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 02110-1301 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 "myisamdef.h"
24
25int 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 if (flag)
64 {
65 DBUG_EXECUTE_IF("crash_before_flush_keys",
66 if (share->kfile >= 0) DBUG_SUICIDE(););
67 if (share->kfile >= 0 &&
68 flush_key_blocks(share->key_cache, share->kfile,
69 &share->dirty_part_map,
70 ((share->temporary || share->deleting) ?
71 FLUSH_IGNORE_CHANGED :
72 FLUSH_RELEASE)))
73 error=my_errno;
74 if (share->kfile >= 0)
75 {
76 /*
77 If we are crashed, we can safely flush the current state as it will
78 not change the crashed state.
79 We can NOT write the state in other cases as other threads
80 may be using the file at this point
81 IF using --external-locking.
82 */
83 if (share->mode != O_RDONLY && mi_is_crashed(info))
84 mi_state_info_write(share->kfile, &share->state, 1);
85 /* Decrement open count must be last I/O on this file. */
86 _mi_decrement_open_count(info);
87 if (mysql_file_close(share->kfile, MYF(0)))
88 error = my_errno;
89 }
90#ifdef HAVE_MMAP
91 if (share->file_map)
92 {
93 if (share->options & HA_OPTION_COMPRESS_RECORD)
94 _mi_unmap_file(info);
95 else
96 mi_munmap_file(info);
97 }
98#endif
99 if (share->decode_trees)
100 {
101 my_free(share->decode_trees);
102 my_free(share->decode_tables);
103 }
104 thr_lock_delete(&share->lock);
105 mysql_mutex_destroy(&share->intern_lock);
106 {
107 int i,keys;
108 keys = share->state.header.keys;
109 mysql_rwlock_destroy(&share->mmap_lock);
110 for(i=0; i<keys; i++) {
111 mysql_rwlock_destroy(&share->key_root_lock[i]);
112 }
113 }
114 my_free(info->s);
115 }
116 if (info->open_list.data)
117 mysql_mutex_unlock(&THR_LOCK_myisam);
118 if (info->ftparser_param)
119 {
120 my_free(info->ftparser_param);
121 info->ftparser_param= 0;
122 }
123 if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
124 error = my_errno;
125
126 myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
127 my_free(info);
128
129 if (error)
130 {
131 DBUG_RETURN(my_errno=error);
132 }
133 DBUG_RETURN(0);
134} /* mi_close */
135