|
Préférences
Moteurs de recherche
|
||||||||||||||||||||||
JavaTM 2 Platform Std. Ed. v1.6.0
java.util.concurrent.atomic
|
Constructor Summary | |
---|---|
AtomicMarkableReference(V initialRef,
boolean initialMark)
Creates a new AtomicMarkableReference with the given
initial values. |
Method Summary | |
---|---|
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. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public AtomicMarkableReference(V initialRef, boolean initialMark)
AtomicMarkableReference
with the given
initial values.
initialRef
- the initial referenceinitialMark
- the initial markMethod Detail |
---|
public 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 mark
public 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 mark
public 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