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7536331217
redefine such operations for different consumers. This will be used when NUMA support will be finished and numaset will need to be used. Sponsored by: EMC / Isilon storage division Obtained from: jeff Reviewed by: alc
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/*-
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* Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
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* All rights reserved.
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*
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* Copyright (c) 2008 Nokia Corporation
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* All rights reserved.
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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 unmodified, this list of conditions, and the following
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS__BITSET_H_
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#define _SYS__BITSET_H_
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/*
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* Macros addressing word and bit within it, tuned to make compiler
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* optimize cases when SETSIZE fits into single machine word.
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*/
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#define _BITSET_BITS (sizeof(long) * NBBY)
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#define __bitset_words(_s) (howmany(_s, _BITSET_BITS))
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#define __bitset_mask(_s, n) \
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(1L << ((__bitset_words((_s)) == 1) ? \
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(__size_t)(n) : ((n) % _BITSET_BITS)))
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#define __bitset_word(_s, n) \
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((__bitset_words((_s)) == 1) ? 0 : ((n) / _BITSET_BITS))
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#define BITSET_DEFINE(t, _s) \
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struct t { \
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long __bits[__bitset_words((_s))]; \
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};
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#define BITSET_T_INITIALIZER(x) \
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{ .__bits = { x } }
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#define BITSET_FSET(n) \
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[ 0 ... ((n) - 1) ] = (-1L)
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#endif /* !_SYS__BITSET_H_ */
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