[Haskell-cafe] Haskell FFI and finalizers

Stefan O'Rear stefanor at cox.net
Wed Oct 3 20:07:34 EDT 2007

On Thu, Oct 04, 2007 at 12:55:41AM +0200, Maxime Henrion wrote:
> When writing the binding for foo_new(), I need to open a file with
> fopen() to pass it the FILE *.  Then I get a struct foo * that I can
> easily associate the the foo_destroy() finalizer.  However, when
> finalizing the struct foo * object, I want to also close the FILE *
> handle.
> If I write a small C function for doing the finalizer myself, I still
> wouldn't get passed the FILE * to close, only the struct foo * pointer
> which is of no use.

Ah, yes, this does make the situation more interesting.

Looks like newForeignPtrEnv is maybe what you want?

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