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+/*
+    Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_FQ_HPP_INCLUDED__
+#define __ZMQ_FQ_HPP_INCLUDED__
+
+#include "array.hpp"
+#include "pipe.hpp"
+#include "msg.hpp"
+
+namespace zmq
+{
+
+    //  Class manages a set of inbound pipes. On receive it performs fair
+    //  queueing so that senders gone berserk won't cause denial of
+    //  service for decent senders.
+
+    class fq_t
+    {
+    public:
+
+        fq_t ();
+        ~fq_t ();
+
+        void attach (pipe_t *pipe_);
+        void activated (pipe_t *pipe_);
+        void pipe_terminated (pipe_t *pipe_);
+
+        int recv (msg_t *msg_);
+        int recvpipe (msg_t *msg_, pipe_t **pipe_);
+        bool has_in ();
+
+    private:
+
+        //  Inbound pipes.
+        typedef array_t <pipe_t, 1> pipes_t;
+        pipes_t pipes;
+
+        //  Number of active pipes. All the active pipes are located at the
+        //  beginning of the pipes array.
+        pipes_t::size_type active;
+
+        //  Index of the next bound pipe to read a message from.
+        pipes_t::size_type current;
+
+        //  If true, part of a multipart message was already received, but
+        //  there are following parts still waiting in the current pipe.
+        bool more;
+
+        fq_t (const fq_t&);
+        const fq_t &operator = (const fq_t&);
+    };
+
+}
+
+#endif