| /* |
| * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package gc.gctests.PhantomReference; |
| |
| import java.lang.ref.ReferenceQueue; |
| import java.util.Date; |
| import java.util.HashMap; |
| |
| /** |
| * Helper class that tracks the original hash code for the |
| * object. |
| */ |
| public final class PhantomHelper { |
| |
| private int originalHashCode; |
| private int hashCounter; |
| |
| /** |
| * Constructor for helper class that tracks the hash code. |
| * |
| * @param originalHashCode Referred objects hash code |
| */ |
| public PhantomHelper(int originalHashCode) { |
| this.originalHashCode = originalHashCode; |
| hashCounter = 1; |
| } |
| |
| /** |
| * Get the referred objects original hash code. |
| * |
| * @return Original referred objects hash code |
| */ |
| public int getOriginalHashCode() { |
| return originalHashCode; |
| } |
| |
| /** |
| * Increase the counter for the number of objects |
| * using this hash code. |
| */ |
| public void increaseHashCounter() { |
| hashCounter++; |
| } |
| |
| /** |
| * Decrease the counter for the number of objects |
| * using this hash code. |
| */ |
| public void decreaseHashCounter() { |
| hashCounter--; |
| } |
| |
| /** |
| * Retreive the hash code counter. |
| * |
| * @return Hash code counter value |
| */ |
| public int getHashCounter() { |
| return hashCounter; |
| } |
| |
| /** |
| * Verify all the hash codes from the objects in the reference |
| * queue against the hash map. |
| * |
| * @param rq Reference queue for the phantom references. |
| * @param hmHelper Hashmap that contains all the hash codes |
| * @param maxWaitTime Maximum time to wait for completion of deref:ing |
| * from the reference queue. |
| * @return True if all hash codes matches |
| */ |
| public static final String checkAllHashCodes(ReferenceQueue rq, |
| HashMap hmHelper, |
| long maxWaitTime) { |
| // Check all the phantom references |
| long startTime = new Date().getTime(); |
| boolean keepRunning = true; |
| |
| while (keepRunning) { |
| try { |
| PRHelper prh = (PRHelper) rq.remove(1000); |
| |
| if (prh != null) { |
| Integer ik = new Integer(prh.getReferentHashCode()); |
| PhantomHelper ph = (PhantomHelper) hmHelper.get(ik); |
| |
| if (ph != null) { |
| if (ph.getOriginalHashCode() |
| == prh.getReferentHashCode()) { |
| ph.decreaseHashCounter(); |
| if (ph.getHashCounter() == 0) { |
| hmHelper.remove( |
| new Integer(prh.getReferentHashCode())); |
| } else { |
| hmHelper.put(ik, ph); |
| } |
| prh.clear(); |
| } |
| } else { |
| return "Unmapped hash code detected. The test is faulty."; |
| } |
| |
| prh = null; |
| } |
| } catch (InterruptedException e) { |
| ; // Checkstyle wants at least one line here... |
| } |
| |
| if (new Date().getTime() - startTime > maxWaitTime) { |
| return "All phantom references weren't processed " |
| + "in the configured max time (" |
| + (maxWaitTime / 1000) + " secs)"; |
| } |
| |
| if (hmHelper.size() == 0) { |
| keepRunning = false; |
| } |
| } |
| |
| return null; |
| } |
| } |