summaryrefslogtreecommitdiffstats
path: root/storage/myisammrg/myrg_locking.c
diff options
context:
space:
mode:
Diffstat (limited to 'storage/myisammrg/myrg_locking.c')
-rw-r--r--storage/myisammrg/myrg_locking.c45
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);
+}