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<?php
/**
* @link https://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license https://www.yiiframework.com/license/
*/
namespace yii\queue\cli;
/**
* Process Signal Helper.
*
* @deprecated since 2.0.2 and will be removed in 3.0. Use SignalLoop instead.
*
* @author Roman Zhuravlev <zhuravljov@gmail.com>
*/
class Signal
{
private static $exit = false;
/**
* Checks exit signals
* Used mainly by [[yii\queue\Queue]] to check, whether job execution
* loop can be continued.
* @return bool
*/
public static function isExit()
{
if (function_exists('pcntl_signal')) {
// Installs a signal handler
static $handled = false;
if (!$handled) {
foreach ([SIGTERM, SIGINT, SIGHUP] as $signal) {
pcntl_signal($signal, function () {
static::setExitFlag();
});
}
$handled = true;
}
// Checks signal
if (!static::$exit) {
pcntl_signal_dispatch();
}
}
return static::$exit;
}
/**
* Sets exit flag to `true`
* Method can be used to simulate exit signal for methods that use
* [[isExit()]] to check whether execution loop can be continued.
*/
public static function setExitFlag()
{
static::$exit = true;
}
}
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