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<?php
declare(strict_types=1);
namespace Mautic\CoreBundle\ProcessSignal;
use Mautic\CoreBundle\ProcessSignal\Exception\SignalCaughtException;
class ProcessSignalService
{
public const SIGTERM = 15;
public const SIGINT = 2;
private const SIGNALS = [self::SIGTERM, self::SIGINT];
private ?int $signal = null;
/**
* @param int[] $signals
*/
public function registerSignalHandler(callable $beforeCallback = null, array $signals = self::SIGNALS): void
{
if (!function_exists('pcntl_signal')) {
return;
}
$handler = function (int $signal) use ($beforeCallback): void {
if ($beforeCallback) {
call_user_func($beforeCallback, $signal);
}
$this->signal = $signal;
};
foreach ($signals as $signal) {
pcntl_signal($signal, $handler);
}
}
/**
* @param int[] $signals
*/
public function restoreSignalHandler(array $signals = self::SIGNALS): void
{
if (!function_exists('pcntl_signal')) {
return;
}
foreach ($signals as $signal) {
pcntl_signal($signal, SIG_DFL);
}
}
public function isSignalCaught(): bool
{
if (!function_exists('pcntl_signal_dispatch')) {
return false;
}
pcntl_signal_dispatch();
return null !== $this->signal;
}
/**
* @throws SignalCaughtException
*/
public function throwExceptionIfSignalIsCaught(): void
{
if (!$this->isSignalCaught()) {
return;
}
throw new SignalCaughtException($this->signal);
}
}
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