|
1
|
|
|
<?php |
|
2
|
|
|
/**************************************************************************** |
|
3
|
|
|
* For license information see doc/license.txt |
|
4
|
|
|
* Unicode Reminder メモ |
|
5
|
|
|
* synchronization of processes which must not run concurrently; |
|
6
|
|
|
****************************************************************************/ |
|
7
|
|
|
|
|
8
|
|
|
namespace Oc\Util; |
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* Class ProcessSync |
|
12
|
|
|
*/ |
|
13
|
|
|
class ProcessSync |
|
14
|
|
|
{ |
|
15
|
|
|
/** @var string $pidFilePath */ |
|
16
|
|
|
private $pidFilePath; |
|
17
|
|
|
|
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* ProcessSync constructor. |
|
21
|
|
|
* |
|
22
|
|
|
* @param $name |
|
23
|
|
|
*/ |
|
24
|
|
|
public function __construct($name) |
|
25
|
|
|
{ |
|
26
|
|
|
$this->pidFilePath = __DIR__ . '/../../../cache2/' . $name . '.pid'; |
|
27
|
|
|
} |
|
28
|
|
|
|
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* Enter code section which must not run concurrently |
|
32
|
|
|
* |
|
33
|
|
|
* @return bool |
|
34
|
|
|
*/ |
|
35
|
|
|
public function enter() |
|
36
|
|
|
{ |
|
37
|
|
|
if (!$this->checkDaemon()) { |
|
38
|
|
|
return false; |
|
39
|
|
|
} |
|
40
|
|
|
|
|
41
|
|
|
if ($pidFile = @fopen($this->pidFilePath, 'w')) { |
|
42
|
|
|
fwrite($pidFile, posix_getpid()); |
|
43
|
|
|
fclose($pidFile); |
|
44
|
|
|
|
|
45
|
|
|
return true; |
|
46
|
|
|
} else { |
|
47
|
|
|
echo "can't create PidFile " . $this->pidFilePath . "\n"; |
|
48
|
|
|
|
|
49
|
|
|
return false; |
|
50
|
|
|
} |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* checks if other instance of process is running |
|
55
|
|
|
* |
|
56
|
|
|
* @return bool |
|
57
|
|
|
*/ |
|
58
|
|
|
private function checkDaemon() |
|
59
|
|
|
{ |
|
60
|
|
|
if (file_exists($this->pidFilePath) && $pidFile = @fopen($this->pidFilePath, 'r')) { |
|
61
|
|
|
$pidDaemon = fgets($pidFile, 20); |
|
62
|
|
|
fclose($pidFile); |
|
63
|
|
|
|
|
64
|
|
|
$pidDaemon = (int)$pidDaemon; |
|
65
|
|
|
|
|
66
|
|
|
// bad PID file, e.g. due to system malfunction while creating the file? |
|
67
|
|
|
if ($pidDaemon <= 0) { |
|
68
|
|
|
echo 'removing bad PidFile (' . $this->pidFilePath . ")\n"; |
|
69
|
|
|
unlink($this->pidFilePath); |
|
70
|
|
|
|
|
71
|
|
|
return false; |
|
72
|
|
|
} elseif (posix_kill($pidDaemon, 0)) { // process running? |
|
73
|
|
|
// yes, good bye |
|
74
|
|
|
echo 'Error: process for ' . $this->pidFilePath . " is already running with pid=$pidDaemon\n"; |
|
75
|
|
|
|
|
76
|
|
|
return false; |
|
77
|
|
|
} else { |
|
78
|
|
|
// no, remove pid_file |
|
79
|
|
|
echo 'process not running, removing old PidFile (' . $this->pidFilePath . ")\n"; |
|
80
|
|
|
unlink($this->pidFilePath); |
|
81
|
|
|
|
|
82
|
|
|
return true; |
|
83
|
|
|
} |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
return true; |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* Leave code section which must not run concurrently |
|
92
|
|
|
* |
|
93
|
|
|
* @param bool $message |
|
94
|
|
|
* @return bool |
|
95
|
|
|
*/ |
|
96
|
|
|
public function leave($message = false) |
|
97
|
|
|
{ |
|
98
|
|
|
if ($message) { |
|
99
|
|
|
echo $message . "\n"; |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
if ($pidFile = @fopen($this->pidFilePath, 'r')) { |
|
103
|
|
|
$pid = fgets($pidFile, 20); |
|
104
|
|
|
fclose($pidFile); |
|
105
|
|
|
if ($pid == posix_getpid()) { |
|
106
|
|
|
unlink($this->pidFilePath); |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
return true; |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
echo "Error: can't delete own PidFile (" . $this->pidFilePath . ")\n"; |
|
113
|
|
|
|
|
114
|
|
|
return false; |
|
115
|
|
|
} |
|
116
|
|
|
} |
|
117
|
|
|
|
OpencachingDeutschland /
oc-server3
