/*

 * Copyright 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

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

 * have any questions.

 */

/*

 * @test

 * @bug     6434084

 * @summary Exercise ThreadLocal javadoc "demo" class ThreadId

 * @author  Pete Soper

 */

public final class TestThreadId extends Thread {

    // number of times to create threads and gather their ids

    private static final int ITERATIONCOUNT = 50;

    // Threads constructed per iteration. ITERATIONCOUNT=50 and

    // THREADCOUNT=50 takes about one second on a sun Blade 1000 (2x750mhz)

    private static final int THREADCOUNT = 50;

    // The thread local storage object for holding per-thread ids

    private static ThreadId id = new ThreadId();

    // Holds the per-thread so main method thread can collect it. JMM

    // guarantees this is valid after this thread joins main method thread.

    private int value;

    private synchronized int getIdValue() {

        return value;

    }

    // Each child thread just publishes its id value for validation

    public void run() {

        value = id.get();

    }

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

        // holds true corresponding to a used id value

        boolean check[] = new boolean[THREADCOUNT*ITERATIONCOUNT];

        // the test threads

        TestThreadId u[] = new TestThreadId[THREADCOUNT];

        for (int i = 0; i < ITERATIONCOUNT; i++) {

            // Create and start the threads

            for (int t=0;t<THREADCOUNT;t++) {

                u[t] = new TestThreadId();

                u[t].start();

            }

            // Join with each thread and get/check its id

            for (int t=0;t<THREADCOUNT;t++) {

                try {

                    u[t].join();

                } catch (InterruptedException e) {

                     throw new RuntimeException(

                        "TestThreadId: Failed with unexpected exception" + e);

                }

                try {

                    if (check[u[t].getIdValue()]) {

                        throw new RuntimeException(

                            "TestThreadId: Failed with duplicated id: " +

                                u[t].getIdValue());

                    } else {

                        check[u[t].getIdValue()] = true;

                    }

                } catch (Exception e) {

                    throw new RuntimeException(

                        "TestThreadId: Failed with unexpected id value" + e);

                }

            }

        }

    } // main

} // TestThreadId