|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Pageon\Pcntl; |
|
4
|
|
|
|
|
5
|
|
|
/** |
|
6
|
|
|
* This Manager is used to create and wait for forked processes which can be executed in parallel. |
|
7
|
|
|
* It's a wrapper around `ext-pcntl`. |
|
8
|
|
|
* |
|
9
|
|
|
* Class Manager |
|
10
|
|
|
* @package Pageon\Pcntl |
|
11
|
|
|
*/ |
|
12
|
|
|
class Manager |
|
13
|
|
|
{ |
|
14
|
|
|
/** |
|
15
|
|
|
* Create an asynchronous process. |
|
16
|
|
|
* |
|
17
|
|
|
* @param Process $process The process to run asynchronous. |
|
18
|
|
|
* |
|
19
|
|
|
* @return Process The asynchronous process. |
|
20
|
|
|
*/ |
|
21
|
|
|
public function async(Process $process) : Process { |
|
22
|
|
|
$sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP); |
|
23
|
|
|
|
|
24
|
|
|
list($parentSocket, $childSocket) = $sockets; |
|
25
|
|
|
|
|
26
|
|
|
if (($pid = pcntl_fork()) == 0) { |
|
27
|
|
|
fclose($childSocket); |
|
28
|
|
|
$output = serialize($process->execute()); |
|
29
|
|
|
fwrite($parentSocket, $output); |
|
30
|
|
|
fclose($parentSocket); |
|
31
|
|
|
|
|
32
|
|
|
exit; |
|
33
|
|
|
} |
|
34
|
|
|
|
|
35
|
|
|
fclose($parentSocket); |
|
36
|
|
|
|
|
37
|
|
|
$process |
|
38
|
|
|
->setStartTime(time()) |
|
39
|
|
|
->setPid($pid) |
|
40
|
|
|
->setSocket($childSocket); |
|
41
|
|
|
|
|
42
|
|
|
return $process; |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* Wait for a collection of processes to finish. |
|
47
|
|
|
* |
|
48
|
|
|
* @param ProcessCollection $processCollection |
|
49
|
|
|
* |
|
50
|
|
|
* @return array |
|
51
|
|
|
* @throws \Exception |
|
52
|
|
|
*/ |
|
53
|
|
|
public function wait(ProcessCollection $processCollection) { |
|
54
|
|
|
$output = []; |
|
55
|
|
|
$processes = $processCollection->toArray(); |
|
56
|
|
|
|
|
57
|
|
|
do { |
|
58
|
|
|
usleep(100000); |
|
59
|
|
|
|
|
60
|
|
|
/** @var Process $process */ |
|
61
|
|
|
foreach ($processes as $key => $process) { |
|
62
|
|
|
$processStatus = pcntl_waitpid($process->getPid(), $processStatus, WNOHANG | WUNTRACED); |
|
63
|
|
|
|
|
64
|
|
|
$this->handleProcessStatus($processStatus, $process, $processes, $key); |
|
65
|
|
|
} |
|
66
|
|
|
} while (count($processes)); |
|
67
|
|
|
|
|
68
|
|
|
return $output; |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
private function handleProcessStatus($processStatus, Process $process, array &$processes, $key) { |
|
72
|
|
|
switch ($processStatus) { |
|
73
|
|
|
case $process->getPid(): |
|
74
|
|
|
$this->handleProcessSuccess($process); |
|
75
|
|
|
unset($processes[$key]); |
|
76
|
|
|
|
|
77
|
|
|
break; |
|
78
|
|
|
case 0: |
|
79
|
|
|
if ($process->getStartTime() + $process->getMaxRunTime() < time() || pcntl_wifstopped($processStatus)) { |
|
80
|
|
|
$this->handleProcessStop($process); |
|
81
|
|
|
|
|
82
|
|
|
unset($processes[$key]); |
|
83
|
|
|
} |
|
84
|
|
|
|
|
85
|
|
|
break; |
|
86
|
|
|
default: |
|
87
|
|
|
throw new \Exception("Could not reliably manage {$process->getPid()}"); |
|
88
|
|
|
} |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* Handle a successful process. |
|
93
|
|
|
* |
|
94
|
|
|
* @param Process $process |
|
95
|
|
|
*/ |
|
96
|
|
|
private function handleProcessSuccess(Process $process) { |
|
97
|
|
|
$output = ''; |
|
98
|
|
|
while (!feof($process->getSocket())) { |
|
99
|
|
|
$output .= fgets($process->getSocket()); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
fclose($process->getSocket()); |
|
103
|
|
|
|
|
104
|
|
|
if ($success = $process->getSuccess()) { |
|
105
|
|
|
call_user_func_array($success, [unserialize($output), $process]); |
|
106
|
|
|
} |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
/** |
|
110
|
|
|
* Handle a stopped process. |
|
111
|
|
|
* |
|
112
|
|
|
* @param Process $process |
|
113
|
|
|
* |
|
114
|
|
|
* @throws \Exception |
|
115
|
|
|
*/ |
|
116
|
|
|
private function handleProcessStop(Process $process) { |
|
117
|
|
|
if (!posix_kill($process->getPid(), SIGKILL)) { |
|
118
|
|
|
throw new \Exception('Failed to kill ' . $process->getPid() . ': ' . posix_strerror(posix_get_last_error())); |
|
119
|
|
|
} |
|
120
|
|
|
} |
|
121
|
|
|
} |
|
122
|
|
|
|
pageon /
stitcher-core
