1 files changed, 45 insertions, 0 deletions
diff --git a/storage/myisammrg/myrg_locking.c b/storage/myisammrg/myrg_locking.c
new file mode 100644
index 00000000..a79e35d2
--- /dev/null
+++ b/storage/myisammrg/myrg_locking.c
@@ -0,0 +1,45 @@
+/* Copyright (c) 2000-2002, 2005-2007 MySQL AB
+   Use is subject to license terms
+
+   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 Street, Fifth Floor, Boston, MA  02110-1335  USA */
+
+/*
+  Lock databases against read or write.
+*/
+
+#include "myrg_def.h"
+
+int myrg_lock_database(MYRG_INFO *info, int lock_type)
+{
+  int error,new_error;
+  MYRG_TABLE *file;
+
+  error=0;
+  for (file=info->open_tables ; file != info->end_table ; file++) 
+  {
+    DBUG_ASSERT(file->table->open_flag & HA_OPEN_MERGE_TABLE);
+
+    if ((new_error=mi_lock_database(file->table,lock_type)))
+    {
+      error=new_error;
+      if (lock_type != F_UNLCK)
+      {
+        while (--file >= info->open_tables)
+          mi_lock_database(file->table, F_UNLCK);
+        break;
+      }
+    }
+  }
+  return(error);
+}