[#Arena-free]
= xref:Arena.adoc[Arena]::free
:relfileprefix: ../
:mrdocs:

Free a previously allocated chunk of memory. Freeing the zero pointer has no effect. Raises std::runtime_error in case of error.

== Synopsis

Declared in `<support/lockedpool.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
free(void* ptr);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ptr*
| Pointer to the chunk previously returned by alloc.
|===


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