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+/*
+ Copyright (c) 2007-2011 iMatix Corporation
+ Copyright (c) 2007-2011 Other 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_ROUTER_HPP_INCLUDED__
+#define __ZMQ_ROUTER_HPP_INCLUDED__
+
+#include <map>
+#include <vector>
+
+#include "socket_base.hpp"
+#include "blob.hpp"
+#include "msg.hpp"
+
+namespace zmq
+{
+
+ // TODO: This class uses O(n) scheduling. Rewrite it to use O(1) algorithm.
+ class router_t :
+ public socket_base_t
+ {
+ public:
+
+ router_t (class ctx_t *parent_, uint32_t tid_);
+ ~router_t ();
+
+ // Overloads of functions from socket_base_t.
+ void xattach_pipe (class pipe_t *pipe_, const blob_t &peer_identity_);
+ int xsend (class msg_t *msg_, int flags_);
+ int xrecv (class msg_t *msg_, int flags_);
+ bool xhas_in ();
+ bool xhas_out ();
+ void xread_activated (class pipe_t *pipe_);
+ void xwrite_activated (class pipe_t *pipe_);
+ void xterminated (class pipe_t *pipe_);
+
+ protected:
+
+ // Rollback any message parts that were sent but not yet flushed.
+ int rollback ();
+
+ private:
+
+ struct inpipe_t
+ {
+ class pipe_t *pipe;
+ blob_t identity;
+ bool active;
+ };
+
+ // Inbound pipes with the names of corresponging peers.
+ typedef std::vector <inpipe_t> inpipes_t;
+ inpipes_t inpipes;
+
+ // The pipe we are currently reading from.
+ inpipes_t::size_type current_in;
+
+ // Have we prefetched a message.
+ bool prefetched;
+
+ // Holds the prefetched message.
+ msg_t prefetched_msg;
+
+ // If true, more incoming message parts are expected.
+ bool more_in;
+
+ struct outpipe_t
+ {
+ class pipe_t *pipe;
+ bool active;
+ };
+
+ // Outbound pipes indexed by the peer names.
+ typedef std::map <blob_t, outpipe_t> outpipes_t;
+ outpipes_t outpipes;
+
+ // The pipe we are currently writing to.
+ class pipe_t *current_out;
+
+ // If true, more outgoing message parts are expected.
+ bool more_out;
+
+ router_t (const router_t&);
+ const router_t &operator = (const router_t&);
+ };
+
+}
+
+#endif