NAG CL Interface
a00acc (licence)

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1 Purpose

a00acc provides a convenient means of checking the availability of a valid licence key on licence-managed implementations before starting computations that will use NAG Library functions. In particular, the use of this function is highly recommended in programs that call NAG Library functions within multithreaded sections (e.g., OpenMP parallel regions). The function need only be called once, before the start of the first multithreaded section.

2 Specification

#include <nag.h>
Nag_Boolean  a00acc ()
The function may be called by the names: a00acc, nag_info_licence or nag_licence_query.

3 Description

a00acc returns the logical value Nag_TRUE if a valid licence is found, otherwise Nag_FALSE is returned.
On non licence-managed implementations, Nag_TRUE is always returned.

4 References


5 Arguments


6 Error Indicators and Warnings


7 Accuracy

Not applicable.

8 Parallelism and Performance

Background information to multithreading can be found in the Multithreading documentation.
Not applicable.

9 Further Comments


10 Example

This example prints an appropriate message depending upon the value returned by a00acc.

10.1 Program Text

Program Text (a00acce.c)

10.2 Program Data


10.3 Program Results

Program Results (a00acce.r)