//
// Copyright (C) 2012 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;
/**
* interface to abstract the referencing set of threadinfos per object/class
* Used to detect shared objects/classes
* Instances are created through a configured factory (SharedObjectPolicy)
*
* We abstract the container so that the way we identify threads is not exposed
* to the client, and implementations can use either ThreadInfo references or
* global ids.
*/
public interface ThreadInfoSet extends Cloneable {
/**
* @return true if the thread wasn't in the set yet and was added
*/
ThreadInfoSet add (ThreadInfo ti);
ThreadInfoSet remove (ThreadInfo ti);
boolean contains (ThreadInfo ti);
boolean isShared (ThreadInfo ti, ElementInfo ei);
boolean hasMultipleLiveThreads ();
boolean hasMultipleRunnableThreads ();
Memento<ThreadInfoSet> getMemento();
int size();
}