PPT Slide

public Object read(ObjectInput in)

{

if(!readList.contains(Thread.currentThread()))

throw new IllegalReadException();

return in.readObject();

}

public void write(ObjectOutput out)

{

if(theWriter != Thread.currentThread())

throw new IllegalWriteException();

out.writeObject();

}

private int readers, writers, writersWaiting;

private Vector readList = new Vector();

private Thread theWriter;

}