changeset 6396:a546d8897e0d

8001666: Add lambda-compatible atomics and accumulators to the ActomicXXX classes Reviewed-by: dl, chegar, darcy, goetz Contributed-by: dl@cs.oswego.edu, chris.hegarty@oracle.com
author dl
date Wed, 16 Jan 2013 12:09:35 +0000
parents 9d8ef6174cfd
children c7d54f93d3e5
files src/share/classes/java/util/concurrent/atomic/AtomicInteger.java src/share/classes/java/util/concurrent/atomic/AtomicIntegerArray.java src/share/classes/java/util/concurrent/atomic/AtomicIntegerFieldUpdater.java src/share/classes/java/util/concurrent/atomic/AtomicLong.java src/share/classes/java/util/concurrent/atomic/AtomicLongArray.java src/share/classes/java/util/concurrent/atomic/AtomicLongFieldUpdater.java src/share/classes/java/util/concurrent/atomic/AtomicReference.java src/share/classes/java/util/concurrent/atomic/AtomicReferenceArray.java src/share/classes/java/util/concurrent/atomic/AtomicReferenceFieldUpdater.java
diffstat 9 files changed, 828 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/classes/java/util/concurrent/atomic/AtomicInteger.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicInteger.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.IntUnaryOperator;
+import java.util.function.IntBinaryOperator;
 import sun.misc.Unsafe;
 
 /**
@@ -204,6 +206,92 @@
     }
 
     /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndUpdate(IntUnaryOperator updateFunction) {
+        int prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int updateAndGet(IntUnaryOperator updateFunction) {
+        int prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the previous value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndAccumulate(int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        int prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the updated value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int accumulateAndGet(int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        int prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
      * Returns the String representation of the current value.
      * @return the String representation of the current value
      */
--- a/src/share/classes/java/util/concurrent/atomic/AtomicIntegerArray.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicIntegerArray.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.IntUnaryOperator;
+import java.util.function.IntBinaryOperator;
 import sun.misc.Unsafe;
 
 /**
@@ -246,6 +248,100 @@
     }
 
     /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndUpdate(int i, IntUnaryOperator updateFunction) {
+        long offset = checkedByteOffset(i);
+        int prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int updateAndGet(int i, IntUnaryOperator updateFunction) {
+        long offset = checkedByteOffset(i);
+        int prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the previous value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndAccumulate(int i, int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        int prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the updated value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int accumulateAndGet(int i, int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        int prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
+    /**
      * Returns the String representation of the current values of array.
      * @return the String representation of the current values of array
      */
--- a/src/share/classes/java/util/concurrent/atomic/AtomicIntegerFieldUpdater.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicIntegerFieldUpdater.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.IntUnaryOperator;
+import java.util.function.IntBinaryOperator;
 import sun.misc.Unsafe;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
@@ -265,6 +267,96 @@
     }
 
     /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the previous
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndUpdate(T obj, IntUnaryOperator updateFunction) {
+        int prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the updated
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int updateAndGet(T obj, IntUnaryOperator updateFunction) {
+        int prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operateAsInt(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final int getAndAccumulate(T obj, int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        int prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final int accumulateAndGet(T obj, int x,
+                                      IntBinaryOperator accumulatorFunction) {
+        int prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operateAsInt(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
+    /**
      * Standard hotspot implementation using intrinsics
      */
     private static class AtomicIntegerFieldUpdaterImpl<T> extends AtomicIntegerFieldUpdater<T> {
--- a/src/share/classes/java/util/concurrent/atomic/AtomicLong.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicLong.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.LongUnaryOperator;
+import java.util.function.LongBinaryOperator;
 import sun.misc.Unsafe;
 
 /**
@@ -218,6 +220,92 @@
     }
 
     /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndUpdate(LongUnaryOperator updateFunction) {
+        long prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long updateAndGet(LongUnaryOperator updateFunction) {
+        long prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the previous value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndAccumulate(long x,
+                                       LongBinaryOperator accumulatorFunction) {
+        long prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the updated value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long accumulateAndGet(long x,
+                                       LongBinaryOperator accumulatorFunction) {
+        long prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
      * Returns the String representation of the current value.
      * @return the String representation of the current value
      */
--- a/src/share/classes/java/util/concurrent/atomic/AtomicLongArray.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicLongArray.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.LongUnaryOperator;
+import java.util.function.LongBinaryOperator;
 import sun.misc.Unsafe;
 
 /**
@@ -245,6 +247,100 @@
     }
 
     /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndUpdate(int i, LongUnaryOperator updateFunction) {
+        long offset = checkedByteOffset(i);
+        long prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long updateAndGet(int i, LongUnaryOperator updateFunction) {
+        long offset = checkedByteOffset(i);
+        long prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the previous value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndAccumulate(int i, int x,
+                                      LongBinaryOperator accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        long prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the updated value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long accumulateAndGet(int i, int x,
+                                      LongBinaryOperator accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        long prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
+    /**
      * Returns the String representation of the current values of array.
      * @return the String representation of the current values of array
      */
--- a/src/share/classes/java/util/concurrent/atomic/AtomicLongFieldUpdater.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicLongFieldUpdater.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.LongUnaryOperator;
+import java.util.function.LongBinaryOperator;
 import sun.misc.Unsafe;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
@@ -267,6 +269,96 @@
         return next;
     }
 
