edu.emory.mathcs.backport.java.util.concurrent.atomic
Class AtomicLongArray
java.lang.Object
edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicLongArray
- java.io.Serializable
public class AtomicLongArray
extends java.lang.Object
implements java.io.Serializable
A 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.
AtomicLongArray(int length) - Creates a new AtomicLongArray of given length.
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AtomicLongArray(long[] array) - Creates a new AtomicLongArray with the same length as, and
all elements copied from, the given array.
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long | addAndGet(int i, long delta) - Atomically adds the given value to the element at index i.
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boolean | compareAndSet(int i, long expect, long update) - Atomically sets the value to the given updated value
if the current value == the expected value.
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long | decrementAndGet(int i) - Atomically decrements by one the element at index i.
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long | get(int i) - Gets the current value at position i.
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long | getAndAdd(int i, long delta) - Atomically adds the given value to the element at index i.
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long | getAndDecrement(int i) - Atomically decrements by one the element at index i.
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long | getAndIncrement(int i) - Atomically increments by one the element at index i.
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long | getAndSet(int i, long newValue) - Atomically sets the element at position i to the given value
and returns the old value.
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long | incrementAndGet(int i) - Atomically increments by one the element at index i.
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void | lazySet(int i, long newValue) - Eventually sets the element at position i to the given value.
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int | length() - Returns the length of the array.
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void | set(int i, long newValue) - Sets the element at position i to the given value.
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String | toString() - Returns the String representation of the current values of array.
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boolean | weakCompareAndSet(int i, long expect, long update) - Atomically sets the value to the given updated value
if the current value == the expected value.
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AtomicLongArray
public AtomicLongArray(int length)
Creates a new AtomicLongArray of given length.
length
- the length of the array
AtomicLongArray
public AtomicLongArray(long[] array)
Creates a new AtomicLongArray with the same length as, and
all elements copied from, the given array.
array
- the array to copy elements from
addAndGet
public long addAndGet(int i,
long delta)
Atomically adds the given value to the element at index i.
i
- the indexdelta
- the value to add
compareAndSet
public final boolean compareAndSet(int i,
long expect,
long update)
Atomically sets the value to the given updated value
if the current value == the expected value.
i
- the indexexpect
- the expected valueupdate
- the new value
- true if successful. False return indicates that
the actual value was not equal to the expected value.
decrementAndGet
public final long decrementAndGet(int i)
Atomically decrements by one the element at index i.
get
public final long get(int i)
Gets the current value at position i.
getAndAdd
public final long getAndAdd(int i,
long delta)
Atomically adds the given value to the element at index i.
i
- the indexdelta
- the value to add
getAndDecrement
public final long getAndDecrement(int i)
Atomically decrements by one the element at index i.
getAndIncrement
public final long getAndIncrement(int i)
Atomically increments by one the element at index i.
getAndSet
public final long getAndSet(int i,
long newValue)
Atomically sets the element at position i to the given value
and returns the old value.
i
- the indexnewValue
- the new value
incrementAndGet
public final long incrementAndGet(int i)
Atomically increments by one the element at index i.
lazySet
public final void lazySet(int i,
long newValue)
Eventually sets the element at position i to the given value.
i
- the indexnewValue
- the new value
length
public final int length()
Returns the length of the array.
set
public final void set(int i,
long newValue)
Sets the element at position i to the given value.
i
- the indexnewValue
- the new value
toString
public String toString()
Returns the String representation of the current values of array.
- the String representation of the current values of array.
weakCompareAndSet
public final boolean weakCompareAndSet(int i,
long expect,
long update)
Atomically sets the value to the given updated value
if the current value == the expected value.
May fail spuriously.
i
- the indexexpect
- the expected valueupdate
- the new value