AFAIR, the only object that you need to be careful with is the Space [1], everything else is garbage collected. You could put the Space in a ResourceT, but only if it ran on its own thread (as soon as a block of ResourceT finishes, everything is deallocated, so you wouldn't be able to follow the approach taken by HipmunkPlayground). Cheers, [1] http://hackage.haskell.org/packages/archive/Hipmunk/5.2.0.10/doc/html/Physic... On Wed, Jan 30, 2013 at 11:15 AM, Thiago Negri wrote:

Felipe, I'm trying to use your Hipmunk package. :) The resources I need to keep around are the objects used for the simulation. Do you recomend using "resourcet" to handle this or something else?

Thanks.

2013/1/30 Felipe Almeida Lessa

...

Everything that Johan Tibell said + you may be interested in the resourcet package [1] (which is used by conduit to handle resources).

Cheers,

[1] http://hackage.haskell.org/package/resourcet

On Tue, Jan 29, 2013 at 8:59 PM, Thiago Negri wrote:

...

`Control.Exception.bracket` is a nice function to acquire and release a resource in a small context.

But, how should I handle resources that are hold for a long time?

Should I put `Control.Exception.finally` on every single line of my finalizers? What exceptions may occur on an IO operation? Every IO function has the risk of throwing an exception?

Thanks, Thiago.

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-- Felipe.

-- Felipe.