GNU libgomp: omp_get_nested

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### 2.10 `omp_get_nested` – Nested parallel regions

Description:

  This function returns `true` if nested parallel regions are enabled, `false` otherwise. Here, `true` and `false` represent their language-specific counterparts.

  Nested parallel regions may be initialized at startup by the `OMP_NESTED` environment variable or at runtime using `omp_set_nested`. If undefined, nested parallel regions are disabled by default.

C/C++:

  Prototype: | `int omp_get_nested(void);`

Fortran:

  Interface: | `logical function omp_get_nested()`

See also:

  omp_set_nested, OMP_NESTED

Reference:

  OpenMP specification v4.5, Section 3.2.11.