--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/barrier.cc	Wed Jul 30 18:09:13 2014 +0200
@@ -0,0 +1,44 @@
+/*
+ Copyright (C) 2014 Eugenio Gianniti <eugenio.gianniti@mail.polimi.it>
+
+ This program is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3 of the License, or (at your option) any later
+ version.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <dolfin.h>
+#include <octave/oct.h>
+#include "dolfin_compat.h"
+
+DEFUN_DLD (barrier, args, nargout,
+"-*- texinfo -*-\n\
+@deftypefn {Function File} {} \
+barrier ()\n\
+Set an MPI barrier.\n\
+@end deftypefn")
+{
+  octave_value retval;
+  int nargin = args.length ();
+
+  if (nargin > 0 || nargout > 0)
+    print_usage ();
+  else
+    {
+      dolfin::MPI::barrier (
+#ifdef LATEST_DOLFIN
+                            MPI_COMM_WORLD
+#endif
+                           );
+    }
+
+  return retval;
+}