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comparison graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/AccessMonitor.java @ 2872:0341b6424579

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Project renaming.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:42:25 +0200
parents graal/GraalCompiler/src/com/sun/c1x/ir/AccessMonitor.java@569228710be8
children
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2871:d704eb526603 2872:0341b6424579
1 /*
2 * Copyright (c) 2009, 2011, 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 */
23 package com.sun.c1x.ir;
24
25 import com.oracle.graal.graph.*;
26 import com.sun.cri.ci.*;
27
28 /**
29 * The {@code AccessMonitor} instruction is the base class of both monitor acquisition and release.
30 */
31 public abstract class AccessMonitor extends StateSplit {
32
33 private static final int INPUT_COUNT = 2;
34 private static final int INPUT_OBJECT = 0;
35 private static final int INPUT_LOCK_ADDRESS = 1;
36
37 private static final int SUCCESSOR_COUNT = 0;
38
39 @Override
40 protected int inputCount() {
41 return super.inputCount() + INPUT_COUNT;
42 }
43
44 @Override
45 protected int successorCount() {
46 return super.successorCount() + SUCCESSOR_COUNT;
47 }
48
49 /**
50 * The instruction producing the object locked or unlocked by this instruction.
51 */
52 public Value object() {
53 return (Value) inputs().get(super.inputCount() + INPUT_OBJECT);
54 }
55
56 public Value setObject(Value n) {
57 return (Value) inputs().set(super.inputCount() + INPUT_OBJECT, n);
58 }
59
60 /**
61 * The instruction producing the address of the lock object.
62 */
63 public Value lockAddress() {
64 return (Value) inputs().get(super.inputCount() + INPUT_LOCK_ADDRESS);
65 }
66
67 public Value setLockAddress(Value n) {
68 return (Value) inputs().set(super.inputCount() + INPUT_LOCK_ADDRESS, n);
69 }
70
71 /**
72 * The lock number of this monitor access.
73 */
74 public final int lockNumber;
75
76 /**
77 * Creates a new AccessMonitor instruction.
78 *
79 * @param object the instruction producing the object
80 * @param lockAddress the address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack
81 * @param stateBefore the state before executing the monitor operation
82 * @param lockNumber the number of the lock being acquired
83 * @param inputCount
84 * @param successorCount
85 * @param graph
86 */
87 public AccessMonitor(Value object, Value lockAddress, int lockNumber, int inputCount, int successorCount, Graph graph) {
88 super(CiKind.Illegal, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
89 this.lockNumber = lockNumber;
90 setObject(object);
91 setLockAddress(lockAddress);
92 }
93 }