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 35extern "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