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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 */
/*
TODO:
We need to have a separate mutex on the closed file to allow other threads
to open other files during the time we flush the cache and close this file
*/
#include "myisamdef.h"
int mi_close(register MI_INFO *info)
{
int error=0,flag;
MYISAM_SHARE *share=info->s;
DBUG_ENTER("mi_close");
DBUG_PRINT("enter",("base: %lx reopen: %u locks: %u",
info,(uint) share->reopen, (uint) share->tot_locks));
pthread_mutex_lock(&THR_LOCK_myisam);
if (info->lock_type == F_EXTRA_LCK)
info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
if (share->reopen == 1 && share->kfile >= 0)
_mi_decrement_open_count(info);
if (info->lock_type != F_UNLCK)
{
if (mi_lock_database(info,F_UNLCK))
error=my_errno;
}
pthread_mutex_lock(&share->intern_lock);
if (share->options & HA_OPTION_READ_ONLY_DATA)
{
share->r_locks--;
share->tot_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;
myisam_open_list=list_delete(myisam_open_list,&info->open_list);
pthread_mutex_unlock(&share->intern_lock);
my_free(mi_get_rec_buff_ptr(info, info->rec_buff), MYF(MY_ALLOW_ZERO_PTR));
if (flag)
{
if (share->kfile >= 0 &&
flush_key_blocks(share->key_cache, share->kfile,
share->temporary ? FLUSH_IGNORE_CHANGED :
FLUSH_RELEASE))
error=my_errno;
if (share->kfile >= 0)
{
/*
If we are crashed, we can safely flush the current state as it will
not change the crashed state.
We can NOT write the state in other cases as other threads
may be using the file at this point
*/
if (share->mode != O_RDONLY && mi_is_crashed(info))
mi_state_info_write(share->kfile, &share->state, 1);
if (my_close(share->kfile,MYF(0)))
error = my_errno;
}
#ifdef HAVE_MMAP
if (share->file_map)
_mi_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));
{
int i,keys;
keys = share->state.header.keys;
for(i=0; i<keys; i++) {
VOID(rwlock_destroy(&share->key_root_lock[i]));
}
}
#endif
my_free((gptr) info->s,MYF(0));
}
pthread_mutex_unlock(&THR_LOCK_myisam);
if (info->dfile >= 0 && my_close(info->dfile,MYF(0)))
error = my_errno;
myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
my_free((gptr) info,MYF(0));
if (error)
{
DBUG_RETURN(my_errno=error);
}
DBUG_RETURN(0);
} /* mi_close */
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