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 http://www.opensolaris.org/os/licensing. 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 2005 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 _COMPAT_OPENSOLARIS_SYS_BITMAP_H 32#define _COMPAT_OPENSOLARIS_SYS_BITMAP_H 33 34#include <sys/atomic.h> 35 36/* 37 * Operations on bitmaps of arbitrary size 38 * A bitmap is a vector of 1 or more ulong_t's. 39 * The user of the package is responsible for range checks and keeping 40 * track of sizes. 41 */ 42 43#ifdef _LP64 44#define BT_ULSHIFT 6 /* log base 2 of BT_NBIPUL, to extract word index */ 45#define BT_ULSHIFT32 5 /* log base 2 of BT_NBIPUL, to extract word index */ 46#else 47#define BT_ULSHIFT 5 /* log base 2 of BT_NBIPUL, to extract word index */ 48#endif 49 50#define BT_NBIPUL (1 << BT_ULSHIFT) /* n bits per ulong_t */ 51#define BT_ULMASK (BT_NBIPUL - 1) /* to extract bit index */ 52 53#ifdef _LP64 54#define BT_NBIPUL32 (1 << BT_ULSHIFT32) /* n bits per ulong_t */ 55#define BT_ULMASK32 (BT_NBIPUL32 - 1) /* to extract bit index */ 56#define BT_ULMAXMASK 0xffffffffffffffff /* used by bt_getlowbit */ 57#else 58#define BT_ULMAXMASK 0xffffffff 59#endif 60 61/* 62 * bitmap is a ulong_t *, bitindex an index_t 63 * 64 * The macros BT_WIM and BT_BIW internal; there is no need 65 * for users of this package to use them. 66 */ 67 68/* 69 * word in map 70 */ 71#define BT_WIM(bitmap, bitindex) \ 72 ((bitmap)[(bitindex) >> BT_ULSHIFT]) 73/* 74 * bit in word 75 */ 76#define BT_BIW(bitindex) \ 77 (1UL << ((bitindex) & BT_ULMASK)) 78 79#ifdef _LP64 80#define BT_WIM32(bitmap, bitindex) \ 81 ((bitmap)[(bitindex) >> BT_ULSHIFT32]) 82 83#define BT_BIW32(bitindex) \ 84 (1UL << ((bitindex) & BT_ULMASK32)) 85#endif 86 87/* 88 * These are public macros 89 * 90 * BT_BITOUL == n bits to n ulong_t's 91 */ 92#define BT_BITOUL(nbits) \ 93 (((nbits) + BT_NBIPUL - 1l) / BT_NBIPUL) 94#define BT_SIZEOFMAP(nbits) \ 95 (BT_BITOUL(nbits) * sizeof (ulong_t)) 96#define BT_TEST(bitmap, bitindex) \ 97 ((BT_WIM((bitmap), (bitindex)) & BT_BIW(bitindex)) ? 1 : 0) 98#define BT_SET(bitmap, bitindex) \ 99 { BT_WIM((bitmap), (bitindex)) |= BT_BIW(bitindex); } 100#define BT_CLEAR(bitmap, bitindex) \ 101 { BT_WIM((bitmap), (bitindex)) &= ~BT_BIW(bitindex); } 102 103#ifdef _LP64 104#define BT_BITOUL32(nbits) \ 105 (((nbits) + BT_NBIPUL32 - 1l) / BT_NBIPUL32) 106#define BT_SIZEOFMAP32(nbits) \ 107 (BT_BITOUL32(nbits) * sizeof (uint_t)) 108#define BT_TEST32(bitmap, bitindex) \ 109 ((BT_WIM32((bitmap), (bitindex)) & BT_BIW32(bitindex)) ? 1 : 0) 110#define BT_SET32(bitmap, bitindex) \ 111 { BT_WIM32((bitmap), (bitindex)) |= BT_BIW32(bitindex); } 112#define BT_CLEAR32(bitmap, bitindex) \ 113 { BT_WIM32((bitmap), (bitindex)) &= ~BT_BIW32(bitindex); } 114#endif /* _LP64 */ 115 116#endif /* _COMPAT_OPENSOLARIS_SYS_BITMAP_H */ 117