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/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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 02110-1335 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: %p reopen: %u locks: %u",
info, (uint) share->reopen,
(uint) share->tot_locks));
if (info->open_list.data)
mysql_mutex_lock(&THR_LOCK_myisam);
if (info->lock_type == F_EXTRA_LCK)
info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
if (info->lock_type != F_UNLCK)
{
if (mi_lock_database(info,F_UNLCK))
error=my_errno;
}
mysql_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;
if (info->open_list.data)
myisam_open_list= list_delete(myisam_open_list, &info->open_list);
mysql_mutex_unlock(&share->intern_lock);
my_free(mi_get_rec_buff_ptr(info, info->rec_buff));
if (flag)
{
DBUG_EXECUTE_IF("crash_before_flush_keys",
if (share->kfile >= 0) DBUG_ABORT(););
if (share->kfile >= 0 &&
flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map,
share->deleting ? 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 using --external-locking.
Also, write the state if a temporary table is not being dropped
(the server might want to reopen it, and mi_lock_database() only
writes the state for non-temp ones)
*/
if (share->mode != O_RDONLY &&
(mi_is_crashed(info) || (share->temporary && !share->deleting)))
mi_state_info_write(share->kfile, &share->state, 1);
/* Decrement open count must be last I/O on this file. */
_mi_decrement_open_count(info);
if (mysql_file_close(share->kfile, MYF(0)))
error = my_errno;
}
#ifdef HAVE_MMAP
if (share->file_map)
{
if (share->options & HA_OPTION_COMPRESS_RECORD)
_mi_unmap_file(info);
else
mi_munmap_file(info);
}
#endif
if (share->decode_trees)
{
my_free(share->decode_trees);
my_free(share->decode_tables);
}
thr_lock_delete(&share->lock);
mysql_mutex_destroy(&share->intern_lock);
{
int i,keys;
keys = share->state.header.keys;
mysql_rwlock_destroy(&share->mmap_lock);
for(i=0; i<keys; i++) {
mysql_rwlock_destroy(&share->key_root_lock[i]);
}
}
my_free(info->s);
}
if (info->open_list.data)
mysql_mutex_unlock(&THR_LOCK_myisam);
if (info->ftparser_param)
{
my_free(info->ftparser_param);
info->ftparser_param= 0;
}
if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
error = my_errno;
myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
my_free(info);
if (error)
{
DBUG_RETURN(my_errno=error);
}
DBUG_RETURN(0);
} /* mi_close */
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