/*

 * Copyright 2004 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

 * @summary Basic functional test of remove method for ThreadLocal

 * @author Seetharama Avadhanam

 */

public class TLRemoveTest {

    private static final int INITIAL_VALUE = 101;

    private static final int REMOVE_SET_VALUE = 102;

    static ThreadLocal<Integer> n = new ThreadLocal<Integer>() {

        protected synchronized Integer initialValue() {

            return INITIAL_VALUE;

        }

    };

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

        int threadCount = 100;

        final int[] removeNode = {10,20,45,38};

        // ThreadLocal values will be removed for these threads.

        final int[] removeAndSet = {12,34,10};

        // ThreadLocal values will be removed and sets new values..

        Thread th[] = new Thread[threadCount];

        final int x[] = new int[threadCount];

        final Throwable exceptions[] = new Throwable[threadCount];

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

            final int threadId = i;

            th[i] = new Thread() {

                public void run() {

                    try{

                        n.set(threadId); // Sets threadId as threadlocal value...

                        for (int j = 0; j<threadId; j++)

                            Thread.currentThread().yield();

                        // To remove the ThreadLocal ....

                        for(int removeId  : removeNode)

                            if(threadId == removeId){

                               n.remove(); // Removes ThreadLocal values..

                               break;

                            }

                        // To remove the ThreadLocal value and set new value ...

                        for(int removeId  : removeAndSet)

                            if(threadId == removeId){

                               n.remove(); // Removes the ThreadLocal Value...

                               n.set(REMOVE_SET_VALUE); /* Setting new Values to

                                                          ThreadLocal */

                               break;

                            }

                            /* Storing the threadlocal values in 'x'

                               ...so that it can be used for checking results... */

                        x[threadId] = n.get();

                    }

                    catch(Throwable ex){

                        exceptions[threadId] = ex;

                    }

                }

            };

            th[i].start();

        }

        // Wait for the threads to finish

        for(int i = 0; i<threadCount; i++)

            th[i].join();

        // Check results

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

            int checkValue = i;

            /* If the remove method is called then the ThreadLocal value will

             * be its initial value */

            for(int removeId : removeNode)

                if(removeId == i){

                    checkValue = INITIAL_VALUE;

                    break;

                }

            for(int removeId : removeAndSet)

                if(removeId == i){

                    checkValue = REMOVE_SET_VALUE;

                    break;

                }

            if(exceptions[i] != null)

                throw(exceptions[i]);

            if(x[i] != checkValue)

                throw(new Throwable("x[" + i + "] =" + x[i]));

        }

    }

}