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<?php |
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/** |
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* Process Library |
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* @author Tao <[email protected]> |
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*/ |
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namespace Slince\Process; |
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use Slince\Process\Exception\InvalidArgumentException; |
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class SignalHandler |
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{ |
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/** |
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* @var SignalHandler |
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*/ |
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protected static $instance; |
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/** |
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* The handlers |
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* @var array |
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*/ |
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protected $handlers = []; |
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public function __construct() |
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{ |
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if (function_exists('pcntl_async_signals')) { |
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pcntl_async_signals(true); |
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} |
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} |
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/** |
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* Registers a callback for some signals |
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* @param int|array $signals a signal or an array of signals |
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* @param callable|int $handler |
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* @return SignalHandler |
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*/ |
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public function register($signals, $handler) |
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{ |
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if (!is_array($signals)) { |
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$signals = [$signals]; |
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} |
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foreach ($signals as $signal) { |
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$this->setSignalHandler($signal, $handler); |
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} |
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return $this; |
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} |
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/** |
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* Register a callback for |
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* @param $signal |
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* @param int|callable $handler |
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*/ |
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protected function setSignalHandler($signal, $handler) |
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{ |
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if (!is_int($handler) && !is_callable($handler)) { |
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throw new InvalidArgumentException('The signal handler should be called or a number'); |
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} |
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$this->handlers[$signal] = $handler; |
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pcntl_signal($signal, $handler); |
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} |
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/** |
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* Gets the handler for a signal |
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* @param $signal |
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* @return int|string |
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*/ |
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public function getHandler($signal) |
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{ |
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if (function_exists('pcntl_signal_get_handler')) { |
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return pcntl_signal_get_handler($signal); |
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} |
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return isset($this->handlers[$signal]) ? $this->handlers[$signal] : null; |
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} |
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/** |
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* Gets a handler |
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* @return SignalHandler |
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*/ |
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public static function getInstance() |
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{ |
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if (is_null(static::$instance)) { |
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static::$instance = new static(); |
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} |
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return static::$instance; |
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} |
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} |
slince /
process
