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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
*
* Licensed under the Open Software License version 3.0
*
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
* http://opensource.org/licenses/OSL-3.0
* If you did not receive a copy of the license and are unable to obtain it
* through the world wide web, please send an email to
* licensing@ellislab.com so we can send you a copy immediately.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
* @since Version 2.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* CodeIgniter APC Caching Class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Core
* @author EllisLab Dev Team
* @link
*/
class CI_Cache_apc extends CI_Driver {
/**
* Get
*
* Look for a value in the cache. If it exists, return the data
* if not, return FALSE
*
* @param string
* @return mixed value that is stored/FALSE on failure
*/
public function get($id)
{
$success = FALSE;
$data = apc_fetch($id, $success);
if ($success === TRUE)
{
return is_array($data)
? unserialize($data[0])
: $data;
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Cache Save
*
* @param string $id Cache ID
* @param mixed $data Data to store
* @param int $ttol Length of time (in seconds) to cache the data
* @param bool $raw Whether to store the raw value
* @return bool TRUE on success, FALSE on failure
*/
public function save($id, $data, $ttl = 60, $raw = FALSE)
{
$ttl = (int) $ttl;
return apc_store(
$id,
($raw === TRUE ? $data : array(serialize($data), time(), $ttl)),
$ttl
);
}
// ------------------------------------------------------------------------
/**
* Delete from Cache
*
* @param mixed unique identifier of the item in the cache
* @return bool true on success/false on failure
*/
public function delete($id)
{
return apc_delete($id);
}
// ------------------------------------------------------------------------
/**
* Increment a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to add
* @return mixed New value on success or FALSE on failure
*/
public function increment($id, $offset = 1)
{
return apc_inc($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Decrement a raw value
*
* @param string $id Cache ID
* @param int $offset Step/value to reduce by
* @return mixed New value on success or FALSE on failure
*/
public function decrement($id, $offset = 1)
{
return apc_dec($id, $offset);
}
// ------------------------------------------------------------------------
/**
* Clean the cache
*
* @return bool false on failure/true on success
*/
public function clean()
{
return apc_clear_cache('user');
}
// ------------------------------------------------------------------------
/**
* Cache Info
*
* @param string user/filehits
* @return mixed array on success, false on failure
*/
public function cache_info($type = NULL)
{
return apc_cache_info($type);
}
// ------------------------------------------------------------------------
/**
* Get Cache Metadata
*
* @param mixed key to get cache metadata on
* @return mixed array on success/false on failure
*/
public function get_metadata($id)
{
$success = FALSE;
$stored = apc_fetch($id, $success);
if ($success === FALSE OR count($stored) !== 3)
{
return FALSE;
}
list($data, $time, $ttl) = $stored;
return array(
'expire' => $time + $ttl,
'mtime' => $time,
'data' => unserialize($data)
);
}
// ------------------------------------------------------------------------
/**
* is_supported()
*
* Check to see if APC is available on this system, bail if it isn't.
*
* @return bool
*/
public function is_supported()
{
if ( ! extension_loaded('apc') OR ! (bool) @ini_get('apc.enabled'))
{
log_message('debug', 'The APC PHP extension must be loaded to use APC Cache.');
return FALSE;
}
return TRUE;
}
}
/* End of file Cache_apc.php */
/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */
|
