/*
* Copyright (c) 2020, 2020, 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 com.oracle.svm.core.hub;
import org.graalvm.compiler.core.common.NumUtil;
import com.oracle.svm.core.annotate.DuplicatedInNativeCode;
@DuplicatedInNativeCode
public enum ReferenceType {
None(0), // non-reference class
Other(1), // Subclass of Reference, but not a subclass of one of the classes below
Soft(2), // Subclass of SoftReference
Weak(3), // Subclass of WeakReference
Unused(4),
Phantom(5); // Subclass of PhantomReference
private final byte value;
ReferenceType(int value) {
this.value = NumUtil.safeToByte(value);
}
public byte getValue() {
return value;
}
}