1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #ifndef _SYS_BITMAP_H 32 #define _SYS_BITMAP_H 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * Operations on bitmaps of arbitrary size 40 * A bitmap is a vector of 1 or more ulong_t's. 41 * The user of the package is responsible for range checks and keeping 42 * track of sizes. 43 */ 44 45 #ifdef _LP64 46 #define BT_ULSHIFT 6 /* log base 2 of BT_NBIPUL, to extract word index */ 47 #define BT_ULSHIFT32 5 /* log base 2 of BT_NBIPUL, to extract word index */ 48 #else 49 #define BT_ULSHIFT 5 /* log base 2 of BT_NBIPUL, to extract word index */ 50 #endif 51 52 #define BT_NBIPUL (1 << BT_ULSHIFT) /* n bits per ulong_t */ 53 #define BT_ULMASK (BT_NBIPUL - 1) /* to extract bit index */ 54 55 /* 56 * bitmap is a ulong_t *, bitindex an index_t 57 * 58 * The macros BT_WIM and BT_BIW internal; there is no need 59 * for users of this package to use them. 60 */ 61 62 /* 63 * word in map 64 */ 65 #define BT_WIM(bitmap, bitindex) \ 66 ((bitmap)[(bitindex) >> BT_ULSHIFT]) 67 /* 68 * bit in word 69 */ 70 #define BT_BIW(bitindex) \ 71 (1UL << ((bitindex) & BT_ULMASK)) 72 73 /* 74 * These are public macros 75 * 76 * BT_BITOUL == n bits to n ulong_t's 77 */ 78 #define BT_BITOUL(nbits) \ 79 (((nbits) + BT_NBIPUL - 1l) / BT_NBIPUL) 80 #define BT_SIZEOFMAP(nbits) \ 81 (BT_BITOUL(nbits) * sizeof (ulong_t)) 82 #define BT_TEST(bitmap, bitindex) \ 83 ((BT_WIM((bitmap), (bitindex)) & BT_BIW(bitindex)) ? 1 : 0) 84 #define BT_SET(bitmap, bitindex) \ 85 { BT_WIM((bitmap), (bitindex)) |= BT_BIW(bitindex); } 86 #define BT_CLEAR(bitmap, bitindex) \ 87 { BT_WIM((bitmap), (bitindex)) &= ~BT_BIW(bitindex); } 88 89 #ifdef __cplusplus 90 } 91 #endif 92 93 #endif /* _SYS_BITMAP_H */ 94