| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6332435 |
| * @summary Basic tests for CountDownLatch |
| * @author Seetharam Avadhanam, Martin Buchholz |
| */ |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| interface AwaiterFactory { |
| Awaiter getAwaiter(); |
| } |
| |
| abstract class Awaiter extends Thread { |
| private volatile Throwable result = null; |
| protected void result(Throwable result) { this.result = result; } |
| public Throwable result() { return this.result; } |
| } |
| |
| public class Basic { |
| |
| private void toTheStartingGate(CountDownLatch gate) { |
| try { |
| gate.await(); |
| } |
| catch (Throwable t) { fail(t); } |
| } |
| |
| private Awaiter awaiter(final CountDownLatch latch, |
| final CountDownLatch gate) { |
| return new Awaiter() { public void run() { |
| System.out.println("without millis: " + latch.toString()); |
| gate.countDown(); |
| |
| try { |
| latch.await(); |
| System.out.println("without millis - ComingOut"); |
| } |
| catch (Throwable result) { result(result); }}}; |
| } |
| |
| private Awaiter awaiter(final CountDownLatch latch, |
| final CountDownLatch gate, |
| final long millis) { |
| return new Awaiter() { public void run() { |
| System.out.println("with millis: "+latch.toString()); |
| gate.countDown(); |
| |
| try { |
| latch.await(millis, TimeUnit.MILLISECONDS); |
| System.out.println("with millis - ComingOut"); |
| } |
| catch (Throwable result) { result(result); }}}; |
| } |
| |
| private AwaiterFactory awaiterFactories(final CountDownLatch latch, |
| final CountDownLatch gate, |
| final int i) { |
| if (i == 1) |
| return new AwaiterFactory() { public Awaiter getAwaiter() { |
| return awaiter(latch, gate); }}; |
| |
| return new AwaiterFactory() { public Awaiter getAwaiter() { |
| return awaiter(latch, gate, 10000); }}; |
| } |
| |
| //---------------------------------------------------------------- |
| // Normal use |
| //---------------------------------------------------------------- |
| public static void normalUse() throws Throwable { |
| int count = 0; |
| Basic test = new Basic(); |
| CountDownLatch latch = new CountDownLatch(3); |
| Awaiter[] a = new Awaiter[12]; |
| |
| for (int i = 0; i < 3; i++) { |
| CountDownLatch gate = new CountDownLatch(4); |
| AwaiterFactory factory1 = test.awaiterFactories(latch, gate, 1); |
| AwaiterFactory factory2 = test.awaiterFactories(latch, gate, 0); |
| a[count] = factory1.getAwaiter(); a[count++].start(); |
| a[count] = factory1.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| test.toTheStartingGate(gate); |
| System.out.println("Main Thread: " + latch.toString()); |
| latch.countDown(); |
| checkCount(latch, 2-i); |
| } |
| for (int i = 0; i < 12; i++) |
| a[i].join(); |
| |
| for (int i = 0; i < 12; i++) |
| checkResult(a[i], null); |
| } |
| |
| //---------------------------------------------------------------- |
| // One thread interrupted |
| //---------------------------------------------------------------- |
| public static void threadInterrupted() throws Throwable { |
| int count = 0; |
| Basic test = new Basic(); |
| CountDownLatch latch = new CountDownLatch(3); |
| Awaiter[] a = new Awaiter[12]; |
| |
| for (int i = 0; i < 3; i++) { |
| CountDownLatch gate = new CountDownLatch(4); |
| AwaiterFactory factory1 = test.awaiterFactories(latch, gate, 1); |
| AwaiterFactory factory2 = test.awaiterFactories(latch, gate, 0); |
| a[count] = factory1.getAwaiter(); a[count++].start(); |
| a[count] = factory1.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| a[count-1].interrupt(); |
| test.toTheStartingGate(gate); |
| System.out.println("Main Thread: " + latch.toString()); |
| latch.countDown(); |
| checkCount(latch, 2-i); |
| } |
| for (int i = 0; i < 12; i++) |
| a[i].join(); |
| |
| for (int i = 0; i < 12; i++) |
| checkResult(a[i], |
| (i % 4) == 3 ? InterruptedException.class : null); |
| } |
| |
| //---------------------------------------------------------------- |
| // One thread timed out |
| //---------------------------------------------------------------- |
| public static void timeOut() throws Throwable { |
| int count =0; |
| Basic test = new Basic(); |
| CountDownLatch latch = new CountDownLatch(3); |
| Awaiter[] a = new Awaiter[12]; |
| |
| long[] timeout = { 0L, 5L, 10L }; |
| |
| for (int i = 0; i < 3; i++) { |
| CountDownLatch gate = new CountDownLatch(4); |
| AwaiterFactory factory1 = test.awaiterFactories(latch, gate, 1); |
| AwaiterFactory factory2 = test.awaiterFactories(latch, gate, 0); |
| a[count] = test.awaiter(latch, gate, timeout[i]); a[count++].start(); |
| a[count] = factory1.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| a[count] = factory2.getAwaiter(); a[count++].start(); |
| test.toTheStartingGate(gate); |
| System.out.println("Main Thread: " + latch.toString()); |
| latch.countDown(); |
| checkCount(latch, 2-i); |
| } |
| for (int i = 0; i < 12; i++) |
| a[i].join(); |
| |
| for (int i = 0; i < 12; i++) |
| checkResult(a[i], null); |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| normalUse(); |
| threadInterrupted(); |
| timeOut(); |
| if (failures.get() > 0L) |
| throw new AssertionError(failures.get() + " failures"); |
| } |
| |
| private static final AtomicInteger failures = new AtomicInteger(0); |
| |
| private static void fail(String msg) { |
| fail(new AssertionError(msg)); |
| } |
| |
| private static void fail(Throwable t) { |
| t.printStackTrace(); |
| failures.getAndIncrement(); |
| } |
| |
| private static void checkCount(CountDownLatch b, int expected) { |
| if (b.getCount() != expected) |
| fail("Count = " + b.getCount() + |
| ", expected = " + expected); |
| } |
| |
| private static void checkResult(Awaiter a, Class c) { |
| Throwable t = a.result(); |
| if (! ((t == null && c == null) || c.isInstance(t))) { |
| System.out.println("Mismatch: " + t + ", " + c.getName()); |
| failures.getAndIncrement(); |
| } |
| } |
| } |