/* Copyright (C) 2002-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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#ifndef _SYS_SEM_H

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# error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."

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#endif

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#include <sys/types.h>

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/* Flags for `semop'. */

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#define SEM_UNDO 0x1000 /* undo the operation on exit */

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/* Commands for `semctl'. */

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#define GETPID 11 /* get sempid */

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#define GETVAL 12 /* get semval */

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#define GETALL 13 /* get all semval's */

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#define GETNCNT 14 /* get semncnt */

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#define GETZCNT 15 /* get semzcnt */

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#define SETVAL 16 /* set semval */

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#define SETALL 17 /* set all semval's */

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/* Data structure describing a set of semaphores. */

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struct semid_ds

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{

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struct ipc_perm sem_perm; /* operation permission struct */

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__time_t sem_otime; /* last semop() time */

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__syscall_ulong_t __glibc_reserved1;

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__time_t sem_ctime; /* last time changed by semctl() */

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__syscall_ulong_t __glibc_reserved2;

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__syscall_ulong_t sem_nsems; /* number of semaphores in set */

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__syscall_ulong_t __glibc_reserved3;

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__syscall_ulong_t __glibc_reserved4;

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};

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/* The user should define a union like the following to use it for arguments

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for `semctl'.

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union semun

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{

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int val; <= value for SETVAL

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struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET

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unsigned short int *array; <= array for GETALL & SETALL

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struct seminfo *__buf; <= buffer for IPC_INFO

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};

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Previous versions of this file used to define this union but this is

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incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether

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one must define the union or not. */

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#define _SEM_SEMUN_UNDEFINED 1

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#ifdef __USE_MISC

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/* ipcs ctl cmds */

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# define SEM_STAT 18

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# define SEM_INFO 19

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# define SEM_STAT_ANY 20

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struct seminfo

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{

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int semmap;

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int semmni;

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int semmns;

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int semmnu;

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int semmsl;

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int semopm;

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int semume;

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int semusz;

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int semvmx;

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int semaem;

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};

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#endif /* __USE_MISC */

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