mirror of
https://github.com/MariaDB/server.git
synced 2026-04-26 18:25:30 +02:00
06e1e27557
include/my_global.h: Remove dbug_assert() (One should use DBUG_ASSERT() instead) mysql-test/mysql-test-run.sh: Fixed that xterm works on Solaris 2.8. Fixed printing of errors mysql-test/r/isam.result: Removed MyISAM test from ISAM test mysql-test/t/isam.test: Removed MyISAM test from ISAM test mysys/my_alloc.c: Removed warnings mysys/my_bitmap.c: Use DBUG_ASSERT mysys/my_pthread.c: Use DBUG_ASSERT mysys/my_seek.c: More DBUG sql/ha_berkeley.cc: Use DBUG_ASSERT sql/ha_innobase.cc: Use DBUG_ASSERT sql/log.cc: Use DBUG_ASSERT sql/opt_range.cc: Use DBUG_ASSERT sql/sql_base.cc: Use DBUG_ASSERT sql/sql_handler.cc: Use DBUG_ASSERT sql/sql_load.cc: Cleanup sql/sql_parse.cc: Use DBUG_ASSERT sql/sql_repl.cc: Cleanup sql/sql_select.cc: Use DBUG_ASSERT tools/mysqlmanager.c: Cleanup
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
This library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with this library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA */
|
|
|
|
/*
|
|
Handling of uchar arrays as large bitmaps.
|
|
We assume that the size of the used bitmap is less than ~(uint) 0
|
|
|
|
TODO:
|
|
Make assembler THREAD safe versions of these using test-and-set instructions
|
|
*/
|
|
|
|
#include "mysys_priv.h"
|
|
#include <my_bitmap.h>
|
|
#include <assert.h>
|
|
|
|
my_bool bitmap_init(MY_BITMAP *map, uint bitmap_size)
|
|
{
|
|
if (!(map->bitmap=(uchar*) my_malloc((bitmap_size+7)/8,
|
|
MYF(MY_WME | MY_ZEROFILL))))
|
|
return 1;
|
|
DBUG_ASSERT(bitmap_size != ~(uint) 0);
|
|
#ifdef THREAD
|
|
pthread_mutex_init(&map->mutex, MY_MUTEX_INIT_FAST);
|
|
#endif
|
|
map->bitmap_size=bitmap_size;
|
|
return 0;
|
|
}
|
|
|
|
void bitmap_free(MY_BITMAP *map)
|
|
{
|
|
if (map->bitmap)
|
|
{
|
|
my_free((char*) map->bitmap, MYF(0));
|
|
map->bitmap=0;
|
|
#ifdef THREAD
|
|
pthread_mutex_destroy(&map->mutex);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void bitmap_set_bit(MY_BITMAP *map, uint bitmap_bit)
|
|
{
|
|
if (bitmap_bit < map->bitmap_size)
|
|
{
|
|
pthread_mutex_lock(&map->mutex);
|
|
map->bitmap[bitmap_bit / 8] |= (1 << (bitmap_bit & 7));
|
|
pthread_mutex_unlock(&map->mutex);
|
|
}
|
|
}
|
|
|
|
|
|
uint bitmap_set_next(MY_BITMAP *map)
|
|
{
|
|
uchar *bitmap=map->bitmap;
|
|
uint bit_found = MY_BIT_NONE;
|
|
uint bitmap_size=map->bitmap_size;
|
|
uint i;
|
|
|
|
pthread_mutex_lock(&map->mutex);
|
|
for (i=0; i < bitmap_size ; i++, bitmap++)
|
|
{
|
|
if (*bitmap != 0xff)
|
|
{ /* Found slot with free bit */
|
|
uint b;
|
|
for (b=0; ; b++)
|
|
{
|
|
if (!(*bitmap & (1 << b)))
|
|
{
|
|
*bitmap |= 1<<b;
|
|
bit_found = (i*8)+b;
|
|
break;
|
|
}
|
|
}
|
|
break; /* Found bit */
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&map->mutex);
|
|
return bit_found;
|
|
}
|
|
|
|
|
|
void bitmap_clear_bit(MY_BITMAP *map, uint bitmap_bit)
|
|
{
|
|
if (bitmap_bit < map->bitmap_size)
|
|
{
|
|
pthread_mutex_lock(&map->mutex);
|
|
map->bitmap[bitmap_bit / 8] &= ~ (1 << (bitmap_bit & 7));
|
|
pthread_mutex_unlock(&map->mutex);
|
|
}
|
|
}
|
|
|