/* From sun Java tutorial,
   allows locked access to a shared var, no race conditions */ 
import java.awt.*;
import java.applet.*;
import langevinSimResult;

public class cubbyHole {
    private langevinSimResult contents;
    private boolean available = false;
   
    //constructor
     public cubbyHole (langevinSimResult con) {
	  contents = con;
	}

  
    public synchronized langevinSimResult peek() {
        //allows returns a value
        //useful if we want to only block py until some thing
        //(i.e. get or peek) has returned value.
        available = false;
        notifyAll();
        return contents;
    }

    public synchronized langevinSimResult get() {
        while (available == false) {
            try {
                wait();
            } catch (InterruptedException e) { }
        }
        available = false;
        notifyAll();
        return contents;

    }

    public synchronized void put(langevinSimResult value) {
        while (available == true) {
            try {
                wait();
            } catch (InterruptedException e) { }
        }
        contents = value;
        available = true;
        notifyAll();
    }
}