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comparison src/classes/java/util/concurrent/Exchanger.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 java.util.concurrent;
20
21 /**
22 * model class for java.util.concurrent.Exchanger
23 * We model because the original class goes to great lengths implementing
24 * memory based synchronization, using execution time and spins
25 *
26 * Exchangers are also per se shared objects, so we want to minimize field
27 * access from bytecode
28 */
29 public class Exchanger<V> {
30
31 // created on native side and pinned down until transaction is complete
32 static class Exchange<T> {
33 Thread waiterThread;
34 boolean waiterTimedOut;
35
36 T waiterData;
37 T responderData;
38 }
39
40 //-- only accessed from native methods
41 private Exchange<V> exchange;
42
43
44 public native V exchange(V value) throws InterruptedException;
45
46 private native V exchange0 (V value, long timeoutMillis) throws InterruptedException, TimeoutException;
47
48 // unfortunately we can't directly go native here without duplicating the TimeUnit conversion in the peer
49 public V exchange(V value, long timeout, TimeUnit unit) throws InterruptedException, TimeoutException {
50 long to = unit.convert(timeout,TimeUnit.MILLISECONDS);
51 return exchange0( value, to);
52 }
53 }