Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/vm/AtomicData.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package gov.nasa.jpf.vm;
19
20 import gov.nasa.jpf.util.HashData;
21
22
23 /**
24 * helper object to store per thread information about atomic line
25 * execution
26 * <2do> check if we can't do this less expensive. atomic-lines is not
27 * the default anymore
28 */
29 public class AtomicData {
30 /**
31 * The method in which the line step started.
32 */
33 public MethodInfo currentMethod;
34
35 /**
36 * The line at which the line step started.
37 */
38 public int line;
39
40 /**
41 * Set to true if we still are in the same method in which we were
42 * when the line step started.
43 */
44 public boolean inSameMethod;
45
46 @Override
47 public Object clone () {
48 AtomicData a = new AtomicData();
49
50 a.currentMethod = currentMethod;
51 a.line = line;
52 a.inSameMethod = inSameMethod;
53
54 return a;
55 }
56
57 @Override
58 public boolean equals (Object o) {
59 if (o == null) {
60 return false;
61 }
62
63 if (!(o instanceof AtomicData)) {
64 return false;
65 }
66
67 AtomicData a = (AtomicData) o;
68
69 if (currentMethod != a.currentMethod) {
70 return false;
71 }
72
73 if (line != a.line) {
74 return false;
75 }
76
77 if (inSameMethod != a.inSameMethod) {
78 return false;
79 }
80
81 return true;
82 }
83
84 /**
85 * Computes a hash code with the object data.
86 */
87 public void hash (HashData hd) {
88 hd.add(line);
89 hd.add(inSameMethod ? 1 : 0);
90 }
91
92 /**
93 * Returns a hash code for the object.
94 */
95 @Override
96 public int hashCode () {
97 HashData hd = new HashData();
98
99 hash(hd);
100
101 return hd.getValue();
102 }
103 }