[Carpet] [Carpet-darcs] Carpet: Make mode changing macros usable from outside the namespace Carpet

[Erik Schnetter]

On Oct 13, 2006, at 02:02:08, Luca Baiotti wrote:
> Hi Erik,
>
> can you briefly explain what is the difference wrt before and how  
> to use
> the new macros? (Or is it documented somewhere?)

The main difference of the patch you cited is that you do not need  
any more the #include "carpet.hh" before using the macros; you can  
just use them.

Another, earlier difference is that you now have to specify whether  
the looping macros should loop over grid functions or grid arrays.   
You write e.g.

BEGIN_LOCAL_COMPONENT_LOOP (cctkGH, CCTK_GF) {

   // code

} END_LOCAL_COMPONENT_LOOP;

to loop over grid functions, indicated by the new argument CCTK_GF.   
If you want to loop over grid arrays (or grid scalars), use  
CCTK_ARRAY instead.

Having this distinctions explicit allows more generic and more  
efficient processor distributions; it is now e.g. possible to have a  
different number of components (per patch) on each processor.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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