| /* |
| * Copyright (c) 2007, 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 nsk.share.gc.lock; |
| |
| import nsk.share.gc.gp.GarbageProducer; |
| |
| /** |
| * Locker represents a way to lock a resource |
| * which may be critical for GC to work. |
| */ |
| public interface Locker<T> { |
| /** |
| * Enable this locker and make necessary preparations. |
| */ |
| public void enable(); |
| |
| /** |
| * Lock an object. |
| * |
| * There can be multiple calls to this, but to lock |
| * again, one must first unlock. |
| */ |
| public void lock(); |
| |
| /** |
| * Unlock an object. |
| * |
| */ |
| public void unlock(); |
| |
| /** |
| * Get any exceptions that occured. |
| * |
| * @return exception or null if there none |
| */ |
| public Throwable getException(); |
| |
| /** |
| * Disable this locker and make necessary cleanups. |
| */ |
| public void disable(); |
| } |