1 /*

     2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4953599

    26  * @run main/timeout=15 CheckLocking

    27  * @summary check if setInterest blocks while in select

    28  */

    29 

    30 import java.nio.*;

    31 import java.nio.channels.*;

    32 import java.nio.channels.spi.*;

    33 import java.net.*;

    34 

    35 public class CheckLocking implements Runnable {

    36 

    37     private static Selector selector;

    38 

    39     public CheckLocking() {

    40     }

    41 

    42     public void run() {

    43         try {

    44             selector.select();

    45         } catch (Throwable th) {

    46             th.printStackTrace();

    47         }

    48     }

    49 

    50     private static void doSelect() throws Exception {

    51         Thread thread = new Thread(new CheckLocking());

    52         thread.start();

    53         Thread.sleep(1000);

    54     }

    55 

    56     public static void main (String[] args) throws Exception {

    57         selector = SelectorProvider.provider().openSelector();

    58         SocketChannel sc = SocketChannel.open();

    59         sc.configureBlocking(false);

    60         SelectionKey sk = sc.register(selector,0,null);

    61         doSelect();

    62         sk.interestOps(SelectionKey.OP_READ);

    63         selector.wakeup();

    64     }

    65 }