mirror of
https://github.com/nzp-team/fteqw.git
synced 2024-11-27 14:12:25 +00:00
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
|
/* 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; version 2 of the License.
|
||
|
|
|
||
|
|
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 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
Data structures for mysys/my_alloc.c (root memory allocator)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _my_alloc_h
|
||
|
|
#define _my_alloc_h
|
||
|
|
|
||
|
|
#define ALLOC_MAX_BLOCK_TO_DROP 4096
|
||
|
|
#define ALLOC_MAX_BLOCK_USAGE_BEFORE_DROP 10
|
||
|
|
|
||
|
|
typedef struct st_used_mem
|
||
|
|
{ /* struct for once_alloc (block) */
|
||
|
|
struct st_used_mem *next; /* Next block in use */
|
||
|
|
unsigned int left; /* memory left in block */
|
||
|
|
unsigned int size; /* size of block */
|
||
|
|
} USED_MEM;
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct st_mem_root
|
||
|
|
{
|
||
|
|
USED_MEM *free; /* blocks with free memory in it */
|
||
|
|
USED_MEM *used; /* blocks almost without free memory */
|
||
|
|
USED_MEM *pre_alloc; /* preallocated block */
|
||
|
|
/* if block have less memory it will be put in 'used' list */
|
||
|
|
unsigned int min_malloc;
|
||
|
|
unsigned int block_size; /* initial block size */
|
||
|
|
unsigned int block_num; /* allocated blocks counter */
|
||
|
|
/*
|
||
|
|
first free block in queue test counter (if it exceed
|
||
|
|
MAX_BLOCK_USAGE_BEFORE_DROP block will be dropped in 'used' list)
|
||
|
|
*/
|
||
|
|
unsigned int first_block_usage;
|
||
|
|
|
||
|
|
void (*error_handler)(void);
|
||
|
|
} MEM_ROOT;
|
||
|
|
#endif
|