Serializable
public class AtomicLongArray extends Object implements Serializable
long
array in which elements may be updated atomically. See the VarHandle
specification for descriptions of the properties of atomic accesses.Constructor | Description |
---|---|
AtomicLongArray |
Creates a new AtomicLongArray of the given length, with all elements initially zero. |
AtomicLongArray |
Creates a new AtomicLongArray with the same length as, and all elements copied from, the given array. |
Modifier and Type | Method | Description |
---|---|---|
final long |
accumulateAndGet |
Atomically updates (with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...) ) the element at index i with the results of applying the given function to the current and given values, returning the updated value. |
long |
addAndGet |
Atomically adds the given value to the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final long |
compareAndExchange |
Atomically sets the element at index i to newValue if the element's current value, referred to as the witness value, == expectedValue , with memory effects as specified by VarHandle.compareAndExchange(java.lang.Object...) . |
final long |
compareAndExchangeAcquire |
Atomically sets the element at index i to newValue if the element's current value, referred to as the witness value, == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeAcquire(java.lang.Object...) . |
final long |
compareAndExchangeRelease |
Atomically sets the element at index i to newValue if the element's current value, referred to as the witness value, == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeRelease(java.lang.Object...) . |
final boolean |
compareAndSet |
Atomically sets the element at index i to newValue if the element's current value == expectedValue , with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...) . |
final long |
decrementAndGet |
Atomically decrements the value of the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final long |
get |
Returns the current value of the element at index i , with memory effects as specified by VarHandle.getVolatile(java.lang.Object...) . |
final long |
getAcquire |
Returns the current value of the element at index i , with memory effects as specified by VarHandle.getAcquire(java.lang.Object...) . |
final long |
getAndAccumulate |
Atomically updates (with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...) ) the element at index i with the results of applying the given function to the current and given values, returning the previous value. |
final long |
getAndAdd |
Atomically adds the given value to the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final long |
getAndDecrement |
Atomically decrements the value of the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final long |
getAndIncrement |
Atomically increments the value of the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final long |
getAndSet |
Atomically sets the element at index i to
newValue and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...) . |
final long |
getAndUpdate |
Atomically updates (with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...) ) the element at index i with the results of applying the given function, returning the previous value. |
final long |
getOpaque |
Returns the current value of the element at index i , with memory effects as specified by VarHandle.getOpaque(java.lang.Object...) . |
final long |
getPlain |
Returns the current value of the element at index i , with memory semantics of reading as if the variable was declared non-volatile . |
final long |
incrementAndGet |
Atomically increments the value of the element at index i , with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...) . |
final void |
lazySet |
Sets the element at index i to newValue , with memory effects as specified by VarHandle.setRelease(java.lang.Object...) . |
final int |
length() |
Returns the length of the array. |
final void |
set |
Sets the element at index i to newValue , with memory effects as specified by VarHandle.setVolatile(java.lang.Object...) . |
final void |
setOpaque |
Sets the element at index i to newValue , with memory effects as specified by VarHandle.setOpaque(java.lang.Object...) . |
final void |
setPlain |
Sets the element at index i to newValue , with memory semantics of setting as if the variable was declared non-volatile and non-final . |
final void |
setRelease |
Sets the element at index i to newValue , with memory effects as specified by VarHandle.setRelease(java.lang.Object...) . |
String |
toString() |
Returns the String representation of the current values of array. |
final long |
updateAndGet |
Atomically updates (with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...) ) the element at index i with the results of applying the given function, returning the updated value. |
final boolean |
weakCompareAndSet |
Deprecated. |
final boolean |
weakCompareAndSetAcquire |
Possibly atomically sets the element at index i to newValue if the element's current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetAcquire(java.lang.Object...) . |
final boolean |
weakCompareAndSetPlain |
Possibly atomically sets the element at index i to newValue if the element's current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetPlain(java.lang.Object...) . |
final boolean |
weakCompareAndSetRelease |
Possibly atomically sets the element at index i to newValue if the element's current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetRelease(java.lang.Object...) . |
final boolean |
weakCompareAndSetVolatile |
Possibly atomically sets the element at index i to newValue if the element's current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSet(java.lang.Object...) . |
public AtomicLongArray(int length)
length
- the length of the arraypublic AtomicLongArray(long[] array)
array
- the array to copy elements fromNullPointerException
- if array is nullpublic final int length()
public final long get(int i)
i
, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...)
.i
- the indexpublic final void set(int i, long newValue)
i
to newValue
, with memory effects as specified by VarHandle.setVolatile(java.lang.Object...)
.i
- the indexnewValue
- the new valuepublic final void lazySet(int i, long newValue)
i
to newValue
, with memory effects as specified by VarHandle.setRelease(java.lang.Object...)
