Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/vm/PersistentTidSet.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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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.vm;
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20
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21
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22 /**
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23 * set that stores threads via (search global) thread ids. Used to detect shared objects/classes,
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24 * created by configured SharedObjectPolicy factory.
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25 * This set is persistent, i.e. does not modify contents of existing set instances to avoid
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26 * introducing search global state
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27 */
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28 public class PersistentTidSet extends TidSet {
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29
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30 public PersistentTidSet (ThreadInfo ti){
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31 super(ti);
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32 }
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33
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34 //--- non-destructive set update
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35
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36 @Override
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37 public ThreadInfoSet add (ThreadInfo ti) {
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38 int id = ti.getId();
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39
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40 if (!contains(id)){
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41 PersistentTidSet newSet = (PersistentTidSet)clone();
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42 newSet.add(id);
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43 return newSet;
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44
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45 } else {
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46 return this;
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47 }
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48 }
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49
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50 @Override
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51 public ThreadInfoSet remove (ThreadInfo ti) {
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52 int id = ti.getId();
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53
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54 if (contains(id)){
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55 PersistentTidSet newSet = (PersistentTidSet)clone();
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56 newSet.remove(id);
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57 return newSet;
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58
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59 } else {
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60 return this;
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61 }
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62 }
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63 }