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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\SignalRegistry;
final class SignalRegistry
{
private $signalHandlers = [];
public function __construct()
{
if (\function_exists('pcntl_async_signals')) {
pcntl_async_signals(true);
}
}
public function register(int $signal, callable $signalHandler): void
{
if (!isset($this->signalHandlers[$signal])) {
$previousCallback = pcntl_signal_get_handler($signal);
if (\is_callable($previousCallback)) {
$this->signalHandlers[$signal][] = $previousCallback;
}
}
$this->signalHandlers[$signal][] = $signalHandler;
pcntl_signal($signal, [$this, 'handle']);
}
public static function isSupported(): bool
{
if (!\function_exists('pcntl_signal')) {
return false;
}
if (\in_array('pcntl_signal', explode(',', ini_get('disable_functions')))) {
return false;
}
return true;
}
/**
* @internal
*/
public function handle(int $signal): void
{
$count = \count($this->signalHandlers[$signal]);
foreach ($this->signalHandlers[$signal] as $i => $signalHandler) {
$hasNext = $i !== $count - 1;
$signalHandler($signal, $hasNext);
}
}
}