| 1 | /** @file
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| 2 | * FreeBSD 5.2+
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| 3 | */
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| 4 | /*
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| 5 | * Copyright (c) 2003 Marcel Moolenaar
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | *
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | *
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| 29 | * $FreeBSD: src/sys/sys/_null.h,v 1.6 2004/03/05 08:10:19 markm Exp $
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| 30 | */
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| 31 |
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| 32 | #ifndef NULL
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| 33 |
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| 34 | #if defined(_KERNEL) || !defined(__cplusplus)
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| 35 | #define NULL ((void *)0)
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| 36 | #else
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| 37 | #if defined(__LP64__)
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| 38 | #define NULL (0L)
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| 39 | #else
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| 40 | #define NULL 0
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| 41 | #endif /* __LP64__ */
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| 42 | #endif /* _KERNEL || !__cplusplus */
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| 43 |
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| 44 | #endif
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