1 /*
 2  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package jdk.internal.access;
27 
28 import java.lang.ref.ReferenceQueue;
29 
30 public interface JavaLangRefAccess {
31 
32     /**
33      * Wait for progress in {@link java.lang.ref.Reference}
34      * processing.  If there aren't any pending {@link
35      * java.lang.ref.Reference}s, return immediately.
36      *
37      * @return {@code true} if there were any pending
38      * {@link java.lang.ref.Reference}s, {@code false} otherwise.
39      */
40     boolean waitForReferenceProcessing() throws InterruptedException;
41 
42     /**
43      * Runs the finalization methods of any objects pending finalization.
44      *
45      * Invoked by Runtime.runFinalization()
46      */
47     void runFinalization();
48 
49     /**
50      * Constructs a new NativeReferenceQueue.
51      *
52      * Invoked by MethodType.ConcurrentWeakInternSet
53      */
54     <T> ReferenceQueue<T> newNativeReferenceQueue();
55 }