1 files changed, 42 insertions, 0 deletions
diff --git a/storage/mroonga/lib/mrn_auto_increment_value_lock.cpp b/storage/mroonga/lib/mrn_auto_increment_value_lock.cpp
new file mode 100644
index 00000000..4baef101
--- /dev/null
+++ b/storage/mroonga/lib/mrn_auto_increment_value_lock.cpp
@@ -0,0 +1,42 @@
+/* -*- c-basic-offset: 2 -*- */
+/*
+  Copyright(C) 2012 Kouhei Sutou <kou@clear-code.com>
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA
+*/
+
+#include "mrn_auto_increment_value_lock.hpp"
+
+#if MYSQL_VERSION_ID >= 50500
+#  define AUTO_INCREMENT_VALUE_MUTEX(table_share) (&(table_share->LOCK_ha_data))
+#else
+#  define AUTO_INCREMENT_VALUE_MUTEX(table_share) (&(table_share->mutex))
+#endif
+
+namespace mrn {
+  AutoIncrementValueLock::AutoIncrementValueLock(TABLE_SHARE *table_share)
+    : table_share_(table_share),
+      need_lock_(table_share_->tmp_table == NO_TMP_TABLE) {
+    if (need_lock_) {
+      mysql_mutex_lock(AUTO_INCREMENT_VALUE_MUTEX(table_share_));
+    }
+  }
+
+  AutoIncrementValueLock::~AutoIncrementValueLock() {
+    if (need_lock_) {
+      mysql_mutex_unlock(AUTO_INCREMENT_VALUE_MUTEX(table_share_));
+    }
+  }
+}