.i
- the indexnewValue
- the new valuepublic final long getAndSet(int i, long newValue)
i
to
newValue
and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...)
.i
- the indexnewValue
- the new valuepublic final boolean compareAndSet(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successful. False return indicates that the actual value was not equal to the expected value.@Deprecated(since="9") public final boolean weakCompareAndSet(int i, long expectedValue, long newValue)
compareAndExchange(int, long, long)
and compareAndSet(int, long, long)
). To avoid confusion over plain or volatile memory effects it is recommended that the method weakCompareAndSetPlain(int, long, long)
be used instead.i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.weakCompareAndSetPlain(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successfulpublic final boolean weakCompareAndSetPlain(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.weakCompareAndSetPlain(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successfulpublic final long getAndIncrement(int i)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
. Equivalent to getAndAdd(i, 1)
.
i
- the indexpublic final long getAndDecrement(int i)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
. Equivalent to getAndAdd(i, -1)
.
i
- the indexpublic final long getAndAdd(int i, long delta)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
.i
- the indexdelta
- the value to addpublic final long incrementAndGet(int i)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
. Equivalent to addAndGet(i, 1)
.
i
- the indexpublic final long decrementAndGet(int i)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
. Equivalent to addAndGet(i, -1)
.
i
- the indexpublic long addAndGet(int i, long delta)
i
, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...)
.i
- the indexdelta
- the value to addpublic final long getAndUpdate(int i, LongUnaryOperator updateFunction)
VarHandle.compareAndSet(java.lang.Object...)
) the element at index i
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.i
- the indexupdateFunction
- a side-effect-free functionpublic final long updateAndGet(int i, LongUnaryOperator updateFunction)
VarHandle.compareAndSet(java.lang.Object...)
) the element at index i
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.i
- the indexupdateFunction
- a side-effect-free functionpublic final long getAndAccumulate(int i, long x, LongBinaryOperator accumulatorFunction)
VarHandle.compareAndSet(java.lang.Object...)
) the element at index i
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 of the element at index i
as its first argument, and the given update as the second argument.i
- the indexx
- the update valueaccumulatorFunction
- a side-effect-free function of two argumentspublic final long accumulateAndGet(int i, long x, LongBinaryOperator accumulatorFunction)
VarHandle.compareAndSet(java.lang.Object...)
) the element at index i
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 of the element at index i
as its first argument, and the given update as the second argument.i
- the indexx
- the update valueaccumulatorFunction
- a side-effect-free function of two argumentspublic String toString()
public final long getPlain(int i)
i
, with memory semantics of reading as if the variable was declared non-volatile
.i
- the indexpublic final void setPlain(int i, long newValue)
i
to newValue
, with memory semantics of setting as if the variable was declared non-volatile
and non-final
.i
- the indexnewValue
- the new valuepublic final long getOpaque(int i)
i
, with memory effects as specified by VarHandle.getOpaque(java.lang.Object...)
.i
- the indexpublic final void setOpaque(int i, long newValue)
i
to newValue
, with memory effects as specified by VarHandle.setOpaque(java.lang.Object...)
.i
- the indexnewValue
- the new valuepublic final long getAcquire(int i)
i
, with memory effects as specified by VarHandle.getAcquire(java.lang.Object...)
.i
- the indexpublic final void setRelease(int i, long newValue)
i
to newValue
, with memory effects as specified by VarHandle.setRelease(java.lang.Object...)
.i
- the indexnewValue
- the new valuepublic final long compareAndExchange(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value, referred to as the witness value, == expectedValue
, with memory effects as specified by VarHandle.compareAndExchange(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuepublic final long compareAndExchangeAcquire(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value, referred to as the witness value, == expectedValue
, with memory effects as specified by VarHandle.compareAndExchangeAcquire(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuepublic final long compareAndExchangeRelease(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value, referred to as the witness value, == expectedValue
, with memory effects as specified by VarHandle.compareAndExchangeRelease(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuepublic final boolean weakCompareAndSetVolatile(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.weakCompareAndSet(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successfulpublic final boolean weakCompareAndSetAcquire(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.weakCompareAndSetAcquire(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successfulpublic final boolean weakCompareAndSetRelease(int i, long expectedValue, long newValue)
i
to newValue
if the element's current value == expectedValue
, with memory effects as specified by VarHandle.weakCompareAndSetRelease(java.lang.Object...)
.i
- the indexexpectedValue
- the expected valuenewValue
- the new valuetrue
if successful
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/concurrent/atomic/AtomicLongArray.html
compareAndExchange(int, long, long)
andcompareAndSet(int, long, long)
).