001/*
002 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.java;
024
025import com.oracle.graal.compiler.common.type.*;
026import com.oracle.graal.graph.*;
027import com.oracle.graal.nodeinfo.*;
028import com.oracle.graal.nodes.*;
029import com.oracle.graal.nodes.spi.*;
030
031/**
032 * This node describes one locking scope; it ties the monitor enter, monitor exit and the frame
033 * states together. It is thus referenced from the {@link MonitorEnterNode}, from the
034 * {@link MonitorExitNode} and from the {@link FrameState}.
035 */
036@NodeInfo(allowedUsageTypes = {InputType.Association})
037public class MonitorIdNode extends ValueNode implements IterableNodeType, LIRLowerable {
038
039    public static final NodeClass<MonitorIdNode> TYPE = NodeClass.create(MonitorIdNode.class);
040    protected int lockDepth;
041
042    public MonitorIdNode(int lockDepth) {
043        this(TYPE, lockDepth);
044    }
045
046    protected MonitorIdNode(NodeClass<? extends MonitorIdNode> c, int lockDepth) {
047        super(c, StampFactory.forVoid());
048        this.lockDepth = lockDepth;
049    }
050
051    public int getLockDepth() {
052        return lockDepth;
053    }
054
055    public void setLockDepth(int lockDepth) {
056        this.lockDepth = lockDepth;
057    }
058
059    public void generate(NodeLIRBuilderTool generator) {
060        // nothing to do
061    }
062}