Make access to coresponding collective communication possible.

[[Imported from SVN: r5254]]

common/mpihelper.hh

@@ -5,8 +5,10 @@
 #define DUNE_MPIHELPER
 
 #include <cassert>
+#include "collectivecommunication.hh"
 #if HAVE_MPI
 #include "mpi.h"
+#include "mpicollectivecommunication.hh"
 #endif
 
 #include "stdstreams.hh"
@@ -87,6 +89,12 @@ namespace Dune
       return -1;
     }
 
+    static CollectiveCommunication<MPICommunicator>
+    getCollectiveCommunication()
+    {
+      return CollectiveCommunication<MPICommunicator>(getCommunicator());
+    }
+
     /**
      * @brief Get the singleton instance of the helper.
      *
@@ -155,7 +163,11 @@ namespace Dune
     static MPICommunicator getCommunicator(){
       return MPI_COMM_WORLD;
     }
-
+    static CollectiveCommunication<MPICommunicator>
+    getCollectiveCommunication()
+    {
+      return CollectiveCommunication<MPICommunicator>(getCommunicator());
+    }
     /**
      * @brief Get the singleton instance of the helper.
      *