[PATCH] Fix double-checked locking in _res_hconf_reorder_addrs [BZ #19074]

[Siddhesh Poyarekar]

On Tuesday 06 October 2015 08:03 PM, Florian Weimer wrote:
> Do we have documentation on the wiki for common concurrency idioms?

Not that I know.

> It's probably best to document things that work and way, and stick to
> that, instead of using ad-hoc schemes all over the place.  (I think the
> code I showed is sufficiently close to the usual double-checked locking
> idiom, except that the guarded section may run multiple times.)

A wiki page may be useful, but it's not a replacement for a code comment
that explains why it works, which is specific to the code block in question.

Siddhesh