Arena storage pool: Difference between revisions

=={{header|Wren}}==

Memory is managed automatically by Wren's VM which allocates memory for new objects and reclaims that memory when those objects are no longer used.

However, the built-in List class (a dynamic array) does give the programmer some control of memory in that a minimum size can be specified when the List is created. It's also possible to request a garbage collection (though not for a specific unused object) by calling the System.gc method.

We can therefore simulate an arena storage pool as follows.

<lang ecmascript>var arena = List.filled(5, 0) // allocate memory for 5 integers

for (i in 0..4) arena[i] = i // insert some integers

System.print(arena) // print them

arena = null // make arena eligible for garbage collection

System.gc() // request immediate garbage collection</lang>

{{out}}

<pre>

[0, 1, 2, 3, 4]

</pre>