11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2009 Google Inc. 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage java.util.concurrent.atomic; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * GWT emulated version of {@link AtomicInteger}. It's a thin wrapper 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * around the primitive {@code int}. 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Hayward Chan 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class AtomicInteger extends Number implements java.io.Serializable { 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private int value; 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public AtomicInteger(int initialValue) { 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value = initialValue; 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public AtomicInteger() { 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int get() { 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return value; 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final void set(int newValue) { 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value = newValue; 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final void lazySet(int newValue) { 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert set(newValue); 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int getAndSet(int newValue) { 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int current = value; 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value = newValue; 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return current; 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final boolean compareAndSet(int expect, int update) { 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert if (value == expect) { 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value = update; 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return true; 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } else { 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return false; 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int getAndIncrement() { 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return value++; 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int getAndDecrement() { 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return value--; 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int getAndAdd(int delta) { 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int current = value; 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value += delta; 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return current; 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int incrementAndGet() { 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return ++value; 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int decrementAndGet() { 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return --value; 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public final int addAndGet(int delta) { 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert value += delta; 871d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return value; 881d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 891d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 901d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public String toString() { 911d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return Integer.toString(value); 921d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 931d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 941d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public int intValue() { 951d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return value; 961d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 971d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 981d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public long longValue() { 991d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return (long) value; 1001d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1011d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1021d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public float floatValue() { 1031d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return (float) value; 1041d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1051d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1061d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public double doubleValue() { 1071d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return (double) value; 1081d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1091d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 110