/*

 * Copyright (c) 2001, 2003, 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

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 * questions.

 */

/* @test

 * @bug 4940372

 * @summary Ensure that the wakeup state is cleared by selectNow()

 */

import java.nio.channels.*;

public class WakeupNow {

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

        test1();

        test2();

    }

    // Test if selectNow clears wakeup with the wakeup fd and

    // another fd in the selector.

    // This fails before the fix on Linux

    private static void test1() throws Exception {

        Selector sel = Selector.open();

        Pipe p = Pipe.open();

        p.source().configureBlocking(false);

        p.source().register(sel, SelectionKey.OP_READ);

        sel.wakeup();

        // ensure wakeup is consumed by selectNow

        Thread.sleep(2000);

        sel.selectNow();

        long startTime = System.currentTimeMillis();

        int n = sel.select(2000);

        long endTime = System.currentTimeMillis();

        p.source().close();

        p.sink().close();

        sel.close();

        if (endTime - startTime < 1000)

            throw new RuntimeException("test failed");

    }

    // Test if selectNow clears wakeup with only the wakeup fd

    // in the selector.

    // This fails before the fix on Solaris

    private static void test2() throws Exception {

        Selector sel = Selector.open();

        Pipe p = Pipe.open();

        p.source().configureBlocking(false);

        sel.wakeup();

        // ensure wakeup is consumed by selectNow

        Thread.sleep(2000);

        sel.selectNow();

        long startTime = System.currentTimeMillis();

        int n = sel.select(2000);

        long endTime = System.currentTimeMillis();

        sel.close();

        if (endTime - startTime < 1000)

            throw new RuntimeException("test failed");

    }

}