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