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/* -*- c++ -*- */
/*
* Copyright 2013,2014,2019 Free Software Foundation, Inc.
*
* This file is part of GNU Radio.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "req_msg_source_impl.h"
#include "tag_headers.h"
#include <gnuradio/io_signature.h>
#include <boost/bind.hpp>
#include <boost/thread/thread.hpp>
#include <chrono>
#include <memory>
#include <thread>
namespace gr {
namespace zeromq {
req_msg_source::sptr req_msg_source::make(char* address, int timeout, bool bind)
{
return gnuradio::make_block_sptr<req_msg_source_impl>(address, timeout, bind);
}
req_msg_source_impl::req_msg_source_impl(char* address, int timeout, bool bind)
: gr::block("req_msg_source",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_timeout(timeout),
d_context(1),
d_socket(d_context, ZMQ_REQ),
d_port(pmt::mp("out"))
{
int major, minor, patch;
zmq::version(&major, &minor, &patch);
if (major < 3) {
d_timeout = timeout * 1000;
}
int time = 0;
d_socket.setsockopt(ZMQ_LINGER, &time, sizeof(time));
if (bind) {
d_socket.bind(address);
} else {
d_socket.connect(address);
}
message_port_register_out(d_port);
}
req_msg_source_impl::~req_msg_source_impl() {}
bool req_msg_source_impl::start()
{
d_finished = false;
d_thread = std::make_unique<boost::thread>(
boost::bind(&req_msg_source_impl::readloop, this));
return true;
}
bool req_msg_source_impl::stop()
{
d_finished = true;
d_thread->join();
return true;
}
void req_msg_source_impl::readloop()
{
using namespace std::chrono_literals;
while (!d_finished) {
// std::cout << "readloop\n";
zmq::pollitem_t itemsout[] = {
{ static_cast<void*>(d_socket), 0, ZMQ_POLLOUT, 0 }
};
zmq::poll(&itemsout[0], 1, d_timeout);
// If we got a reply, process
if (itemsout[0].revents & ZMQ_POLLOUT) {
// Request data, FIXME non portable?
int nmsg = 1;
zmq::message_t request(sizeof(int));
memcpy((void*)request.data(), &nmsg, sizeof(int));
#if USE_NEW_CPPZMQ_SEND_RECV
d_socket.send(request, zmq::send_flags::none);
#else
d_socket.send(request);
#endif
}
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
zmq::message_t msg;
#if USE_NEW_CPPZMQ_SEND_RECV
const bool ok = bool(d_socket.recv(msg));
#else
const bool ok = d_socket.recv(&msg);
#endif
if (!ok) {
// Should not happen, we've checked POLLIN.
GR_LOG_ERROR(d_logger, "Failed to receive message.");
std::this_thread::sleep_for(100ms);
continue;
}
std::string buf(static_cast<char*>(msg.data()), msg.size());
std::stringbuf sb(buf);
try {
pmt::pmt_t m = pmt::deserialize(sb);
message_port_pub(d_port, m);
} catch (pmt::exception& e) {
GR_LOG_ERROR(d_logger, std::string("Invalid PMT message: ") + e.what());
}
} else {
std::this_thread::sleep_for(100ms);
}
}
}
} /* namespace zeromq */
} /* namespace gr */
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