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java.util.concurrent.atomic.AtomicLongArray

java.lang.Object
java.util.concurrent.atomic.AtomicLongArray Serializable

A long array in which elements may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables.

Summary

Public Constructors

            AtomicLongArray(int length)
Create a new AtomicLongArray of given length.
            AtomicLongArray(long[] array)
Create a new AtomicLongArray with the same length as, and all elements copied from, the given array.

Public Methods

          long  addAndGet(int i, long delta)
Atomically add the given value to element at index i.
    final      boolean  compareAndSet(int i, long expect, long update)
Atomically set the value to the given updated value if the current value == the expected value.
    final      long  decrementAndGet(int i)
Atomically decrement the element at index i.
    final      long  get(int i)
Get the current value at position i.
    final      long  getAndAdd(int i, long delta)
Atomically add the given value to element at index i.
    final      long  getAndDecrement(int i)
Atomically decrement by one the element at index i.
    final      long  getAndIncrement(int i)
Atomically increment by one the element at index i.
    final      long  getAndSet(int i, long newValue)
Set the element at position i to the given value and return the old value.
    final      long  incrementAndGet(int i)
Atomically increment the element at index i.
    final      int  length()
Returns the length of the array.
    final      void  set(int i, long newValue)
Set the element at position i to the given value.
          String  toString()
Returns the String representation of the current values of array.
    final      boolean  weakCompareAndSet(int i, long expect, long update)
Atomically set the value to the given updated value if the current value == the expected value.
Methods inherited from class java.lang.Object

Details

Public Constructors

public AtomicLongArray(int length)

Create a new AtomicLongArray of given length.

Parameters

length the length of the array

public AtomicLongArray(long[] array)

Create a new AtomicLongArray with the same length as, and all elements copied from, the given array.

Parameters

array the array to copy elements from

Throws

NullPointerException if array is null

Public Methods

public long addAndGet(int i, long delta)

Atomically add the given value to element at index i.

Parameters

i the index
delta the value to add

Returns

  • the updated value;

public final boolean compareAndSet(int i, long expect, long update)

Atomically set the value to the given updated value if the current value == the expected value.

Parameters

i the index
expect the expected value
update the new value

Returns

  • true if successful. False return indicates that the actual value was not equal to the expected value.

public final long decrementAndGet(int i)

Atomically decrement the element at index i.

Parameters

i the index

Returns

  • the updated value;

public final long get(int i)

Get the current value at position i.

Parameters

i the index

Returns

  • the current value

public final long getAndAdd(int i, long delta)

Atomically add the given value to element at index i.

Parameters

i the index
delta the value to add

Returns

  • the previous value;

public final long getAndDecrement(int i)

Atomically decrement by one the element at index i.

Parameters

i the index

Returns

  • the previous value;

public final long getAndIncrement(int i)

Atomically increment by one the element at index i.

Parameters

i the index

Returns

  • the previous value;

public final long getAndSet(int i, long newValue)

Set the element at position i to the given value and return the old value.

Parameters

i the index
newValue the new value

Returns

  • the previous value

public final long incrementAndGet(int i)

Atomically increment the element at index i.

Parameters

i the index

Returns

  • the updated value;

public final int length()

Returns the length of the array.

Returns

  • the length of the array

public final void set(int i, long newValue)

Set the element at position i to the given value.

Parameters

i the index
newValue the new value

public String toString()

Returns the String representation of the current values of array.

Returns

  • the String representation of the current values of array.

public final boolean weakCompareAndSet(int i, long expect, long update)

Atomically set the value to the given updated value if the current value == the expected value. May fail spuriously.

Parameters

i the index
expect the expected value
update the new value

Returns

  • true if successful.
Copyright 2007 Google Inc. Build 0.9_r1-98467 - 14 Aug 2008 18:48