[Haskell-cafe] Cleaning up stable names?
jvranish at gmail.com
Mon Aug 31 16:59:13 EDT 2009
I also would like a isStableNameTargetAlive function.
Though if you had such a function then you probably _could_ make a
deRefStableName function, which, since there isn't one, probably means that
such a function would be hard to make.
On Sun, Aug 30, 2009 at 4:54 PM, Peter Verswyvelen <bugfact at gmail.com>wrote:
> >From the documentation, I don't think I grasp how stable names work.
> From the docs:
> "There is no deRefStableName operation. You can't get back from a stable
> name to the original Haskell object. The reason for this is that the
> existence of a stable name for an object does not guarantee the existence of
> the object itself; it can still be garbage collected."
> From this I can conclude that stable names behave a bit like weak pointers.
> However, suppose I have a hash table of these stable names. How can I
> remove the redundant stable names from the table? I mean removing stable
> names that refer to an object that is garbage collected? I don't see any
> function for checking that (e.g. isStableNameTargetAlive or something)
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