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storage/myisam/mi_panic.c
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#include "myisam_priv.h"
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using namespace std;
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using namespace drizzled;
 
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#include "myisamdef.h"
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        /* if flag == HA_PANIC_CLOSE then all misam files are closed */
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        /* if flag == HA_PANIC_WRITE then all misam files are unlocked and
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int mi_panic(enum ha_panic_function flag)
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{
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  int error=0;
 
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  LIST *list_element,*next_open;
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  MI_INFO *info;
 
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  DBUG_ENTER("mi_panic");
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  THR_LOCK_myisam.lock();
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  list<MI_INFO *>::iterator it= myisam_open_list.begin();
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  while (it != myisam_open_list.end())
 
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  pthread_mutex_lock(&THR_LOCK_myisam);
 
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  for (list_element=myisam_open_list ; list_element ; list_element=next_open)
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  {
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    info= *it;
 
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    next_open=list_element->next;               /* Save if close */
 
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    info=(MI_INFO*) list_element->data;
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    switch (flag) {
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    case HA_PANIC_CLOSE:
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      THR_LOCK_myisam.unlock(); /* Not exactly right... */
 
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      pthread_mutex_unlock(&THR_LOCK_myisam);   /* Not exactly right... */
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      if (mi_close(info))
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        error=errno;
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      THR_LOCK_myisam.lock();
 
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        error=my_errno;
 
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      pthread_mutex_lock(&THR_LOCK_myisam);
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      break;
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    case HA_PANIC_WRITE:                /* Do this to free databases */
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#ifdef CANT_OPEN_FILES_TWICE
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      if (info->s->options & HA_OPTION_READ_ONLY_DATA)
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        break;
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#endif
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      if (flush_key_blocks(info->s->getKeyCache(), info->s->kfile, FLUSH_RELEASE))
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        error=errno;
 
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      if (flush_key_blocks(info->s->key_cache, info->s->kfile, FLUSH_RELEASE))
 
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        error=my_errno;
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      if (info->opt_flag & WRITE_CACHE_USED)
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        if (flush_io_cache(&info->rec_cache))
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          error=errno;
 
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          error=my_errno;
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      if (info->opt_flag & READ_CACHE_USED)
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      {
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        if (flush_io_cache(&info->rec_cache))
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          error=errno;
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        reinit_io_cache(&info->rec_cache,internal::READ_CACHE,0,
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                       (bool) (info->lock_type != F_UNLCK),1);
 
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          error=my_errno;
 
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        reinit_io_cache(&info->rec_cache,READ_CACHE,0,
 
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                       (pbool) (info->lock_type != F_UNLCK),1);
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      }
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      if (info->lock_type != F_UNLCK && ! info->was_locked)
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      {
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        info->was_locked=info->lock_type;
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        if (mi_lock_database(info,F_UNLCK))
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          error=errno;
 
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          error=my_errno;
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      }
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#ifdef CANT_OPEN_FILES_TWICE
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      if (info->s->kfile >= 0 && internal::my_close(info->s->kfile,MYF(0)))
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        error = errno;
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      if (info->dfile >= 0 && internal::my_close(info->dfile,MYF(0)))
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        error = errno;
 
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      if (info->s->kfile >= 0 && my_close(info->s->kfile,MYF(0)))
 
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        error = my_errno;
 
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      if (info->dfile >= 0 && my_close(info->dfile,MYF(0)))
 
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        error = my_errno;
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      info->s->kfile=info->dfile= -1;   /* Files aren't open anymore */
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      break;
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#endif
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      {                                 /* Open closed files */
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        char name_buff[FN_REFLEN];
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        if (info->s->kfile < 0)
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          if ((info->s->kfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
 
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          if ((info->s->kfile= my_open(fn_format(name_buff,info->filename,"",
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                                              N_NAME_IEXT,4),info->mode,
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                                    MYF(MY_WME))) < 0)
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            error = errno;
 
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            error = my_errno;
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        if (info->dfile < 0)
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        {
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          if ((info->dfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
 
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          if ((info->dfile= my_open(fn_format(name_buff,info->filename,"",
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                                              N_NAME_DEXT,4),info->mode,
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                                    MYF(MY_WME))) < 0)
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            error = errno;
 
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            error = my_errno;
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          info->rec_cache.file=info->dfile;
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        }
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      }
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      if (info->was_locked)
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      {
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        if (mi_lock_database(info, info->was_locked))
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          error=errno;
 
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          error=my_errno;
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        info->was_locked=0;
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      }
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      break;
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    }
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    ++it;
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  }
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  THR_LOCK_myisam.unlock();
 
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  }
 
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  if (flag == HA_PANIC_CLOSE)
 
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  {
 
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    VOID(mi_log(0));                            /* Close log if neaded */
 
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  }
 
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  pthread_mutex_unlock(&THR_LOCK_myisam);
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  if (!error)
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    return(0);
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  return(errno=error);
 
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    DBUG_RETURN(0);
 
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  DBUG_RETURN(my_errno=error);
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} /* mi_panic */