1/* 2 * Copyright (C) 2009 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package java.util.concurrent.atomic; 18 19/** 20 * GWT emulated version of {@link AtomicInteger}. It's a thin wrapper 21 * around the primitive {@code int}. 22 * 23 * @author Hayward Chan 24 */ 25public class AtomicInteger extends Number implements java.io.Serializable { 26 27 private int value; 28 29 public AtomicInteger(int initialValue) { 30 value = initialValue; 31 } 32 33 public AtomicInteger() { 34 } 35 36 public final int get() { 37 return value; 38 } 39 40 public final void set(int newValue) { 41 value = newValue; 42 } 43 44 public final void lazySet(int newValue) { 45 set(newValue); 46 } 47 48 public final int getAndSet(int newValue) { 49 int current = value; 50 value = newValue; 51 return current; 52 } 53 54 public final boolean compareAndSet(int expect, int update) { 55 if (value == expect) { 56 value = update; 57 return true; 58 } else { 59 return false; 60 } 61 } 62 63 public final int getAndIncrement() { 64 return value++; 65 } 66 67 public final int getAndDecrement() { 68 return value--; 69 } 70 71 public final int getAndAdd(int delta) { 72 int current = value; 73 value += delta; 74 return current; 75 } 76 77 public final int incrementAndGet() { 78 return ++value; 79 } 80 81 public final int decrementAndGet() { 82 return --value; 83 } 84 85 public final int addAndGet(int delta) { 86 value += delta; 87 return value; 88 } 89 90 @Override public String toString() { 91 return Integer.toString(value); 92 } 93 94 public int intValue() { 95 return value; 96 } 97 98 public long longValue() { 99 return (long) value; 100 } 101 102 public float floatValue() { 103 return (float) value; 104 } 105 106 public double doubleValue() { 107 return (double) value; 108 } 109} 110