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 * $FreeBSD$ 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