Reading umask (thread-safe)

I know this pattern to read the umask in Python:

current_umask = os.umask(0)  # line1
os.umask(current_umask)      # line2
return current_umask         # line3

But this is not thread-safe.

A thread which executes between line1 and line2 will have a different umask.

Is there a thread-safe way to read the umask in Python?

from Reading umask (thread-safe)