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/* Copyright (C) 2000-2001, 2003 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "myisam_priv.h"
using namespace std;
using namespace drizzled;
/* if flag == HA_PANIC_CLOSE then all misam files are closed */
/* if flag == HA_PANIC_WRITE then all misam files are unlocked and
all changed data in single user misam is written to file */
/* if flag == HA_PANIC_READ then all misam files that was locked when
mi_panic(HA_PANIC_WRITE) was done is locked. A mi_readinfo() is
done for all single user files to get changes in database */
int mi_panic(enum ha_panic_function flag)
{
int error=0;
MI_INFO *info;
THR_LOCK_myisam.lock();
list<MI_INFO *>::iterator it= myisam_open_list.begin();
while (it != myisam_open_list.end())
{
info= *it;
switch (flag) {
case HA_PANIC_CLOSE:
THR_LOCK_myisam.unlock(); /* Not exactly right... */
if (mi_close(info))
error=errno;
THR_LOCK_myisam.lock();
break;
case HA_PANIC_WRITE: /* Do this to free databases */
#ifdef CANT_OPEN_FILES_TWICE
if (info->s->options & HA_OPTION_READ_ONLY_DATA)
break;
#endif
if (info->opt_flag & WRITE_CACHE_USED)
if (info->rec_cache.flush())
error=errno;
if (info->opt_flag & READ_CACHE_USED)
{
if (info->rec_cache.flush())
error=errno;
info->rec_cache.reinit_io_cache(internal::READ_CACHE,0, (bool) (info->lock_type != F_UNLCK),1);
}
if (info->lock_type != F_UNLCK && ! info->was_locked)
{
info->was_locked=info->lock_type;
if (mi_lock_database(info,F_UNLCK))
error=errno;
}
#ifdef CANT_OPEN_FILES_TWICE
if (info->s->kfile >= 0 && internal::my_close(info->s->kfile,MYF(0)))
error = errno;
if (info->dfile >= 0 && internal::my_close(info->dfile,MYF(0)))
error = errno;
info->s->kfile=info->dfile= -1; /* Files aren't open anymore */
break;
#endif
case HA_PANIC_READ: /* Restore to before WRITE */
#ifdef CANT_OPEN_FILES_TWICE
{ /* Open closed files */
char name_buff[FN_REFLEN];
if (info->s->kfile < 0)
if ((info->s->kfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
N_NAME_IEXT,4),info->mode,
MYF(MY_WME))) < 0)
error = errno;
if (info->dfile < 0)
{
if ((info->dfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
N_NAME_DEXT,4),info->mode,
MYF(MY_WME))) < 0)
error = errno;
info->rec_cache.file=info->dfile;
}
}
#endif
if (info->was_locked)
{
if (mi_lock_database(info, info->was_locked))
error=errno;
info->was_locked=0;
}
break;
}
++it;
}
THR_LOCK_myisam.unlock();
if (!error)
return(0);
return(errno=error);
} /* mi_panic */
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