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    package org.mmtk.utility.options;
014    
015    import static org.mmtk.policy.immix.ImmixConstants.DEFAULT_LINE_REUSE_RATIO;
016    
017    /**
018     */
019    public class LineReuseRatio extends org.vmutil.options.FloatOption {
020      /**
021       * Create the option.
022       */
023      public LineReuseRatio() {
024        super(Options.set, "Line Reuse Ratio",
025              "Blocks with this fraction marked may be reused for allocation",
026              DEFAULT_LINE_REUSE_RATIO);
027      }
028    
029      /**
030       * Ensure the value is valid.
031       */
032      @Override
033      protected void validate() {
034        failIf((this.value <= 0 || this.value > 1.0), "Ratio must be a float between 0 and 1");
035      }
036    }