Added the Parallel class and the ForEach method in it

[larkliy]

[m910q]

I tested it, but had some issues. Probably related to the Task implementation. It works fine in debug, but not release builds. The following seems to have an infinite loop going:

        int[2] items = .(0, 1);
        Parallel.ForEach<int>(items, scope (item) => { });

Some other thoughts on the code:

• If this goes into the corlib, it would be nice having it be available on non-Windows as well (Maybe use Platform.BfpSystem_GetNumLogicalCPUs()?)
• tasks can use scope instead of new. task can use scope::

[bfiete]

I think it would be nice for someone to make a parallels library, but I'm not really thinking this is something that needs to go into corlib at the moment.

System.Threading.Tasks is uncooked and probably should be taken out of corlib as it stands, even...

[disarray2077]

System.Threading.Tasks is uncooked and probably should be taken out of corlib as it stands, even...

Yeah, and to expand on that, I have also written a parallel class before, and IIRC the Task class has some thread race issues. For my project, I ended up just writing my own simple task class using WaitEvent.