# Check signals for safe operation
# will callback receiver of raised signals
# can callback any instance of SignalHandler, not just this one
fun check_signals: Bool is extern import SignalHandler.receive_signal `{
	int sig;
	int raised_something = 0;

	for (sig = 0; sig < 32; sig ++)
		if (nit_signals_list[sig].raised) {
			nit_signals_list[sig].raised = 0;
			raised_something = 1;
			SignalHandler handler = (SignalHandler)nit_signals_list[sig].handler;
			SignalHandler_receive_signal(handler, sig);
		}

	return raised_something;
`}