1 1 2 Runtime Library Routines 1 ************************** 1 1 The runtime routines described here are defined by Section 3 of the 1 OpenMP specification in version 4.5. The routines are structured in 1 following three parts: 1
1 1 Control threads, processors and the parallel environment. They have C 1 linkage, and do not throw exceptions. 1 · omp_get_active_level Number of active parallel regions · omp_get_ancestor_thread_num Ancestor thread ID · omp_get_cancellation Whether cancellation support is enabled · omp_get_default_device Get the default device for target regions · omp_get_dynamic Dynamic teams setting · omp_get_level Number of parallel regions · omp_get_max_active_levels Maximum number of active regions · omp_get_max_task_priority Maximum task priority value that can be set · omp_get_max_threads Maximum number of threads of parallel region · omp_get_nested Nested parallel regions · omp_get_num_devices Number of target devices · omp_get_num_procs Number of processors online · omp_get_num_teams Number of teams · omp_get_num_threads Size of the active team · omp_get_proc_bind Whether theads may be moved between CPUs · omp_get_schedule Obtain the runtime scheduling method · omp_get_team_num Get team number · omp_get_team_size Number of threads in a team · omp_get_thread_limit Maximum number of threads · omp_get_thread_num Current thread ID · omp_in_parallel Whether a parallel region is active · omp_in_final Whether in final or included task region · omp_is_initial_device Whether executing on the host device · omp_set_default_device Set the default device for target regions · omp_set_dynamic Enable/disable dynamic teams · omp_set_max_active_levels Limits the number of active parallel regions · omp_set_nested Enable/disable nested parallel regions · omp_set_num_threads Set upper team size limit · omp_set_schedule Set the runtime scheduling method 1 1 Initialize, set, test, unset and destroy simple and nested locks. 1 · omp_init_lock Initialize simple lock · omp_set_lock Wait for and set simple lock · omp_test_lock Test and set simple lock if available · omp_unset_lock Unset simple lock · omp_destroy_lock Destroy simple lock · omp_init_nest_lock Initialize nested lock · omp_set_nest_lock Wait for and set simple lock · omp_test_nest_lock Test and set nested lock if available · omp_unset_nest_lock Unset nested lock · omp_destroy_nest_lock Destroy nested lock 1 1 Portable, thread-based, wall clock timer. 1 · omp_get_wtick Get timer precision. · omp_get_wtime Elapsed wall clock time. 1