edu.emory.mathcs.backport.java.util.concurrent.atomic
Class AtomicIntegerArray
java.lang.Object
edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicIntegerArray
- java.io.Serializable
public class AtomicIntegerArray
extends java.lang.Object
implements java.io.Serializable
An int 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.
AtomicIntegerArray(int length) - Creates a new AtomicIntegerArray of given length.
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AtomicIntegerArray(int[] array) - Creates a new AtomicIntegerArray with the same length as, and
all elements copied from, the given array.
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int | addAndGet(int i, int delta) - Atomically adds the given value to the element at index i.
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boolean | compareAndSet(int i, int expect, int update) - Atomically sets the element at position i to the given
updated value if the current value == the expected value.
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int | decrementAndGet(int i) - Atomically decrements by one the element at index i.
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int | get(int i) - Gets the current value at position i.
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int | getAndAdd(int i, int delta) - Atomically adds the given value to the element at index i.
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int | getAndDecrement(int i) - Atomically decrements by one the element at index i.
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int | getAndIncrement(int i) - Atomically increments by one the element at index i.
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int | getAndSet(int i, int newValue) - Atomically sets the element at position i to the given
value and returns the old value.
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int | incrementAndGet(int i) - Atomically increments by one the element at index i.
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void | lazySet(int i, int 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, int 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, int expect, int update) - Atomically sets the element at position i to the given
updated value if the current value == the expected value.
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AtomicIntegerArray
public AtomicIntegerArray(int length)
Creates a new AtomicIntegerArray of given length.
length
- the length of the array
AtomicIntegerArray
public AtomicIntegerArray(int[] array)
Creates a new AtomicIntegerArray with the same length as, and
all elements copied from, the given array.
array
- the array to copy elements from
addAndGet
public final int addAndGet(int i,
int 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,
int expect,
int update)
Atomically sets the element at position i 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 int decrementAndGet(int i)
Atomically decrements by one the element at index i.
get
public final int get(int i)
Gets the current value at position i.
getAndAdd
public final int getAndAdd(int i,
int delta)
Atomically adds the given value to the element at index i.
i
- the indexdelta
- the value to add
getAndDecrement
public final int getAndDecrement(int i)
Atomically decrements by one the element at index i.
getAndIncrement
public final int getAndIncrement(int i)
Atomically increments by one the element at index i.
getAndSet
public final int getAndSet(int i,
int 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 int incrementAndGet(int i)
Atomically increments by one the element at index i.
lazySet
public final void lazySet(int i,
int 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,
int 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,
int expect,
int update)
Atomically sets the element at position i to the given
updated value if the current value == the expected value.
May fail spuriously.
i
- the indexexpect
- the expected valueupdate
- the new value