[Libguestfs] [PATCH threads v2 0/5] Add support for thread-safe handle.
Previous discussion here:
https://www.redhat.com/archives/libguestfs/2015-June/thread.html#00048
v2:
- Use a cleanup handler to release the lock.
- Rebase to upstream.
Note I have not fixed the problem(s) with error handling (patch 3).