This class contains functions for implementing nestable OpenMP locks.
A nestable lock may be set multiple times by the same thread before being unset. Nestable lock variables are associated with nestable locks and may only be passed to nestable lock routines.
All nestable locks are represented by variables of type omp_nest_lock_t. All nestable lock functions require an argument that is a pointer to a variable of type omp_nest_lock_t.
Library: OpenMP Run-Time Library