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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_XSUB_HPP_INCLUDED__
+#define __ZMQ_XSUB_HPP_INCLUDED__
+
+#include "../include/zmq.h"
+
+#include "trie.hpp"
+#include "socket_base.hpp"
+#include "fq.hpp"
+
+namespace zmq
+{
+
+ class xsub_t : public socket_base_t
+ {
+ public:
+
+ xsub_t (class ctx_t *parent_, uint32_t tid_);
+ ~xsub_t ();
+
+ protected:
+
+ // Overloads of functions from socket_base_t.
+ void xattach_pipes (class reader_t *inpipe_, class writer_t *outpipe_,
+ const blob_t &peer_identity_);
+ int xsend (zmq_msg_t *msg_, int options_);
+ bool xhas_out ();
+ int xrecv (zmq_msg_t *msg_, int flags_);
+ bool xhas_in ();
+
+ private:
+
+ // Hook into the termination process.
+ void process_term (int linger_);
+
+ // Check whether the message matches at least one subscription.
+ bool match (zmq_msg_t *msg_);
+
+ // Fair queueing object for inbound pipes.
+ fq_t fq;
+
+ // The repository of subscriptions.
+ trie_t subscriptions;
+
+ // If true, 'message' contains a matching message to return on the
+ // next recv call.
+ bool has_message;
+ zmq_msg_t message;
+
+ // If true, part of a multipart message was already received, but
+ // there are following parts still waiting.
+ bool more;
+
+ xsub_t (const xsub_t&);
+ const xsub_t &operator = (const xsub_t&);
+ };
+
+}
+
+#endif
+