Re: Ada and OpenMP

["Rego, P." <pvrego@gmail.com>]

Em quinta-feira, 7 de março de 2013 19h22min03s UTC-3, Peter C. Chapin  escreveu:
> OpenMP is a different animal than Ada tasks. It provides fine grained 
> parallelism where, for example, it is possible to have the compiler 
> automatically parallelize a loop. In C:
> #pragma omp parallel for
> for( i = 0; i < MAX; ++i ) {
>    array[i]++;
> }
> The compiler automatically splits the loop iterations over an 
> "appropriate" number of threads (probably based on the number of cores).
> In Ada one might write, perhaps
> pragma OMP(Parallel_For)
> for I in 1 .. MAX loop
>    A(I) := A(I) + 1
> end loop;
> Doing this with Ada tasks in such a way that it uses an optimal number 
> of threads on each execution (based on core count) would be much more 
> complicated, I should imagine. Please correct me if I'm wrong!
> OpenMP has various other features, some of which could be done naturally 
> with tasks, but much of what OpenMP is about is semi-automatic fine 
> grained parallelization. It is to Ada tasking what Ada tasking is to the 
> explicit handling of locks, etc.
> Peter

Yes, that's the idea.