1 /* Copyright (c) 2000, 2011, 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 as published by
5 the Free Software Foundation; version 2 of the License.
6
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 GNU General Public License for more details.
11
12 You should have received a copy of the GNU General Public License
13 along with this program; if not, write to the Free Software
14 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
15
16 /* close a isam-database */
17 /*
18 TODO:
19 We need to have a separate mutex on the closed file to allow other threads
20 to open other files during the time we flush the cache and close this file
21 */
22
23 #include "ftdefs.h"
24
mi_close(register MI_INFO * info)25 int mi_close(register MI_INFO *info)
26 {
27 int error=0,flag;
28 MYISAM_SHARE *share=info->s;
29 DBUG_ENTER("mi_close");
30 DBUG_PRINT("enter",("base: %p reopen: %u locks: %u",
31 info, (uint) share->reopen,
32 (uint) share->tot_locks));
33
34 if (info->open_list.data)
35 mysql_mutex_lock(&THR_LOCK_myisam);
36 if (info->lock_type == F_EXTRA_LCK)
37 info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
38
39 if (info->lock_type != F_UNLCK)
40 {
41 if (mi_lock_database(info,F_UNLCK))
42 error=my_errno;
43 }
44 mysql_mutex_lock(&share->intern_lock);
45
46 if (share->options & HA_OPTION_READ_ONLY_DATA)
47 {
48 share->r_locks--;
49 share->tot_locks--;
50 }
51 if (info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED))
52 {
53 if (end_io_cache(&info->rec_cache))
54 error=my_errno;
55 info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED);
56 }
57 flag= !--share->reopen;
58 if (info->open_list.data)
59 myisam_open_list= list_delete(myisam_open_list, &info->open_list);
60 mysql_mutex_unlock(&share->intern_lock);
61
62 my_free(mi_get_rec_buff_ptr(info, info->rec_buff));
63 ftparser_call_deinitializer(info);
64
65 if (flag)
66 {
67 DBUG_EXECUTE_IF("crash_before_flush_keys",
68 if (share->kfile >= 0) DBUG_SUICIDE(););
69 if (share->kfile >= 0 &&
70 flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map,
71 share->deleting ? FLUSH_IGNORE_CHANGED : FLUSH_RELEASE))
72 error=my_errno;
73 if (share->kfile >= 0)
74 {
75 /*
76 If we are crashed, we can safely flush the current state as it will
77 not change the crashed state.
78 We can NOT write the state in other cases as other threads
79 may be using the file at this point IF using --external-locking.
80
81 Also, write the state if a temporary table is not being dropped
82 (the server might want to reopen it, and mi_lock_database() only
83 writes the state for non-temp ones)
84 */
85 if (share->mode != O_RDONLY &&
86 (mi_is_crashed(info) || (share->temporary && !share->deleting)))
87 mi_state_info_write(share->kfile, &share->state, 1);
88 /* Decrement open count must be last I/O on this file. */
89 _mi_decrement_open_count(info);
90 if (mysql_file_close(share->kfile, MYF(0)))
91 error = my_errno;
92 }
93 #ifdef HAVE_MMAP
94 if (share->file_map)
95 {
96 if (share->options & HA_OPTION_COMPRESS_RECORD)
97 _mi_unmap_file(info);
98 else
99 mi_munmap_file(info);
100 }
101 #endif
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 }
119 if (info->open_list.data)
120 mysql_mutex_unlock(&THR_LOCK_myisam);
121 if (info->ftparser_param)
122 {
123 my_free(info->ftparser_param);
124 info->ftparser_param= 0;
125 }
126 if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
127 error = my_errno;
128
129 myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
130 my_free(info);
131
132 if (error)
133 {
134 DBUG_RETURN(my_errno=error);
135 }
136 DBUG_RETURN(0);
137 } /* mi_close */
138