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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_STREAM_HPP_INCLUDED__
+#define __ZMQ_STREAM_HPP_INCLUDED__
+
+#include <map>
+
+#include "router.hpp"
+
+namespace zmq
+{
+
+    class ctx_t;
+    class pipe_t;
+
+    class stream_t :
+        public socket_base_t
+    {
+    public:
+
+        stream_t (zmq::ctx_t *parent_, uint32_t tid_, int sid);
+        ~stream_t ();
+
+        //  Overloads of functions from socket_base_t.
+        void xattach_pipe (zmq::pipe_t *pipe_, bool subscribe_to_all_);
+        int xsend (zmq::msg_t *msg_);
+        int xrecv (zmq::msg_t *msg_);
+        bool xhas_in ();
+        bool xhas_out ();
+        void xread_activated (zmq::pipe_t *pipe_);
+        void xwrite_activated (zmq::pipe_t *pipe_);
+        void xpipe_terminated (zmq::pipe_t *pipe_);
+
+    private:
+        //  Generate peer's id and update lookup map
+        void identify_peer (pipe_t *pipe_);
+
+        //  Fair queueing object for inbound pipes.
+        fq_t fq;
+
+        //  True iff there is a message held in the pre-fetch buffer.
+        bool prefetched;
+
+        //  If true, the receiver got the message part with
+        //  the peer's identity.
+        bool identity_sent;
+
+        //  Holds the prefetched identity.
+        msg_t prefetched_id;
+
+        //  Holds the prefetched message.
+        msg_t prefetched_msg;
+
+        struct outpipe_t
+        {
+            zmq::pipe_t *pipe;
+            bool active;
+        };
+
+        //  Outbound pipes indexed by the peer IDs.
+        typedef std::map <blob_t, outpipe_t> outpipes_t;
+        outpipes_t outpipes;
+
+        //  The pipe we are currently writing to.
+        zmq::pipe_t *current_out;
+
+        //  If true, more outgoing message parts are expected.
+        bool more_out;
+
+        //  Peer ID are generated. It's a simple increment and wrap-over
+        //  algorithm. This value is the next ID to use (if not used already).
+        uint32_t next_peer_id;
+
+        stream_t (const stream_t&);
+        const stream_t &operator = (const stream_t&);
+    };
+
+}
+
+#endif