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From: kilgallen@eisner.decus.org (Larry Kilgallen)
Subject: Re: Y21C Bug
Date: 2000/01/06
Message-ID: <2000Jan6.141127.1@eisner>#1/1
X-Deja-AN: 569213411
References: <84nqbo$q28$1@nnrp1.deja.com> <wcc66x7w220.fsf@world.std.com>
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Organization: LJK Software
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Newsgroups: comp.lang.ada
Date: 2000-01-06T00:00:00+00:00
List-Id: <comp.lang.ada>

In article <wcc66x7w220.fsf@world.std.com>, Robert A Duff <bobduff@world.std.com> writes:
> Robert Dewar <robert_dewar@my-deja.com> writes:
> 
>> 1. The ability to declare very large areas of memory with
>> commit-on-use semantics. There are many uses of this. I have
>> the feeling that a lot of programmers still don't understand
>> commit-on-use.
> 
> Commit on use is indeed very cool.
> 
> Do you know which operating systems support it?

If by "use" you mean "write", a VMS demand-zero page would seem
close to what you are looking for.  Having been near a Unix programmer
trying to deal with memory mapping, I gather Unix systems can do the
same sorts of things, but using different calls for each brand of Unix.

Larry Kilgallen