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From: "Alex R. Mosteo" <alejandro@mosteo.invalid>
Newsgroups: comp.lang.ada
Subject: Re: C++ primer on multithreading
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Date: Wed, 20 Apr 2011 15:04:06 +0200
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Date: 2011-04-20T15:04:06+02:00
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Maciej Sobczak wrote:

> On Apr 20, 12:45 pm, "Alex R. Mosteo" <alejan...@mosteo.invalid>
> wrote:
> 
>> I need to do some multi-threading stuff, in the sense that I will need
>> the equivalent of a protected object with some conditional blocking
>> entries.
> 
> This is not enough. What are you going to do with these entries? How
> many threads will use the same entry? How many entries will be used at
> a time by a single thread?

Not many threads involved, and I have been really not very explicit. 
Basically I need a protected queue with blocking semantics; several 
writters, one consumer.

Also more generally, I wondered too if there's some ready-to-use protected 
stuff in C++ that spares me dealing with mutexes to emulate a synchronized 
interface.

> If you don't try to reimplement the Ada semantics in full (select
> statement, requeue, anyone? :-) ), then conditional variables are
> sufficient to implement typical multithreading patterns - this can be
> nicely encapsulated by the "protected object" interface.

No, I don't want the full boat :) Also I wouldn't want to fall in the 
inverse trap of what's so frequently touted here of writing C in Ada. So any 
pointers on what are considered best practices nowadays in C++ for 
multithreading are welcome too.

> Boost is a good quality wrapper for system services and therefore
> useful for portability, but brings a whole lot of dependencies with it
> - it might or might not be of concern.

That's no problem. I will be using stock debian systems, so as long as it's 
there...

Alex.

> 
> --
> Maciej Sobczak * http://www.msobczak.com * http://www.inspirel.com