Mercurial > hg > Members > kono > jpf-core
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/classes/java/util/concurrent/atomic/AtomicLongArray.java Fri Jan 23 10:14:01 2015 -0800 @@ -0,0 +1,127 @@ +/* + * 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); + } +}