How to get MPI_COMM_WORLD
 

Hello everybody,

I'm trying to include an external solver to OpenFOAM and therefore I need to know the communication's type OpenFoam uses. In PStream.C I see it is MPI_COMM_WORLD, but how am I able to access the value of MPI_COMM_WORLD ?
Does anybody know how to get this information ?

Thanks a lot,

Sebi

If you have to ask for THAT kind of information, I wish you good luck. You will find that value in some file called mpi.h (or similar) on your machine. See also http://en.wikipedia.org/wiki/Message_Passing_Interface for what that is. Anyway. MPI is only one possible layer underneath the PStream-layer