1 /*- 2 * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org> 3 * All rights reserved. 4 * 5 * Copyright (c) 2008 Nokia Corporation 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/9/sys/sys/bitset.h 281538 2015-04-14 20:05:26Z jhb $ 30 */ 31 32 #ifndef _SYS_BITSET_H_ 33 #define _SYS_BITSET_H_ 34 35 #define BIT_CLR(_s, n, p) \ 36 ((p)->__bits[__bitset_word(_s, n)] &= ~__bitset_mask((_s), (n))) 37 38 #define BIT_COPY(_s, f, t) (void)(*(t) = *(f)) 39 40 #define BIT_ISSET(_s, n, p) \ 41 ((((p)->__bits[__bitset_word(_s, n)] & __bitset_mask((_s), (n))) != 0)) 42 43 #define BIT_SET(_s, n, p) \ 44 ((p)->__bits[__bitset_word(_s, n)] |= __bitset_mask((_s), (n))) 45 46 #define BIT_ZERO(_s, p) do { \ 47 __size_t __i; \ 48 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 49 (p)->__bits[__i] = 0L; \ 50 } while (0) 51 52 #define BIT_FILL(_s, p) do { \ 53 __size_t __i; \ 54 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 55 (p)->__bits[__i] = -1L; \ 56 } while (0) 57 58 #define BIT_SETOF(_s, n, p) do { \ 59 BIT_ZERO(_s, p); \ 60 (p)->__bits[__bitset_word(_s, n)] = __bitset_mask((_s), (n)); \ 61 } while (0) 62 63 /* Is p empty. */ 64 #define BIT_EMPTY(_s, p) __extension__ ({ \ 65 __size_t __i; \ 66 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 67 if ((p)->__bits[__i]) \ 68 break; \ 69 __i == __bitset_words((_s)); \ 70 }) 71 72 /* Is p full set. */ 73 #define BIT_ISFULLSET(_s, p) __extension__ ({ \ 74 __size_t __i; \ 75 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 76 if ((p)->__bits[__i] != (long)-1) \ 77 break; \ 78 __i == __bitset_words((_s)); \ 79 }) 80 81 /* Is c a subset of p. */ 82 #define BIT_SUBSET(_s, p, c) __extension__ ({ \ 83 __size_t __i; \ 84 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 85 if (((c)->__bits[__i] & \ 86 (p)->__bits[__i]) != \ 87 (c)->__bits[__i]) \ 88 break; \ 89 __i == __bitset_words((_s)); \ 90 }) 91 92 /* Are there any common bits between b & c? */ 93 #define BIT_OVERLAP(_s, p, c) __extension__ ({ \ 94 __size_t __i; \ 95 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 96 if (((c)->__bits[__i] & \ 97 (p)->__bits[__i]) != 0) \ 98 break; \ 99 __i != __bitset_words((_s)); \ 100 }) 101 102 /* Compare two sets, returns 0 if equal 1 otherwise. */ 103 #define BIT_CMP(_s, p, c) __extension__ ({ \ 104 __size_t __i; \ 105 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 106 if (((c)->__bits[__i] != \ 107 (p)->__bits[__i])) \ 108 break; \ 109 __i != __bitset_words((_s)); \ 110 }) 111 112 #define BIT_OR(_s, d, s) do { \ 113 __size_t __i; \ 114 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 115 (d)->__bits[__i] |= (s)->__bits[__i]; \ 116 } while (0) 117 118 #define BIT_AND(_s, d, s) do { \ 119 __size_t __i; \ 120 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 121 (d)->__bits[__i] &= (s)->__bits[__i]; \ 122 } while (0) 123 124 #define BIT_NAND(_s, d, s) do { \ 125 __size_t __i; \ 126 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 127 (d)->__bits[__i] &= ~(s)->__bits[__i]; \ 128 } while (0) 129 130 #define BIT_CLR_ATOMIC(_s, n, p) \ 131 atomic_clear_long(&(p)->__bits[__bitset_word(_s, n)], \ 132 __bitset_mask((_s), n)) 133 134 #define BIT_SET_ATOMIC(_s, n, p) \ 135 atomic_set_long(&(p)->__bits[__bitset_word(_s, n)], \ 136 __bitset_mask((_s), n)) 137 138 /* Convenience functions catering special cases. */ 139 #define BIT_OR_ATOMIC(_s, d, s) do { \ 140 __size_t __i; \ 141 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 142 atomic_set_long(&(d)->__bits[__i], \ 143 (s)->__bits[__i]); \ 144 } while (0) 145 146 #define BIT_COPY_STORE_REL(_s, f, t) do { \ 147 __size_t __i; \ 148 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 149 atomic_store_rel_long(&(t)->__bits[__i], \ 150 (f)->__bits[__i]); \ 151 } while (0) 152 153 #define BIT_FFS(_s, p) __extension__ ({ \ 154 __size_t __i; \ 155 int __bit; \ 156 \ 157 __bit = 0; \ 158 for (__i = 0; __i < __bitset_words((_s)); __i++) { \ 159 if ((p)->__bits[__i] != 0) { \ 160 __bit = ffsl((p)->__bits[__i]); \ 161 __bit += __i * _BITSET_BITS; \ 162 break; \ 163 } \ 164 } \ 165 __bit; \ 166 }) 167 168 #define BIT_COUNT(_s, p) __extension__ ({ \ 169 __size_t __i; \ 170 int __count; \ 171 \ 172 __count = 0; \ 173 for (__i = 0; __i < __bitset_words((_s)); __i++) \ 174 __count += __bitcountl((p)->__bits[__i]); \ 175 __count; \ 176 }) 177 178 #endif /* !_SYS_BITSET_H_ */ 179