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diff --git a/src/testbed/testbed_api_barriers.h b/src/testbed/testbed_api_barriers.h
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+/*
+  This file is part of GNUnet.
+  (C) 2008--2013 Christian Grothoff (and other contributing authors)
+
+  GNUnet 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, or (at your
+  option) any later version.
+
+  GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+  Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file testbed/testbed_api_barriers.h
+ * @brief interface for barriers API function that are used internally (not
+ *   exposed as user API)
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in> 
+ */
+
+#include "gnunet_testbed_service.h"
+
+
+/**
+ * Initialise a barrier and call the given callback when the required percentage
+ * of peers (quorum) reach the barrier OR upon error.
+ *
+ * @param controller the handle to the controller
+ * @param name identification name of the barrier
+ * @param quorum the percentage of peers that is required to reach the barrier.
+ *   Peers signal reaching a barrier by calling
+ *   GNUNET_TESTBED_barrier_reached().
+ * @param cb the callback to call when the barrier is reached or upon error.
+ *   Cannot be NULL.
+ * @param cls closure for the above callback
+ * @param echo GNUNET_YES to echo the barrier crossed status message back to the
+ *   controller
+ * @return barrier handle; NULL upon error
+ */
+struct GNUNET_TESTBED_Barrier *
+GNUNET_TESTBED_barrier_init_ (struct GNUNET_TESTBED_Controller *controller,
+                              const char *name,
+                              unsigned int quorum,
+                              GNUNET_TESTBED_barrier_status_cb cb, void *cls,
+                              int echo);