On Mon, 23 Nov 2009 10:39:28 -0800, George Bosilca <bosi...@eecs.utk.edu> wrote: > In the case of Open MPI we use pointers, which are different than int > on most cases
I just want to comment that Open MPI's opaque (to the user) pointers are significantly better than int because it offers type safety. That is, the compiler can distinguish between MPI_Comm, MPI_Group, MPI_Status, MPI_Op, etc., and warn you if you mix them up. When they are all typedef'd to int, you get no such warnings, and instead just get runtime errors/crashes. > (btw int is what MPICH is using I think). It is. Jed
