//
// Copyright (C) 2006 United States Government as represented by the
// Administrator of the National Aeronautics and Space Administration
// (NASA). All Rights Reserved.
//
// This software is distributed under the NASA Open Source Agreement
// (NOSA), version 1.3. The NOSA has been approved by the Open Source
// Initiative. See the file NOSA-1.3-JPF at the top of the distribution
// directory tree for the complete NOSA document.
//
// THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
// KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
// LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
// SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
// A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
// THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
// DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
//
package gov.nasa.jpf.vm;
import java.util.Arrays;
import gov.nasa.jpf.util.HashData;
/**
* this is the mutable Thread data we have to keep track of for storing/restoring states
*/
public class ThreadData {
/**
* Current state of the thread.
*/
ThreadInfo.State state;
/** the scheduler priority of this thread */
int priority;
/**
* the name of this thread
* (only temporarily unset, between NEW and INVOKESPECIAL)
*/
char[] name = new char[]{'?'};
/** is this a daemon thread */
boolean isDaemon;
/**
* The lock counter when the object got into a wait. This value
* is used to restore the object lock count once this thread
* gets notified
*/
int lockCount;
/**
* The suspend count of the thread. See ThreadInfo.suspend() for a discussion
* of how faithful this is (it is an over approximation)
*/
int suspendCount;
public ThreadData clone () {
ThreadData t = new ThreadData();
t.state = state;
t.lockCount = lockCount;
t.suspendCount = suspendCount;
t.priority = priority;
t.name = name;
t.isDaemon = isDaemon;
return t;
}
public boolean equals (Object o) {
if ((o == null) || !(o instanceof ThreadData)) {
return false;
}
ThreadData t = (ThreadData) o;
return ((state == t.state) &&
(priority == t.priority) &&
(isDaemon == t.isDaemon) &&
(lockCount == t.lockCount) &&
(suspendCount == t.suspendCount) &&
(Arrays.equals(name, t.name)));
}
public void hash (HashData hd) {
hd.add(state);
hd.add(lockCount);
hd.add(suspendCount);
hd.add(priority);
hd.add(isDaemon);
hd.add(name);
}
public int hashCode () {
HashData hd = new HashData();
hash(hd);
return hd.getValue();
}
public String toString () {
return ("ThreadData{" + getFieldValues() + '}');
}
public String getFieldValues () {
StringBuilder sb = new StringBuilder("name:");
sb.append(name);
sb.append(",status:");
sb.append(state.name());
sb.append(",priority:");
sb.append(priority);
sb.append(",lockCount:");
sb.append(lockCount);
sb.append(",suspendCount:");
sb.append(suspendCount);
return sb.toString();
}
public ThreadInfo.State getState() { return state; }
}