Interfaces for the NAG Mark 27.1 omp Chapter.
omp - OpenMP Utilities
This module contains utilities for controlling the OpenMP environment for your program. They are based on OpenMP runtime library routines, although their functionality varies slightly.
Active parallel region test:
Nested OpenMP Parallelism
Number of OpenMP Threads
OpenMP Active Levels of Parallelism
Threaded library test:
For full information please refer to the NAG Library document