Source to osfmk/kern/macro_help.h


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/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @[email protected]
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @[email protected]
 */
/*
 * @[email protected]
 */
/*
 * HISTORY
 * 
 * Revision 1.1.1.1  1998/09/22 21:05:34  wsanchez
 * Import of Mac OS X kernel (~semeria)
 *
 * Revision 1.1.1.1  1998/03/07 02:25:55  wsanchez
 * Import of OSF Mach kernel (~mburg)
 *
 * Revision 1.1.6.1  1994/09/23  02:23:07  ezf
 * 	change marker to not FREE
 * 	[1994/09/22  21:34:48  ezf]
 *
 * Revision 1.1.2.3  1993/06/07  22:14:06  jeffc
 * 	CR9176 - ANSI C violations: trailing tokens on CPP
 * 	directives, extra semicolons after decl_ ..., asm keywords
 * 	[1993/06/07  19:06:13  jeffc]
 * 
 * Revision 1.1.2.2  1993/06/02  23:39:03  jeffc
 * 	Added to OSF/1 R1.3 from NMK15.0.
 * 	[1993/06/02  21:13:38  jeffc]
 * 
 * Revision 1.1  1992/09/30  02:29:53  robert
 * 	Initial revision
 * 
 * $EndLog$
 */
/* CMU_HIST */
/*
 * Revision 2.3  91/05/14  16:44:49  mrt
 * 	Correcting copyright
 * 
 * Revision 2.2  91/02/05  17:28:09  mrt
 * 	Changed to new Mach copyright
 * 	[91/02/01  16:15:31  mrt]
 * 
 * Revision 2.1  89/08/03  15:53:45  rwd
 * Created.
 * 
 * Revision 2.2  88/10/18  03:36:20  mwyoung
 * 	Added a form of return that can be used within macros that
 * 	does not result in "statement not reached" noise.
 * 	[88/10/17            mwyoung]
 * 	
 * 	Add MACRO_BEGIN, MACRO_END.
 * 	[88/10/11            mwyoung]
 * 	
 * 	Created.
 * 	[88/10/08            mwyoung]
 * 
 */
/* CMU_ENDHIST */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  [email protected]
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	File:	kern/macro_help.h
 *
 *	Provide help in making lint-free macro routines
 *
 */  

#ifndef	_KERN_MACRO_HELP_H_
#define	_KERN_MACRO_HELP_H_

#include <mach/boolean.h>

#ifdef	lint
boolean_t	NEVER;
boolean_t	ALWAYS;
#else	/* lint */
#define		NEVER		FALSE
#define		ALWAYS		TRUE
#endif	/* lint */

#define		MACRO_BEGIN	do {
#define		MACRO_END	} while (NEVER)

#define		MACRO_RETURN	if (ALWAYS) return

#endif	/* _KERN_MACRO_HELP_H_ */