/**
* fork process
*
* @return \Ackintosh\Snidel\Fork\Fork
* @throws \RuntimeException
*/
private function fork()
{
$pid = $this->pcntl->fork();
if ($pid === -1) {
throw new \RuntimeException('could not fork a new process');
}
$pid = $pid === 0 ? getmypid() : $pid;
return new Fork($pid);
}
