#!/bin/python3


import pyudev
import locale
import threading
import subprocess
# I tested this script with 1 vCPU, I probably don't work with more vCPUs
# # Anaconda uses en_US.utf8 locale
# # __wcsmbs_load_conv is called from pyudev only when multibyte characters are used
locale.setlocale(locale.LC_ALL, 'en_US.utf8')

def th1():
    context = pyudev.Context()
    # this thread must be preempted when will be in the middle
    # of __wcsmbs_load_conv. We need to burn some cpu time in the loop below.
    # 300 is magic number which works on my VM, it can be different in another setup
    for i in range(0,300):
        print(i)
        return [d for d in  context.list_devices(subsystem=u"block")]

def th2():
    print("th2")
    # we assume that hwclock is not in the first directory in $PATH
    p = subprocess.Popen(['hwclock', '--version'])
    p.wait()


thread1 = threading.Thread(target=th1)
thread2 = threading.Thread(target=th2)

thread1.start()
thread2.start()

thread1.join()
thread2.join()