@gregory.p.smith, I'm puzzled by your references to POSIX and/or os.fork().

The code in question looks like:

import concurrent.futures
import sys

def f():
    import ctypes

while True:
    with concurrent.futures.ProcessPoolExecutor() as executor:
        ftr = executor.submit(f)
        ftr.result()

which, to me, looks like pure Python.

Are you saying that this code can't work on GNU/Linux systems.