79cf319bae
The existing version depends on register_t and uintptr_t, which are only available when including headers such as <sys/types.h>. As this macro is used by <sys/socket.h>, for example, it should be written in such a way that it doesn't depend on those types.
53 lines
2.4 KiB
C
53 lines
2.4 KiB
C
/*-
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* Copyright (c) 2001 David E. O'Brien
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $FreeBSD$
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*/
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#ifndef _X86_INCLUDE__ALIGN_H_
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#define _X86_INCLUDE__ALIGN_H_
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value
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* for all data types (int, long, ...). The result is unsigned int
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* and must be cast to any desired pointer type.
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*/
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#define _ALIGNBYTES (sizeof(__register_t) - 1)
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#define _ALIGN(p) (((__uintptr_t)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
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#endif /* !_X86_INCLUDE__ALIGN_H_ */
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