Testing some singleton implementations

[Andrej Mitrovic]

On 1/31/14, Stanislav Blinov <stanislav.blinov at gmail.com> wrote:
> First, subsequent runs on my machine show interleaving results.
> It also seems that either there *is* a race in there somewhere,
> or maybe a bug?.. Some runs just flat freeze (even on small
> thread counts) :\

Hmm.. Well I know we've had some issues with threads on FreeBSD. It's
hard to just guess what's wrong though. :)