|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file is part of ninja-mutex. |
|
4
|
|
|
* |
|
5
|
|
|
* (C) Kamil Dziedzic <[email protected]> |
|
6
|
|
|
* |
|
7
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
8
|
|
|
* file that was distributed with this source code. |
|
9
|
|
|
*/ |
|
10
|
|
|
namespace NinjaMutex; |
|
11
|
|
|
|
|
12
|
|
|
use Exception; |
|
13
|
|
|
use NinjaMutex\Lock\LockInterface; |
|
14
|
|
|
|
|
15
|
|
|
/** |
|
16
|
|
|
* Mutex |
|
17
|
|
|
* |
|
18
|
|
|
* @author Kamil Dziedzic <[email protected]> |
|
19
|
|
|
*/ |
|
20
|
|
|
class Mutex |
|
21
|
|
|
{ |
|
22
|
|
|
/** |
|
23
|
|
|
* Lock implementor |
|
24
|
|
|
* |
|
25
|
|
|
* @var LockInterface |
|
26
|
|
|
*/ |
|
27
|
|
|
protected $lockImplementor; |
|
28
|
|
|
|
|
29
|
|
|
/** |
|
30
|
|
|
* Name of lock |
|
31
|
|
|
* |
|
32
|
|
|
* @var string |
|
33
|
|
|
*/ |
|
34
|
|
|
protected $name; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* Lock counter to protect against recursive deadlock |
|
38
|
|
|
* |
|
39
|
|
|
* @var integer |
|
40
|
|
|
*/ |
|
41
|
|
|
protected $counter = 0; |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* @param string $name |
|
45
|
|
|
* @param LockInterface $lockImplementor |
|
46
|
|
|
*/ |
|
47
|
54 |
|
public function __construct($name, LockInterface $lockImplementor) |
|
48
|
|
|
{ |
|
49
|
54 |
|
$this->name = $name; |
|
50
|
54 |
|
$this->lockImplementor = $lockImplementor; |
|
51
|
54 |
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @param int|null $timeout |
|
55
|
|
|
* @return bool |
|
56
|
|
|
*/ |
|
57
|
26 |
|
public function acquireLock($timeout = null) |
|
58
|
|
|
{ |
|
59
|
26 |
|
if ($this->counter > 0 || |
|
60
|
26 |
|
$this->lockImplementor->acquireLock($this->name, $timeout)) { |
|
61
|
26 |
|
$this->counter++; |
|
62
|
|
|
|
|
63
|
26 |
|
return true; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
1 |
|
return false; |
|
67
|
|
|
} |
|
68
|
|
|
|
|
69
|
|
|
/** |
|
70
|
|
|
* @return bool |
|
71
|
|
|
*/ |
|
72
|
26 |
|
public function releaseLock() |
|
73
|
|
|
{ |
|
74
|
26 |
|
if ($this->counter > 0) { |
|
75
|
26 |
|
$this->counter--; |
|
76
|
26 |
|
if ($this->counter > 0 || |
|
77
|
26 |
|
$this->lockImplementor->releaseLock($this->name)) { |
|
78
|
26 |
|
return true; |
|
79
|
|
|
} |
|
80
|
|
|
$this->counter++; |
|
81
|
|
|
} |
|
82
|
|
|
|
|
83
|
|
|
return false; |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
/** |
|
87
|
|
|
* Try to release any obtained locks when object is destroyed |
|
88
|
|
|
* |
|
89
|
|
|
* This is a safe guard for cases when your php script dies unexpectedly. |
|
90
|
|
|
* It's not guaranteed it will work either. |
|
91
|
|
|
* |
|
92
|
|
|
* You should not depend on __destruct() to release your locks, |
|
93
|
|
|
* instead release them with `$released = $this->releaseLock()`A |
|
94
|
|
|
* and check `$released` if lock was properly released |
|
95
|
|
|
*/ |
|
96
|
54 |
|
public function __destruct() |
|
97
|
|
|
{ |
|
98
|
|
|
try { |
|
99
|
54 |
|
if ($this->isAcquired()) { |
|
100
|
12 |
|
$this->releaseLock(); |
|
101
|
12 |
|
} |
|
102
|
54 |
|
} catch (Exception $e) { |
|
|
|
|
|
|
103
|
|
|
} |
|
104
|
54 |
|
} |
|
105
|
|
|
|
|
106
|
|
|
/** |
|
107
|
|
|
* Check if Mutex is acquired |
|
108
|
|
|
* |
|
109
|
|
|
* @return bool |
|
110
|
|
|
*/ |
|
111
|
54 |
|
public function isAcquired() |
|
112
|
|
|
{ |
|
113
|
54 |
|
return $this->counter > 0; |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
|
|
/** |
|
117
|
|
|
* @return bool |
|
118
|
|
|
*/ |
|
119
|
22 |
|
public function isLocked() |
|
120
|
|
|
{ |
|
121
|
22 |
|
return $this->lockImplementor->isLocked($this->name); |
|
122
|
|
|
} |
|
123
|
|
|
} |
|
124
|
|
|
|
arvenil /
ninja-mutex
Loading history...