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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Properties
Date: Sat, 04 Dec 2010 17:43:30 +0000
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Date: 2010-12-04T17:43:30+00:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Thu, 2 Dec 2010 01:57:49 -0800 (PST), Maciej Sobczak wrote:
>
>> On Dec 1, 10:45 pm, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
>> wrote:
>> 
>>>> And how is this any different from, say, printing exactly the same log
>>>> messages on standard output?
>>>
>>> It is just same. You can safely call Put_Line from any task.
>> 
>> Wrong (AARM Annex A, 3.a):
>> 
>> "simultaneous calls to Text_IO.Put will work properly, so long as they
>> are going to two different files. On the other hand, simultaneous
>> output to the same file constitutes erroneous use of shared
>> variables."
>
> OK, I let us consider only "reasonable" implementations of Put.
>
>>> But if you do
>>> Set_Text in GTK, that will crash your program.
>> 
>> You mean - that will lead to erroneous execution? So it is exactly the
>> same as with printing on standard output.
>
> I don't know if there is an Ada implementation working this way.
>
>> Why do you expect to get better guarantees from GUI than from stdout?
>
> Because in all Ada compilers I used so far this was safe.

Then I don't think you can have used GNAT on VxWorks!