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/* Copyright (C) 2000 MySQL AB
This program 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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef _my_bitmap_h_
#define _my_bitmap_h_
#include <my_pthread.h>
#define MY_BIT_NONE (~(uint) 0)
typedef struct st_bitmap
{
uchar *bitmap;
uint bitmap_size;
my_bool thread_safe; /* set if several threads access the bitmap */
/*
mutex will be acquired for the duration of each bitmap operation if
thread_safe flag is set. Otherwise, we optimize by not acquiring the
mutex
*/
#ifdef THREAD
pthread_mutex_t mutex;
#endif
} MY_BITMAP;
#ifdef __cplusplus
extern "C" {
#endif
extern my_bool bitmap_init(MY_BITMAP *bitmap, uint bitmap_size,
my_bool thread_safe);
extern void bitmap_free(MY_BITMAP *bitmap);
extern void bitmap_set_bit(MY_BITMAP *bitmap, uint bitmap_bit);
extern uint bitmap_set_next(MY_BITMAP *bitmap);
extern void bitmap_set_all(MY_BITMAP* bitmap);
extern my_bool bitmap_is_set(MY_BITMAP* bitmap, uint bitmap_bit);
extern void bitmap_clear_all(MY_BITMAP* bitmap);
extern void bitmap_clear_bit(MY_BITMAP *bitmap, uint bitmap_bit);
#ifdef __cplusplus
}
#endif
#endif /* _my_bitmap_h_ */
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