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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 */
/* close a isam-database */
#include "isamdef.h"
int nisam_close(register N_INFO *info)
{
int error=0,flag;
ISAM_SHARE *share=info->s;
DBUG_ENTER("nisam_close");
DBUG_PRINT("enter",("base: %lx reopen: %u locks: %u",
info,(uint) share->reopen,
(uint) (share->w_locks+share->r_locks)));
pthread_mutex_lock(&THR_LOCK_isam);
if (info->lock_type == F_EXTRA_LCK)
info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
#ifndef NO_LOCKING
if (info->lock_type != F_UNLCK)
VOID(nisam_lock_database(info,F_UNLCK));
#else
info->lock_type=F_UNLCK;
share->w_locks--;
if (_nisam_writeinfo(info,test(share->changed)))
error=my_errno;
#endif
pthread_mutex_lock(&share->intern_lock);
if (share->base.options & HA_OPTION_READ_ONLY_DATA)
share->r_locks--;
if (info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED))
{
if (end_io_cache(&info->rec_cache))
error=my_errno;
info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED);
}
flag= !--share->reopen;
nisam_open_list=list_delete(nisam_open_list,&info->open_list);
pthread_mutex_unlock(&share->intern_lock);
if (flag)
{
if (share->kfile >= 0 && flush_key_blocks(share->kfile,FLUSH_RELEASE))
error=my_errno;
if (share->kfile >= 0 && my_close(share->kfile,MYF(0)))
error = my_errno;
#ifdef HAVE_MMAP
_nisam_unmap_file(info);
#endif
if (share->decode_trees)
{
my_free((gptr) share->decode_trees,MYF(0));
my_free((gptr) share->decode_tables,MYF(0));
}
#ifdef THREAD
thr_lock_delete(&share->lock);
VOID(pthread_mutex_destroy(&share->intern_lock));
#endif
my_free((gptr) info->s,MYF(0));
}
pthread_mutex_unlock(&THR_LOCK_isam);
if (info->dfile >= 0 && my_close(info->dfile,MYF(0)))
error = my_errno;
nisam_log_command(LOG_CLOSE,info,NULL,0,error);
my_free((gptr) info->rec_alloc,MYF(0));
my_free((gptr) info,MYF(0));
if (error)
{
my_errno=error;
DBUG_RETURN(-1);
}
DBUG_RETURN(0);
} /* nisam_close */
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