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File my_alloc.h

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 02110-1335  USA */

/* 
   Data structures for mysys/my_alloc.c (root memory allocator)
*/

#ifndef _my_alloc_h
#define _my_alloc_h

#include "mysql/psi/psi_base.h"

#define ALLOC_MAX_BLOCK_TO_DROP			4096
#define ALLOC_MAX_BLOCK_USAGE_BEFORE_DROP	10

#define ROOT_FLAG_READ_ONLY       4

#ifdef __cplusplus
extern "C" {
#endif

typedef struct st_used_mem
{				   /* struct for once_alloc (block) */
  struct st_used_mem *next;	   /* Next block in use */
  size_t left;                     /* memory left in block  */
  size_t 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 short first_block_usage;
  unsigned short flags;

void (*error_handler)(void);

PSI_memory_key m_psi_key;
} MEM_ROOT;

#ifdef  __cplusplus
}
#endif

#endif

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-08-07 11:01:51
..	DIR	-	drwxr-xr-x	2025-08-07 11:01:51
mysql	DIR	-	drwxr-xr-x	2025-08-07 11:01:51
private	DIR	-	drwxr-xr-x	2025-08-07 11:01:51
big_endian.h	text/plain	4.4 KB	-rw-r--r--	2025-07-28 03:52:25
byte_order_generic.h	text/plain	5.12 KB	-rw-r--r--	2025-07-28 03:52:25
byte_order_generic_x86.h	text/plain	4.18 KB	-rw-r--r--	2025-07-28 03:52:25
byte_order_generic_x86_64.h	text/plain	4.03 KB	-rw-r--r--	2025-07-28 03:52:25
decimal.h	text/x-c	4.81 KB	-rw-r--r--	2025-07-28 03:52:25
errmsg.h	text/x-c	4.31 KB	-rw-r--r--	2025-07-28 03:52:25
handler_ername.h	text/plain	4.5 KB	-rw-r--r--	2025-07-28 03:52:25
handler_state.h	text/plain	758 B	-rw-r--r--	2025-07-28 03:52:25
json_lib.h	text/x-c	13.45 KB	-rw-r--r--	2025-07-28 03:52:25
keycache.h	text/x-c	8.62 KB	-rw-r--r--	2025-07-28 03:52:25
little_endian.h	text/plain	3.49 KB	-rw-r--r--	2025-07-28 03:52:25
m_ctype.h	text/x-c	63.76 KB	-rw-r--r--	2025-07-28 03:52:25
m_string.h	text/x-c	10.07 KB	-rw-r--r--	2025-07-28 03:52:25
ma_dyncol.h	text/x-c	7.86 KB	-rw-r--r--	2025-07-28 03:52:25
mariadb_capi_rename.h	text/plain	3.34 KB	-rw-r--r--	2025-07-28 03:52:25
my_alloc.h	text/x-c	2.02 KB	-rw-r--r--	2025-07-28 03:52:25
my_alloca.h	text/x-c	1.4 KB	-rw-r--r--	2025-07-28 03:52:25
my_attribute.h	text/plain	3.49 KB	-rw-r--r--	2025-07-28 03:52:25
my_byteorder.h	text/x-c	2 KB	-rw-r--r--	2025-07-28 03:52:25
my_cmp.h	text/x-c	914 B	-rw-r--r--	2025-07-28 03:52:25
my_compiler.h	text/x-c++	5.14 KB	-rw-r--r--	2025-07-28 03:52:25
my_config.h	text/plain	14.23 KB	-rw-r--r--	2025-07-28 03:57:47
my_dbug.h	text/x-c	9.87 KB	-rw-r--r--	2025-07-28 03:52:25
my_decimal_limits.h	text/plain	2.03 KB	-rw-r--r--	2025-07-28 03:52:25
my_dir.h	text/x-c	3.8 KB	-rw-r--r--	2025-07-28 03:52:25
my_getopt.h	text/x-c	5.47 KB	-rw-r--r--	2025-07-28 03:52:25
my_global.h	text/x-c	32.02 KB	-rw-r--r--	2025-07-28 03:52:25
my_list.h	text/x-c	1.47 KB	-rw-r--r--	2025-07-28 03:52:25
my_net.h	text/x-c	1.98 KB	-rw-r--r--	2025-07-28 03:52:25
my_pthread.h	text/x-c	26.97 KB	-rw-r--r--	2025-07-28 03:52:25
my_sys.h	text/x-c	43.2 KB	-rw-r--r--	2025-07-28 03:52:25
my_valgrind.h	text/plain	4.44 KB	-rw-r--r--	2025-07-28 03:52:25
my_xml.h	text/x-c	2.77 KB	-rw-r--r--	2025-07-28 03:52:25
mysql.h	text/x-c	38.8 KB	-rw-r--r--	2025-07-28 03:52:25
mysql_com.h	text/x-c	30.14 KB	-rw-r--r--	2025-07-28 03:52:25
mysql_com_server.h	text/x-c	1.28 KB	-rw-r--r--	2025-07-28 03:52:25
mysql_embed.h	text/plain	1.1 KB	-rw-r--r--	2025-07-28 03:52:25
mysql_time.h	text/plain	2.36 KB	-rw-r--r--	2025-07-28 03:52:25
mysql_version.h	text/x-c	1.25 KB	-rw-r--r--	2025-07-28 03:57:47
mysqld_ername.h	text/plain	124.53 KB	-rw-r--r--	2025-07-28 04:21:56
mysqld_error.h	text/x-Algol68	46.87 KB	-rw-r--r--	2025-07-28 04:21:56
pack.h	text/x-c	1.08 KB	-rw-r--r--	2025-07-28 03:52:25
sql_common.h	text/x-c	5.14 KB	-rw-r--r--	2025-07-28 03:52:25
sql_state.h	text/x-Algol68	14.55 KB	-rw-r--r--	2025-07-28 04:21:56
sslopt-case.h	text/plain	1.5 KB	-rw-r--r--	2025-07-28 03:52:25
sslopt-longopts.h	text/plain	2.59 KB	-rw-r--r--	2025-07-28 03:52:25
sslopt-vars.h	text/plain	1.37 KB	-rw-r--r--	2025-07-28 03:52:25
typelib.h	text/x-c	2.34 KB	-rw-r--r--	2025-07-28 03:52:25

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