1 /* 2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.debug; 26 27 import java.util.ArrayList; 28 import java.util.List; 29 30 import jdk.internal.vm.compiler.collections.EconomicMap; 31 32 /** 33 * Registry for allocating a globally unique integer id to each {@link AbstractKey}. 34 */ 35 public class KeyRegistry { 36 37 private static final EconomicMap<String, Integer> keyMap = EconomicMap.create(); 38 private static final List<AbstractKey> keys = new ArrayList<>(); 39 40 /** 41 * Ensures a given metric key is registered. 42 * 43 * @return the globally unique id for {@code value} 44 */ 45 static synchronized int register(AbstractKey key) { 46 String name = key.getName(); 47 if (!keyMap.containsKey(name)) { 48 keyMap.put(name, keys.size()); 49 keys.add(key); 50 } 51 return keyMap.get(name); 52 } 53 54 /** 55 * Gets a copy of the registered keys. 56 * 57 * @return a list where {@code get(i).getIndex() == i} 58 */ 59 public static synchronized List<MetricKey> getKeys() { 60 return new ArrayList<>(keys); 61 } 62 }