# PR_INSERT_BEFORE

Inserts an element before another element in a circular list.

## Syntax

```{code}
#include <prclist.h>

PR_INSERT_BEFORE (
   PRCList *elemp1
   PRCList *elemp2);
```

### Parameters

`elemp1`

: A pointer to the element to be inserted.

`elemp2`

: A pointer to the element before which `elemp1` is to be inserted.

## Description

PR_INSERT_BEFORE inserts the element specified by `elemp1` into the
circular list, before the element specified by `elemp2`.