usr/src/uts/common/sys/bitset.h

   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  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 #ifndef _BITSET_H
  26 #define _BITSET_H
  27
  28 #ifdef  __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 #if (defined(_KERNEL) || defined(_KMEMUSER))
  33 #include <sys/bitmap.h>
  34 #include <sys/types.h>
  35
  36 typedef struct bitset {
  37         ulong_t *bs_set;
  38         uint_t  bs_words;
  39         uint_t  bs_fanout;
  40 } bitset_t;
  41
  42 /*
  43  * Bitset initialiation / teardown
  44  */
  45 void            bitset_init(bitset_t *);
  46 void            bitset_init_fanout(bitset_t *, uint_t);
  47 void            bitset_fini(bitset_t *);
  48
  49 /*
  50  * Resize / query a bitset's holding capacity
  51  */
  52 void            bitset_resize(bitset_t *, uint_t);
  53 uint_t          bitset_capacity(bitset_t *);
  54
  55 /*
  56  * Set / clear a bit in the set
  57  */
  58 void            bitset_add(bitset_t *, uint_t);
  59 void            bitset_del(bitset_t *, uint_t);
  60
  61 /*
  62  * Atomic operations
  63  */
  64 void            bitset_atomic_add(bitset_t *, uint_t);
  65 void            bitset_atomic_del(bitset_t *, uint_t);
  66 int             bitset_atomic_test_and_add(bitset_t *, uint_t);
  67 int             bitset_atomic_test_and_del(bitset_t *, uint_t);
  68
  69 /*
  70  * Bitset queries
  71  */
  72 int             bitset_in_set(bitset_t *, uint_t);
  73 int             bitset_is_null(bitset_t *);
  74 uint_t          bitset_find(bitset_t *);
  75
  76 /*
  77  * Bitset computations
  78  */
  79 int             bitset_and(bitset_t *, bitset_t *, bitset_t *);
  80 int             bitset_or(bitset_t *, bitset_t *, bitset_t *);
  81 int             bitset_xor(bitset_t *, bitset_t *, bitset_t *);
  82
  83 /*
  84  * Miscellaneous bitset operations
  85  */
  86 void            bitset_zero(bitset_t *);
  87 void            bitset_copy(bitset_t *, bitset_t *);
  88 int             bitset_match(bitset_t *, bitset_t *);
  89
  90 #endif  /* !_KERNEL && !_KMEMUSER */
  91
  92 #ifdef  __cplusplus
  93 }
  94 #endif
  95
  96 #endif /* _BITSET_H */