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 */
013package org.mmtk.utility.options;
014
015import org.vmmagic.pragma.*;
016
017/**
018 * A composite option that provides a min/max interface to MMTk,
019 * and a fixed/bounded option interface to the VM/user.
020 */
021public final class NurserySize {
022  // values
023  private final FixedNursery fixedNursery;
024  private final BoundedNursery boundedNursery;
025
026  /**
027   * Create the options.
028   */
029  public NurserySize() {
030    boundedNursery = new BoundedNursery();
031    fixedNursery = new FixedNursery(boundedNursery);
032  }
033
034  /**
035   * Read the upper bound of the nursery size.
036   *
037   * @return maximum number of pages in the nursery.
038   */
039  @Uninterruptible
040  public int getMaxNursery() {
041    return boundedNursery.getPages();
042  }
043
044  /**
045   * Read the lower bound of the nursery size.
046   *
047   * @return minimum number of pages in the nursery.
048   */
049  @Uninterruptible
050  public int getMinNursery() {
051    return fixedNursery.getPages();
052  }
053}