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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_PIPE_WRITER_HPP_INCLUDED__
#define __ZMQ_PIPE_WRITER_HPP_INCLUDED__
#include "object.hpp"
#include "stdint.hpp"
namespace zmq
{
class pipe_writer_t : public object_t
{
// Context is a friend so that it can create & destroy the writer.
// By making constructor & destructor private we are sure that nobody
// except context messes with writers.
friend class context_t;
public:
// Set & get index in the associated demux object.
void set_demux (struct i_demux *demux_);
void set_index (int index_);
int get_index ();
// Writes a message to the underlying pipe. Returns false if the
// message cannot be written to the pipe at the moment.
bool write (struct zmq_msg *msg_);
// Flush the messages downsteam.
void flush ();
// Asks pipe to destroy itself.
void terminate ();
private:
pipe_writer_t (class object_t *parent_, class pipe_t *pipe_,
class object_t *peer_, uint64_t hwm_, uint64_t lwm_);
~pipe_writer_t ();
void process_head (uint64_t bytes_);
void process_terminate ();
// The underlying pipe.
class pipe_t *pipe;
// Pipe reader associated with the other side of the pipe.
class object_t *peer;
// Associated demux object.
struct i_demux *demux;
// Index in the associated demux object.
int index;
// High and low watermarks for in-memory storage (in bytes).
uint64_t hwm;
uint64_t lwm;
// Positions of head and tail of the pipe (in bytes).
uint64_t head;
uint64_t tail;
pipe_writer_t (const pipe_writer_t&);
void operator = (const pipe_writer_t&);
};
}
#endif
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