public class Monitor {

	private boolean locked;

	public Monitor() {
		this.locked = true;
	}

	public void lock() {
		this.locked = true;
	}

	public void unlock() {
		this.locked = false;
	}

	public boolean isLocked() {
		return this.locked;
	}

	public void unlockAndNotify() {
		this.unlock();
		this.notify();
	}
	
	public void timedWait(int timeout) throws InterruptedException {
		
		long abortTime = Timing.currentTime() + timeout;
		
		while (isLocked() && Timing.currentTime() < abortTime)
			wait(abortTime - Timing.currentTime());
	}
	
	public void untimedWait() throws InterruptedException {
		
		while (isLocked())
			wait();
	}
}