1/* -*- c-basic-offset: 2 -*- */
2/*
3 Copyright(C) 2012 Kouhei Sutou <kou@clear-code.com>
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18*/
19
20#include "mrn_auto_increment_value_lock.hpp"
21
22#if MYSQL_VERSION_ID >= 50500
23# define AUTO_INCREMENT_VALUE_MUTEX(table_share) (&(table_share->LOCK_ha_data))
24#else
25# define AUTO_INCREMENT_VALUE_MUTEX(table_share) (&(table_share->mutex))
26#endif
27
28namespace mrn {
29 AutoIncrementValueLock::AutoIncrementValueLock(TABLE_SHARE *table_share)
30 : table_share_(table_share),
31 need_lock_(table_share_->tmp_table == NO_TMP_TABLE) {
32 if (need_lock_) {
33 mysql_mutex_lock(AUTO_INCREMENT_VALUE_MUTEX(table_share_));
34 }
35 }
36
37 AutoIncrementValueLock::~AutoIncrementValueLock() {
38 if (need_lock_) {
39 mysql_mutex_unlock(AUTO_INCREMENT_VALUE_MUTEX(table_share_));
40 }
41 }
42}
43