NAG FL Interface
x06akf (get_​max_​active_​levels)

Settings help

FL Name Style:

FL Specification Language:

1 Purpose

x06akf returns the maximum number of nested active parallel regions allowed.

2 Specification

Fortran Interface
Function x06akf ( )
Integer :: x06akf
C Header Interface
#include <nag.h>
Integer  x06akf_ ()
The routine may be called by the names x06akf or nagf_omp_get_max_active_levels.

3 Description

x06akf, for multithreaded implementations, retrieves the maximum number of nested active parallel regions allowed. This has either been set by the user or is the default for the implementation of OpenMP being used.
In serial implementations of the NAG Library this routine will always return 0. See the X06 Chapter Introduction for a discussion of the behaviour of these routines when called in serial.

4 References

The OpenMP API Specification for Parallel Programming
Chapman B, Jost G and van der Pas R (2008) Using OpenMP Portable Shared Memory Parallel Programming The MIT Press

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.
x06akf is not threaded in any implementation.

9 Further Comments


10 Example

See x06ajf for a demonstration of how to use x06akf.