deleting contents of an array.

deleting contents of an array.

[Michal]

Hallo group members.

I created vector:
(setq my-vec (make-vector 10 nil))

then I added marker to it.
(let ((m1 (make-marker)))
(set-marker m1 (point) (current-buffer))
(aset my-vec 3 m1))

Then I decided to clean whole vector with:
(fillarray my-vec nil)

Will garbage collector take my no longer used element, that was on position 3 of vector, so that no memory leak will be present?

regards,
Michal

Re: deleting contents of an array.

[Johan Bockgård]

Michal <rabbit50@tenbit.pl> writes:

> I created vector:
> (setq my-vec (make-vector 10 nil))
>
> then I added marker to it.
> (let ((m1 (make-marker)))
> (set-marker m1 (point) (current-buffer))
> (aset my-vec 3 m1))
>
> Then I decided to clean whole vector with:
> (fillarray my-vec nil)
>
> Will garbage collector take my no longer used element, that was on
> position 3 of vector, so that no memory leak will be present?

Yes, but

    Insertion and deletion in a buffer must check all the markers and
    relocate them if necessary.  This slows processing in a buffer with
    a large number of markers.  For this reason, it is a good idea to
    make a marker point nowhere if you are sure you don't need it any
    more.  Unreferenced markers are garbage collected eventually, but
    until then will continue to use time if they do point somewhere.

(info "(elisp) Overview of Markers")

-- 
Johan Bockgård

Re: deleting contents of an array.

[Michal]

bojohan+news@dd.chalmers.se (Johan Bockgård) writes:

> Yes, but
>
>     Insertion and deletion in a buffer must check all the markers and
>     relocate them if necessary.  This slows processing in a buffer with
>     a large number of markers.  For this reason, it is a good idea to
>     make a marker point nowhere if you are sure you don't need it any
>     more.  Unreferenced markers are garbage collected eventually, but
>     until then will continue to use time if they do point somewhere.

Johan,
Thank You for suggestion

Regards,
Michal