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