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Diffstat (limited to 'sysdeps/unix/sysv/linux/bits/sem.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/bits/sem.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/sem.h b/sysdeps/unix/sysv/linux/bits/sem.h new file mode 100644 index 0000000000..049a71bc47 --- /dev/null +++ b/sysdeps/unix/sysv/linux/bits/sem.h @@ -0,0 +1,88 @@ +/* Copyright (C) 1995, 1996 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _SYS_SEM_BUF_H + +#define _SYS_SEM_BUF_H 1 +#include <features.h> + +#include <sys/types.h> + +/* Flags for `semop'. */ +#define SEM_UNDO 0x1000 /* undo the operation on exit */ + +/* Commands for `semctl'. */ +#define GETPID 11 /* get sempid */ +#define GETVAL 12 /* get semval */ +#define GETALL 13 /* get all semval's */ +#define GETNCNT 14 /* get semncnt */ +#define GETZCNT 15 /* get semzcnt */ +#define SETVAL 16 /* set semval */ +#define SETALL 17 /* set all semval's */ + + +__BEGIN_DECLS + +/* Data structure describing a set of semaphores. */ +struct semid_ds +{ + struct ipc_perm sem_perm; /* operation permission struct */ + __time_t sem_otime; /* last semop() time */ + __time_t sem_ctime; /* last time changed by semctl() */ + struct sem *__sembase; /* ptr to first semaphore in array */ + struct sem_queue *__sem_pending; /* pending operations */ + struct sem_queue *__sem_pending_last; /* last pending operation */ + struct sem_undo *__undo; /* ondo requests on this array */ + unsigned short int sem_nsems; /* number of semaphores in set */ +}; + +/* Union used for argument for `semctl'. */ +union semun +{ + int val; /* value for SETVAL */ + struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ + unsigned short int *array; /* array for GETALL & SETALL */ + struct seminfo *__buf; /* buffer for IPC_INFO */ +}; + +#ifdef __USE_MISC + +/* ipcs ctl cmds */ +#define SEM_STAT 18 +#define SEM_INFO 19 + +struct seminfo +{ + int semmap; + int semmni; + int semmns; + int semmnu; + int semmsl; + int semopm; + int semume; + int semusz; + int semvmx; + int semaem; +}; + +#endif /* __USE_MISC */ + +__END_DECLS + +#endif /* _SYS_SEM_BUF_H */ |