1 /* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23 /* close a isam-database */
24 /*
25 TODO:
26 We need to have a separate mutex on the closed file to allow other threads
27 to open other files during the time we flush the cache and close this file
28 */
29
30 #include "myisamdef.h"
31
mi_close_share(register MI_INFO * info,my_bool * closed_share)32 int mi_close_share(register MI_INFO *info, my_bool *closed_share)
33 {
34 int error=0,flag;
35 MYISAM_SHARE *share=info->s;
36 DBUG_ENTER("mi_close_share");
37 DBUG_PRINT("enter",("base: 0x%lx reopen: %u locks: %u",
38 (long) info, (uint) share->reopen,
39 (uint) share->tot_locks));
40
41 if (info->open_list.data)
42 mysql_mutex_lock(&THR_LOCK_myisam);
43 if (info->lock_type == F_EXTRA_LCK)
44 info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
45
46 if (info->lock_type != F_UNLCK)
47 {
48 if (mi_lock_database(info,F_UNLCK))
49 error=my_errno();
50 }
51 mysql_mutex_lock(&share->intern_lock);
52
53 if (share->options & HA_OPTION_READ_ONLY_DATA)
54 {
55 share->r_locks--;
56 share->tot_locks--;
57 }
58 if (info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED))
59 {
60 if (end_io_cache(&info->rec_cache))
61 error=my_errno();
62 info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED);
63 }
64 flag= !--share->reopen;
65 if (info->open_list.data)
66 myisam_open_list= list_delete(myisam_open_list, &info->open_list);
67 mysql_mutex_unlock(&share->intern_lock);
68
69 my_free(mi_get_rec_buff_ptr(info, info->rec_buff));
70 if (flag)
71 {
72 DBUG_EXECUTE_IF("crash_before_flush_keys",
73 if (share->kfile >= 0) abort(););
74 if (share->kfile >= 0 &&
75 flush_key_blocks(share->key_cache, keycache_thread_var(),
76 share->kfile,
77 share->temporary ? FLUSH_IGNORE_CHANGED :
78 FLUSH_RELEASE))
79 error=my_errno();
80 if (share->kfile >= 0)
81 {
82 /*
83 If we are crashed, we can safely flush the current state as it will
84 not change the crashed state.
85 We can NOT write the state in other cases as other threads
86 may be using the file at this point
87 */
88 if (share->mode != O_RDONLY && mi_is_crashed(info))
89 mi_state_info_write(share->kfile, &share->state, 1);
90 /* Decrement open count must be last I/O on this file. */
91 _mi_decrement_open_count(info);
92 if (mysql_file_close(share->kfile, MYF(0)))
93 error = my_errno();
94 }
95 if (share->file_map)
96 {
97 if (share->options & HA_OPTION_COMPRESS_RECORD)
98 _mi_unmap_file(info);
99 else
100 mi_munmap_file(info);
101 }
102 if (share->decode_trees)
103 {
104 my_free(share->decode_trees);
105 my_free(share->decode_tables);
106 }
107 thr_lock_delete(&share->lock);
108 mysql_mutex_destroy(&share->intern_lock);
109 {
110 int i,keys;
111 keys = share->state.header.keys;
112 mysql_rwlock_destroy(&share->mmap_lock);
113 for(i=0; i<keys; i++) {
114 mysql_rwlock_destroy(&share->key_root_lock[i]);
115 }
116 }
117 my_free(info->s);
118 if (closed_share)
119 *closed_share= TRUE;
120 }
121 if (info->open_list.data)
122 mysql_mutex_unlock(&THR_LOCK_myisam);
123 if (info->ftparser_param)
124 {
125 my_free(info->ftparser_param);
126 info->ftparser_param= 0;
127 }
128 if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
129 error = my_errno();
130
131 myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
132 my_free(info);
133
134 if (error)
135 {
136 set_my_errno(error);
137 DBUG_RETURN(error);
138 }
139 DBUG_RETURN(0);
140 } /* mi_close_share */
141