From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,90108ed846e3f1bf
X-Google-Attributes: gid103376,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news1.google.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.posted.plusnet!news.posted.plusnet.POSTED!not-for-mail
NNTP-Posting-Date: Fri, 20 Feb 2009 04:18:22 -0600
Newsgroups: comp.lang.ada
Followup-To: comp.lang.ada
From: Robert_Matthews <ignored@ramatthews.free-online.co.uk>
Subject: Re: Language lawyer question: task activation
Date: Fri, 20 Feb 2009 10:18:35 +0000
References: 
 <ccf8fc4b-80e3-4732-84e3-16c4e2d10c3d@v39g2000pro.googlegroups.com>
User-Agent: KNode/0.99.01
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7Bit
Message-ID: <0Ludnf3mRdnyHgPUnZ2dnUVZ8vGdnZ2d@posted.plusnet>
X-Usenet-Provider: http://www.giganews.com
X-Trace: 
 sv3-xU45vA6Jbjk/BldbPwtkkovICLlgMvKIuDTv+PCoG52I0VLfF7j2JxP1lzUjtfIg1kyDflEOaoSdjxy!tWhFYqENHlG75OxoecXZEyJmIhlct6W5JgQCN/S+ceHTe1+iqRXBkuhE5ncT7HITMuR3PxT60PMp!If+SXbfSHA==
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
 properly
X-Postfilter: 1.3.39
Xref: g2news1.google.com comp.lang.ada:3710
Date: 2009-02-20T10:18:35+00:00
List-Id: <comp.lang.ada>

Adam Beneschan wrote:

> Should this program deadlock?  I don't think it should (and I think it
> should display "E1 accepted"), based on my understanding about when
> task activation is supposed to occur for the function result.  But
> perhaps there's something about the relation between task activation
> and masters that I don't understand.  Anyway, this hangs when I
> compile it with GNAT and run it---is this correct or not?
> 
>                                         -- thanks, Adam
> 
> with Text_IO;
> procedure Test is
> 
>     task type TType is
>         entry E1;
>     end TType;
> 
>     task body TType is
>     begin
>          accept E1 do
>             Text_IO.Put_Line ("E1 accepted");
>          end E1;
>     end TType;
> 
>     function Func return TType is
>     begin
>         return X : TType;
>     end Func;
> 
>     procedure Do_It (X : TType) is
>     begin
>         X.E1;
>     end Do_It;
> 
> begin
>     Do_It (Func);
> end Test;

But isn't there another issue here: task types are limited, therefore Func 
is a constructor function, but in what object does it construct its returned
value?

Robert