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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _BITSET_H
  27 #define _BITSET_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #if (defined(_KERNEL) || defined(_KMEMUSER))
  34 #include <sys/bitmap.h>
  35 #include <sys/types.h>
  36
  37 typedef struct bitset {
  38         ulong_t *bs_set;
  39         uint_t  bs_words;
  40 } bitset_t;
  41
  42 /*
  43  * Bitset initialiation / teardown
  44  */
  45 void            bitset_init(bitset_t *);
  46 void            bitset_fini(bitset_t *);
  47
  48 /*
  49  * Resize / query a bitset's holding capacity
  50  */
  51 void            bitset_resize(bitset_t *, uint_t);
  52 uint_t          bitset_capacity(bitset_t *);
  53
  54 /*
  55  * Set / clear a bit in the set
  56  */
  57 void            bitset_add(bitset_t *, uint_t);
  58 void            bitset_del(bitset_t *, uint_t);
  59
  60 /*
  61  * Atomic operations
  62  */
  63 void            bitset_atomic_add(bitset_t *, uint_t);
  64 void            bitset_atomic_del(bitset_t *, uint_t);
  65 int             bitset_atomic_test_and_add(bitset_t *, uint_t);
  66 int             bitset_atomic_test_and_del(bitset_t *, uint_t);
  67
  68 /*
  69  * Bitset queries
  70  */
  71 int             bitset_in_set(bitset_t *, uint_t);
  72 int             bitset_is_null(bitset_t *);
  73 uint_t          bitset_find(bitset_t *);
  74
  75 #endif  /* !_KERNEL && !_KMEMUSER */
  76
  77 #ifdef  __cplusplus
  78 }
  79 #endif
  80
  81 #endif /* _BITSET_H */