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Annotation of XNU/osfmk/kern/macro_help.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /*
                     23:  * @OSF_COPYRIGHT@
                     24:  */
                     25: /*
                     26:  * HISTORY
                     27:  * 
                     28:  * Revision 1.1.1.1  1998/09/22 21:05:34  wsanchez
                     29:  * Import of Mac OS X kernel (~semeria)
                     30:  *
                     31:  * Revision 1.1.1.1  1998/03/07 02:25:55  wsanchez
                     32:  * Import of OSF Mach kernel (~mburg)
                     33:  *
                     34:  * Revision 1.1.6.1  1994/09/23  02:23:07  ezf
                     35:  *     change marker to not FREE
                     36:  *     [1994/09/22  21:34:48  ezf]
                     37:  *
                     38:  * Revision 1.1.2.3  1993/06/07  22:14:06  jeffc
                     39:  *     CR9176 - ANSI C violations: trailing tokens on CPP
                     40:  *     directives, extra semicolons after decl_ ..., asm keywords
                     41:  *     [1993/06/07  19:06:13  jeffc]
                     42:  * 
                     43:  * Revision 1.1.2.2  1993/06/02  23:39:03  jeffc
                     44:  *     Added to OSF/1 R1.3 from NMK15.0.
                     45:  *     [1993/06/02  21:13:38  jeffc]
                     46:  * 
                     47:  * Revision 1.1  1992/09/30  02:29:53  robert
                     48:  *     Initial revision
                     49:  * 
                     50:  * $EndLog$
                     51:  */
                     52: /* CMU_HIST */
                     53: /*
                     54:  * Revision 2.3  91/05/14  16:44:49  mrt
                     55:  *     Correcting copyright
                     56:  * 
                     57:  * Revision 2.2  91/02/05  17:28:09  mrt
                     58:  *     Changed to new Mach copyright
                     59:  *     [91/02/01  16:15:31  mrt]
                     60:  * 
                     61:  * Revision 2.1  89/08/03  15:53:45  rwd
                     62:  * Created.
                     63:  * 
                     64:  * Revision 2.2  88/10/18  03:36:20  mwyoung
                     65:  *     Added a form of return that can be used within macros that
                     66:  *     does not result in "statement not reached" noise.
                     67:  *     [88/10/17            mwyoung]
                     68:  *     
                     69:  *     Add MACRO_BEGIN, MACRO_END.
                     70:  *     [88/10/11            mwyoung]
                     71:  *     
                     72:  *     Created.
                     73:  *     [88/10/08            mwyoung]
                     74:  * 
                     75:  */
                     76: /* CMU_ENDHIST */
                     77: /* 
                     78:  * Mach Operating System
                     79:  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
                     80:  * All Rights Reserved.
                     81:  * 
                     82:  * Permission to use, copy, modify and distribute this software and its
                     83:  * documentation is hereby granted, provided that both the copyright
                     84:  * notice and this permission notice appear in all copies of the
                     85:  * software, derivative works or modified versions, and any portions
                     86:  * thereof, and that both notices appear in supporting documentation.
                     87:  * 
                     88:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     89:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     90:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     91:  * 
                     92:  * Carnegie Mellon requests users of this software to return to
                     93:  * 
                     94:  *  Software Distribution Coordinator  or  [email protected]
                     95:  *  School of Computer Science
                     96:  *  Carnegie Mellon University
                     97:  *  Pittsburgh PA 15213-3890
                     98:  * 
                     99:  * any improvements or extensions that they make and grant Carnegie Mellon
                    100:  * the rights to redistribute these changes.
                    101:  */
                    102: /*
                    103:  */
                    104: /*
                    105:  *     File:   kern/macro_help.h
                    106:  *
                    107:  *     Provide help in making lint-free macro routines
                    108:  *
                    109:  */  
                    110: 
                    111: #ifndef        _KERN_MACRO_HELP_H_
                    112: #define        _KERN_MACRO_HELP_H_
                    113: 
                    114: #include <mach/boolean.h>
                    115: 
                    116: #ifdef lint
                    117: boolean_t      NEVER;
                    118: boolean_t      ALWAYS;
                    119: #else  /* lint */
                    120: #define                NEVER           FALSE
                    121: #define                ALWAYS          TRUE
                    122: #endif /* lint */
                    123: 
                    124: #define                MACRO_BEGIN     do {
                    125: #define                MACRO_END       } while (NEVER)
                    126: 
                    127: #define                MACRO_RETURN    if (ALWAYS) return
                    128: 
                    129: #endif /* _KERN_MACRO_HELP_H_ */

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