NAG Library Routine Document

X06AHF

X06AHF returns $1$ if nested OpenMP parallelism has been enabled, and $0$ otherwise.

X06AHF, for multi-threaded implementations, tests whether the nesting of OpenMP parallel regions has been enabled as if with a call to X06AGF. The return value will be $1$ if nesting is enabled or $0$ if it is disabled.

Note the equivalent OpenMP routine omp_get_nested() returns a logical value.

In serial implementations of the NAG Library X06AHF will always return $0$. See the the X06 Chapter Introduction for a discussion of the behaviour of these routines when called in serial.

OpenMP Specifications http://openmp.org/wp/OpenMP-Specifications

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

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See Section 10 in X06AGF for a demonstration of how to use X06AHF.