54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
#ifndef _GWBITMASK_H
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#define _GWBITMASK_H
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/*
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* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright MariaDB Corporation Ab 2013-2014
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*/
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#include <spinlock.h>
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/**
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* @file gwbitmask.h An implementation of an arbitarly long bitmask
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 28/06/13 Mark Riddoch Initial implementation
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*
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* @endverbatim
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*/
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#define BIT_LENGTH_INITIAL 32 /**< Initial number of bits in the bitmask */
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#define BIT_LENGTH_INC 32 /**< Number of bits to add on each increment */
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/**
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* The bitmask structure used to store an arbitary large bitmask
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*/
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typedef struct {
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SPINLOCK lock; /**< Lock to protect the bitmask */
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unsigned char *bits; /**< Pointer to the bits themselves */
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unsigned int length; /**< The number of bits in the bitmask */
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} GWBITMASK;
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extern void bitmask_init(GWBITMASK *);
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extern void bitmask_free(GWBITMASK *);
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extern void bitmask_set(GWBITMASK *, int);
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extern void bitmask_clear(GWBITMASK *, int);
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extern int bitmask_isset(GWBITMASK *, int);
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extern int bitmask_isallclear(GWBITMASK *);
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extern void bitmask_copy(GWBITMASK *, GWBITMASK *);
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#endif
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