Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/util/CountDown.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
19 package gov.nasa.jpf.util;
20
21 final class CountDown extends RuntimeException {
22 private int remaining;
23
24 CountDown (int remaining){
25 this.remaining = remaining;
26 }
27
28 public final int dec(){
29 if (remaining <= 0){
30 throw this;
31 }
32 remaining--;
33 return remaining;
34 }
35
36 public final void expire (){
37 remaining = 0;
38 }
39
40 public final void set(int remaining){
41 this.remaining = remaining;
42 }
43 }