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/* Copyright (C) 2000-2002 MySQL 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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++)
{
#ifdef __WIN__
/*
Make sure this table is marked as owned by a merge table.
The semaphore is never released as long as table remains
in memory. This should be refactored into a more generic
approach (observer pattern)
*/
(file->table)->owned_by_merge = TRUE;
#endif
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);
}
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