/*

 * Copyright (c) 1999, 2016, 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 4162583 7054918 8130181

 * @library ../testlibrary

 * @summary Make sure Provider api implementations are synchronized properly

 */

import java.security.*;

public class SynchronizedAccess {

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

        ProvidersSnapshot snapshot = ProvidersSnapshot.create();

        try {

            main0(args);

        } finally {

            snapshot.restore();

        }

    }

    public static void main0(String[] args) throws Exception {

        AccessorThread[] acc = new AccessorThread[200];

        for (int i=0; i < acc.length; i++)

            acc[i] = new AccessorThread("thread"+i);

        for (int i=0; i < acc.length; i++)

            acc[i].start();

        for (int i=0; i < acc.length; i++)

            acc[i].join();

    }

}

class AccessorThread extends Thread {

    public AccessorThread(String str) {

        super(str);

    }

    public void run() {

        Provider[] provs = new Provider[10];

        for (int i=0; i < provs.length; i++)

            provs[i] = new MyProvider("name"+i, "1", "test");

        int rounds = 20;

        while (rounds-- > 0) {

            try {

                for (int i=0; i<provs.length; i++) {

                    Security.addProvider(provs[i]);

                }

                Signature sig = Signature.getInstance("sigalg");

                for (int i=0; i<provs.length; i++) {

                    Security.removeProvider("name"+i);

                }

                provs = Security.getProviders();

            } catch (NoSuchAlgorithmException nsae) {

            }

            try {

                Thread.sleep(5);

            } catch (InterruptedException ie) {

            }

        } // while

    }

}

class MyProvider extends Provider {

    public MyProvider(String name, String version, String info) {

        super(name, version, info);

        put("Signature.sigalg", "sigimpl");

    }

}