/usr/include/mysql/my_alloc.h is in libmysqlclient-dev 5.5.54-0ubuntu0.12.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | /* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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
#ifdef __cplusplus
extern "C" {
#endif
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 */
size_t min_malloc;
size_t 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;
#ifdef __cplusplus
}
#endif
#endif
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