Mercurial > hg > graal-compiler
view graal/GraalCompiler/src/com/sun/c1x/ir/AccessMonitor.java @ 2585:3e0e65161345
new node layout: Op2
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Thu, 05 May 2011 14:12:19 +0200 |
parents | 16b9a8b5ad39 |
children | 1c36b17f7ee0 |
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/* * Copyright (c) 2009, 2011, 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. * * 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.sun.c1x.ir; import com.sun.c1x.value.*; import com.sun.cri.ci.*; /** * The {@code AccessMonitor} instruction is the base class of both monitor acquisition and release. * * @author Ben L. Titzer */ public abstract class AccessMonitor extends StateSplit { /** * The object locked or unlocked by this instruction. */ private Value object; /** * The address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack. */ private Value lockAddress; /** * The lock number of this monitor access. */ public final int lockNumber; /** * Creates a new AccessMonitor instruction. * * @param object the instruction producing the object * @param lockAddress the address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack * @param stateBefore the state before executing the monitor operation * @param lockNumber the number of the lock being acquired */ public AccessMonitor(Value object, Value lockAddress, FrameState stateBefore, int lockNumber) { super(CiKind.Illegal, stateBefore); this.object = object; this.lockAddress = lockAddress; this.lockNumber = lockNumber; } /** * Gets the instruction producing the object locked or unlocked by this instruction. */ public Value object() { return object; } /** * Gets the instruction producing the address of the lock object. */ public Value lockAddress() { return lockAddress; } @Override public void inputValuesDo(ValueClosure closure) { object = closure.apply(object); if (lockAddress != null) { lockAddress = closure.apply(lockAddress); } } }