.. _Initializing_and_Terminating_the_Library: Initializing and Terminating the Library ======================================== |full_name| automatically initializes the task scheduler. The initialization process is involved when a thread uses task scheduling services the first time, for example any parallel algorithm, flow graph or task group. The termination happens when the last such thread exits. Explicit Library Finalization ***************************** oneTBB supports an explicit library termination as a preview feature. The ``oneapi::tbb::finalize`` function called with an instance of class ``oneapi::tbb::task_scheduler_handle`` blocks the calling thread until all worker threads implicitly created by the library have completed. If waiting for thread completion is not safe, e.g. may result in a deadlock or called inside a task, a parallel algorithm, or a flow graph node, the method fails. If you know how many active ``oneapi::tbb::task_scheduler_handle`` instances exist in the program, it is recommended to call ``oneapi::tbb::release`` function on all but the last one, then call ``oneapi::tbb::finalize`` for the last instance.
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