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| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: High level C |
| Date | 2016-08-05 10:34 -0700 |
| Organization | None to speak of |
| Message-ID | <ln1t23yva0.fsf@kst-u.example.com> (permalink) |
| References | (16 earlier) <nnt7d2$bpt$1@dont-email.me> <kfnr3a4hsc9.fsf@x-alumni2.alumni.caltech.edu> <20160805054817.0af37f27@maxa-pc> <lninvfz1b1.fsf@kst-u.example.com> <20160805183052.2284e4d3@maxa-pc> |
Melzzzzz <mel@zzzzz.com> writes:
> On Fri, 05 Aug 2016 08:24:18 -0700
> Keith Thompson <kst-u@mib.org> wrote:
>> Melzzzzz <mel@zzzzz.com> writes:
>> > On Thu, 04 Aug 2016 19:17:42 -0700
>> > Tim Rentsch <txr@alumni.caltech.edu> wrote:
>> >> Something I wanted to mention but didn't work its way into the
>> >> flow is how to deal with resources (eg, open files). Any
>> >> resource that is needed normally will be given its own object.
>> >> When a resource object is allocation, normally it will register
>> >> a "finalization hook", a function that is called just before
>> >> the object is about to be reclaimed. I think most collectors
>> >> these days provide a way to associate finalization hooks with
>> >> allocated objects, for exactly this purpose.
>> >
>> > Wrong. Finalizers are useless for resource management as
>> > conservative GC is non deterministic. Finalizers are only good for
>> > debugging purposes...
>>
>> I would imagine that non-deterministic finalization might still be
>> useful. For example, if you have an open file associated with some
>> object, closing that file *eventually* might be good enough.
>
> Problem is that GC is not obliged to free all objects at all, let alone
> in specific order ;)
And if that's a problem, it's a problem.
If you're using GC, and it provides finalization hooks, *and* if
you have other resources (such as open files) such that you don't
care about the timing of freeing them any more than you care about
the timing of freeing memory, then the non-determinism won't be
a problem. Otherwise, it will.
My point is merely that your referring to such finalizers as
"useless" is an overstatement. There certainly are cases where
they're insufficient.
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-15 23:36 +0200
Re: High level C supercat@casperkitty.com - 2016-07-15 15:17 -0700
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 09:09 +0200
Re: High level C supercat@casperkitty.com - 2016-07-17 20:02 -0700
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-07-15 15:17 -0700
Re: High level C fir <profesor.fir@gmail.com> - 2016-07-31 23:55 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-15 23:27 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 09:13 +0200
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-16 02:07 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 11:07 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-16 03:29 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 13:40 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-17 11:57 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-16 11:30 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-16 03:43 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 13:53 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-16 07:49 -0700
Re: High level C Jean-Marc Bourguet <jm@bourguet.org> - 2016-07-16 17:08 +0200
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-16 09:09 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 16:26 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 18:05 +0200
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 20:15 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 23:44 +0200
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-07-23 19:39 +0000
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-23 22:58 +0200
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-07-27 14:52 +0000
Re: High level C Richard Heathfield <rjh@cpax.org.uk> - 2016-07-27 16:29 +0100
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-07-23 19:38 +0000
Re: High level C BartC <bc@freeuk.com> - 2016-07-16 14:17 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 13:46 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-17 12:05 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-17 11:03 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-17 03:39 -0700
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-17 18:20 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-17 14:00 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-17 23:13 +0530
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-17 20:14 +0200
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-17 20:14 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-17 20:45 +0100
Re: High level C Gareth Owen <gwowen@gmail.com> - 2016-07-17 21:00 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-18 09:48 +0530
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-18 00:55 -0700
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-18 22:25 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-18 11:40 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-18 05:05 -0700
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-18 22:59 +0530
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-18 22:50 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-18 19:07 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-19 11:53 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 11:15 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 14:00 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 15:01 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 15:26 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 15:57 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 17:13 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 18:14 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 19:20 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 19:46 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-20 02:44 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-20 10:59 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-20 03:07 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-21 01:44 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-21 18:58 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-21 17:20 +0100
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-21 20:52 +0100
Re: High level C BartC <bc@freeuk.com> - 2016-07-21 21:14 +0100
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-07-21 13:23 -0700
Re: High level C BartC <bc@freeuk.com> - 2016-07-21 21:50 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-22 12:52 +0200
