/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ #ifndef _SYS_BITMAP_H #define _SYS_BITMAP_H #ifdef __cplusplus extern "C" { #endif /* * Operations on bitmaps of arbitrary size * A bitmap is a vector of 1 or more ulong_t's. * The user of the package is responsible for range checks and keeping * track of sizes. */ #ifdef _LP64 #define BT_ULSHIFT 6 /* log base 2 of BT_NBIPUL, to extract word index */ #define BT_ULSHIFT32 5 /* log base 2 of BT_NBIPUL, to extract word index */ #else #define BT_ULSHIFT 5 /* log base 2 of BT_NBIPUL, to extract word index */ #endif #define BT_NBIPUL (1 << BT_ULSHIFT) /* n bits per ulong_t */ #define BT_ULMASK (BT_NBIPUL - 1) /* to extract bit index */ /* * bitmap is a ulong_t *, bitindex an index_t * * The macros BT_WIM and BT_BIW internal; there is no need * for users of this package to use them. */ /* * word in map */ #define BT_WIM(bitmap, bitindex) \ ((bitmap)[(bitindex) >> BT_ULSHIFT]) /* * bit in word */ #define BT_BIW(bitindex) \ (1UL << ((bitindex) & BT_ULMASK)) /* * These are public macros * * BT_BITOUL == n bits to n ulong_t's */ #define BT_BITOUL(nbits) \ (((nbits) + BT_NBIPUL - 1l) / BT_NBIPUL) #define BT_SIZEOFMAP(nbits) \ (BT_BITOUL(nbits) * sizeof (ulong_t)) #define BT_TEST(bitmap, bitindex) \ ((BT_WIM((bitmap), (bitindex)) & BT_BIW(bitindex)) ? 1 : 0) #define BT_SET(bitmap, bitindex) \ { BT_WIM((bitmap), (bitindex)) |= BT_BIW(bitindex); } #define BT_CLEAR(bitmap, bitindex) \ { BT_WIM((bitmap), (bitindex)) &= ~BT_BIW(bitindex); } #ifdef __cplusplus } #endif #endif /* _SYS_BITMAP_H */