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/* -*- c++ -*- */
/*
* Copyright 2013,2014,2019 Free Software Foundation, Inc.
*
* This file is part of GNU Radio.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "rep_msg_sink_impl.h"
#include "tag_headers.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace zeromq {
rep_msg_sink::sptr rep_msg_sink::make(char* address, int timeout)
{
return gnuradio::get_initial_sptr(new rep_msg_sink_impl(address, timeout));
}
rep_msg_sink_impl::rep_msg_sink_impl(char* address, int timeout)
: gr::block("rep_msg_sink",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_timeout(timeout),
d_port(pmt::mp("in"))
{
int major, minor, patch;
zmq::version(&major, &minor, &patch);
if (major < 3) {
d_timeout = timeout * 1000;
}
d_context = new zmq::context_t(1);
d_socket = new zmq::socket_t(*d_context, ZMQ_REP);
int time = 0;
d_socket->setsockopt(ZMQ_LINGER, &time, sizeof(time));
d_socket->bind(address);
message_port_register_in(d_port);
}
rep_msg_sink_impl::~rep_msg_sink_impl()
{
d_socket->close();
delete d_socket;
delete d_context;
}
bool rep_msg_sink_impl::start()
{
d_finished = false;
d_thread = new boost::thread(boost::bind(&rep_msg_sink_impl::readloop, this));
return true;
}
bool rep_msg_sink_impl::stop()
{
d_finished = true;
d_thread->join();
return true;
}
void rep_msg_sink_impl::readloop()
{
while (!d_finished) {
// while we have data, wait for query...
while (!empty_p(d_port)) {
// wait for query...
zmq::pollitem_t items[] = {
{ static_cast<void*>(*d_socket), 0, ZMQ_POLLIN, 0 }
};
zmq::poll(&items[0], 1, d_timeout);
// If we got a reply, process
if (items[0].revents & ZMQ_POLLIN) {
// receive data request
zmq::message_t request;
#if USE_NEW_CPPZMQ_SEND_RECV
d_socket->recv(request);
#else
d_socket->recv(&request);
#endif
int req_output_items = *(static_cast<int*>(request.data()));
if (req_output_items != 1)
throw std::runtime_error(
"Request was not 1 msg for rep/req request!!");
// create message copy and send
pmt::pmt_t msg = delete_head_nowait(d_port);
std::stringbuf sb("");
pmt::serialize(msg, sb);
std::string s = sb.str();
zmq::message_t zmsg(s.size());
memcpy(zmsg.data(), s.c_str(), s.size());
d_socket->send(zmsg);
} // if req
} // while !empty
} // while !d_finished
}
} /* namespace zeromq */
} /* namespace gr */
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