Package Summary  Overview Summary

class:AtomicReference [CHANGED]
  • Type Parameters:
    V - The type of object referred to by this reference
    All Implemented Interfaces:
    Serializable 

    public class AtomicReference<V>
extends Object
implements Serializable
    An object reference that may be updated atomically. See the java.util.concurrent.atomic packageVarHandle specification for descriptiondescriptions of the properties of atomic variablesaccesses.
    Since:
    1.5
    See Also:
    Serialized Form
  • Type Parameters:
    V - The type of object referred to by this reference
    All Implemented Interfaces:
    Serializable 

    public class AtomicReference<V>
extends Object
implements Serializable
    An object reference that may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables.
    Since:
    1.5
    See Also:
    Serialized Form
  • Type Parameters:
    V - The type of object referred to by this reference
    All Implemented Interfaces:
    Serializable 

    public class AtomicReference<V>
extends Object
implements Serializable
    An object reference that may be updated atomically. See the VarHandle specification for descriptions of the properties of atomic accesses.
    Since:
    1.5
    See Also:
    Serialized Form

constructor:AtomicReference(V) [NONE]

  • AtomicReference

    public AtomicReference(V initialValue)
    Creates a new AtomicReference with the given initial value.
    Parameters:
    initialValue - the initial value

constructor:AtomicReference() [NONE]

  • AtomicReference

    public AtomicReference()
    Creates a new AtomicReference with null initial value.

method:get() [CHANGED]

  • get

    public final V get()
    Gets the current value.
    Returns:
    the current value

method:set(V) [CHANGED]

  • set

    public final void set(V newValue)
    Sets to the given value.
    Parameters:
    newValue - the new value

method:lazySet(V) [CHANGED]

  • lazySet

    public final void lazySet(V newValue)
    Eventually sets toSets the givenvalue to newValue, with memory effects as specified by VarHandle.setRelease(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    1.6

  • lazySet

    public final void lazySet(V newValue)
    Eventually sets to the given value.
    Parameters:
    newValue - the new value
    Since:
    1.6

method:compareAndSet(V, V) [CHANGED]

  • compareAndSet

    public final boolean compareAndSet(V expect expectedValue,
                                   V update newValue)
    Atomically sets the value to the given updated valuenewValue if the current value == the expected valueexpectedValue , with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...).
    Parameters:
    expectexpectedValue - the expected value
    updatenewValue - the new value
    Returns:
    true if successful. False return indicates that the actual value was not equal to the expected value.

  • compareAndSet

    public final boolean compareAndSet(V expect,
                                   V update)
    Atomically sets the value to the given updated value if the current value == the expected value.
    Parameters:
    expect - the expected value
    update - the new value
    Returns:
    true if successful. False return indicates that the actual value was not equal to the expected value.

  • compareAndSet

    public final boolean compareAndSet(V expectedValue,
                                   V newValue)
    Atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful. False return indicates that the actual value was not equal to the expected value.

method:weakCompareAndSet(V, V) [CHANGED]

  • weakCompareAndSet

    public final boolean weakCompareAndSet(V expect,
                                       V update)
    Atomically sets the value to the given updated value if the current value == the expected value.

    May fail spuriously and does not provide ordering guarantees , so is only rarely an appropriate alternative to compareAndSet.

    Parameters:
    expect - the expected value
    update - the new value
    Returns:
    true if successful

method:weakCompareAndSetPlain(V, V) [ADDED]

  • weakCompareAndSetPlain 

    public final boolean weakCompareAndSetPlain(V expectedValue,
                                            V newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetPlain(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:getAndSet(V) [CHANGED]

  • getAndSet

    public final V getAndSet(V newValue)
    Atomically sets tothe givenvalue to newValue and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...).
    Parameters:
    newValue - the new value
    Returns:
    the previous value

  • getAndSet

    public final V getAndSet(V newValue)
    Atomically sets to the given value and returns the old value.
    Parameters:
    newValue - the new value
    Returns:
    the previous value

  • getAndSet

    public final V getAndSet(V newValue)
    Atomically sets the value to newValue and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...).
    Parameters:
    newValue - the new value
    Returns:
    the previous value

method:getAndUpdate(java.util.function.UnaryOperator) [NONE]

  • getAndUpdate

    public final V getAndUpdate(UnaryOperator<V> updateFunction)
    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.
    Parameters:
    updateFunction - a side-effect-free function
    Returns:
    the previous value
    Since:
    1.8

method:updateAndGet(java.util.function.UnaryOperator) [NONE]

  • updateAndGet

    public final V updateAndGet(UnaryOperator<V> updateFunction)
    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.
    Parameters:
    updateFunction - a side-effect-free function
    Returns:
    the updated value
    Since:
    1.8

method:getAndAccumulate(V, java.util.function.BinaryOperator) [NONE]

  • getAndAccumulate

    public final V getAndAccumulate(V x,
                                BinaryOperator<V> accumulatorFunction)
    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.
    Parameters:
    x - the update value
    accumulatorFunction - a side-effect-free function of two arguments
    Returns:
    the previous value
    Since:
    1.8

method:accumulateAndGet(V, java.util.function.BinaryOperator) [NONE]

  • accumulateAndGet

    public final V accumulateAndGet(V x,
                                BinaryOperator<V> accumulatorFunction)
    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.
    Parameters:
    x - the update value
    accumulatorFunction - a side-effect-free function of two arguments
    Returns:
    the updated value
    Since:
    1.8

method:toString() [NONE]

  • toString

    public String toString()
    Returns the String representation of the current value.
    Overrides:
    toString in class Object
    Returns:
    the String representation of the current value

method:getPlain() [ADDED]

  • getPlain 

    public final V getPlain()
    Returns the current value, with memory semantics of reading as if the variable was declared non-volatile.
    Returns:
    the value
    Since:
    9

method:setPlain(V) [ADDED]

  • setPlain 

    public final void setPlain(V newValue)
    Sets the value to newValue, with memory semantics of setting as if the variable was declared non-volatile and non-final.
    Parameters:
    newValue - the new value
    Since:
    9

method:getOpaque() [ADDED]

method:setOpaque(V) [ADDED]

  • setOpaque 

    public final void setOpaque(V newValue)
    Sets the value to newValue, with memory effects as specified by VarHandle.setOpaque(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    9

method:getAcquire() [ADDED]

method:setRelease(V) [ADDED]

method:compareAndExchange(V, V) [ADDED]

  • compareAndExchange 

    public final V compareAndExchange(V expectedValue,
                                  V newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchange(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:compareAndExchangeAcquire(V, V) [ADDED]

  • compareAndExchangeAcquire 

    public final V compareAndExchangeAcquire(V expectedValue,
                                         V newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeAcquire(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:compareAndExchangeRelease(V, V) [ADDED]

  • compareAndExchangeRelease 

    public final V compareAndExchangeRelease(V expectedValue,
                                         V newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeRelease(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:weakCompareAndSetVolatile(V, V) [ADDED]

  • weakCompareAndSetVolatile 

    public final boolean weakCompareAndSetVolatile(V expectedValue,
                                               V newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSet(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:weakCompareAndSetAcquire(V, V) [ADDED]

  • weakCompareAndSetAcquire 

    public final boolean weakCompareAndSetAcquire(V expectedValue,
                                              V newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetAcquire(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:weakCompareAndSetRelease(V, V) [ADDED]

  • weakCompareAndSetRelease 

    public final boolean weakCompareAndSetRelease(V expectedValue,
                                              V newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetRelease(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

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