// This example is from the book _Java Threads_ by Scott Oaks and Henry Wong. 
// Written by Scott Oaks and Henry Wong.
// Copyright (c) 1997 O'Reilly & Associates.
// You may study, use, modify, and distribute this example for any purpose.
// This example is provided WITHOUT WARRANTY either expressed or implied.

// Sample ShareMemory -- Chapter 5, p. 89.

public class ShareMemory extends BusyFlag {
    byte memory[];
    public ShareMemory (int size) {
        memory = new byte[size];
    }

    public synchronized byte[] attach() {
        getBusyFlag();
        return memory;
    }

    public synchronized void detach() {
        freeBusyFlag();
    }
}