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Groups > comp.lang.forth > #25397

Re: Relocatable Blocks

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Ian van Breda <igvb@btopenworld.com> writes:
> I suggest that the equivalent definitions for ALLOCATE, FREE and RESIZE be
> defined in the standard...
> NEW-HANDLE ( u -- hndl ior)..
> FREE-HANDLE ( hndl -- ior)..
> RESIZE-HANDLE ( hndl u -- ior)..

There doesn't seem to be a way specified to access data in a relocatable
block--are you saying the application should just treat hndl as
something like an indirect pointer that can change at any time?  How is
that supposed to interact with multitasking?

Do you really need dynamic resizing for Forth stacks?  I thought very
deep stacks weren't really in the Forth spirit.  In any case, since only
the top few stack elements are directly accessible, resize can be done
completely behind the scenes, by moving the deeper elements off to some
other place in memory, keeping the top elements at fixed addresses.

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Relocatable Blocks Ian van Breda <igvb@btopenworld.com> - 2013-08-25 20:21 +0100
  Re: Relocatable Blocks Paul Rubin <no.email@nospam.invalid> - 2013-08-25 14:04 -0700
    Re: Relocatable Blocks Ian van Breda <igvb@btopenworld.com> - 2013-08-29 19:55 +0100
  Re: Relocatable Blocks albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-08-26 11:34 +0000
    Re: Relocatable Blocks Hans Bezemer <the.beez.speaks@gmail.com> - 2013-08-26 14:58 +0200
      Re: Relocatable Blocks Hans Bezemer <the.beez.speaks@gmail.com> - 2013-08-26 15:30 +0200
      Re: Relocatable Blocks anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-08-26 14:33 +0000
        Re: Relocatable Blocks Ian van Breda <igvb@btopenworld.com> - 2013-08-29 20:22 +0100
  Re: Relocatable Blocks Mark Wills <markrobertwills@yahoo.co.uk> - 2013-08-26 07:08 -0700

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