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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Ada platforms and pricing, was: Re: a new language, designed for
 safety !
Date: Thu, 26 Jun 2014 20:20:42 +0200
Organization: Ada @ Home
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Xref: news.eternal-september.org comp.lang.ada:20622
Date: 2014-06-26T20:20:42+02:00
List-Id: <comp.lang.ada>

Le Thu, 26 Jun 2014 12:04:47 +0200, G.B.  =

<rm-dash-bau-haus@dash.futureapps.de> a =C3=A9crit:

> On 26.06.14 04:50, Yannick Duch=C3=AAne (Hibou57) wrote:
>> When I was using C, I used to implement per=E2=80=91coroutine stack (=
with limit
>> check!, cheese) and stack=E2=80=91switching for that purpose, but you=
 can't do
>> it with Ada, as it does not allow this kind of low level hacking.
>
> Given that Ada allows hacking at a level lower than C
> ---address arithmetic is not restricted by the type
> of offsets, for example---what is it that you have been
> doing in C that you think cannot be done in Ada?

You can do low level with Ada (often better than with C), yes, except yo=
u  =

can't (and that's for good) interfere with the runtime as much easily as=
  =

you can with C. There is no setjump/longjump equivalent in Ada, and  =

switching between stacks allocated on the heap would be more hazardous  =

with an Ada compiler than with a C compiler.

Anyway, that trick I used and which is not at all recommendable for  =

serious works, was surely not portable (I can't remember what the C  =

compiler was=E2=80=A6 DOS or Windows specific).


-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity