# 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.