compact1, compact2, compact3

java.util.concurrent.atomic

Class AtomicLongFieldUpdater<T>

java.lang.Object

java.util.concurrent.atomic.AtomicLongFieldUpdater<T>

Type Parameters:

T - The type of the object holding the updatable field

public abstract class AtomicLongFieldUpdater<T>
extends Object

A reflection-based utility that enables atomic updates to designated volatile long fields of designated classes. This class is designed for use in atomic data structures in which several fields of the same node are independently subject to atomic updates.

Note that the guarantees of the compareAndSet method in this class are weaker than in other atomic classes. Because this class cannot ensure that all uses of the field are appropriate for purposes of atomic access, it can guarantee atomicity only with respect to other invocations of compareAndSet and set on the same updater.

Since:

1.5

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AtomicLongFieldUpdater()	Protected do-nothing constructor for use by subclasses.

Method Summary

Modifier and Type	Method	Description
long	accumulateAndGet(T obj, long x, LongBinaryOperator accumulatorFunction)	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.
long	addAndGet(T obj, long delta)	Atomically adds the given value to the current value of the field of the given object managed by this updater.
abstract boolean	compareAndSet(T obj, long expect, long update)	Atomically sets the field of the given object managed by this updater to the given updated value if the current value == the expected value.
long	decrementAndGet(T obj)	Atomically decrements by one the current value of the field of the given object managed by this updater.
abstract long	get(T obj)	Gets the current value held in the field of the given object managed by this updater.
long	getAndAccumulate(T obj, long x, LongBinaryOperator accumulatorFunction)	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.
long	getAndAdd(T obj, long delta)	Atomically adds the given value to the current value of the field of the given object managed by this updater.
long	getAndDecrement(T obj)	Atomically decrements by one the current value of the field of the given object managed by this updater.
long	getAndIncrement(T obj)	Atomically increments by one the current value of the field of the given object managed by this updater.
long	getAndSet(T obj, long newValue)	Atomically sets the field of the given object managed by this updater to the given value and returns the old value.
long	getAndUpdate(T obj, LongUnaryOperator updateFunction)	Atomically updates the field of the given object managed by this updater with the results of applying the given function, returning the previous value.
long	incrementAndGet(