projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2000-2015 Free Software Foundation, Inc. |
| d5efd131 MF |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 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 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 75efb018 MF |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| d5efd131 MF |
18 | |
| 19 | #ifndef _SYS_SEM_H | |
| 20 | # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead." | |
| 21 | #endif | |
| 22 | ||
| 23 | #include <sys/types.h> | |
| 24 | ||
| 25 | /* Flags for `semop'. */ | |
| 26 | #define SEM_UNDO 0x1000 /* undo the operation on exit */ | |
| 27 | ||
| 28 | /* Commands for `semctl'. */ | |
| 29 | #define GETPID 11 /* get sempid */ | |
| 30 | #define GETVAL 12 /* get semval */ | |
| 31 | #define GETALL 13 /* get all semval's */ | |
| 32 | #define GETNCNT 14 /* get semncnt */ | |
| 33 | #define GETZCNT 15 /* get semzcnt */ | |
| 34 | #define SETVAL 16 /* set semval */ | |
| 35 | #define SETALL 17 /* set all semval's */ | |
| 36 | ||
| 37 | ||
| 38 | /* Data structure describing a set of semaphores. */ | |
| 39 | struct semid_ds | |
| 40 | { | |
| 41 | struct ipc_perm sem_perm; /* operation permission struct */ | |
| 42 | __time_t sem_otime; /* last semop() time */ | |
| 43 | __time_t sem_ctime; /* last time changed by semctl() */ | |
| 44 | unsigned long int sem_nsems; /* number of semaphores in set */ | |
| d1d9eaf4 OB |
45 | unsigned long int __glibc_reserved1; |
| 46 | unsigned long int __glibc_reserved2; | |
| d5efd131 MF |
47 | }; |
| 48 | ||
| 49 | /* The user should define a union like the following to use it for arguments | |
| 50 | for `semctl'. | |
| 51 | ||
| 52 | union semun | |
| 53 | { | |
| 54 | int val; <= value for SETVAL | |
| 55 | struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET | |
| 56 | unsigned short int *array; <= array for GETALL & SETALL | |
| 57 | struct seminfo *__buf; <= buffer for IPC_INFO | |
| 58 | }; | |
| 59 | ||
| 60 | Previous versions of this file used to define this union but this is | |
| 61 | incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether | |
| 62 | one must define the union or not. */ | |
| 63 | #define _SEM_SEMUN_UNDEFINED 1 | |
| 64 | ||
| 65 | #ifdef __USE_MISC | |
| 66 | ||
| 67 | /* ipcs ctl cmds */ | |
| 68 | # define SEM_STAT 18 | |
| 69 | # define SEM_INFO 19 | |
| 70 | ||
| 71 | struct seminfo | |
| 72 | { | |
| 73 | int semmap; | |
| 74 | int semmni; | |
| 75 | int semmns; | |
| 76 | int semmnu; | |
| 77 | int semmsl; | |
| 78 | int semopm; | |
| 79 | int semume; | |
| 80 | int semusz; | |
| 81 | int semvmx; | |
| 82 | int semaem; | |
| 83 | }; | |
| 84 | ||
| 85 | #endif /* __USE_MISC */ |