2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
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
10 * http://www.apache.org/licenses/LICENSE-2.0.
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.
18 package gov.nasa.jpf.search.heuristic;
20 import gov.nasa.jpf.Config;
21 import gov.nasa.jpf.vm.VM;
22 import gov.nasa.jpf.vm.Transition;
26 * a heuristic state prioritizer that favors certain threads (specified
27 * by thread names during initialization)
29 * <2do> for both efficiency and encapsulation reasons, this should be just
30 * a Scheduler policy (so that we don't have to expand all children)
32 public class PreferThreads extends SimplePriorityHeuristic {
33 String[] preferredThreads;
35 public PreferThreads (Config config, VM vm) {
38 preferredThreads = config.getStringArray("search.heuristic.preferredThreads");
42 protected int computeHeuristicValue () {
43 Transition t = vm.getLastTransition();
49 String tn = vm.getThreadName();
51 for (int i = 0; i < preferredThreads.length; i++) {
52 if (tn.equals(preferredThreads[i])) {