Update some docs

Author: csm10495

Doc/library/concurrent.futures.rst

@@ -415,6 +415,19 @@ to a :class:`ProcessPoolExecutor` will result in deadlock.
       require the *fork* start method for :class:`ProcessPoolExecutor` you must
       explicitly pass ``mp_context=multiprocessing.get_context("fork")``.
 
+   .. method:: terminate_workers(signal=signal.SIGTERM)
+
+      Attempt to terminate all living worker processes immediately by sending each
+      of them the given signal. If the signal is not specified, the default signal
+      :data:`signal.SIGTERM` is used.
+
+      After calling :meth:`ProcessPoolExecutor.terminate_workers`, the caller, should
+      no longer submit tasks to the executor. It is also recommended to still call
+      :meth:`ProcessPoolExecutor.shutdown` to ensure that all other resources
+      associated with the executor are freed.
+
+      .. versionadded:: 3.14
+
 .. _processpoolexecutor-example:
 
 ProcessPoolExecutor Example

Doc/whatsnew/3.14.rst

@@ -306,6 +306,9 @@ concurrent.futures
   incompatible *fork* start method you must explicitly request it by
   supplying a *mp_context* to :class:`concurrent.futures.ProcessPoolExecutor`.
   (Contributed by Gregory P.  Smith in :gh:`84559`.)
+* Add :meth:`concurrent.futures.ProcessPoolExecutor.terminate_workers` as
+  a way to terminate all living worker processes in the given pool.
+  (Contributed by Charles Machalow in :gh:`128043`.)
 
 ctypes
 ------