import java.util.*;

public class BusyWait implements Runnable {

  protected MyLock lock;
  
  BusyWait(MyLock l) {
    lock = l;
  }
  
  public static void main(String args[]) {
    MyLock sharedLock = new MyLock();
    new Thread(new BusyWait(sharedLock)).start();
    new Thread(new BusyWait(sharedLock)).start();
  }
  
  public void run() {
    try {
      while(lock.isLocked() == true) {
        Thread.sleep(300);
        System.out.println(Thread.currentThread().getName()+" awaites locked for the lock.");
      }
      // Uncomment the following line and see threads running concurrently.
      // Thread.sleep(10);
      lock.lock();   
      for(int i=0; i<10; i++) {
        Thread.sleep(100);
        System.out.println(Thread.currentThread().getName()+" iteration: "+i);
      }
      lock.unlock();
      System.out.println("Exiting!");
    }
    catch(InterruptedException ex) {
      ex.printStackTrace();
    }
  }
}