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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Is Text_IO.Put_Line() thread-safe?
Date: Sat, 16 Jun 2012 09:51:50 +0200
Organization: cbb software GmbH
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Date: 2012-06-16T09:51:50+02:00
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On Sat, 16 Jun 2012 08:04:47 +0200, J-P. Rosen wrote:

> Le 16/06/2012 04:00, BrianG a �crit :
>> On the Put_Line issue, why not simply wrap it in a protected object
> Because all IO's are potentially blocking operations.

And even if they would not be, one should keep protected actions as short
as possible.

> By all means, use a task and a rendezvous!

An alternative is a reentrant mutex seized and released by a controlled
holder object.

> Simple, no problem, it works.
> PO are for simple, relatively low level stuff (in general). Rendezvous
> are generally better for high level synchronization.

Yes, but also significantly slower. Usually some combination of both is the
best solution.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de