UnsafeParallelTask.java

/*
 * JVSTM: a Java library for Software Transactional Memory
 * Copyright (C) 2005 INESC-ID Software Engineering Group
 * http://www.esw.inesc-id.pt
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Author's contact:
 * INESC-ID Software Engineering Group
 * Rua Alves Redol 9
 * 1000 - 029 Lisboa
 * Portugal
 */
package jvstm;


public abstract class UnsafeParallelTask<T> extends TransactionalTask<T> {

    @Override
    public T call() throws Exception {
        super.parent.start();
        Transaction tx = Transaction.beginUnsafeMultithreaded();
        try {
            T value = execute();
            tx.commit();
            tx = null;
            return value;
        } catch (EarlyAbortException eae) {
            tx.abort();
            throw eae;
        } catch (CommitException ce) {
            tx.abort();
            throw ce;
        } catch (Throwable t) {
            if (t instanceof Exception) {
                throw (Exception) t;
            } else {
                t.printStackTrace();
                System.exit(0);
                return null;
            }
        }
    }

}