1 files changed, 42 insertions, 0 deletions
diff --git a/src/boost/libs/mpi/example/cartesian_communicator.cpp b/src/boost/libs/mpi/example/cartesian_communicator.cpp
new file mode 100644
index 000000000..7b011041d
--- /dev/null
+++ b/src/boost/libs/mpi/example/cartesian_communicator.cpp
@@ -0,0 +1,42 @@
+//          Copyright Alain Miniussi 2014.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+// Authors: Alain Miniussi
+
+#include <vector>
+#include <iostream>
+
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/collectives.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/mpi/cartesian_communicator.hpp>
+
+namespace mpi = boost::mpi;
+// Curly brace init make this useless, but
+//  - Need to support obsolete like g++ 4.3.x. for some reason
+//  - Can't conditionnaly compile with bjam (unless you find 
+//  the doc, and read it, which would only make sense if you
+//  actually wan't to use bjam, which does not (make sense))
+typedef mpi::cartesian_dimension cd;
+
+int main(int argc, char* argv[])
+{
+  mpi::environment  env;
+  mpi::communicator world;
+  
+  if (world.size() != 24)  return -1;
+  mpi::cartesian_dimension dims[] = {cd(2, true), cd(3,true), cd(4,true)};
+  mpi::cartesian_communicator cart(world, mpi::cartesian_topology(dims));
+  for (int r = 0; r < cart.size(); ++r) {
+    cart.barrier();
+    if (r == cart.rank()) {
+      std::vector<int> c = cart.coordinates(r);
+      std::cout << "rk :" << r << " coords: " 
+                << c[0] << ' ' << c[1] << ' ' << c[2] << '\n';
+    }
+  }
+  return 0;
+}
+