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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/* @test
 * @bug 8195160
 * @summary  Socket.setSoTimeout(T) can cause incorrect delay of T
 *           under green threads
 * @requires (os.family == "linux")
 * @library .. /test/lib
 * @build RsocketTest
 * @run main/othervm -Djava.net.preferIPv4Stack=true SoTimeout
 */

/*
 * This program depends a bit on the particular behaviour of the green
 * threads scheduler to produce the problem, but given that the underlying
 * bug a green threads bug, I think that's OK.
 */

import java.net.*;
import jdk.net.Sockets;

public class SoTimeout implements Runnable {
    static ServerSocket serverSocket;
    static long timeWritten;
    static InetAddress addr;
    static int port;

    public static void main(String[] args) throws Exception {
        if (!RsocketTest.isRsocketAvailable())
            return;

        addr = InetAddress.getLocalHost();

        serverSocket = Sockets.openRdmaServerSocket();
        addr = InetAddress.getLocalHost();
        serverSocket.bind(new InetSocketAddress(addr, 0));

        port = serverSocket.getLocalPort();

        byte[] b = new byte[12];
        Thread t = new Thread(new SoTimeout());
        t.start();

        Socket s = serverSocket.accept();
        serverSocket.close();

        // set a 5 second timeout on the socket
        s.setSoTimeout(5000);

        s.getInputStream().read(b, 0, b.length);
        s.close();

        long waited = System.currentTimeMillis() - timeWritten;

        // this sequence should complete fairly quickly and if it
        // takes something resembling the the SoTimeout value then
        // we are probably incorrectly blocking and not waking up
        if (waited > 2000) {
            throw new Exception("shouldn't take " + waited + " to complete");
        }
    }

    public void run() {
        try {
            byte[] b = new byte[12];
            Socket s = Sockets.openRdmaSocket();
            s.connect(new InetSocketAddress(addr, port));

            Thread.yield();
            timeWritten = System.currentTimeMillis();
            s.getOutputStream().write(b, 0, 12);
            s.close();
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("Test Failed");
        }
    }

}