package edu.lsu.cct.MCSMPGC;

public class Reference {

	int to;
	int which;
	boolean phantom;
	Object lock = new Object();
	boolean phantom_self;
	public Reference(int to, int which){
		this.to = to;
		this.which = which;
		this.phantom = false;
		this.phantom_self=false;
	}
	public void phantomize(){
		synchronized(lock){
		phantom = true;
		}
		Node n = Main.memory.allocated.get(to);
		if(which==n.which){
			n.decSRC();
			n.incPhantom();
		}
		else{
			n.decWRC();
			n.incPhantom();
		}
	}
	public void unphantomize(){
		synchronized(lock){
			phantom = false;
			phantom_self = false;
		}
	}
	public void phantomizeSelf(){
		synchronized(lock){
		phantom_self = true;
		}
		Node n = Main.memory.allocated.get(to);
		if(which==n.which){
			n.decSRC();
			n.incPhantom_self();
		}
		else{
			n.decWRC();
			n.incPhantom_self();
		}
	}
	public void delete(){
		synchronized(lock){
			Node n = Main.memory.allocated.get(to);
			if(phantom==true){
				n.decPhantom();
			}
		}
	}
	public void deletePS(){
		Node n = Main.memory.allocated.get(to);
		n.decPhantom_self();
	}
	public boolean isPhantomized(){
		synchronized(lock){
		return phantom;
		}
	}
	public boolean isSelfPhantomized(){
		synchronized(lock){
			return phantom_self;
		}
	}
	public String type(){
		Node n = Main.memory.allocated.get(to);
		if(which==n.which){
			return "SG";
		}
		else{
			return "WK";
		}
	}
}