 72 | { |
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| 73 | int semmap; |
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| 74 | int semmni; |
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| 75 | int semmns; |
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| 76 | int semmnu; |
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| 77 | int semmsl; |
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| 78 | int semopm; |
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| 79 | int semume; |
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| 80 | int semusz; |
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| 81 | int semvmx; |
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| 82 | int semaem; |
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| 83 | }; |
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| 84 | |
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| 85 | #endif /* __USE_MISC */ |
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