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-rw-r--r--myisam/mi_changed.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/myisam/mi_changed.c b/myisam/mi_changed.c
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+++ b/myisam/mi_changed.c
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+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+ 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; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+
+/* Check if somebody has changed table since last check. */
+
+#include "myisamdef.h"
+
+ /* Return 0 if table isn't changed */
+
+int mi_is_changed(MI_INFO *info)
+{
+ int result;
+ DBUG_ENTER("mi_is_changed");
+ if (_mi_readinfo(info,F_RDLCK,1))
+ DBUG_RETURN(-1);
+ VOID(_mi_writeinfo(info,0));
+ result=(int) info->data_changed;
+ info->data_changed=0;
+ DBUG_PRINT("exit",("result: %d",result));
+ DBUG_RETURN(result);
+}