001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    
014    package org.mmtk.vm;
015    
016    import org.mmtk.policy.Space;
017    import org.vmmagic.pragma.Uninterruptible;
018    import org.vmmagic.unboxed.Address;
019    import org.vmmagic.unboxed.Extent;
020    
021    /**
022     * Event generation interface for MMTk.
023     */
024    @Uninterruptible
025    public abstract class MMTk_Events {
026      public abstract void tracePageAcquired(Space space, Address startAddress, int numPages);
027    
028      public abstract void tracePageReleased(Space space, Address startAddress, int numPages);
029    
030      public abstract void heapSizeChanged(Extent heapSize);
031    
032    }