import ctypes
import os

FUNC = ctypes.CFUNCTYPE(ctypes.c_int)

def callback():
    return 42

def do_stuff():
    flist = [FUNC(callback) for i in range(100000)]
    for fn in flist:
        assert fn() == 42


pid = os.fork()    # two processes from now on

if pid == 0:
    # in the child process
    do_stuff()

else:
    # in the parent process
    do_stuff()

    _, result = os.waitpid(pid, 0)
    if not os.WIFEXITED(result):
        print("child exited with signal %d" % os.WTERMSIG(result))