mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SYS_SEM_H
|
|
# error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
|
|
#endif
|
|
|
|
#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 */
|
|
|
|
|
|
/* 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 */
|
|
__syscall_ulong_t __glibc_reserved1;
|
|
__time_t sem_ctime; /* last time changed by semctl() */
|
|
__syscall_ulong_t __glibc_reserved2;
|
|
__syscall_ulong_t sem_nsems; /* number of semaphores in set */
|
|
__syscall_ulong_t __glibc_reserved3;
|
|
__syscall_ulong_t __glibc_reserved4;
|
|
};
|
|
|
|
/* The user should define a union like the following to use it for arguments
|
|
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
|
|
};
|
|
|
|
Previous versions of this file used to define this union but this is
|
|
incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
|
|
one must define the union or not. */
|
|
#define _SEM_SEMUN_UNDEFINED 1
|
|
|
|
#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 */
|