--- /dev/null
+/* Copyright (c) 2010-2015. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef SMPI_TOPO_HPP_INCLUDED
+#define SMPI_TOPO_HPP_INCLUDED
+
+#include "private.h"
+
+
+namespace simgrid{
+namespace SMPI{
+
+class Topo {
+ protected:
+ MPI_Comm m_comm;
+};
+
+
+class Cart: public Topo {
+ private:
+ int m_nnodes;
+ int m_ndims;
+ int *m_dims;
+ int *m_periodic;
+ int *m_position;
+ public:
+ Cart(int ndims);
+ ~Cart();
+ Cart(MPI_Comm comm_old, int ndims, int dims[], int periods[], int reorder, MPI_Comm *comm_cart);
+ Cart* sub(const int remain_dims[], MPI_Comm *newcomm) ;
+ int coords(int rank, int maxdims, int coords[]) ;
+ int get(int maxdims, int* dims, int* periods, int* coords);
+ int rank(int* coords, int* rank);
+ int shift(int direction, int disp, int *rank_source, int *rank_dest) ;
+ int dim_get(int *ndims);
+};
+
+
+class Graph: public Topo {
+ private:
+ int m_nnodes;
+ int m_nedges;
+ int *m_index;
+ int *m_edges;
+ public:
+ Graph();
+ ~Graph();
+};
+
+class Dist_Graph: public Topo {
+ private:
+ int m_indegree;
+ int *m_in;
+ int *m_in_weights;
+ int m_outdegree;
+ int *m_out;
+ int *m_out_weights;
+ int m_is_weighted;
+ public:
+ Dist_Graph();
+ ~Dist_Graph();
+};
+
+/*
+ * This is a utility function, no need to have anything in the lower layer for this at all
+ */
+extern int Dims_create(int nnodes, int ndims, int dims[]);
+
+}
+}
+
+
+#endif
