/*

 * Copyright (c) 2003, 2018, 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.

 */

package nsk.jvmti.SuspendThread;

import java.io.PrintStream;

import nsk.share.*;

import nsk.share.jvmti.*;

public class suspendthrd002 extends DebugeeClass {

    // load native library if required

    static {

        System.loadLibrary("suspendthrd002");

    }

    // run test from command line

    public static void main(String argv[]) {

        argv = nsk.share.jvmti.JVMTITest.commonInit(argv);

        // JCK-compatible exit

        System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE);

    }

    // run test from JCK-compatible environment

    public static int run(String argv[], PrintStream out) {

        return new suspendthrd002().runIt(argv, out);

    }

    /* =================================================================== */

    // scaffold objects

    ArgumentHandler argHandler = null;

    Log log = null;

    long timeout = 0;

    int status = Consts.TEST_PASSED;

    // tested thread

    suspendthrd002Thread thread = null;

    // run debuggee

    public int runIt(String argv[], PrintStream out) {

        argHandler = new ArgumentHandler(argv);

        log = new Log(out, argHandler);

        timeout = argHandler.getWaitTime() * 60 * 1000; // milliseconds

        // create tested thread

        thread = new suspendthrd002Thread("TestedThread");

        // run tested thread

        log.display("Staring tested thread");

        try {

            thread.start();

            if (!thread.checkReady()) {

                throw new Failure("Unable to prepare tested thread: " + thread);

            }

            // testing sync

            log.display("Sync: thread started");

            status = checkStatus(status);

        } finally {

            // let thread to finish

            thread.letFinish();

        }

        // wait for thread to finish

        log.display("Finishing tested thread");

        try {

            thread.join();

        } catch (InterruptedException e) {

            throw new Failure(e);

        }

        // testing sync

        log.display("Sync: thread finished");

        status = checkStatus(status);

        return status;

    }

}

/* =================================================================== */

// basic class for tested threads

class suspendthrd002Thread extends Thread {

    private volatile boolean threadReady = false;

    private volatile boolean shouldFinish = false;

    // make thread with specific name

    public suspendthrd002Thread(String name) {

        super(name);

    }

    // run thread continuously

    public void run() {

        // run in a loop

        threadReady = true;

        int i = 0;

        int n = 1000;

        while (!shouldFinish) {

            if (n <= 0) {

                n = 1000;

            }

            if (i > n) {

                i = 0;

                n = n - 1;

            }

            i = i + 1;

            Thread.yield();

        }

    }

    // check if thread is ready

    public boolean checkReady() {

        try {

            while (!threadReady) {

                sleep(1000);

            }

        } catch (InterruptedException e) {

            throw new Failure("Interruption while preparing tested thread: \n\t" + e);

        }

        return threadReady;

    }

    // let thread to finish

    public void letFinish() {

        shouldFinish = true;

    }

}