From: Tomas Hlavaty <tom@logand.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: using finalizers
Date: Sat, 01 Jan 2022 21:25:09 +0100 [thread overview]
Message-ID: <877dbjkxui.fsf@logand.com> (raw)
In-Reply-To: <jwvh7an1jgl.fsf-monnier+emacs@gnu.org>
On Sat 01 Jan 2022 at 12:00, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>> One more question: Because make-finalizer in Emacs Lisp does not take
>> the object into account,
>
> Not sure what you mean by "the object" here.
In Common Lisp, the usual semantics is: call this thunk when this object
gets collected. I pass the object and thunk and make-finalizer does the
rest.
In Emacs Lisp, the semantics is: call this thunk when the returned
finalizer gets collected. So, if I want to finalize my object, I have
too keep the reference to the finalizer.
>> I have to make sure to hold the reference to the finalizer somehow.
>> However, this might not be trivial, because a smart compiler could
>> eliminate the reference.
>
> And I definitely don't know what you mean by "the reference", so I have
> no idea why a smart compiler would be able to eliminate it.
In Emacs Lisp, my object itself needs to keep the finalizer around,
otherwise it would get finalized.
next prev parent reply other threads:[~2022-01-01 20:25 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-30 22:43 using finalizers Tomas Hlavaty
2021-12-31 2:46 ` LdBeth
2021-12-31 3:29 ` Stefan Monnier
2021-12-31 3:36 ` Stefan Monnier
2021-12-31 4:30 ` LdBeth
2021-12-31 4:43 ` LdBeth
2021-12-31 6:28 ` Tomas Hlavaty
2021-12-31 10:59 ` LdBeth
2021-12-31 11:18 ` Tomas Hlavaty
2021-12-31 11:41 ` LdBeth
2021-12-31 12:01 ` Tomas Hlavaty
2022-01-01 17:00 ` Stefan Monnier
2022-01-01 20:25 ` Tomas Hlavaty [this message]
2022-01-01 20:47 ` Stefan Monnier
2022-01-01 22:55 ` Tomas Hlavaty
2022-01-01 23:18 ` Stefan Monnier
2022-01-01 23:47 ` Tomas Hlavaty
2022-01-01 23:26 ` Tomas Hlavaty
2021-12-31 7:50 ` Eli Zaretskii
2021-12-31 9:31 ` Tomas Hlavaty
2021-12-31 12:27 ` Eli Zaretskii
2022-01-01 17:58 ` Tomas Hlavaty
2022-01-01 18:20 ` Eli Zaretskii
2022-01-01 20:55 ` Stefan Monnier
2022-01-01 23:05 ` Tomas Hlavaty
2022-01-01 23:21 ` Stefan Monnier
2021-12-31 14:23 ` Rudolf Schlatte
2021-12-31 16:21 ` Stefan Monnier
2022-01-01 17:37 ` Tomas Hlavaty
2022-01-01 22:36 ` Tomas Hlavaty
2022-01-02 6:54 ` Eli Zaretskii
2022-01-02 7:53 ` Tomas Hlavaty
2022-01-02 8:33 ` Eli Zaretskii
2022-01-02 13:10 ` Tomas Hlavaty
2022-01-02 14:42 ` Eli Zaretskii
2022-01-02 15:16 ` Eli Zaretskii
2022-01-02 17:18 ` Tomas Hlavaty
2022-01-02 18:11 ` Rudolf Schlatte
2022-01-03 0:37 ` Tomas Hlavaty
2022-01-04 3:08 ` Richard Stallman
2021-12-31 14:39 ` LdBeth
2022-01-01 17:59 ` Tomas Hlavaty
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