48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* Copyright (C) 2004 The KOS Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#ifndef _SOS_MACROS_H_
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#define _SOS_MACROS_H_
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/** Align on a boundary (MUST be a power of 2), so that return value <= val */
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#define SOS_ALIGN_INF(val,boundary) \
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(((unsigned)(val)) & (~((boundary)-1)))
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/** Align on a boundary (MUST be a power of 2), so that return value >= val */
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#define SOS_ALIGN_SUP(val,boundary) \
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({ unsigned int __bnd=(boundary); \
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(((((unsigned)(val))-1) & (~(__bnd - 1))) + __bnd); })
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/** Check whether val is aligned on a boundary (MUST be a power of 2) */
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#define SOS_IS_ALIGNED(val,boundary) \
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( 0 == (((unsigned)(val)) & ((boundary)-1)) )
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/**
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* @return TRUE if val is a power of 2.
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* @note val is evaluated multiple times
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*/
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#define SOS_IS_POWER_OF_2(val) \
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((((val) - 1) & (val)) == 0)
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/**
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* Standard macro to get the offset of the given field in a structure
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*/
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#define offsetof(type,field) \
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((unsigned) &(((type *)0)->field))
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#endif /* _SOS_MACROS_H_ */
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