org.modeshape.common.collection.ring

Class Pointers

java.lang.Object

org.modeshape.common.collection.ring.Pointers

public class Pointers
extends Object

Static methods for atomically modifying an array of Pointer instances.

Method Summary

Modifier and Type	Method and Description
static <T> void	add(T holder, AtomicReferenceFieldUpdater<T,Pointer[]> updater, Cursor cursor, Pointer... pointersToAdd) Atomically add the specified Pointer instance(s) to an array known to the given updator.
static long	getMinimum(Pointer[] pointers, long minimum)
static <T> boolean	remove(T holder, AtomicReferenceFieldUpdater<T,Pointer[]> updater, Pointer pointer) Atomically remove the specified Pointer instance from an array known to the given updator.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getMinimum

public static long getMinimum(Pointer[] pointers,
                              long minimum)

add

public static <T> void add(T holder,
                           AtomicReferenceFieldUpdater<T,Pointer[]> updater,
                           Cursor cursor,
                           Pointer... pointersToAdd)

Atomically add the specified Pointer instance(s) to an array known to the given updator.

Parameters:

holder - the object that holds the array; may not be null

updater - the updator of the array; may not be null

cursor - the cursor that the pointers will follow; may be null if none of the pointers are to be changed

pointersToAdd - the pointer(s) to be added to the existing pointers

remove

public static <T> boolean remove(T holder,
                                 AtomicReferenceFieldUpdater<T,Pointer[]> updater,
                                 Pointer pointer)

Atomically remove the specified Pointer instance from an array known to the given updator.

Parameters:

holder - the object that holds the array; may not be null

updater - the updator of the array; may not be null

pointer - the pointer to be removed from the existing pointers

Returns:

true if the pointer was removed, or false if the array never contained the pointer