Mercurial > hg > Members > kono > jpf-core
view src/classes/java/util/concurrent/atomic/AtomicLongArray.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is licensed under the * Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package java.util.concurrent.atomic; import java.io.Serializable; import java.util.Arrays; /** * model class for AtomicLongArray */ public class AtomicLongArray implements Serializable { private static final long serialVersionUID = -2308431214976778248L; private final long[] array; public AtomicLongArray(int length) { array = new long[length]; // <2do> need a volatile write in order to conform to JMM // Does this really matter in JPF? } public AtomicLongArray(long[] array) { if (array == null) throw new NullPointerException(); int length = array.length; this.array = new long[length]; for (int i = 0; i < length; ++i) this.array[i] = array[i]; // <2do> need a volatile write in order to conform to JMM // Does this really matter in JPF? } public final int length() { return(array.length); } public final long get(int i) { checkIndex(i); return(getNative(i)); } private final native long getNative(int i); public final boolean compareAndSet(int i, long expect, long update) { checkIndex(i); return(compareAndSetNative(i, expect, update)); } private final native boolean compareAndSetNative(int i, long expect, long update); public final boolean weakCompareAndSet(int i, long expect, long update) { return(compareAndSet(i, expect, update)); } public final long getAndSet(int i, long newValue) { while (true) { long current = get(i); if (compareAndSet(i, current, newValue)) return(current); } } public final void set(int i, long newValue) { getAndSet(i, newValue); } public final void lazySet(int i, long newValue) { set(i, newValue); } public final long getAndIncrement(int i) { return(getAndAdd(i, 1)); } public final long getAndDecrement(int i) { return(getAndAdd(i, -1)); } public final long getAndAdd(int i, long delta) { while (true) { long current = get(i); long next = current + delta; if (compareAndSet(i, current, next)) return(current); } } public final long incrementAndGet(int i) { return(getAndIncrement(i) + 1); } public final long decrementAndGet(int i) { return(getAndDecrement(i) - 1); } public final long addAndGet(int i, long delta) { return(getAndAdd(i, delta) + delta); } @Override public String toString() { // <2do> need a volatile read in order to conform to JMM // Does this really matter in JPF? return(Arrays.toString(array)); } private void checkIndex(int i) { if (i < 0 || i >= array.length) throw new IndexOutOfBoundsException("index " + i); } }