NAME
          pnet_input - Get pointer to input buffer

     SYNOPSIS
          #include <mpi.h>
          #include "pnet.h"

          void *pnet_input(const Pnet *pnet);

     DESCRIPTION
          Function returns pointer to input buffer. Function is
          implemented as a macro.  The argument of pnet_input is:

          pnet Pointer to initialized Pnet struct

     RETURN VALUE
          Upon successful completion pointer to input buffer is
          returned.

     AUTHORS
          For authors and contributors see AUTHORS file


     COPYRIGHT
          (C) Potsdam Institute for Climate Impact Research (PIK), see
          COPYRIGHT file


     SEE ALSO
          pnet_init(3), pnet_free(3), pnet_setup(3), pnet_hi(3),
          pnet_nodes(3)