+    /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the previous
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndUpdate(T obj, LongUnaryOperator updateFunction) {
+        long prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the updated
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long updateAndGet(T obj, LongUnaryOperator updateFunction) {
+        long prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operateAsLong(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final long getAndAccumulate(T obj, long x,
+                                       LongBinaryOperator accumulatorFunction) {
+        long prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final long accumulateAndGet(T obj, long x,
+                                       LongBinaryOperator accumulatorFunction) {
+        long prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operateAsLong(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
     private static class CASUpdater<T> extends AtomicLongFieldUpdater<T> {
         private static final Unsafe unsafe = Unsafe.getUnsafe();
         private final long offset;
--- a/src/share/classes/java/util/concurrent/atomic/AtomicReference.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicReference.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.UnaryOperator;
+import java.util.function.BinaryOperator;
 import sun.misc.Unsafe;
 
 /**
@@ -142,6 +144,92 @@
     }
 
     /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final V getAndUpdate(UnaryOperator<V> updateFunction) {
+        V prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operate(prev);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final V updateAndGet(UnaryOperator<V> updateFunction) {
+        V prev, next;
+        do {
+            prev = get();
+            next = updateFunction.operate(prev);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the previous value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final V getAndAccumulate(V x,
+                                    BinaryOperator<V> accumulatorFunction) {
+        V prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSet(prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the current value with the results of
+     * applying the given function to the current and given values,
+     * returning the updated value. The function should be
+     * side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function
+     * is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final V accumulateAndGet(V x,
+                                    BinaryOperator<V> accumulatorFunction) {
+        V prev, next;
+        do {
+            prev = get();
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSet(prev, next));
+        return next;
+    }
+
+    /**
      * Returns the String representation of the current value.
      * @return the String representation of the current value
      */
--- a/src/share/classes/java/util/concurrent/atomic/AtomicReferenceArray.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicReferenceArray.java	Wed Jan 16 12:09:35 2013 +0000
@@ -36,6 +36,8 @@
 package java.util.concurrent.atomic;
 
 import java.util.Arrays;
+import java.util.function.UnaryOperator;
+import java.util.function.BinaryOperator;
 import java.lang.reflect.Array;
 import sun.misc.Unsafe;
 
@@ -199,6 +201,100 @@
         return compareAndSet(i, expect, update);
     }
 
+      /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final E getAndUpdate(int i, UnaryOperator<E> updateFunction) {
+        long offset = checkedByteOffset(i);
+        E prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operate(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the results
+     * of applying the given function, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.
+     *
+     * @param i the index
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final E updateAndGet(int i, UnaryOperator<E> updateFunction) {
+        long offset = checkedByteOffset(i);
+        E prev, next;
+        do {
+            prev = getRaw(offset);
+            next = updateFunction.operate(prev);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the previous value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final E getAndAccumulate(int i, E x,
+                                    BinaryOperator<E> accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        E prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the element at index {@code i} with the
+     * results of applying the given function to the current and
+     * given values, returning the updated value. The function should
+     * be side-effect-free, since it may be re-applied when attempted
+     * updates fail due to contention among threads.  The function is
+     * applied with the current value at index {@code i} as its first
+     * argument, and the given update as the second argument.
+     *
+     * @param i the index
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final E accumulateAndGet(int i, E x,
+                                    BinaryOperator<E> accumulatorFunction) {
+        long offset = checkedByteOffset(i);
+        E prev, next;
+        do {
+            prev = getRaw(offset);
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSetRaw(offset, prev, next));
+        return next;
+    }
+
     /**
      * Returns the String representation of the current values of array.
      * @return the String representation of the current values of array
--- a/src/share/classes/java/util/concurrent/atomic/AtomicReferenceFieldUpdater.java	Wed Jan 16 10:14:09 2013 +0000
+++ b/src/share/classes/java/util/concurrent/atomic/AtomicReferenceFieldUpdater.java	Wed Jan 16 12:09:35 2013 +0000
@@ -34,6 +34,8 @@
  */
 
 package java.util.concurrent.atomic;
+import java.util.function.UnaryOperator;
+import java.util.function.BinaryOperator;
 import sun.misc.Unsafe;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
@@ -183,6 +185,96 @@
         return prev;
     }
 
+    /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the previous
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the previous value
+     * @since 1.8
+     */
+    public final V getAndUpdate(T obj, UnaryOperator<V> updateFunction) {
+        V prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operate(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this updater
+     * with the results of applying the given function, returning the updated
+     * value. The function should be side-effect-free, since it may be
+     * re-applied when attempted updates fail due to contention among threads.
+     *
+     * @param obj An object whose field to get and set
+     * @param updateFunction a side-effect-free function
+     * @return the updated value
+     * @since 1.8
+     */
+    public final V updateAndGet(T obj, UnaryOperator<V> updateFunction) {
+        V prev, next;
+        do {
+            prev = get(obj);
+            next = updateFunction.operate(prev);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the previous value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the previous value
+     * @since 1.8
+     */
+    public final V getAndAccumulate(T obj, V x,
+                                    BinaryOperator<V> accumulatorFunction) {
+        V prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return prev;
+    }
+
+    /**
+     * Atomically updates the field of the given object managed by this
+     * updater with the results of applying the given function to the
+     * current and given values, returning the updated value. The
+     * function should be side-effect-free, since it may be re-applied
+     * when attempted updates fail due to contention among threads.  The
+     * function is applied with the current value as its first argument,
+     * and the given update as the second argument.
+     *
+     * @param obj An object whose field to get and set
+     * @param x the update value
+     * @param accumulatorFunction a side-effect-free function of two arguments
+     * @return the updated value
+     * @since 1.8
+     */
+    public final V accumulateAndGet(T obj, V x,
+                                    BinaryOperator<V> accumulatorFunction) {
+        V prev, next;
+        do {
+            prev = get(obj);
+            next = accumulatorFunction.operate(prev, x);
+        } while (!compareAndSet(obj, prev, next));
+        return next;
+    }
+
     private static final class AtomicReferenceFieldUpdaterImpl<T,V>
         extends AtomicReferenceFieldUpdater<T,V> {
         private static final Unsafe unsafe = Unsafe.getUnsafe();