1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* Copyright (C) 2000-2001, 2003 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "myisam_priv.h"
using namespace std;
using namespace drizzled;
/* if flag == HA_PANIC_CLOSE then all misam files are closed */
/* if flag == HA_PANIC_WRITE then all misam files are unlocked and
all changed data in single user misam is written to file */
/* if flag == HA_PANIC_READ then all misam files that was locked when
mi_panic(HA_PANIC_WRITE) was done is locked. A mi_readinfo() is
done for all single user files to get changes in database */
int mi_panic(enum ha_panic_function flag)
{
int error=0;
MI_INFO *info;
pthread_mutex_lock(&THR_LOCK_myisam);
list<MI_INFO *>::iterator it= myisam_open_list.begin();
while (it != myisam_open_list.end())
{
info= *it;
switch (flag) {
case HA_PANIC_CLOSE:
pthread_mutex_unlock(&THR_LOCK_myisam); /* Not exactly right... */
if (mi_close(info))
error=errno;
pthread_mutex_lock(&THR_LOCK_myisam);
break;
case HA_PANIC_WRITE: /* Do this to free databases */
#ifdef CANT_OPEN_FILES_TWICE
if (info->s->options & HA_OPTION_READ_ONLY_DATA)
break;
#endif
if (flush_key_blocks(info->s->key_cache, info->s->kfile, FLUSH_RELEASE))
error=errno;
if (info->opt_flag & WRITE_CACHE_USED)
if (flush_io_cache(&info->rec_cache))
error=errno;
if (info->opt_flag & READ_CACHE_USED)
{
if (flush_io_cache(&info->rec_cache))
error=errno;
reinit_io_cache(&info->rec_cache,internal::READ_CACHE,0,
(bool) (info->lock_type != F_UNLCK),1);
}
if (info->lock_type != F_UNLCK && ! info->was_locked)
{
info->was_locked=info->lock_type;
if (mi_lock_database(info,F_UNLCK))
error=errno;
}
#ifdef CANT_OPEN_FILES_TWICE
if (info->s->kfile >= 0 && internal::my_close(info->s->kfile,MYF(0)))
error = errno;
if (info->dfile >= 0 && internal::my_close(info->dfile,MYF(0)))
error = errno;
info->s->kfile=info->dfile= -1; /* Files aren't open anymore */
break;
#endif
case HA_PANIC_READ: /* Restore to before WRITE */
#ifdef CANT_OPEN_FILES_TWICE
{ /* Open closed files */
char name_buff[FN_REFLEN];
if (info->s->kfile < 0)
if ((info->s->kfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
N_NAME_IEXT,4),info->mode,
MYF(MY_WME))) < 0)
error = errno;
if (info->dfile < 0)
{
if ((info->dfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
N_NAME_DEXT,4),info->mode,
MYF(MY_WME))) < 0)
error = errno;
info->rec_cache.file=info->dfile;
}
}
#endif
if (info->was_locked)
{
if (mi_lock_database(info, info->was_locked))
error=errno;
info->was_locked=0;
}
break;
}
++it;
}
pthread_mutex_unlock(&THR_LOCK_myisam);
if (!error)
return(0);
return(errno=error);
} /* mi_panic */
|