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Re: Temporary memory

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In article <5ce8cb00a3bob@sick-of-spam.invalid>,
   Bob Latham <bob@sick-of-spam.invalid> wrote:
> In article <5ce8c3e7b9News04@avisoft.f9.co.uk>,
>    Martin <News04@avisoft.f9.co.uk> wrote:

> > What language are you using?
> Basic assembler, I somehow feel I should apologise for that.

Not if you are up for the increased development and maintenance times.
And incompatibility with 64-bits!

> > You could...
> I'm looking for memory that I can "claim?"  (2MB-ish) and release
> again with ease and has easy direct addressable space.
> My feelings about these options are based on poor knowledge I'll
> admit but

> > - allocate a large enough slotsize when your app starts.
> This particular job is one of many my application performs. It will
> not be used often and so a big claim at the start does not seem
> ideal to me.

Is the 'job' a single-tasking program, or a Wimp task?
Claiming a large area at the start of an infrequently used job is
fine ... unless perhaps it runs for a very long time.
But 2MB is not large. This is virtual memory, not real stuff!

> > - change slotsize dynamically using SWI Wimp_SlotSize.
> I *think* that limit has got much higher with OS5 and it may do the
> job but I'm sure I've played with extending a app space in the past
> and I didn't enjoy the experience. :-)

The limit was 28MB even before RO5, now even higher. 
I frequently use 10's megabytes!

Just a matter of keeping track of the start and end addresses of your
extra space, and ensuring you do not write outside those limits!

> > - set up a Dynamic Area and use that.
> I may have done that many years ago but can't remember what's
> involved but it does have the most appeal with my shallow knowledge.
> Is it hard to do?

No - use OS_DynamicArea to create (and remove) an area. 

> I've just found some info in PRM5a, I'm reading and understanding
> some of it. :-)

> > - claim some RMA, but probably not a good idea these days.
> I didn't realize or forgotten that was different from Dynamic Area.

-- 
Martin Avison 
Note that unfortunately this email address will become invalid
without notice if (when) any spam is received. 

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Thread

Temporary memory Bob Latham <bob@sick-of-spam.invalid> - 2026-06-14 09:56 +0100
  Re: Temporary memory Martin <News04@avisoft.f9.co.uk> - 2026-06-14 11:24 +0100
    Re: Temporary memory Bob Latham <bob@sick-of-spam.invalid> - 2026-06-14 12:41 +0100
      Re: Temporary memory Martin <News04@avisoft.f9.co.uk> - 2026-06-14 13:13 +0100
        Re: Temporary memory Bob Latham <bob@sick-of-spam.invalid> - 2026-06-14 14:51 +0100
          Re: Temporary memory Martin <News04@avisoft.f9.co.uk> - 2026-06-14 15:28 +0100

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