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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1986 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#ifndef _sys_sem_h
#define _sys_sem_h
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* IPC Semaphore Facility.
*/
/*
* Semaphore Operation Flags.
*/
#define SEM_UNDO 010000 /* set up adjust on exit entry */
/*
* Semctl Command Definitions.
*/
#define GETNCNT 3 /* get semncnt */
#define GETPID 4 /* get sempid */
#define GETVAL 5 /* get semval */
#define GETALL 6 /* get all semval's */
#define GETZCNT 7 /* get semzcnt */
#define SETVAL 8 /* set semval */
#define SETALL 9 /* set all semval's */
/*
* Structure Definitions.
*/
/*
* There is one semaphore id data structure for each set of semaphores
* in the system.
*/
struct semid_ds {
struct ipc_perm sem_perm; /* operation permission struct */
struct sem *sem_base; /* ptr to first semaphore in set */
ushort sem_nsems; /* # of semaphores in set */
time_t sem_otime; /* last semop time */
time_t sem_ctime; /* last change time */
};
/*
* There is one semaphore structure for each semaphore in the system.
*/
struct sem {
ushort semval; /* semaphore text map address */
short sempid; /* pid of last operation */
ushort semncnt; /* # awaiting semval > cval */
ushort semzcnt; /* # awaiting semval = 0 */
};
/*
* User semaphore template for semop system calls.
*/
struct sembuf {
short sem_num; /* semaphore # */
short sem_op; /* semaphore operation */
short sem_flg; /* operation flags */
};
/*
* 'arg' argument template for semctl system calls.
*/
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
ushort *array; /* array for GETALL & SETALL */
};
#endif /* !_sys_sem_h */
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