changed.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:1k
- /* 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 "isamdef.h"
- /* Return 0 if table isn't changed */
- int nisam_is_changed(N_INFO *info)
- {
- int result;
- DBUG_ENTER("nisam_is_changed");
- #ifndef NO_LOCKING
- if (_nisam_readinfo(info,F_RDLCK,1)) DBUG_RETURN(-1);
- VOID(_nisam_writeinfo(info,0));
- #endif
- result=(int) info->data_changed;
- info->data_changed=0;
- DBUG_PRINT("exit",("result: %d",result));
- DBUG_RETURN(result);
- }