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Diffstat (limited to 'classpath/java/util/concurrent/atomic/AtomicLong.java')
| -rw-r--r-- | classpath/java/util/concurrent/atomic/AtomicLong.java | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/classpath/java/util/concurrent/atomic/AtomicLong.java b/classpath/java/util/concurrent/atomic/AtomicLong.java deleted file mode 100644 index f8e5c19d..00000000 --- a/classpath/java/util/concurrent/atomic/AtomicLong.java +++ /dev/null @@ -1,217 +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; - -/** - * A {@code long} value that may be updated atomically. See the - * {@link java.util.concurrent.atomic} package specification for - * description of the properties of atomic variables. An - * {@code AtomicLong} is used in applications such as atomically - * incremented sequence numbers, and cannot be used as a replacement - * for a {@link java.lang.Long}. However, this class does extend - * {@code Number} to allow uniform access by tools and utilities that - * deal with numerically-based classes. - * - * @since 1.5 - * @author Doug Lea - */ -public class AtomicLong extends Number implements java.io.Serializable { - private static final long serialVersionUID = 1927816293512124184L; - - /** - * Records whether the underlying JVM supports lockless - * compareAndSwap for longs. While the Unsafe.compareAndSwapLong - * method works in either case, some constructions should be - * handled at Java level to avoid locking user-visible locks. - */ - static final boolean VM_SUPPORTS_LONG_CAS = false; - - private volatile long value; - - /** - * Creates a new AtomicLong with the given initial value. - * - * @param initialValue the initial value - */ - public AtomicLong(long initialValue) { - value = initialValue; - } - - /** - * Creates a new AtomicLong with initial value {@code 0}. - */ - public AtomicLong() { - } - - /** - * Gets the current value. - * - * @return the current value - */ - public final long get() { - return value; - } - - /** - * Sets to the given value. - * - * @param newValue the new value - */ - public final void set(long newValue) { - value = newValue; - } - - /** - * Eventually sets to the given value. - * - * @param newValue the new value - * @since 1.6 - */ - public final void lazySet(long newValue) { - value = newValue; - } - - /** - * Atomically sets to the given value and returns the old value. - * - * @param newValue the new value - * @return the previous value - */ - public final native long getAndSet(long newValue); - - /** - * Atomically sets the value to the given updated value - * if the current value {@code ==} the expected value. - * - * @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(long expect, long update); - - /** - * Atomically sets the value 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 expect the expected value - * @param update the new value - * @return true if successful. - */ - public final boolean weakCompareAndSet(long expect, long update) { - return compareAndSet(expect, update); - } - - /** - * Atomically increments by one the current value. - * - * @return the previous value - */ - public final long getAndIncrement() { - return incrementAndGet() - 1; - } - - /** - * Atomically decrements by one the current value. - * - * @return the previous value - */ - public final long getAndDecrement() { - return decrementAndGet() + 1; - } - - /** - * Atomically adds the given value to the current value. - * - * @param delta the value to add - * @return the previous value - */ - public final long getAndAdd(long delta) { - return addAndGet(delta) - delta; - } - - /** - * Atomically increments by one the current value. - * - * @return the updated value - */ - public final native long incrementAndGet(); - - /** - * Atomically decrements by one the current value. - * - * @return the updated value - */ - public final native long decrementAndGet(); - - /** - * Atomically adds the given value to the current value. - * - * @param delta the value to add - * @return the updated value - */ - public final native long addAndGet(long delta); - - /** - * Returns the String representation of the current value. - * @return the String representation of the current value. - */ - public String toString() { - return Long.toString(get()); - } - - - public int intValue() { - return (int)get(); - } - - public long longValue() { - return get(); - } - - public float floatValue() { - return (float)get(); - } - - public double doubleValue() { - return (double)get(); - } - -} |