Package com.oracle.coherence.concurrent.atomic

Class LocalAtomicStampedReference<V>

java.lang.Object

com.oracle.coherence.concurrent.atomic.LocalAtomicStampedReference<V>

Type Parameters:

V - the type of object referred to by this reference

All Implemented Interfaces:

AtomicStampedReference<V>

public class LocalAtomicStampedReference<V>
extends Object
implements AtomicStampedReference<V>

Local implementation of AtomicStampedReference interface, that simply wraps java.util.concurrent.atomic.AtomicStampedReference instance.

Since:

21.06

Author:

Aleks Seovic 2020.12.09

Nested Class Summary

Nested classes/interfaces inherited from interface com.oracle.coherence.concurrent.atomic.AtomicStampedReference

AtomicStampedReference.Serializer<V>

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	LocalAtomicStampedReference(AtomicStampedReference<V> value)	Construct LocalAtomicStampedReference<V> instance.
protected	LocalAtomicStampedReference(V value, int nInitialStamp)	Construct LocalAtomicStampedReference<V> instance.

Method Summary

Modifier and Type	Method	Description
AsyncLocalAtomicStampedReference<V>	async()	Return non-blocking API for this atomic reference.
boolean	attemptStamp(V expectedReference, int nNewStamp)	Atomically sets the value of the stamp to the given update value if the current reference is == to the expected reference.
boolean	compareAndSet(V expectedReference, V newReference, int nExpectedStamp, int nNewStamp)	Atomically sets the value of both the reference and stamp to the given update values if the current reference is == to the expected reference and the current stamp is equal to the expected stamp.
V	get(int[] iaStampHolder)	Returns the current values of both the reference and the stamp.
V	getReference()	Returns the current value of the reference.
int	getStamp()	Returns the current value of the stamp.
void	set(V newReference, int nNewStamp)	Unconditionally sets the value of both the reference and stamp.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LocalAtomicStampedReference

protected LocalAtomicStampedReference(V value,
                                      int nInitialStamp)

Construct LocalAtomicStampedReference<V> instance.

Parameters:

value - initial value

nInitialStamp - initial stamp

LocalAtomicStampedReference

protected LocalAtomicStampedReference(AtomicStampedReference<V> value)

Construct LocalAtomicStampedReference<V> instance.

Parameters:

value - wrapped value

Method Detail

async

public AsyncLocalAtomicStampedReference<V> async()

Description copied from interface: AtomicStampedReference

Return non-blocking API for this atomic reference.

Specified by:

async in interface AtomicStampedReference<V>

Returns:

non-blocking API for this atomic reference

getReference

public V getReference()

Description copied from interface: AtomicStampedReference

Returns the current value of the reference.

Specified by:

getReference in interface AtomicStampedReference<V>

Returns:

the current value of the reference

getStamp

public int getStamp()

Description copied from interface: AtomicStampedReference

Returns the current value of the stamp.

Specified by:

getStamp in interface AtomicStampedReference<V>

Returns:

the current value of the stamp

get

public V get(int[] iaStampHolder)

Description copied from interface: AtomicStampedReference

Returns the current values of both the reference and the stamp. Typical usage is int[1] holder; ref = v.get(holder); .

Specified by:

get in interface AtomicStampedReference<V>

Parameters:

iaStampHolder - an array of size of at least one. On return, stampHolder[0] will hold the value of the stamp.

Returns:

the current value of the reference

compareAndSet

public boolean compareAndSet(V expectedReference,
                             V newReference,
                             int nExpectedStamp,
                             int nNewStamp)

Description copied from interface: AtomicStampedReference

Atomically sets the value of both the reference and stamp to the given update values if the current reference is == to the expected reference and the current stamp is equal to the expected stamp.

Specified by:

compareAndSet in interface AtomicStampedReference<V>

Parameters:

expectedReference - the expected value of the reference

newReference - the new value for the reference

nExpectedStamp - the expected value of the stamp

nNewStamp - the new value for the stamp

Returns:

true if successful

set

public void set(V newReference,
                int nNewStamp)

Description copied from interface: AtomicStampedReference

Unconditionally sets the value of both the reference and stamp.

Specified by:

set in interface AtomicStampedReference<V>

Parameters:

newReference - the new value for the reference

nNewStamp - the new value for the stamp

attemptStamp

public boolean attemptStamp(V expectedReference,
                            int nNewStamp)

Description copied from interface: AtomicStampedReference

Atomically sets the value of the stamp to the given update value if the current reference is == to the expected reference. Any given invocation of this operation may fail (return false) spuriously, but repeated invocation when the current value holds the expected value and no other thread is also attempting to set the value will eventually succeed.

Specified by:

attemptStamp in interface AtomicStampedReference<V>

Parameters:

expectedReference - the expected value of the reference

nNewStamp - the new value for the stamp

Returns:

true if successful

toString

public String toString()

Overrides:

toString in class Object