Re: [Haskell-cafe] Bulletproof resource management

On Fri, Oct 15, 2010 at 8:17 PM, Antoine Latter wrote:

On Fri, Oct 15, 2010 at 11:09 AM, Florian Weimer wrote:

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* Henning Thielemann:

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Some open/close pairs have corresponding 'with' functions, that are implemented using Exception.bracket. You can also use them within GHCi. I think using both manual resource deallocation and finalizers makes everything more complicated and more unreliable.

It seems that Exception.bracket does not work in all cases, see the recent "MonadCatchIO, finally and the error monad" thread.

Anyway, the ability of closures (and threads) means that something like Exception.bracket does not prevent access to closed handles, so I still need an additional safety net.

That thread is for the function "bracket" provided by the package MonadCatchIO. Control.Exception.bracket should work fine as far as I know.

I can confer that when I brought up the issue with bracket, it's only referring to the function exported by MonadCatchIO. I sure as hell hope The Control.Exception version always works properly ;). Michael