MonitorIdNode.java revision 12657:6ef01bd40ce2 
1/*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.nodes.java;
24
25import static org.graalvm.compiler.nodeinfo.InputType.Association;
26import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
27import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
28
29import org.graalvm.compiler.core.common.type.StampFactory;
30import org.graalvm.compiler.graph.IterableNodeType;
31import org.graalvm.compiler.graph.NodeClass;
32import org.graalvm.compiler.nodeinfo.NodeInfo;
33import org.graalvm.compiler.nodes.FrameState;
34import org.graalvm.compiler.nodes.ValueNode;
35import org.graalvm.compiler.nodes.spi.LIRLowerable;
36import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
37
38/**
39 * This node describes one locking scope; it ties the monitor enter, monitor exit and the frame
40 * states together. It is thus referenced from the {@link MonitorEnterNode}, from the
41 * {@link MonitorExitNode} and from the {@link FrameState}.
42 */
43@NodeInfo(allowedUsageTypes = Association, cycles = CYCLES_0, size = SIZE_0)
44public class MonitorIdNode extends ValueNode implements IterableNodeType, LIRLowerable {
45
46    public static final NodeClass<MonitorIdNode> TYPE = NodeClass.create(MonitorIdNode.class);
47    protected int lockDepth;
48
49    public MonitorIdNode(int lockDepth) {
50        this(TYPE, lockDepth);
51    }
52
53    protected MonitorIdNode(NodeClass<? extends MonitorIdNode> c, int lockDepth) {
54        super(c, StampFactory.forVoid());
55        this.lockDepth = lockDepth;
56    }
57
58    public int getLockDepth() {
59        return lockDepth;
60    }
61
62    public void setLockDepth(int lockDepth) {
63        this.lockDepth = lockDepth;
64    }
65
66    @Override
67    public void generate(NodeLIRBuilderTool generator) {
68        // nothing to do
69    }
70}
71