1/* Copyright (c) 2000-2002, 2005-2007 MySQL AB
2 Use is subject to license terms
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
16
17/*
18 Lock databases against read or write.
19*/
20
21#include "myrg_def.h"
22
23int myrg_lock_database(MYRG_INFO *info, int lock_type)
24{
25 int error,new_error;
26 MYRG_TABLE *file;
27
28 error=0;
29 for (file=info->open_tables ; file != info->end_table ; file++)
30 {
31 DBUG_ASSERT(file->table->open_flag & HA_OPEN_MERGE_TABLE);
32
33 if ((new_error=mi_lock_database(file->table,lock_type)))
34 {
35 error=new_error;
36 if (lock_type != F_UNLCK)
37 {
38 while (--file >= info->open_tables)
39 mi_lock_database(file->table, F_UNLCK);
40 break;
41 }
42 }
43 }
44 return(error);
45}
46