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/* Copyright (c) 2000, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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 */
/* 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 <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include "my_dbug.h"
#include "my_inttypes.h"
#include "storage/myisam/myisamdef.h"
int mi_close_share(MI_INFO *info, bool *closed_share) {
int error = 0, flag;
MYISAM_SHARE *share = info->s;
DBUG_TRACE;
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) my_abort(););
if (share->kfile >= 0 &&
flush_key_blocks(
share->key_cache, keycache_thread_var(), 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);
/* 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();
}
if (share->file_map) {
if (share->options & HA_OPTION_COMPRESS_RECORD)
_mi_unmap_file(info);
else
mi_munmap_file(info);
}
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 (closed_share) *closed_share = true;
}
if (info->open_list.data) mysql_mutex_unlock(&THR_LOCK_myisam);
if (info->ftparser_param) {
my_free(info->ftparser_param);
info->ftparser_param = nullptr;
}
if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
error = my_errno();
myisam_log_command(MI_LOG_CLOSE, info, nullptr, 0, error);
my_free(info);
if (error) {
set_my_errno(error);
return error;
}
return 0;
} /* mi_close_share */
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