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diff --git a/gruel/src/include/gruel/msg_accepter.h b/gruel/src/include/gruel/msg_accepter.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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_GRUEL_MSG_ACCEPTER_H
+#define INCLUDED_GRUEL_MSG_ACCEPTER_H
+
+#include <gruel/pmt.h>
+#include <boost/shared_ptr.hpp>
+
+namespace gruel {
+
+  /*!
+   * \brief Virtual base class that accepts messages
+   */
+  class msg_accepter
+  {
+  public:
+    msg_accepter() {};
+    virtual ~msg_accepter();
+
+    /*!
+     * \brief send \p msg to \p msg_accepter
+     *
+     * 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 msg) = 0;
+  };
+
+  typedef boost::shared_ptr<msg_accepter> msg_accepter_sptr;
+
+} /* namespace gruel */
+
+#endif /* INCLUDED_GRUEL_MSG_ACCEPTER_H */