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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_DIST_HPP_INCLUDED__
#define __ZMQ_DIST_HPP_INCLUDED__
#include <vector>
#include "array.hpp"
#include "pipe.hpp"
namespace zmq
{
class pipe_t;
class msg_t;
// Class manages a set of outbound pipes. It sends each messages to
// each of them.
class dist_t
{
public:
dist_t ();
~dist_t ();
// Adds the pipe to the distributor object.
void attach (zmq::pipe_t *pipe_);
// Activates pipe that have previously reached high watermark.
void activated (zmq::pipe_t *pipe_);
// Mark the pipe as matching. Subsequent call to send_to_matching
// will send message also to this pipe.
void match (zmq::pipe_t *pipe_);
// Mark all pipes as non-matching.
void unmatch ();
// Removes the pipe from the distributor object.
void pipe_terminated (zmq::pipe_t *pipe_);
// Send the message to the matching outbound pipes.
int send_to_matching (zmq::msg_t *msg_);
// Send the message to all the outbound pipes.
int send_to_all (zmq::msg_t *msg_);
bool has_out ();
private:
// Write the message to the pipe. Make the pipe inactive if writing
// fails. In such a case false is returned.
bool write (zmq::pipe_t *pipe_, zmq::msg_t *msg_);
// Put the message to all active pipes.
void distribute (zmq::msg_t *msg_);
// List of outbound pipes.
typedef array_t <zmq::pipe_t, 2> pipes_t;
pipes_t pipes;
// Number of all the pipes to send the next message to.
pipes_t::size_type matching;
// Number of active pipes. All the active pipes are located at the
// beginning of the pipes array. These are the pipes the messages
// can be sent to at the moment.
pipes_t::size_type active;
// Number of pipes eligible for sending messages to. This includes all
// the active pipes plus all the pipes that we can in theory send
// messages to (the HWM is not yet reached), but sending a message
// to them would result in partial message being delivered, ie. message
// with initial parts missing.
pipes_t::size_type eligible;
// True if last we are in the middle of a multipart message.
bool more;
dist_t (const dist_t&);
const dist_t &operator = (const dist_t&);
};
}
#endif
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