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.jikesrvm.compilers.opt.escape;
014
015import org.jikesrvm.classloader.RVMMethod;
016import org.jikesrvm.util.ImmutableEntryHashMapRVM;
017
018/**
019 * Class that holds method summary information.
020 * This class is a Singleton.
021 *
022 * <p> This database holds summaries:
023 *  <ul>
024 *   <li>MethodSummary, indexed by RVMMethod
025 *  </ul>
026 */
027class SummaryDatabase {
028
029  public static synchronized MethodSummary findMethodSummary(RVMMethod m) {
030    return hash.get(m);
031  }
032
033  public static synchronized MethodSummary findOrCreateMethodSummary(RVMMethod m) {
034    MethodSummary result = findMethodSummary(m);
035    if (result == null) {
036      result = new MethodSummary(m);
037      hash.put(m, result);
038    }
039    return result;
040  }
041
042  private static final ImmutableEntryHashMapRVM<RVMMethod, MethodSummary> hash =
043    new ImmutableEntryHashMapRVM<RVMMethod, MethodSummary>();
044}