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Diffstat (limited to 'classpath/java/util/concurrent/atomic/AtomicIntegerArray.java')
| -rw-r--r-- | classpath/java/util/concurrent/atomic/AtomicIntegerArray.java | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/classpath/java/util/concurrent/atomic/AtomicIntegerArray.java b/classpath/java/util/concurrent/atomic/AtomicIntegerArray.java deleted file mode 100644 index d0064b21..00000000 --- a/classpath/java/util/concurrent/atomic/AtomicIntegerArray.java +++ /dev/null @@ -1,225 +0,0 @@ -/* - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -/* - * This file is available under and governed by the GNU General Public - * License version 2 only, as published by the Free Software Foundation. - * However, the following notice accompanied the original version of this - * file: - * - * Written by Doug Lea with assistance from members of JCP JSR-166 - * Expert Group and released to the public domain, as explained at - * http://creativecommons.org/publicdomain/zero/1.0/ - */ - -package java.util.concurrent.atomic; - -import java.util.*; - -/** - * An {@code int} array in which elements may be updated atomically. - * See the {@link java.util.concurrent.atomic} package - * specification for description of the properties of atomic - * variables. - * @since 1.5 - * @author Doug Lea - */ -public class AtomicIntegerArray implements java.io.Serializable { - private static final long serialVersionUID = 2862133569453604235L; - - private final int[] array; - - /** - * Creates a new AtomicIntegerArray of the given length, with all - * elements initially zero. - * - * @param length the length of the array - */ - public AtomicIntegerArray(int length) { - array = new int[length]; - } - - /** - * Creates a new AtomicIntegerArray with the same length as, and - * all elements copied from, the given array. - * - * @param array the array to copy elements from - * @throws NullPointerException if array is null - */ - public AtomicIntegerArray(int[] array) { - // Visibility guaranteed by final field guarantees - this.array = array.clone(); - } - - /** - * Returns the length of the array. - * - * @return the length of the array - */ - public final int length() { - return array.length; - } - - /** - * Gets the current value at position {@code i}. - * - * @param i the index - * @return the current value - */ - public final native int get(int i); - - /** - * Sets the element at position {@code i} to the given value. - * - * @param i the index - * @param newValue the new value - */ - public final native void set(int i, int newValue); - - /** - * Eventually sets the element at position {@code i} to the given value. - * - * @param i the index - * @param newValue the new value - * @since 1.6 - */ - public final void lazySet(int i, int newValue) { - set(i, newValue); - } - - /** - * Atomically sets the element at position {@code i} to the given - * value and returns the old value. - * - * @param i the index - * @param newValue the new value - * @return the previous value - */ - public final native int getAndSet(int i, int newValue); - - /** - * Atomically sets the element at position {@code i} to the given - * updated value if the current value {@code ==} the expected value. - * - * @param i the index - * @param expect the expected value - * @param update the new value - * @return true if successful. False return indicates that - * the actual value was not equal to the expected value. - */ - public final native boolean compareAndSet(int i, int expect, int update); - - /** - * Atomically sets the element at position {@code i} to the given - * updated value if the current value {@code ==} the expected value. - * - * <p>May <a href="package-summary.html#Spurious">fail spuriously</a> - * and does not provide ordering guarantees, so is only rarely an - * appropriate alternative to {@code compareAndSet}. - * - * @param i the index - * @param expect the expected value - * @param update the new value - * @return true if successful. - */ - public final boolean weakCompareAndSet(int i, int expect, int update) { - return compareAndSet(i, expect, update); - } - - /** - * Atomically increments by one the element at index {@code i}. - * - * @param i the index - * @return the previous value - */ - public final int getAndIncrement(int i) { - return incrementAndGet(i) - 1; - } - - /** - * Atomically decrements by one the element at index {@code i}. - * - * @param i the index - * @return the previous value - */ - public final int getAndDecrement(int i) { - return decrementAndGet(i) + 1; - } - - /** - * Atomically adds the given value to the element at index {@code i}. - * - * @param i the index - * @param delta the value to add - * @return the previous value - */ - public final int getAndAdd(int i, int delta) { - return addAndGet(i, delta) - delta; - } - - /** - * Atomically increments by one the element at index {@code i}. - * - * @param i the index - * @return the updated value - */ - public final native int incrementAndGet(int i); - - /** - * Atomically decrements by one the element at index {@code i}. - * - * @param i the index - * @return the updated value - */ - public final native int decrementAndGet(int i); - - /** - * Atomically adds the given value to the element at index {@code i}. - * - * @param i the index - * @param delta the value to add - * @return the updated value - */ - public final native int addAndGet(int i, int delta); - - /** - * Returns the String representation of the current values of array. - * @return the String representation of the current values of array. - */ - public String toString() { - int iMax = array.length - 1; - if (iMax == -1) - return "[]"; - - StringBuilder b = new StringBuilder(); - b.append('['); - for (int i = 0; ; i++) { - b.append(get(i)); - if (i == iMax) - return b.append(']').toString(); - b.append(',').append(' '); - } - } - -} |