src/cli/SignalLoop.php
public function canContinue()
    {
        if (extension_loaded('pcntl')) {
            pcntl_signal_dispatch();
            // Wait for resume signal until loop is suspended
            while (self::$pause && !self::$exit) {
                usleep(10000);
                pcntl_signal_dispatch();
            }
        }

        return !self::$exit;
    }
public function canContinue()
    {
        if (extension_loaded('pcntl')) {
            pcntl_signal_dispatch();
            // Wait for resume signal until loop is suspended
            while (self::$pause && !self::$exit) {
                usleep(10000);
                pcntl_signal_dispatch();
            }
        }

        return !self::$exit;
    }
Checks signals state.

@inheritdoc