53 lines
2.1 KiB
Java
53 lines
2.1 KiB
Java
/*
|
|
* Copyright (c) 2004, 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. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* 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 jdk.internal.reflect;
|
|
|
|
import java.lang.reflect.Field;
|
|
import java.lang.reflect.Modifier;
|
|
import jdk.internal.misc.Unsafe;
|
|
|
|
/**
|
|
* Base class for jdk.internal.misc.Unsafe-based FieldAccessors for fields with
|
|
* final or volatile qualifiers. These differ from unqualified
|
|
* versions in that (1) they check for read-only status (2) they use
|
|
* the volatile forms of Unsafe get/put methods. (When accessed via
|
|
* reflection, finals act as slightly "lighter" forms of volatiles. So
|
|
* the volatile forms are heavier than necessary in terms of
|
|
* underlying reordering rules and memory barriers, but preserve
|
|
* correctness.)
|
|
*/
|
|
|
|
abstract class UnsafeQualifiedFieldAccessorImpl
|
|
extends UnsafeFieldAccessorImpl
|
|
{
|
|
protected final boolean isReadOnly;
|
|
|
|
UnsafeQualifiedFieldAccessorImpl(Field field, boolean isReadOnly) {
|
|
super(field);
|
|
this.isReadOnly = isReadOnly;
|
|
}
|
|
}
|