V
 The type of object referred to by this referencepublic class AtomicMarkableReference<V> extends Object
AtomicMarkableReference
maintains an object reference
along with a mark bit, that can be updated atomically.
Implementation note: This implementation maintains markable references by creating internal objects representing "boxed" [reference, boolean] pairs.
Constructor and Description 

AtomicMarkableReference(V initialRef,
boolean initialMark)
Creates a new
AtomicMarkableReference with the given
initial values. 
Modifier and Type  Method and Description 

boolean 
attemptMark(V expectedReference,
boolean newMark)
Atomically sets the value of the mark to the given update value
if the current reference is
== to the expected
reference. 
boolean 
compareAndSet(V expectedReference,
V newReference,
boolean expectedMark,
boolean newMark)
Atomically sets the value of both the reference and mark
to the given update values if the
current reference is
== to the expected reference
and the current mark is equal to the expected mark. 
V 
get(boolean[] markHolder)
Returns the current values of both the reference and the mark.

V 
getReference()
Returns the current value of the reference.

boolean 
isMarked()
Returns the current value of the mark.

void 
set(V newReference,
boolean newMark)
Unconditionally sets the value of both the reference and mark.

boolean 
weakCompareAndSet(V expectedReference,
V newReference,
boolean expectedMark,
boolean newMark)
Atomically sets the value of both the reference and mark
to the given update values if the
current reference is
== to the expected reference
and the current mark is equal to the expected mark. 
public AtomicMarkableReference(V initialRef, boolean initialMark)
AtomicMarkableReference
with the given
initial values.initialRef
 the initial referenceinitialMark
 the initial markpublic V getReference()
public boolean isMarked()
public V get(boolean[] markHolder)
boolean[1] holder; ref = v.get(holder);
.markHolder
 an array of size of at least one. On return,
markholder[0]
will hold the value of the mark.public boolean weakCompareAndSet(V expectedReference, V newReference, boolean expectedMark, boolean newMark)
==
to the expected reference
and the current mark is equal to the expected mark.
May fail spuriously
and does not provide ordering guarantees, so is only rarely an
appropriate alternative to compareAndSet
.
expectedReference
 the expected value of the referencenewReference
 the new value for the referenceexpectedMark
 the expected value of the marknewMark
 the new value for the markpublic boolean compareAndSet(V expectedReference, V newReference, boolean expectedMark, boolean newMark)
==
to the expected reference
and the current mark is equal to the expected mark.expectedReference
 the expected value of the referencenewReference
 the new value for the referenceexpectedMark
 the expected value of the marknewMark
 the new value for the markpublic void set(V newReference, boolean newMark)
newReference
 the new value for the referencenewMark
 the new value for the markpublic boolean attemptMark(V expectedReference, boolean newMark)
==
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.expectedReference
 the expected value of the referencenewMark
 the new value for the mark