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Groups > comp.lang.forth > #27167

Re: Reclaiming Allocated Memory

From Bernd Paysan <bernd.paysan@gmx.de>
Newsgroups comp.lang.forth
Subject Re: Reclaiming Allocated Memory
Date 2013-12-06 17:30 +0100
Organization 1&1 Internet AG
Message-ID <l7su3a$jv7$1@online.de> (permalink)
References <5293458b$0$296$14726298@news.sunsite.dk> <2013Dec4.174638@mips.complang.tuwien.ac.at> <52a066dc$0$302$14726298@news.sunsite.dk> <2013Dec5.191410@mips.complang.tuwien.ac.at> <52a19fc6$0$302$14726298@news.sunsite.dk>

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Doug Hoffman wrote:
> e) RESIZE may not be not available without even more effort (extra
> indirection?  manual copying of contents from old to new?).

In a simple allocater like the one for region based memory, you can shrink 
all objects in place, and to grow them, you need to copy them to a new 
location, unless they are the last allocated object (in which case growing 
them is almost for free).

Of course if you want to access objects that can resize, you need a pointer 
for that, and you need to adjust that pointer with the return value of 
resize (the new location).

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

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Thread

Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-11-25 07:41 -0500
  Re: Reclaiming Allocated Memory Paul Rubin <no.email@nospam.invalid> - 2013-11-25 07:04 -0800
    Re: Reclaiming Allocated Memory albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-25 16:16 +0000
      Re: Reclaiming Allocated Memory Paul Rubin <no.email@nospam.invalid> - 2013-11-25 09:03 -0800
        Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-11-26 06:30 -0500
          Re: Reclaiming Allocated Memory AKK <akk@nospam.org> - 2013-11-26 13:07 +0100
    Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-11-26 05:11 -0500
  Re: Reclaiming Allocated Memory anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-04 16:46 +0000
    Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-12-05 06:43 -0500
      Re: Reclaiming Allocated Memory Paul Rubin <no.email@nospam.invalid> - 2013-12-05 06:30 -0800
        Re: Reclaiming Allocated Memory albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-05 14:37 +0000
          Re: Reclaiming Allocated Memory Paul Rubin <no.email@nospam.invalid> - 2013-12-05 07:21 -0800
        Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-12-06 04:57 -0500
          Re: Reclaiming Allocated Memory Paul Rubin <no.email@nospam.invalid> - 2013-12-06 07:38 -0800
            Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-12-07 06:14 -0500
      Re: Reclaiming Allocated Memory anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-05 18:14 +0000
        Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-12-06 04:58 -0500
          Re: Reclaiming Allocated Memory Bernd Paysan <bernd.paysan@gmx.de> - 2013-12-06 17:30 +0100
            Re: Reclaiming Allocated Memory Doug Hoffman <glidedog@gmail.com> - 2013-12-07 05:59 -0500
              Re: Reclaiming Allocated Memory anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-07 11:57 +0000
                Re: Reclaiming Allocated Memory albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-07 17:48 +0000
                Re: Reclaiming Allocated Memory Bernd Paysan <bernd.paysan@gmx.de> - 2013-12-07 19:15 +0100
                Re: Reclaiming Allocated Memory anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-09 13:45 +0000
          Re: Reclaiming Allocated Memory anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-06 17:42 +0000

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