X06 Chapter Contents
X06 Chapter Introduction
NAG Library Manual

# NAG Library Routine DocumentX06XAF

Note:  before using this routine, please read the Users' Note for your implementation to check the interpretation of bold italicised terms and other implementation-dependent details.

## 1  Purpose

X06XAF returns $1$ when using a multi-threaded implementation of the NAG Library and $0$ otherwise.

## 2  Specification

 FUNCTION X06XAF ( )
 INTEGER X06XAF

## 3  Description

X06XAF can be used to determine whether you are using a serial or multi-threaded implementation of the NAG Library. In particular, with this information the behaviour of the other routines in this chapter can be predicted, as described in the X06 Chapter Introduction.
The routine returns $1$ when a multi-threaded implementation of the Library is being used and $0$ if a serial implementation is being used.

None.

None.

None.

Not applicable.

## 8  Parallelism and Performance

X06XAF is not threaded in any implementation.