LockTest.java Source File

00001 package edu.ksu.cis.bandera.bir;
00002 
00003 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
00004  * Bandera, a Java(TM) analysis and transformation toolkit           *
00005  * Copyright (C) 1998, 1999   James Corbett (corbett@hawaii.edu)     *
00006  * All rights reserved.                                              *
00007  *                                                                   *
00008  * This work was done as a project in the SAnToS Laboratory,         *
00009  * Department of Computing and Information Sciences, Kansas State    *
00010  * University, USA (http://www.cis.ksu.edu/santos).                  *
00011  * It is understood that any modification not identified as such is  *
00012  * not covered by the preceding statement.                           *
00013  *                                                                   *
00014  * This work is free software; you can redistribute it and/or        *
00015  * modify it under the terms of the GNU Library General Public       *
00016  * License as published by the Free Software Foundation; either      *
00017  * version 2 of the License, or (at your option) any later version.  *
00018  *                                                                   *
00019  * This work is distributed in the hope that it will be useful,      *
00020  * but WITHOUT ANY WARRANTY; without even the implied warranty of    *
00021  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU *
00022  * Library General Public License for more details.                  *
00023  *                                                                   *
00024  * You should have received a copy of the GNU Library General Public *
00025  * License along with this toolkit; if not, write to the             *
00026  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
00027  * Boston, MA  02111-1307, USA.                                      *
00028  *                                                                   *
00029  * Java is a trademark of Sun Microsystems, Inc.                     *
00030  *                                                                   *
00031  * To submit a bug report, send a comment, or get the latest news on *
00032  * this project and other SAnToS projects, please visit the web-site *
00033  *                http://www.cis.ksu.edu/santos                      *
00034  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00035 import ca.mcgill.sable.util.*;
00036 
00037 /**
00038  * A lock test.
00039  */
00040 
00041 public class LockTest implements Expr, BirConstants {
00042    
00043     Expr lockExpr;
00044     int operation;
00045     BirThread thread;
00046 
00047     /**
00048      * Create a lock action.
00049      * @param lockExpr expression naming lock
00050      * @param operation code for operation
00051      * @param thread thread invoking operation
00052      */
00053     public LockTest(Expr lockExpr, int operation,
00054              BirThread thread) {
00055     this.lockExpr = lockExpr;
00056     this.operation = operation;
00057     this.thread = thread;
00058     }
00059     public void apply(Switch sw)
00060     {
00061         ((ExprSwitch) sw).caseLockTest(this);
00062     }
00063     public Expr getLockExpr() { return lockExpr; }
00064     public int getOperation() { return operation; }
00065     public BirThread getThread() { return thread; }
00066     public Type getType() { return Type.booleanType; }
00067     static String operationName(int operation) {
00068     switch (operation) {
00069     case LOCK_AVAILABLE: return "lockAvailable";
00070     case HAS_LOCK: return "hasLock";
00071     case WAS_NOTIFIED: return "wasNotified";
00072     default: return "?";
00073     }
00074     }
00075 }