void CoWork::Finish() {
	if(!pool) return;
	Pool& p = *pool;
	p.lock.Enter();
	while(todo) {
		LLOG("Finish: todo: " << todo << " (CoWork " << FormatIntHex(this) << ")");
		if(todo == 0)
			break;
		if(p.scheduled)
			Pool::DoJob();
		else {
			p.lock.Leave();
			LLOG("WaitForFinish (CoWork " << FormatIntHex(this) << ")");
			waitforfinish.Wait(); // <---- Infinite wait here!
			p.lock.Enter();
		}
	}
	p.lock.Leave();
	LLOG("CoWork " << FormatIntHex(this) << " finished");
}