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.mmtk.plan.Plan;
016
017/**
018 * Provide an lower and upper bound on nursery size.<p>
019 *
020 * This option is not intended to be created directly, but via NurserySize.
021 */
022public final class FixedNursery extends org.vmutil.options.PagesOption {
023  // values
024  BoundedNursery boundedNursery;
025
026  public FixedNursery(BoundedNursery boundedNursery) {
027    super(Options.set, "Fixed Nursery",
028        "Fix the minimum and maximum size of the nursery to this value",
029        Plan.DEFAULT_MIN_NURSERY);
030    this.boundedNursery = boundedNursery;
031  }
032
033  /**
034   * Nursery can not be empty.
035   */
036  @Override
037  protected void validate() {
038    failIf(value <= 0, "Can not have an empty nursery");
039    // Update upper bound.
040    boundedNursery.setBytes(this.getBytes());
041  }
042}