edu.emory.mathcs.backport.java.util.concurrent.atomic
public class AtomicLongArray extends java.lang.Object implements java.io.Serializable
long
array in which elements may be updated atomically.
See the edu.emory.mathcs.backport.java.util.concurrent.atomic
package specification
for description of the properties of atomic variables.Constructor and Description |
---|
AtomicLongArray(int length)
Creates a new AtomicLongArray of given length.
|
AtomicLongArray(long[] array)
Creates a new AtomicLongArray with the same length as, and
all elements copied from, the given array.
|
Modifier and Type | Method and Description |
---|---|
long |
addAndGet(int i,
long delta)
Atomically adds the given value to the element at index
i . |
boolean |
compareAndSet(int i,
long expect,
long update)
Atomically sets the value to the given updated value
if the current value
== the expected value. |
long |
decrementAndGet(int i)
Atomically decrements by one the element at index
i . |
long |
get(int i)
Gets the current value at position
i . |
long |
getAndAdd(int i,
long delta)
Atomically adds the given value to the element at index
i . |
long |
getAndDecrement(int i)
Atomically decrements by one the element at index
i . |
long |
getAndIncrement(int i)
Atomically increments by one the element at index
i . |
long |
getAndSet(int i,
long newValue)
Atomically sets the element at position
i to the given value
and returns the old value. |
long |
incrementAndGet(int i)
Atomically increments by one the element at index
i . |
void |
lazySet(int i,
long newValue)
Eventually sets the element at position
i to the given value. |
int |
length()
Returns the length of the array.
|
void |
set(int i,
long newValue)
Sets the element at position
i to the given value. |
java.lang.String |
toString()
Returns the String representation of the current values of array.
|
boolean |
weakCompareAndSet(int i,
long expect,
long update)
if the current value
== the expected value. |
public AtomicLongArray(int length)
length
- the length of the arraypublic AtomicLongArray(long[] array)
array
- the array to copy elements fromjava.lang.NullPointerException
- if array is nullpublic final int length()
public final long get(int i)
i
.i
- the indexpublic final void set(int i, long newValue)
i
to the given value.i
- the indexnewValue
- the new valuepublic final void lazySet(int i, long newValue)
i
to the given value.i
- the indexnewValue
- the new valuepublic final long getAndSet(int i, long newValue)
i
to the given value
and returns the old value.i
- the indexnewValue
- the new valuepublic final boolean compareAndSet(int i, long expect, long update)
==
the expected value.i
- the indexexpect
- the expected valueupdate
- the new valuepublic final boolean weakCompareAndSet(int i, long expect, long update)
==
the expected value.
May fail spuriously
and does not provide ordering guarantees, so is only rarely an
appropriate alternative to compareAndSet
.
i
- the indexexpect
- the expected valueupdate
- the new valuepublic final long getAndIncrement(int i)
i
.i
- the indexpublic final long getAndDecrement(int i)
i
.i
- the indexpublic final long getAndAdd(int i, long delta)
i
.i
- the indexdelta
- the value to addpublic final long incrementAndGet(int i)
i
.i
- the indexpublic final long decrementAndGet(int i)
i
.i
- the indexpublic long addAndGet(int i, long delta)
i
.i
- the indexdelta
- the value to addpublic java.lang.String toString()
toString
in class java.lang.Object