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diff --git a/gnuradio-runtime/include/messages/msg_accepter.h b/gnuradio-runtime/include/messages/msg_accepter.h
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+++ b/gnuradio-runtime/include/messages/msg_accepter.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2009,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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.
+ *
+ * GNU Radio 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef INCLUDED_MSG_ACCEPTER_H
+#define INCLUDED_MSG_ACCEPTER_H
+
+#include <gr_runtime_api.h>
+#include <pmt/pmt.h>
+#include <boost/shared_ptr.hpp>
+
+namespace gr {
+  namespace messages {
+
+    /*!
+     * \brief Virtual base class that accepts messages
+     */
+    class GR_RUNTIME_API msg_accepter
+    {
+    public:
+      msg_accepter() {};
+      virtual ~msg_accepter();
+
+      /*!
+       * \brief send \p msg to \p msg_accepter on port \p which_port
+       *
+       * Sending a message is an asynchronous operation.  The \p post
+       * call will not wait for the message either to arrive at the
+       * destination or to be received.
+       */
+      virtual void post(pmt::pmt_t which_port, pmt::pmt_t msg) = 0;
+    };
+
+    typedef boost::shared_ptr<msg_accepter> msg_accepter_sptr;
+
+  } /* namespace messages */
+} /* namespace gr */
+
+#endif /* INCLUDED_MSG_ACCEPTER_H */