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- /*
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
- class CubbyHole {
- private int seq; // this is the condition variable.
- private boolean available = false;
-
- public synchronized int get() {
- while (available == false) {
- try {
- wait();
- } catch (InterruptedException e) {
- }
- }
- available = false;
- notify();
- return seq;
- }
-
- public synchronized void put(int value) {
- while (available == true) {
- try {
- wait();
- } catch (InterruptedException e) {
- }
- }
- seq = value;
- available = true;
- notify();
- }
- }
-