[Pharo-project] [squeak-dev] [ANN] Atomic collections.

Stéphane Ducasse stephane.ducasse at inria.fr
Sun Oct 17 05:00:56 EDT 2010


thanks
I would really like to have some solid basis for such kind of issue in pharo.

Stef
On Oct 16, 2010, at 8:20 AM, Igor Stasenko wrote:

> Hello,
> 
> as a result of recently happened discussion about atomic operations,
> i implemented two kinds of thread-safe queues FIFO and LIFO,
> which using atomic operations, instead of semaphore to add/remove items.
> 
> You may review it by loading the code from SqueakSource:
> 
> MCHttpRepository
>    location: 'http://www.squeaksource.com/Atomics'
>    user: ''
>    password: ''
> 
> 
> FIFOQueue scales much better than SharedQueue, and after some
> additional testing can fully replace it.
> 
> I tested FIFOQueue by replacing a SharedQueue class for EventSensor (a
> core system part, responsible for delivering events).
> In attached file you can find a patch, which will make your sensor to
> work with FIFOQueue, after you save image,
> or do 'EventSensor install'.
> 
> There are also a heavy-concurrency tests in corresponding test
> classes, which is passing ok.
> 
> Concurrency is highly complex field, thus i won't be surprised if code
> still contains a bugs.
> 
> Code license is MIT, moreover a repository is publicly writeable, so
> if you wanna add tests, benchmarks, fixes,
> or implement new kind of lock-free container, feel free to do it.
> 
> Any feedback is welcome.
> 
> 
> -- 
> Best regards,
> Igor Stasenko AKA sig.
> <sensor-queue-patch.1.cs>





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