trivial-garbage-devel December 2012

trivial-garbage-devel@common-lisp.net

2 participants
2 discussions

Re: [trivial-garbage-devel] Finalize with closure
by Luís Oliveira 13 Dec '12

13 Dec '12

On Wed, Dec 12, 2012 at 9:36 PM, Hans Höglund <hans(a)hanshoglund.se> wrote: > I use 32-bit LispWorks on OS X 10.7 and it works well enough. > > I do not know the behavior in other implementations. Right, I re-checked the documentation and Lispworks indeed runs the finalizer before reclaiming the object, which is why your approach works there. It won't work in SBCL, for example. As such, we cannot support this feature in a portable fashion. :-/ I've created a new issue to document this: <https://github.com/trivial-garbage/trivial-garbage/issues/8>. Thanks, -- Luís Oliveira http://r42.eu/~luis/

2 1

[trivial-garbage-devel] Finalize with closure
by Hans Höglund 09 Dec '12

09 Dec '12

Hello, I found myself wanting to reference the finalized object from a finalizer, so I added this wrapper around trivial-garbage:finalize, using a weak pointer to avoid permanently referencing the object from the finalizer closure. (defun add-finalizer (x f) (setf p (make-weak-pointer x)) (setf g (lambda () (funcall f (weak-pointer-value p)))) (finalize x g)) Would there be any problems with adding this function to the main library? I could probably provide a patch if requested. Best regards, Hans

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trivial-garbage-devel December 2012