---

FGWorkSendVals.java

package edu.ksu.cis.bandera.bofa;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Bandera, a Java(TM) analysis and transformation toolkit           *
 * Copyright (C) 1998, 1999   Shawn Laubach (laubach@acm.org)        *
 * All rights reserved.                                              *
 *                                                                   *
 * This work was done as a project in the SAnToS Laboratory,         *
 * Department of Computing and Information Sciences, Kansas State    *
 * University, USA (http://www.cis.ksu.edu/santos).                  *
 * It is understood that any modification not identified as such is  *
 * not covered by the preceding statement.                           *
 *                                                                   *
 * This work is free software; you can redistribute it and/or        *
 * modify it under the terms of the GNU Library General Public       *
 * License as published by the Free Software Foundation; either      *
 * version 2 of the License, or (at your option) any later version.  *
 *                                                                   *
 * This work 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 *
 * Library General Public License for more details.                  *
 *                                                                   *
 * You should have received a copy of the GNU Library General Public *
 * License along with this toolkit; if not, write to the             *
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
 * Boston, MA  02111-1307, USA.                                      *
 *                                                                   *
 * Java is a trademark of Sun Microsystems, Inc.                     *
 *                                                                   *
 * To submit a bug report, send a comment, or get the latest news on *
 * this project and other SAnToS projects, please visit the web-site *
 *                http://www.cis.ksu.edu/santos                      *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

import ca.mcgill.sable.util.*;

/* 
 * FGWorkSendVals.java 
 * $Id: FGWorkSendVals.java,v 1.1.1.1 2002/01/24 03:42:08 pserver Exp $
 */

/**
 * This class is a specialized form of work concerned with pushing along new
 * values to flow graph nodes.
 *
 * @author <A HREF="mailto:hatcliff@cis.ksu.edu">John Hatcliff</A>
 * @author
 * <a href="http://www.cis.ksu.edu/~rvprasad">Venkatesh Prasad Ranganath</a>
 * @version $Name:  $($Revision: 1.1.1.1 $)
 */
public class FGWorkSendVals extends FGWork
{
    /** 
     * Set of values to be pushed into the destination node. 
     */
    private FASet values;

    /**
     * Constructor for the class.
     *
     * @param values the set of values to be pushed.
     * @param dest the node where the values are to be sent.  */
    public FGWorkSendVals(FASet values, FGNode dest)
    {
        this.values = values;
        this.dest   = dest;
    }
    /*
     * Carries out the work associated with this work object.  First, we find
     * the "new" values that will be arriving at destination by building a set
     * <em>deltaValues<\em> containing the difference between the current values
     * at dest and the sent values.  If deltaValues is non-empty, then we invoke
     * each action for this node on deltaValues.  Finally, we generate new work
     * that will send deltaValues to each successor of this node.
    */

    /**
     * Pushes the given values into the given flow graph node.
     *
     */
    public void doWork()
    {
        FASet destValues, deltaValues;

        destValues = dest.getValues();
        deltaValues = values.buildDiffSet(destValues);

        if (!deltaValues.isEmpty()) {
            destValues.addAll(deltaValues);

            FGAction action;
            // carry out each action
            for (Iterator i = dest.getActions().iterator(); i.hasNext();) {
                action = (FGAction) i.next();
                action.doAction(deltaValues);
            }
            FGNode succ;
            // send new values to successors
            for (Iterator i = dest.getSuccs().iterator(); i.hasNext();) {
                succ = (FGNode) i.next();
                FA.workList.insert(new FGWorkSendVals(deltaValues,succ));
            }

        }
    }
}

---