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 * $FreeBSD: releng/10.3/sys/cddl/compat/opensolaris/sys/bitmap.h 178414 2008-04-22 07:43:00Z jb $ 22 */ 23 24/* 25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 30/* All Rights Reserved */ 31 32 33#ifndef _COMPAT_OPENSOLARIS_SYS_BITMAP_H 34#define _COMPAT_OPENSOLARIS_SYS_BITMAP_H 35 36#include <sys/atomic.h> 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#ifdef _LP64 56#define BT_NBIPUL32 (1 << BT_ULSHIFT32) /* n bits per ulong_t */ 57#define BT_ULMASK32 (BT_NBIPUL32 - 1) /* to extract bit index */ 58#define BT_ULMAXMASK 0xffffffffffffffff /* used by bt_getlowbit */ 59#else 60#define BT_ULMAXMASK 0xffffffff 61#endif 62 63/* 64 * bitmap is a ulong_t *, bitindex an index_t 65 * 66 * The macros BT_WIM and BT_BIW internal; there is no need 67 * for users of this package to use them. 68 */ 69 70/* 71 * word in map 72 */ 73#define BT_WIM(bitmap, bitindex) \ 74 ((bitmap)[(bitindex) >> BT_ULSHIFT]) 75/* 76 * bit in word 77 */ 78#define BT_BIW(bitindex) \ 79 (1UL << ((bitindex) & BT_ULMASK)) 80 81#ifdef _LP64 82#define BT_WIM32(bitmap, bitindex) \ 83 ((bitmap)[(bitindex) >> BT_ULSHIFT32]) 84 85#define BT_BIW32(bitindex) \ 86 (1UL << ((bitindex) & BT_ULMASK32)) 87#endif 88 89/* 90 * These are public macros 91 * 92 * BT_BITOUL == n bits to n ulong_t's 93 */ 94#define BT_BITOUL(nbits) \ 95 (((nbits) + BT_NBIPUL - 1l) / BT_NBIPUL) 96#define BT_SIZEOFMAP(nbits) \ 97 (BT_BITOUL(nbits) * sizeof (ulong_t)) 98#define BT_TEST(bitmap, bitindex) \ 99 ((BT_WIM((bitmap), (bitindex)) & BT_BIW(bitindex)) ? 1 : 0) 100#define BT_SET(bitmap, bitindex) \ 101 { BT_WIM((bitmap), (bitindex)) |= BT_BIW(bitindex); } 102#define BT_CLEAR(bitmap, bitindex) \ 103 { BT_WIM((bitmap), (bitindex)) &= ~BT_BIW(bitindex); } 104 105#ifdef _LP64 106#define BT_BITOUL32(nbits) \ 107 (((nbits) + BT_NBIPUL32 - 1l) / BT_NBIPUL32) 108#define BT_SIZEOFMAP32(nbits) \ 109 (BT_BITOUL32(nbits) * sizeof (uint_t)) 110#define BT_TEST32(bitmap, bitindex) \ 111 ((BT_WIM32((bitmap), (bitindex)) & BT_BIW32(bitindex)) ? 1 : 0) 112#define BT_SET32(bitmap, bitindex) \ 113 { BT_WIM32((bitmap), (bitindex)) |= BT_BIW32(bitindex); } 114#define BT_CLEAR32(bitmap, bitindex) \ 115 { BT_WIM32((bitmap), (bitindex)) &= ~BT_BIW32(bitindex); } 116#endif /* _LP64 */ 117 118#endif /* _COMPAT_OPENSOLARIS_SYS_BITMAP_H */ 119