src/Handler.php
public function handle($signal) {
			if (isset($this->_bySignal[$signal])) {
				/** @var Listener $reg */
				foreach ($this->_bySignal[$signal] as $reg) {
					$reg->interrupt = $signal;
				}
			} else {
				return SIG_DFL;
			}
		}
public function handle($signal) {
			if (isset($this->_bySignal[$signal])) {
				/** @var Listener $reg */
				foreach ($this->_bySignal[$signal] as $reg) {
					$reg->interrupt = $signal;
				}
			} else {
				return SIG_DFL;
			}
		}
Signal handler for all registrations.

@param $signal
@return int