The runtime routines described here are defined by Section 3 of the OpenMP specification in version 4.5. The routines are structured in following three parts:
omp_get_active_level – Number of parallel regionsomp_get_ancestor_thread_num – Ancestor thread IDomp_get_cancellation – Whether cancellation support is enabledomp_get_default_device – Get the default device for target regionsomp_get_dynamic – Dynamic teams settingomp_get_initial_device – Return device number of initial deviceomp_get_level – Obtain the current nesting levelomp_get_max_active_levels – Current maximum number of active regionsomp_get_max_task_priority – Maximum priority valueomp_get_max_threads – Maximum number of threads of parallel regionomp_get_nested – Nested parallel regionsomp_get_num_devices – Number of target devicesomp_get_num_procs – Number of processors onlineomp_get_num_teams – Number of teamsomp_get_num_threads – Size of the active teamomp_get_proc_bind – Whether threads may be moved between CPUsomp_get_schedule – Obtain the runtime scheduling methodomp_get_supported_active_levels – Maximum number of active regions supportedomp_get_team_num – Get team numberomp_get_team_size – Number of threads in a teamomp_get_thread_limit – Maximum number of threadsomp_get_thread_num – Current thread IDomp_in_parallel – Whether a parallel region is activeomp_in_final – Whether in final or included task regionomp_is_initial_device – Whether executing on the host deviceomp_set_default_device – Set the default device for target regionsomp_set_dynamic – Enable/disable dynamic teamsomp_set_max_active_levels – Limits the number of active parallel regionsomp_set_nested – Enable/disable nested parallel regionsomp_set_num_threads – Set upper team size limitomp_set_schedule – Set the runtime scheduling methodomp_init_lock – Initialize simple lockomp_set_lock – Wait for and set simple lockomp_test_lock – Test and set simple lock if availableomp_unset_lock – Unset simple lockomp_destroy_lock – Destroy simple lockomp_init_nest_lock – Initialize nested lockomp_set_nest_lock – Wait for and set nested lockomp_test_nest_lock – Test and set nested lock if availableomp_unset_nest_lock – Unset nested lockomp_destroy_nest_lock – Destroy nested lockomp_get_wtick – Get timer precisionomp_get_wtime – Elapsed wall clock timeomp_fulfill_event – Fulfill and destroy an OpenMP event