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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
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