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
|
/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* Open a temporary file and cache it with io_cache. Delete it on close */
#include "my_global.h"
#include "mysys_priv.h"
#include "mysql/psi/mysql_file.h"
#include "my_sys.h"
#include <m_string.h>
#include "my_static.h"
#include "mysys_err.h"
/*
Remove an open tempfile so that it doesn't survive
if we crash.
*/
static my_bool cache_remove_open_tmp(IO_CACHE *cache MY_ATTRIBUTE((unused)),
const char *name)
{
#if O_TEMPORARY == 0
/* The following should always succeed */
(void) my_delete(name,MYF(MY_WME));
#endif /* O_TEMPORARY == 0 */
return 0;
}
/*
** Open tempfile cached by IO_CACHE
** Should be used when no seeks are done (only reinit_io_buff)
** Return 0 if cache is inited ok
** The actual file is created when the IO_CACHE buffer gets filled
** If dir is not given, use TMPDIR.
*/
my_bool open_cached_file(IO_CACHE *cache, const char* dir, const char *prefix,
size_t cache_size, myf cache_myflags)
{
DBUG_ENTER("open_cached_file");
cache->dir= dir ? my_strdup(key_memory_IO_CACHE,
dir,MYF(cache_myflags & MY_WME)) : (char*) 0;
cache->prefix= (prefix ? my_strdup(key_memory_IO_CACHE,
prefix,MYF(cache_myflags & MY_WME)) :
(char*) 0);
cache->file_name=0;
cache->buffer=0; /* Mark that not open */
if (!init_io_cache(cache,-1,cache_size,WRITE_CACHE,0L,0,
MYF(cache_myflags | MY_NABP)))
{
DBUG_RETURN(0);
}
my_free(cache->dir);
my_free(cache->prefix);
DBUG_RETURN(1);
}
/* Create the temporary file */
my_bool real_open_cached_file(IO_CACHE *cache)
{
char name_buff[FN_REFLEN];
int error=1;
DBUG_ENTER("real_open_cached_file");
if ((cache->file= mysql_file_create_temp(cache->file_key, name_buff,
cache->dir, cache->prefix,
(O_RDWR | O_BINARY | O_TRUNC | O_TEMPORARY | O_SHORT_LIVED),
MYF(MY_WME))) >= 0)
{
error=0;
cache_remove_open_tmp(cache, name_buff);
}
DBUG_RETURN(error);
}
void close_cached_file(IO_CACHE *cache)
{
DBUG_ENTER("close_cached_file");
if (my_b_inited(cache))
{
File file=cache->file;
cache->file= -1; /* Don't flush data */
(void) end_io_cache(cache);
if (file >= 0)
{
(void) mysql_file_close(file, MYF(0));
}
my_free(cache->dir);
my_free(cache->prefix);
}
DBUG_VOID_RETURN;
}
|