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-22 04:03 -0700
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-22 23:56 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-22 20:09 +0100
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-22 23:49 +0530
Re: High level C BartC <bc@freeuk.com> - 2016-07-22 20:37 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-19 19:16 +0200
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 19:17 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-19 21:07 +0200
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-20 02:36 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-19 07:27 -0700
Re: High level C BartC <bc@freeuk.com> - 2016-07-19 16:27 +0100
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-19 08:43 -0700
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-19 19:14 +0100
Re: High level C Jean-Marc Bourguet <jm@bourguet.org> - 2016-07-18 10:08 +0200
Re: High level C Udyant Wig <udyant.wig@gmail.com> - 2016-07-18 23:04 +0530
Re: High level C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-16 10:18 +0100
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-07-23 19:26 +0000
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-25 09:21 -0700
Re: High level C luser droog <luser.droog@gmail.com> - 2016-07-25 10:19 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-28 10:31 -0700
Re: High level C luser droog <luser.droog@gmail.com> - 2016-07-28 21:13 -0700
Re: High level C supercat@casperkitty.com - 2016-07-29 09:05 -0700
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-07-29 09:30 -0700
Re: High level C supercat@casperkitty.com - 2016-07-29 10:08 -0700
Re: High level C Ike Naar <ike@iceland.freeshell.org> - 2016-07-29 17:57 +0000
Re: High level C supercat@casperkitty.com - 2016-07-29 11:50 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-31 07:16 -0700
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-07-31 14:34 +0000
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-31 14:55 -0700
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-08-01 03:10 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-01 07:40 -0700
Re: High level C Gareth Owen <gwowen@gmail.com> - 2016-08-01 19:43 +0100
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-01 10:21 -0500
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-08-03 13:14 +0000
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-05 08:40 -0700
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-08-05 09:28 -0700
Re: High level C fir <profesor.fir@gmail.com> - 2016-08-05 09:55 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-05 15:51 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-05 18:43 +0200
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-05 15:43 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 00:52 +0200
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-08-10 12:42 +0000
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-11 12:24 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-07-31 16:42 +0200
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-31 12:59 -0700
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-07-31 17:12 -0500
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-31 17:12 -0700
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-01 00:54 -0500
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-01 08:08 -0700
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-01 12:58 -0500
Re: High level C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-08-01 12:25 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-03 08:44 -0700
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-03 11:56 -0500
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-08-03 19:29 +0200
Re: High level C "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-03 13:45 -0400
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-03 13:23 -0500
Re: High level C BartC <bc@freeuk.com> - 2016-08-03 19:27 +0100
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-08-03 21:04 +0200
Re: High level C Gareth Owen <gwowen@gmail.com> - 2016-08-03 20:08 +0100
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-03 16:09 -0500
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-03 16:06 -0500
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-08-03 23:36 +0200
Re: High level C Les Cargill <lcargill99@comcast.com> - 2016-08-03 19:44 -0500
Re: High level C supercat@casperkitty.com - 2016-08-03 15:03 -0700
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-04 19:17 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-05 05:48 +0200
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-08-05 08:24 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-05 18:30 +0200
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-08-05 10:34 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-05 20:50 +0200
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-05 15:39 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 00:50 +0200
Re: High level C Keith Thompson <kst-u@mib.org> - 2016-08-05 17:08 -0700
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 02:23 +0200
Re: High level C raltbos@xs4all.nl (Richard Bos) - 2016-08-06 10:03 +0000
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 12:13 +0200
Re: High level C "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-06 11:10 -0400
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 17:40 +0200
Re: High level C "James R. Kuyper" <jameskuyper@verizon.net> - 2016-08-06 11:56 -0400
Re: High level C Melzzzzz <mel@zzzzz.com> - 2016-08-06 17:51 +0200
Re: High level C supercat@casperkitty.com - 2016-08-08 09:12 -0700
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-31 22:07 +0200
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-31 15:05 -0700
Re: High level C Ian Collins <ian-news@hotmail.com> - 2016-08-03 11:22 +1200
Re: High level C Tim Rentsch <txr@alumni.caltech.edu> - 2016-08-03 08:50 -0700
Re: High level C BartC <bc@freeuk.com> - 2016-07-16 01:12 +0100
Re: High level C Jerry Stuckle <jstucklex@attglobal.net> - 2016-07-15 20:16 -0400
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 09:17 +0200
Re: High level C Siri Cruise <chine.bleu@yahoo.com> - 2016-07-16 08:20 -0700
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-16 17:24 +0200
Re: High level C Siri Cruise <chine.bleu@yahoo.com> - 2016-07-16 09:24 -0700
Re: High level C carlglassberg@gmail.com - 2016-07-17 14:15 -0700
Re: High level C carlglassberg@gmail.com - 2016-07-17 14:22 -0700
Re: High level C jacobnavia <jacob@jacob.remcomp.fr> - 2016-07-17 23:58 +0200
Re: High level C fir <profesor.fir@gmail.com> - 2016-08-02 13:20 -0700
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