NAME
          pnet_init - Initialize Pnet datatype

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

          Pnet *pnet_init(MPI_Comm comm, MPI_Datatype datatype, int nodes);

     DESCRIPTION
          The Pnet library is used for MPI parallelization of
          networks. The function has to be called after the
          initialization of MPI. The arguments of pnet_init are:

          comm MPI communicator

          datatype
               MPI datatype network for data transfer

          nodes
               Number of nodes in the network.

     RETURN VALUE
          Upon successful completion of pnet_init a pointer to
          allocated Pnet struct is returned and NULL in case of
          failure.


     AUTHORS
          For authors and contributors see AUTHORS file


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


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