acb19c083d
The hard thread limit is now defined in maxscale/limits.h. If the specified number of threads is larger than that, it will be adjusted down. The size of the GWBITMASK is now also defined using that number, so there will always be enough bits for representing all threads.
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
#ifndef _GWBITMASK_H
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#define _GWBITMASK_H
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include <spinlock.h>
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#include <maxscale/limits.h>
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/**
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* @file gwbitmask.h An implementation of an arbitrarily 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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* 17/10/15 Martin Brampton Add bitmask_render_readable
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*
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* @endverbatim
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*/
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/* This number MUST an be exact multiple of 8 */
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#define MXS_BITMASK_LENGTH (MXS_MAX_THREADS + 1) /**< Number of bits in the bitmask */
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#define MXS_BITMASK_SIZE (MXS_BITMASK_LENGTH / 8) /**< Number of bytes in the bitmask */
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/**
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* The bitmask structure used to store a fixed size bitmask
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*/
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typedef struct
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{
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SPINLOCK lock; /**< Lock to protect the bitmask */
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unsigned char bits[MXS_BITMASK_SIZE]; /**< The bits themselves */
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} GWBITMASK;
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#define GWBITMASK_INIT {SPINLOCK_INIT}
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extern void bitmask_init(GWBITMASK *);
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extern void bitmask_free(GWBITMASK *);
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extern int bitmask_set(GWBITMASK *, int);
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extern int bitmask_clear(GWBITMASK *, int);
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extern int bitmask_clear_without_spinlock(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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extern char *bitmask_render_readable(GWBITMASK *);
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#endif
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