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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_XSUB_HPP_INCLUDED__
#define __ZMQ_XSUB_HPP_INCLUDED__
#include "socket_base.hpp"
#include "session_base.hpp"
#include "dist.hpp"
#include "fq.hpp"
#include "trie.hpp"
namespace zmq
{
class ctx_t;
class pipe_t;
class io_thread_t;
class xsub_t :
public socket_base_t
{
public:
xsub_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
~xsub_t ();
protected:
// Overloads of functions from socket_base_t.
void xattach_pipe (zmq::pipe_t *pipe_, bool subscribe_to_all_);
int xsend (zmq::msg_t *msg_);
bool xhas_out ();
int xrecv (zmq::msg_t *msg_);
bool xhas_in ();
void xread_activated (zmq::pipe_t *pipe_);
void xwrite_activated (zmq::pipe_t *pipe_);
void xhiccuped (pipe_t *pipe_);
void xpipe_terminated (zmq::pipe_t *pipe_);
private:
// Check whether the message matches at least one subscription.
bool match (zmq::msg_t *msg_);
// Function to be applied to the trie to send all the subsciptions
// upstream.
static void send_subscription (unsigned char *data_, size_t size_,
void *arg_);
// Fair queueing object for inbound pipes.
fq_t fq;
// Object for distributing the subscriptions upstream.
dist_t dist;
// The repository of subscriptions.
trie_t subscriptions;
// If true, 'message' contains a matching message to return on the
// next recv call.
bool has_message;
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
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