On Sat, Jun 2, 2012 at 5:04 AM, Rodrique Djonkou <djon...@gmail.com> wrote:
> Dear Josh
>
> Thanks you very much for the help you provide.
>
> Basically, I have many files and I need to apply an algorithm in each pair
> of these files. (to come out with a matrix of result)
> each file has a number, and I would specify for each thread which pair of
> file it should compute.
>
> I have x threads, and I want to build for each point, a list of points of
> the matrix that he should compute.
> e.g. I have a matrix of 2x2, with 3 threads,
> I want that the first thread computes the coordinates (0,0) ; (0,2) and
> (2,1),
> the second thread computes the coordinates (1,1) ; (1,0) and (2,0)
> and the last thread computes the coordinates (2,2); (1,2) and (0,1)
>
> For that I want three region R1, R2, R3 where each region contains the
> specified points
> then each thread could take the region and just do a for(p:Point in R) ....
>
> Hope I'm not confuse.
> Thanks for your help !
>
> Rodrique D.
>
>
>
>
> Hi Rodrique,
>
> addition and subtraction (or more formally, union and difference) are
> not currently defined on the Region class.
>
> These operations were defined in previous versions of X10 -- you can see
> the code commented out in x10/array/Region.x10 -- but when the Array
> library was rewritten in X10 2.1 they proved difficult to implement with
> the appropriate combination of generality and performance. I believe
> there are plans to re-implement them but they have not been a high priority.
>
> What use case did you have in mind? It may be possible to come up with
> an algorithm that achieves the same thing without these operations, for
> now. Can you provide pseudocode?
>
> Cheers,
>
> Josh
>
> On 30/05/12 07:09, Rodrique Djonkou wrote:
> > Dear,
> >
> > Thanks you very much for the help your provide.
> >
> > Please how could I made the addition and the soustraction of two regions ?
> >
> > Thanks for your help
> >
> > Rodrique
>
>
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