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NNTP-Posting-Date: Sat, 23 Apr 2011 06:17:06 -0500
From: Peter C. Chapin <PChapin@vtc.vsc.edu>
Newsgroups: comp.lang.ada
Subject: Re: If not Ada, what else...
Date: Sat, 23 Apr 2011 07:17:01 -0400
Organization: Vermont Technical College
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Date: 2011-04-23T07:17:01-04:00
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On Sat, 23 Apr 2011 11:55:56 +0200, Georg Bauhaus
<rm.dash-bauhaus@futureapps.de> wrote:

>On 4/23/11 4:20 AM, Peter C. Chapin wrote:
>
>> // This method operates on a sequence of type T.
>> def someMethod[T](data: Seq[T]) = {
>>     for (item<- data par) {
>>       // Parallelized loop. Iterations are spread over multiple cores.
>>     }
>> }
>>
>> In the above code 'par' is actually a method being applied to 'data.' The
>> for loop ends up being parallelized not because the compiler treats it in a
>> special way, but rather because of the behavior of the 'par' method.
>
>Would 'par' be a normal method or would the programmer
>make sure that it operates nicely in parallel, e.g.
>does not mess with "shared" variables?

'par' is a method provided by the collections library. The programmer is
responsible for making sure the loop body is parallel-safe.

Peter