1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 2003 Marcel Moolenaar.  All rights reserved.
  24  * Copyright 2014 PALO, Richard.
  25  */
  26 
  27 #ifndef _SYS_NULL_H
  28 #define _SYS_NULL_H
  29 
  30 #ifndef NULL
  31 
  32 #if !defined(__cplusplus)
  33 #define NULL    ((void *)0)
  34 #else
  35 #if __cplusplus >= 201103L
  36 #define NULL    nullptr
  37 #elif defined(__GNUG__) && defined(__GNUC__) && __GNUC__ >= 4
  38 #define NULL    __null
  39 #else
  40 #if defined(_LP64)
  41 #define NULL    (0L)
  42 #else
  43 #define NULL    0
  44 #endif  /* _LP64 */
  45 #endif  /* __GNUG__ */
  46 #endif  /* !__cplusplus */
  47 
  48 #endif
  49 
  50 #endif  /* _SYS_NULL_H */