59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
#ifndef _GWBITMASK_H
|
|
#define _GWBITMASK_H
|
|
/*
|
|
* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
|
|
* software: you can redistribute it and/or modify it under the terms of the
|
|
* GNU General Public License as published by the Free Software Foundation,
|
|
* version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 51
|
|
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Copyright MariaDB Corporation Ab 2013-2014
|
|
*/
|
|
#include <spinlock.h>
|
|
|
|
/**
|
|
* @file gwbitmask.h An implementation of an arbitrarily long bitmask
|
|
*
|
|
* @verbatim
|
|
* Revision History
|
|
*
|
|
* Date Who Description
|
|
* 28/06/13 Mark Riddoch Initial implementation
|
|
* 17/10/15 Martin Brampton Add bitmask_render_readable
|
|
*
|
|
* @endverbatim
|
|
*/
|
|
|
|
/* Both these numbers MUST be exact multiples of 8 */
|
|
#define BIT_LENGTH_INITIAL 256 /**< Initial number of bits in the bitmask */
|
|
#define BIT_LENGTH_INC 256 /**< Number of bits to add on each increment */
|
|
|
|
/**
|
|
* The bitmask structure used to store an arbitrary large bitmask
|
|
*/
|
|
typedef struct
|
|
{
|
|
SPINLOCK lock; /**< Lock to protect the bitmask */
|
|
unsigned char *bits; /**< Pointer to the bits themselves */
|
|
unsigned int length; /**< The number of bits in the bitmask */
|
|
} GWBITMASK;
|
|
|
|
extern void bitmask_init(GWBITMASK *);
|
|
extern void bitmask_free(GWBITMASK *);
|
|
extern void bitmask_set(GWBITMASK *, int);
|
|
extern void bitmask_clear(GWBITMASK *, int);
|
|
extern int bitmask_isset(GWBITMASK *, int);
|
|
extern int bitmask_isallclear(GWBITMASK *);
|
|
extern void bitmask_copy(GWBITMASK *, GWBITMASK *);
|
|
extern char *bitmask_render_readable(GWBITMASK *bitmask);
|
|
|
|
#endif
|