183 lines
5.2 KiB
C
183 lines
5.2 KiB
C
/*
|
|
* 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
|
|
|
|
#if defined(__GNUC__) && defined(_ASM_INLINES) && \
|
|
(defined(__i386) || defined(__amd64))
|
|
#include <asm/bitmap.h>
|
|
#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 */
|
|
|
|
#ifdef _LP64
|
|
#define BT_NBIPUL32 (1 << BT_ULSHIFT32) /* n bits per ulong_t */
|
|
#define BT_ULMASK32 (BT_NBIPUL32 - 1) /* to extract bit index */
|
|
#define BT_ULMAXMASK 0xffffffffffffffff /* used by bt_getlowbit */
|
|
#else
|
|
#define BT_ULMAXMASK 0xffffffff
|
|
#endif
|
|
|
|
/*
|
|
* 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))
|
|
|
|
#ifdef _LP64
|
|
#define BT_WIM32(bitmap, bitindex) \
|
|
((bitmap)[(bitindex) >> BT_ULSHIFT32])
|
|
|
|
#define BT_BIW32(bitindex) \
|
|
(1UL << ((bitindex) & BT_ULMASK32))
|
|
#endif
|
|
|
|
/*
|
|
* 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 _LP64
|
|
#define BT_BITOUL32(nbits) \
|
|
(((nbits) + BT_NBIPUL32 - 1l) / BT_NBIPUL32)
|
|
#define BT_SIZEOFMAP32(nbits) \
|
|
(BT_BITOUL32(nbits) * sizeof (uint_t))
|
|
#define BT_TEST32(bitmap, bitindex) \
|
|
((BT_WIM32((bitmap), (bitindex)) & BT_BIW32(bitindex)) ? 1 : 0)
|
|
#define BT_SET32(bitmap, bitindex) \
|
|
{ BT_WIM32((bitmap), (bitindex)) |= BT_BIW32(bitindex); }
|
|
#define BT_CLEAR32(bitmap, bitindex) \
|
|
{ BT_WIM32((bitmap), (bitindex)) &= ~BT_BIW32(bitindex); }
|
|
#endif /* _LP64 */
|
|
|
|
|
|
/*
|
|
* BIT_ONLYONESET is a private macro not designed for bitmaps of
|
|
* arbitrary size. u must be an unsigned integer/long. It returns
|
|
* true if one and only one bit is set in u.
|
|
*/
|
|
#define BIT_ONLYONESET(u) \
|
|
((((u) == 0) ? 0 : ((u) & ((u) - 1)) == 0))
|
|
|
|
#ifndef _ASM
|
|
|
|
/*
|
|
* return next available bit index from map with specified number of bits
|
|
*/
|
|
extern index_t bt_availbit(ulong_t *bitmap, size_t nbits);
|
|
/*
|
|
* find the highest order bit that is on, and is within or below
|
|
* the word specified by wx
|
|
*/
|
|
extern int bt_gethighbit(ulong_t *mapp, int wx);
|
|
extern int bt_range(ulong_t *bitmap, size_t *pos1, size_t *pos2,
|
|
size_t end_pos);
|
|
extern int bt_getlowbit(ulong_t *bitmap, size_t start, size_t stop);
|
|
extern void bt_copy(ulong_t *, ulong_t *, ulong_t);
|
|
|
|
/*
|
|
* find the parity
|
|
*/
|
|
extern int odd_parity(ulong_t);
|
|
|
|
/*
|
|
* Atomically set/clear bits
|
|
* Atomic exclusive operations will set "result" to "-1"
|
|
* if the bit is already set/cleared. "result" will be set
|
|
* to 0 otherwise.
|
|
*/
|
|
#define BT_ATOMIC_SET(bitmap, bitindex) \
|
|
{ atomic_or_ulong(&(BT_WIM(bitmap, bitindex)), BT_BIW(bitindex)); }
|
|
#define BT_ATOMIC_CLEAR(bitmap, bitindex) \
|
|
{ atomic_and_ulong(&(BT_WIM(bitmap, bitindex)), ~BT_BIW(bitindex)); }
|
|
|
|
#define BT_ATOMIC_SET_EXCL(bitmap, bitindex, result) \
|
|
{ result = atomic_set_long_excl(&(BT_WIM(bitmap, bitindex)), \
|
|
(bitindex) % BT_NBIPUL); }
|
|
#define BT_ATOMIC_CLEAR_EXCL(bitmap, bitindex, result) \
|
|
{ result = atomic_clear_long_excl(&(BT_WIM(bitmap, bitindex)), \
|
|
(bitindex) % BT_NBIPUL); }
|
|
|
|
/*
|
|
* Extracts bits between index h (high, inclusive) and l (low, exclusive) from
|
|
* u, which must be an unsigned integer.
|
|
*/
|
|
#define BITX(u, h, l) (((u) >> (l)) & ((1LU << ((h) - (l) + 1LU)) - 1LU))
|
|
|
|
#endif /* _ASM */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_BITMAP_H */
|