| /* |
| * Copyright (c) 2001, 2016, 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 6405995 |
| * @summary Unit test for selector wakeup and interruption |
| * @library .. /lib/testlibrary/ |
| */ |
| |
| import java.io.*; |
| import java.net.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| import java.util.concurrent.CyclicBarrier; |
| |
| public class Wakeup { |
| |
| static void sleep(int millis) { |
| try { |
| Thread.sleep(millis); |
| } catch (InterruptedException x) { |
| x.printStackTrace(); |
| } |
| } |
| |
| static class Sleeper extends TestThread { |
| private static final long TIMEOUT = jdk.testlibrary.Utils.adjustTimeout(20_000); |
| |
| // barrier is used to synchronize sleeper thread and checking |
| // thread which is the main thread: when go() get to the end, |
| // then start checking the sleeper's status. |
| private static CyclicBarrier barrier = new CyclicBarrier(2); |
| private static int wakeups = 0; |
| private static int waits = 0; |
| |
| volatile boolean interruptBeforeSelect = false; |
| volatile boolean started = false; |
| volatile boolean wantInterrupt = false; |
| volatile boolean closed = false; |
| Object gate = new Object(); |
| |
| Selector sel; |
| |
| Sleeper(Selector sel, boolean wantInterrupt, boolean interruptBeforeSelect) { |
| super("Sleeper", System.err); |
| this.sel = sel; |
| this.wantInterrupt = wantInterrupt; |
| this.interruptBeforeSelect = interruptBeforeSelect; |
| } |
| |
| public void go() throws Exception { |
| started = true; |
| if (interruptBeforeSelect) { |
| synchronized (gate) { } |
| } |
| wakeups++; |
| System.err.println("Wakeup, selecting, " + wakeups); |
| try { |
| sel.select(); |
| } catch (ClosedSelectorException x) { |
| closed = true; |
| } |
| boolean intr = Thread.currentThread().isInterrupted(); |
| System.err.println("Wakeup " + wakeups |
| + (closed ? " (closed)" : "") |
| + (intr ? " (intr)" : "")); |
| if (closed) |
| return; |
| if (wantInterrupt) { |
| while (!Thread.interrupted()) |
| Thread.yield(); |
| } |
| System.err.println("Wakeup, waiting, " + wakeups); |
| barrier.await(); |
| System.err.println("Wakeup, wait successfully, " + wakeups); |
| } |
| |
| void check(boolean close) throws Exception { |
| waits++; |
| System.err.println("waiting sleeper, " + waits); |
| if (!close) { |
| barrier.await(); |
| System.err.println("wait barrier successfully, " + waits); |
| } |
| if (finish(TIMEOUT) == 0) |
| throw new Exception("Test failed"); |
| if (this.closed != close) |
| throw new Exception("Selector was closed"); |
| } |
| |
| void check() throws Exception { |
| check(false); |
| } |
| |
| static Sleeper createSleeper(Selector sel, boolean wantInterrupt, |
| boolean interruptBeforeSelect) throws Exception { |
| if (!wantInterrupt && interruptBeforeSelect) { |
| throw new RuntimeException("Wrong parameters!"); |
| } |
| |
| Sleeper sleeper = new Sleeper(sel, wantInterrupt, interruptBeforeSelect); |
| |
| if (interruptBeforeSelect) { |
| synchronized(sleeper.gate) { |
| sleeper.start(); |
| while (!sleeper.started) |
| sleep(50); |
| sleeper.interrupt(); |
| } |
| } else { |
| sleeper.start(); |
| while (!sleeper.started) |
| sleep(50); |
| if (wantInterrupt) { |
| sleep(50); |
| sleeper.interrupt(); |
| } |
| } |
| return sleeper; |
| } |
| } |
| |
| static Sleeper newSleeper(Selector sel) throws Exception { |
| return Sleeper.createSleeper(sel, false, false); |
| } |
| |
| static Sleeper newSleeperWantInterrupt(Selector sel) throws Exception { |
| return Sleeper.createSleeper(sel, true, false); |
| } |
| |
| static Sleeper newSleeperWantInterruptBeforeSelect(Selector sel) throws Exception { |
| return Sleeper.createSleeper(sel, true, true); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| |
| Selector sel = Selector.open(); |
| |
| // Wakeup before select |
| sel.wakeup(); |
| |
| Sleeper sleeper = newSleeper(sel); // 1 |
| sleeper.check(); |
| |
| for (int i = 2; i < 5; i++) { |
| // Wakeup during select |
| sleeper = newSleeper(sel); |
| sel.wakeup(); |
| sleeper.check(); // 2 .. 4 |
| } |
| |
| // Double wakeup |
| sel.wakeup(); |
| sel.wakeup(); |
| sleeper = newSleeper(sel); |
| sleeper.check(); // 5 |
| |
| // Interrupt |
| sleeper = newSleeperWantInterrupt(sel); |
| sleeper.check(); // 6 |
| |
| // Interrupt before select |
| sleeper = newSleeperWantInterruptBeforeSelect(sel); |
| sleeper.check(); // 7 |
| |
| // Close during select |
| sleeper = newSleeper(sel); |
| sel.close(); |
| sleeper.check(); // 8 |
| |
| sleeper = newSleeper(sel); |
| sleeper.check(true); |
| } |
| |
| } |