1/*
2 * Copyright (c) 2004, 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
26package jdk.internal.reflect;
27
28import java.lang.reflect.Field;
29import java.lang.reflect.Modifier;
30import jdk.internal.misc.Unsafe;
31
32/**
33 * Base class for jdk.internal.misc.Unsafe-based FieldAccessors for fields with
34 * final or volatile qualifiers. These differ from unqualified
35 * versions in that (1) they check for read-only status (2) they use
36 * the volatile forms of Unsafe get/put methods. (When accessed via
37 * reflection, finals act as slightly "lighter" forms of volatiles. So
38 * the volatile forms are heavier than necessary in terms of
39 * underlying reordering rules and memory barriers, but preserve
40 * correctness.)
41 */
42
43abstract class UnsafeQualifiedFieldAccessorImpl
44    extends UnsafeFieldAccessorImpl
45{
46    protected final boolean isReadOnly;
47
48    UnsafeQualifiedFieldAccessorImpl(Field field, boolean isReadOnly) {
49        super(field);
50        this.isReadOnly = isReadOnly;
51    }
52}
53