/*- * Copyright (c) 2008, Jeffrey Roberson * All rights reserved. * * Copyright (c) 2008 Nokia Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD: head/sys/sys/bitset.h 320893 2017-07-11 12:35:44Z kib $ */ #ifndef _SYS_BITSET_H_ #define _SYS_BITSET_H_ #include #include #define __bitset_mask(_s, n) \ (1L << ((__bitset_words((_s)) == 1) ? \ (__size_t)(n) : ((n) % _BITSET_BITS))) #define __bitset_word(_s, n) \ ((__bitset_words((_s)) == 1) ? 0 : ((n) / _BITSET_BITS)) #define BIT_CLR(_s, n, p) \ ((p)->__bits[__bitset_word(_s, n)] &= ~__bitset_mask((_s), (n))) #define BIT_COPY(_s, f, t) (void)(*(t) = *(f)) #define BIT_ISSET(_s, n, p) \ ((((p)->__bits[__bitset_word(_s, n)] & __bitset_mask((_s), (n))) != 0)) #define BIT_SET(_s, n, p) \ ((p)->__bits[__bitset_word(_s, n)] |= __bitset_mask((_s), (n))) #define BIT_ZERO(_s, p) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (p)->__bits[__i] = 0L; \ } while (0) #define BIT_FILL(_s, p) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (p)->__bits[__i] = -1L; \ } while (0) #define BIT_SETOF(_s, n, p) do { \ BIT_ZERO(_s, p); \ (p)->__bits[__bitset_word(_s, n)] = __bitset_mask((_s), (n)); \ } while (0) /* Is p empty. */ #define BIT_EMPTY(_s, p) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ if ((p)->__bits[__i]) \ break; \ __i == __bitset_words((_s)); \ }) /* Is p full set. */ #define BIT_ISFULLSET(_s, p) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ if ((p)->__bits[__i] != (long)-1) \ break; \ __i == __bitset_words((_s)); \ }) /* Is c a subset of p. */ #define BIT_SUBSET(_s, p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ if (((c)->__bits[__i] & \ (p)->__bits[__i]) != \ (c)->__bits[__i]) \ break; \ __i == __bitset_words((_s)); \ }) /* Are there any common bits between b & c? */ #define BIT_OVERLAP(_s, p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ if (((c)->__bits[__i] & \ (p)->__bits[__i]) != 0) \ break; \ __i != __bitset_words((_s)); \ }) /* Compare two sets, returns 0 if equal 1 otherwise. */ #define BIT_CMP(_s, p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ if (((c)->__bits[__i] != \ (p)->__bits[__i])) \ break; \ __i != __bitset_words((_s)); \ }) #define BIT_OR(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] |= (s)->__bits[__i]; \ } while (0) #define BIT_OR2(_s, d, s1, s2) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] = (s1)->__bits[__i] | (s2)->__bits[__i];\ } while (0) #define BIT_AND(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] &= (s)->__bits[__i]; \ } while (0) #define BIT_AND2(_s, d, s1, s2) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] = (s1)->__bits[__i] & (s2)->__bits[__i];\ } while (0) #define BIT_NAND(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] &= ~(s)->__bits[__i]; \ } while (0) #define BIT_NAND2(_s, d, s1, s2) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] = (s1)->__bits[__i] & ~(s2)->__bits[__i];\ } while (0) #define BIT_XOR(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] ^= (s)->__bits[__i]; \ } while (0) #define BIT_XOR2(_s, d, s1, s2) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ (d)->__bits[__i] = (s1)->__bits[__i] ^ (s2)->__bits[__i];\ } while (0) #define BIT_CLR_ATOMIC(_s, n, p) \ atomic_clear_long(&(p)->__bits[__bitset_word(_s, n)], \ __bitset_mask((_s), n)) #define BIT_SET_ATOMIC(_s, n, p) \ atomic_set_long(&(p)->__bits[__bitset_word(_s, n)], \ __bitset_mask((_s), n)) #define BIT_SET_ATOMIC_ACQ(_s, n, p) \ atomic_set_acq_long(&(p)->__bits[__bitset_word(_s, n)], \ __bitset_mask((_s), n)) /* Convenience functions catering special cases. */ #define BIT_AND_ATOMIC(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ atomic_clear_long(&(d)->__bits[__i], \ ~(s)->__bits[__i]); \ } while (0) #define BIT_OR_ATOMIC(_s, d, s) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ atomic_set_long(&(d)->__bits[__i], \ (s)->__bits[__i]); \ } while (0) #define BIT_COPY_STORE_REL(_s, f, t) do { \ __size_t __i; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ atomic_store_rel_long(&(t)->__bits[__i], \ (f)->__bits[__i]); \ } while (0) #define BIT_FFS(_s, p) __extension__ ({ \ __size_t __i; \ int __bit; \ \ __bit = 0; \ for (__i = 0; __i < __bitset_words((_s)); __i++) { \ if ((p)->__bits[__i] != 0) { \ __bit = ffsl((p)->__bits[__i]); \ __bit += __i * _BITSET_BITS; \ break; \ } \ } \ __bit; \ }) #define BIT_FLS(_s, p) __extension__ ({ \ __size_t __i; \ int __bit; \ \ __bit = 0; \ for (__i = __bitset_words((_s)); __i > 0; __i--) { \ if ((p)->__bits[__i - 1] != 0) { \ __bit = flsl((p)->__bits[__i - 1]); \ __bit += (__i - 1) * _BITSET_BITS; \ break; \ } \ } \ __bit; \ }) #define BIT_COUNT(_s, p) __extension__ ({ \ __size_t __i; \ int __count; \ \ __count = 0; \ for (__i = 0; __i < __bitset_words((_s)); __i++) \ __count += __bitcountl((p)->__bits[__i]); \ __count; \ }) #define BITSET_T_INITIALIZER(x) \ { .__bits = { x } } #define BITSET_FSET(n) \ [ 0 ... ((n) - 1) ] = (-1L) /* * Dynamically allocate a bitset. */ #define BITSET_ALLOC(_s, mt, mf) \ malloc(__bitset_words(_s) * sizeof(long), mt, (mf)) #endif /* !_SYS_BITSET_H_ */