OpenMP Functions

Provides links to functions used in the OpenMP API.

The Visual C++ implementation of the OpenMP standard includes the following functions.

Function	Description
omp_destroy_lock	Uninitializes a lock.
omp_destroy_nest_lock	Uninitializes a nestable lock.
omp_get_dynamic	Returns a value that indicates if the number of threads available in subsequent parallel region can be adjusted by the run time.
omp_get_max_threads	Returns an integer that is equal to or greater than the number of threads that would be available if a parallel region without num_threads were defined at that point in the code.
omp_get_nested	Returns a value that indicates if nested parallelism is enabled.
omp_get_num_procs	Returns the number of processors that are available when the function is called.
omp_get_num_threads	Returns the number of threads in the parallel region.
omp_get_thread_num	Returns the thread number of the thread executing within its thread team.
omp_get_wtick	Returns the number of seconds between processor clock ticks.
omp_get_wtime	Returns a value in seconds of the time elapsed from some point.
omp_in_parallel	Returns nonzero if called from within a parallel region.
omp_init_lock	Initializes a simple lock.
omp_init_nest_lock	Initializes a lock.
omp_set_dynamic	Indicates that the number of threads available in subsequent parallel region can be adjusted by the run time.
omp_set_lock	Blocks thread execution until a lock is available.
omp_set_nest_lock	Blocks thread execution until a lock is available.
omp_set_nested	Enables nested parallelism.
omp_set_num_threads	Sets the number of threads in subsequent parallel regions, unless overridden by a num_threads clause.
omp_test_lock	Attempts to set a lock but does not block thread execution.
omp_test_nest_lock	Attempts to set a nestable lock but does not block thread execution.
omp_unset_lock	Releases a lock.
omp_unset_nest_lock	Releases a nestable lock.

See Also

Concepts

OpenMP Library Reference