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/*
Copyright (c) 2007-2009 FastMQ Inc.
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_INCLUDED__
#define __ZMQ_SUB_INCLUDED__
#include <set>
#include <string>
#include "socket_base.hpp"
#include "yarray.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_);
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_);
int xsetsockopt (int option_, const void *optval_, size_t optvallen_);
int xsend (zmq_msg_t *msg_, int flags_);
int xflush ();
int xrecv (zmq_msg_t *msg_, int flags_);
private:
// Helper function to return one message choosed using
// fair queueing algorithm.
int fq (zmq_msg_t *msg_, int flags_);
// Inbound pipes, i.e. those the socket is getting messages from.
typedef yarray_t <class reader_t> in_pipes_t;
in_pipes_t in_pipes;
// Number of active inbound pipes. Active pipes are stored in the
// initial section of the in_pipes array.
in_pipes_t::size_type active;
// Index of the next inbound pipe to read messages from.
in_pipes_t::size_type current;
// Number of active "*" subscriptions.
int all_count;
// List of all prefix subscriptions.
typedef std::multiset <std::string> subscriptions_t;
subscriptions_t prefixes;
// List of all exact match subscriptions.
subscriptions_t topics;
sub_t (const sub_t&);
void operator = (const sub_t&);
};
}
#endif
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