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7f6358a8b5
Co-authored-by: Fei Yang <fyang@openjdk.org> Co-authored-by: Thomas Stuefe <stuefe@openjdk.org> Reviewed-by: dcubed, stuefe, shade, dholmes, dlong
60 lines
1.9 KiB
Java
60 lines
1.9 KiB
Java
/*
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* Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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package sun.jvm.hotspot.runtime;
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import sun.jvm.hotspot.types.TypeDataBase;
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/** Encapsulates the LockingMode enum in globalDefinitions.hpp in
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the VM. */
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public class LockingMode {
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private static int monitor;
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private static int legacy;
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private static int lightweight;
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static {
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VM.registerVMInitializedObserver(
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(o, d) -> initialize(VM.getVM().getTypeDataBase()));
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}
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private static synchronized void initialize(TypeDataBase db) {
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monitor = db.lookupIntConstant("LM_MONITOR").intValue();
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legacy = db.lookupIntConstant("LM_LEGACY").intValue();
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lightweight = db.lookupIntConstant("LM_LIGHTWEIGHT").intValue();
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}
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public static int getMonitor() {
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return monitor;
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}
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public static int getLegacy() {
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return legacy;
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}
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public static int getLightweight() {
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return lightweight;
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}
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}
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