--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/vm/ReleaseAction.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+package gov.nasa.jpf.vm;
+
+/**
+ * interface for actions to be taken when gc'ing objects that are no longer 
+ * reachable. 
+ * 
+ * This is meant to be used for types that have native companion objects
+ * which need to be cleaned up. We can't use Object.finalize() for this because
+ * this can be overridden in user code, and actually can make objects live again
+ */
+public interface ReleaseAction {
+  
+  /**
+   * object is about to be terminally released (no more finalization etc.)
+   */
+  public void release (ElementInfo ei);
+}