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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/>.
*/
#include "../include/zmq.h"
#include "pipe_reader.hpp"
#include "pipe.hpp"
#include "err.hpp"
#include "i_mux.hpp"
zmq::pipe_reader_t::pipe_reader_t (object_t *parent_, pipe_t *pipe_,
uint64_t hwm_, uint64_t lwm_) :
object_t (parent_),
pipe (pipe_),
peer (NULL),
mux (NULL),
index (-1),
hwm (hwm_),
lwm (lwm_),
head (0),
tail (0),
last_sent_head (0)
{
}
void zmq::pipe_reader_t::set_peer (object_t *peer_)
{
peer = peer_;
}
zmq::pipe_reader_t::~pipe_reader_t ()
{
}
void zmq::pipe_reader_t::set_mux (i_mux *mux_)
{
mux = mux_;
}
void zmq::pipe_reader_t::set_index (int index_)
{
index = index_;
}
int zmq::pipe_reader_t::get_index ()
{
return index;
}
void zmq::pipe_reader_t::process_tail (uint64_t bytes_)
{
tail = bytes_;
mux->reactivate (this);
}
bool zmq::pipe_reader_t::read (struct zmq_msg *msg_)
{
// Read a message.
if (!pipe->read (msg_)) {
mux->deactivate (this);
return false;
}
// If successfull, adjust the head of the pipe.
head += zmq_msg_size (msg_);
// If pipe writer wasn't notified about the head position for long enough,
// notify it.
if (head - last_sent_head >= hwm - lwm) {
send_head (peer, head);
last_sent_head = head;
}
if (zmq_msg_type (msg_) == ZMQ_DELIMITER) {
// Detach the pipe from the mux and send termination request to
// the pipe writer.
mux->detach_pipe (this);
mux = NULL;
send_terminate (peer);
return false;
}
return true;
}
void zmq::pipe_reader_t::terminate ()
{
// Detach the pipe from the mux and send termination request to
// the pipe writer.
if (mux) {
mux->detach_pipe (this);
mux = NULL;
}
send_terminate (peer);
}
void zmq::pipe_reader_t::process_terminate_ack ()
{
// Ask dispatcher to deallocate the pipe.
destroy_pipe (pipe);
}
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