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-rw-r--r--storage/myisammrg/myrg_close.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/storage/myisammrg/myrg_close.c b/storage/myisammrg/myrg_close.c
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+++ b/storage/myisammrg/myrg_close.c
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+/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+
+ 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 St, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/* close a isam-database */
+
+#include "myrg_def.h"
+
+int myrg_close(MYRG_INFO *info)
+{
+ int error=0,new_error;
+ MYRG_TABLE *file;
+ DBUG_ENTER("myrg_close");
+
+ /*
+ Assume that info->children_attached means that this is called from
+ direct use of MERGE, not from a MySQL server. In this case the
+ children must be closed and info->rec_per_key_part is part of the
+ 'info' multi_alloc.
+ If info->children_attached is false, this is called from a MySQL
+ server. Children are closed independently but info->rec_per_key_part
+ must be freed.
+ Just in case of a server panic (myrg_panic()) info->children_attached
+ might be true. We would close the children though they should be
+ closed independently and info->rec_per_key_part is not freed.
+ This should be acceptable for a panic.
+ In case of a MySQL server and no children, children_attached is
+ always true. In this case no rec_per_key_part has been allocated.
+ So it is correct to use the branch where an empty list of tables is
+ (not) closed.
+ */
+ if (info->children_attached)
+ {
+ for (file= info->open_tables; file != info->end_table; file++)
+ {
+ /* purecov: begin inspected */
+ if ((new_error= mi_close(file->table)))
+ error= new_error;
+ else
+ file->table= NULL;
+ /* purecov: end */
+ }
+ }
+ else
+ my_free(info->rec_per_key_part);
+ delete_queue(&info->by_key);
+ mysql_mutex_lock(&THR_LOCK_open);
+ myrg_open_list=list_delete(myrg_open_list,&info->open_list);
+ mysql_mutex_unlock(&THR_LOCK_open);
+ mysql_mutex_destroy(&info->mutex);
+ my_free(info);
+ if (error)
+ {
+ DBUG_RETURN(my_errno=error);
+ }
+ DBUG_RETURN(0);
+}