jist.runtime
Class Pool.ArrayPool

java.lang.Object
  jist.runtime.Pool
      jist.runtime.Pool.ArrayPool

Enclosing class:

Pool

public static class Pool.ArrayPool
extends Pool

Implements an object pool for the massively used Object array objects. Note that, for performance reasons, this class is intentionally NOT thread-safe.

Since:

JIST1.0

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

Nested classes/interfaces inherited from class jist.runtime.Pool

Pool.ArrayPool, Pool.ContinuationPool, Pool.EventPool

Field Summary

private int	count Index into array pool.
private java.lang.Object[][]	pool Private array pool of Object arrays of size 'size'.
private int	size Size of Object arrays pooled.

Constructor Summary

Pool.ArrayPool(int arraysize, int poolsize)
Create new object array pool of given size, for array of given size.

Method Summary

java.lang.Object[]	get() Return an array from the pool, or create a new one if pool is empty.
static void	main(java.lang.String[] args) Small program to test performance of ArrayPool implementation.
void	put(java.lang.Object[] o) Place a free (otherwise unused) array object back in the pool, if there is space.

Methods inherited from class java.lang.Object

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

Field Detail

size

private final int size

Size of Object arrays pooled.

pool

private final java.lang.Object[][] pool

Private array pool of Object arrays of size 'size'.

count

private int count

Index into array pool.

Constructor Detail

Pool.ArrayPool

public Pool.ArrayPool(int arraysize,
                      int poolsize)

Create new object array pool of given size, for array of given size.

Parameters:

arraysize - object array size pooled

poolsize - size of object array pool

Method Detail

get

public java.lang.Object[] get()

Return an array from the pool, or create a new one if pool is empty.

Returns:

initialized Object array

put

public void put(java.lang.Object[] o)

Place a free (otherwise unused) array object back in the pool, if there is space. Remember to any clear reference from the array to allow garbage collection to occur.

Parameters:

o - reference to free array object

main

public static void main(java.lang.String[] args)

Small program to test performance of ArrayPool implementation.

Parameters:

args - command line parameters