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3.1.9 omp_set_nested – Enable/disable nested parallel regions ¶

Description:

Enable or disable nested parallel regions, i.e., whether team members are allowed to create new teams. The function takes the language-specific equivalent of true and false, where true enables dynamic adjustment of team sizes and false disables it.

Enabling nested parallel regions also sets the maximum number of active nested regions to the maximum supported. Disabling nested parallel regions sets the maximum number of active nested regions to one.

Note that the omp_set_nested API routine was deprecated in the OpenMP specification 5.2 in favor of omp_set_max_active_levels.

C/C++:

Prototype:

void omp_set_nested(int nested);

Fortran:

Interface:	subroutine omp_set_nested(nested)
	logical, intent(in) :: nested

See also:

omp_get_nested – Nested parallel regions, omp_set_max_active_levels – Limits the number of active parallel regions, OMP_MAX_ACTIVE_LEVELS – Set the maximum number of nested parallel regions, OMP_NESTED – Nested parallel regions

Reference:

OpenMP specification v4.5, Section 3.2.10.