PR_FREEIF
=========
Conditionally frees allocated memory.
Syntax
------
.. code::
#include <prmem.h>
void PR_FREEIF(_ptr);
Parameter
~~~~~~~~~
``_ptr``
The address of memory to be returned to the heap.
Returns
~~~~~~~
Nothing.
Description
-----------
This macro returns memory to the heap when ``_ptr`` is not ``NULL``. If
``_ptr`` is ``NULL``, the macro has no effect.
