xref: /onnv-gate/usr/src/lib/libbc/inc/include/sys/sem.h (revision 722:636b850d4ee9)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
50Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
60Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
70Sstevel@tonic-gate  * with the License.
80Sstevel@tonic-gate  *
90Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
100Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
110Sstevel@tonic-gate  * See the License for the specific language governing permissions
120Sstevel@tonic-gate  * and limitations under the License.
130Sstevel@tonic-gate  *
140Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
150Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
160Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
170Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
180Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
190Sstevel@tonic-gate  *
200Sstevel@tonic-gate  * CDDL HEADER END
210Sstevel@tonic-gate  */
220Sstevel@tonic-gate /*
230Sstevel@tonic-gate  * Copyright 1986 Sun Microsystems, Inc.  All rights reserved.
240Sstevel@tonic-gate  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
270Sstevel@tonic-gate /*      Copyright (c) 1984 AT&T */
280Sstevel@tonic-gate /*        All Rights Reserved   */
290Sstevel@tonic-gate 
30*722Smuffin #ifndef _sys_sem_h
31*722Smuffin #define	_sys_sem_h
32*722Smuffin 
330Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
340Sstevel@tonic-gate 
350Sstevel@tonic-gate /*
360Sstevel@tonic-gate  *	IPC Semaphore Facility.
370Sstevel@tonic-gate  */
380Sstevel@tonic-gate 
390Sstevel@tonic-gate /*
400Sstevel@tonic-gate  *	Semaphore Operation Flags.
410Sstevel@tonic-gate  */
420Sstevel@tonic-gate #define	SEM_UNDO	010000	/* set up adjust on exit entry */
430Sstevel@tonic-gate 
440Sstevel@tonic-gate /*
450Sstevel@tonic-gate  *	Semctl Command Definitions.
460Sstevel@tonic-gate  */
470Sstevel@tonic-gate 
480Sstevel@tonic-gate #define	GETNCNT	3	/* get semncnt */
490Sstevel@tonic-gate #define	GETPID	4	/* get sempid */
500Sstevel@tonic-gate #define	GETVAL	5	/* get semval */
510Sstevel@tonic-gate #define	GETALL	6	/* get all semval's */
520Sstevel@tonic-gate #define	GETZCNT	7	/* get semzcnt */
530Sstevel@tonic-gate #define	SETVAL	8	/* set semval */
540Sstevel@tonic-gate #define	SETALL	9	/* set all semval's */
550Sstevel@tonic-gate 
560Sstevel@tonic-gate /*
570Sstevel@tonic-gate  *	Structure Definitions.
580Sstevel@tonic-gate  */
590Sstevel@tonic-gate 
600Sstevel@tonic-gate /*
610Sstevel@tonic-gate  *	There is one semaphore id data structure for each set of semaphores
620Sstevel@tonic-gate  *		in the system.
630Sstevel@tonic-gate  */
640Sstevel@tonic-gate 
650Sstevel@tonic-gate struct semid_ds {
660Sstevel@tonic-gate 	struct ipc_perm	sem_perm;	/* operation permission struct */
670Sstevel@tonic-gate 	struct sem	*sem_base;	/* ptr to first semaphore in set */
680Sstevel@tonic-gate 	ushort		sem_nsems;	/* # of semaphores in set */
690Sstevel@tonic-gate 	time_t		sem_otime;	/* last semop time */
700Sstevel@tonic-gate 	time_t		sem_ctime;	/* last change time */
710Sstevel@tonic-gate };
720Sstevel@tonic-gate 
730Sstevel@tonic-gate /*
740Sstevel@tonic-gate  *	There is one semaphore structure for each semaphore in the system.
750Sstevel@tonic-gate  */
760Sstevel@tonic-gate 
770Sstevel@tonic-gate struct sem {
780Sstevel@tonic-gate 	ushort	semval;		/* semaphore text map address */
790Sstevel@tonic-gate 	short	sempid;		/* pid of last operation */
800Sstevel@tonic-gate 	ushort	semncnt;	/* # awaiting semval > cval */
810Sstevel@tonic-gate 	ushort	semzcnt;	/* # awaiting semval = 0 */
820Sstevel@tonic-gate };
830Sstevel@tonic-gate 
840Sstevel@tonic-gate /*
850Sstevel@tonic-gate  *	User semaphore template for semop system calls.
860Sstevel@tonic-gate  */
870Sstevel@tonic-gate 
880Sstevel@tonic-gate struct sembuf {
890Sstevel@tonic-gate 	short	sem_num;	/* semaphore # */
900Sstevel@tonic-gate 	short	sem_op;		/* semaphore operation */
910Sstevel@tonic-gate 	short	sem_flg;	/* operation flags */
920Sstevel@tonic-gate };
930Sstevel@tonic-gate 
940Sstevel@tonic-gate /*
950Sstevel@tonic-gate  *	'arg' argument template for semctl system calls.
960Sstevel@tonic-gate  */
970Sstevel@tonic-gate union semun {
980Sstevel@tonic-gate 	int		val;	/* value for SETVAL */
990Sstevel@tonic-gate 	struct semid_ds	*buf;	/* buffer for IPC_STAT & IPC_SET */
1000Sstevel@tonic-gate 	ushort		*array;	/* array for GETALL & SETALL */
1010Sstevel@tonic-gate };
1020Sstevel@tonic-gate 
103*722Smuffin #endif /* !_sys_sem_h */
104