mask in waitQSem

[Simon Marlow]

On 14/11/2014 21:30, Brandon Allbery wrote:
> On Fri, Nov 14, 2014 at 4:23 PM, Yuras Shumovich <shumovichy at gmail.com
> <mailto:shumovichy at gmail.com>> wrote:
>
>     Here mask is used, but I looks completely useless for me. waitQSem
>     itself should be called with async exceptions masked, otherwise there is
>     no way to prevent resource leak.
>
>     Do anyone know why mask is used here?
>
>
> I thought QSem was known to be completely unsafe and
> http://hackage.haskell.org/package/SafeSemaphore was recommended
> instead, with QSem and friends slated for removal?

FUD! :)

I revamped it for 7.6 rather than remove it, it's safe and fast now.

Cheers,
Simon


> In any case, there are probably leftover attempts to make it safe, yes.
>
> --
> brandon s allbery kf8nh                               sine nomine associates
> allbery.b at gmail.com <mailto:allbery.b at gmail.com> ballbery at sinenomine.net
> <mailto:ballbery at sinenomine.net>
> unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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>
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