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/*
Copyright (c) 2007-2010 iMatix Corporation
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ZMQ_SUB_HPP_INCLUDED__
#define __ZMQ_SUB_HPP_INCLUDED__
#include "../include/zmq.h"
#include "prefix_tree.hpp"
#include "socket_base.hpp"
#include "fq.hpp"
namespace zmq
{
class sub_t : public socket_base_t
{
public:
sub_t (class app_thread_t *parent_);
~sub_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_);
void xdetach_inpipe (class reader_t *pipe_);
void xdetach_outpipe (class writer_t *pipe_);
void xkill (class reader_t *pipe_);
void xrevive (class reader_t *pipe_);
void xrevive (class writer_t *pipe_);
int xsetsockopt (int option_, const void *optval_, size_t optvallen_);
int xsend (zmq_msg_t *msg_, int flags_);
int xrecv (zmq_msg_t *msg_, int flags_);
bool xhas_in ();
bool xhas_out ();
private:
// 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.
prefix_tree_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;
sub_t (const sub_t&);
void operator = (const sub_t&);
};
}
#endif
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