1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8195160 27 * @summary Test that RDMA channels can be registered, interest ops can changed, 28 * and keys cancelled while a selection operation is in progress. 29 * @requires (os.family == "linux") 30 * @library .. /test/lib 31 * @build RsocketTest 32 * @run main/othervm -Djava.net.preferIPv4Stack=true BasicAccept 33 */ 34 import java.io.IOException; 35 import java.nio.channels.Pipe; 36 import java.nio.channels.SelectionKey; 37 import java.nio.channels.Selector; 38 import java.util.concurrent.Callable; 39 import java.util.concurrent.ExecutorService; 40 import java.util.concurrent.Executors; 41 import java.util.concurrent.Future; 42 import java.util.concurrent.Phaser; 43 import jdk.net.Sockets; 44 45 public class RegisterDuringSelect { 46 47 static Callable<Void> selectLoop(Selector sel, Phaser barrier) { 48 return new Callable<Void>() { 49 @Override 50 public Void call() throws IOException { 51 for (;;) { 52 sel.select(); 53 if (sel.isOpen()) { 54 barrier.arriveAndAwaitAdvance(); 55 } else { 56 // closed 57 return null; 58 } 59 } 60 } 61 }; 62 } 63 /** 64 * Invoke register, interestOps, and cancel concurrently with a thread 65 * doing a selection operation 66 */ 67 public static void main(String args[]) throws Exception { 68 if (!RsocketTest.isRsocketAvailable()) 69 return; 70 71 Future<Void> result; 72 73 ExecutorService pool = Executors.newFixedThreadPool(1); 74 try (Selector sel = Sockets.openRdmaSelector()) { 75 Phaser barrier = new Phaser(2); 76 77 // submit task to do the select loop 78 result = pool.submit(selectLoop(sel, barrier)); 79 80 Pipe p = Pipe.open(); 81 try { 82 Pipe.SourceChannel sc = p.source(); 83 sc.configureBlocking(false); 84 85 System.out.println("register ..."); 86 SelectionKey key = sc.register(sel, SelectionKey.OP_READ); 87 if (!sel.keys().contains(key)) 88 throw new RuntimeException("key not in key set"); 89 sel.wakeup(); 90 barrier.arriveAndAwaitAdvance(); 91 92 System.out.println("interestOps ..."); 93 key.interestOps(0); 94 sel.wakeup(); 95 barrier.arriveAndAwaitAdvance(); 96 97 System.out.println("cancel ..."); 98 key.cancel(); 99 sel.wakeup(); 100 barrier.arriveAndAwaitAdvance(); 101 if (sel.keys().contains(key)) 102 throw new RuntimeException("key not removed from key set"); 103 104 } finally { 105 p.source().close(); 106 p.sink().close(); 107 } 108 109 } finally { 110 pool.shutdown(); 111 } 112 113 // ensure selectLoop completes without exception 114 result.get(); 115 116 } 117 }