/usr/include/mysql/private/rpl_tblmap.h is in libmariadbclient-dev 5.5.36-1.
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 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /* Copyright (c) 2005, 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 */
#ifndef TABLE_MAPPING_H
#define TABLE_MAPPING_H
/* Forward declarations */
#ifndef MYSQL_CLIENT
struct TABLE;
#else
class Table_map_log_event;
typedef Table_map_log_event TABLE;
void free_table_map_log_event(TABLE *table);
#endif
/*
CLASS table_mapping
RESPONSIBILITIES
The table mapping is used to map table id's to table pointers
COLLABORATION
RELAY_LOG For mapping table id:s to tables when receiving events.
*/
/*
Guilhem to Mats:
in the table_mapping class, the memory is allocated and never freed (until
destruction). So this is a good candidate for allocating inside a MEM_ROOT:
it gives the efficient allocation in chunks (like in expand()). So I have
introduced a MEM_ROOT.
Note that inheriting from Sql_alloc had no effect: it has effects only when
"ptr= new table_mapping" is called, and this is never called. And it would
then allocate from thd->mem_root which is a highly volatile object (reset
from example after executing each query, see dispatch_command(), it has a
free_root() at end); as the table_mapping object is supposed to live longer
than a query, it was dangerous.
A dedicated MEM_ROOT needs to be used, see below.
*/
#include "hash.h" /* HASH */
class table_mapping {
private:
MEM_ROOT m_mem_root;
public:
enum enum_error {
ERR_NO_ERROR = 0,
ERR_LIMIT_EXCEEDED,
ERR_MEMORY_ALLOCATION
};
table_mapping();
~table_mapping();
TABLE* get_table(ulong table_id);
int set_table(ulong table_id, TABLE* table);
int remove_table(ulong table_id);
void clear_tables();
ulong count() const { return m_table_ids.records; }
private:
/*
This is a POD (Plain Old Data). Keep it that way (we apply offsetof() to
it, which only works for PODs)
*/
struct entry {
ulong table_id;
union {
TABLE *table;
entry *next;
};
};
entry *find_entry(ulong table_id)
{
return (entry *) my_hash_search(&m_table_ids,
(uchar*)&table_id,
sizeof(table_id));
}
int expand();
/*
Head of the list of free entries; "free" in the sense that it's an
allocated entry free for use, NOT in the sense that it's freed
memory.
*/
entry *m_free;
/* Correspondance between an id (a number) and a TABLE object */
HASH m_table_ids;
};
#endif
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