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/* -*- c++ -*- */
/*
* Copyright 2013 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 <gnuradio/io_signature.h>
#include "req_source_impl.h"
namespace gr {
namespace zeromq {
req_source::sptr
req_source::make(size_t itemsize, size_t vlen, char *address, int timeout)
{
return gnuradio::get_initial_sptr
(new req_source_impl(itemsize, vlen, address, timeout));
}
req_source_impl::req_source_impl(size_t itemsize, size_t vlen, char *address, int timeout)
: gr::sync_block("req_source",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(1, 1, itemsize * vlen)),
d_itemsize(itemsize), d_vlen(vlen), d_timeout(timeout)
{
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_REQ);
int time = 0;
d_socket->setsockopt(ZMQ_LINGER, &time, sizeof(time));
d_socket->connect (address);
}
req_source_impl::~req_source_impl()
{
d_socket->close();
d_context->close();
delete d_socket;
delete d_context;
}
int
req_source_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
char *out = (char*)output_items[0];
zmq::pollitem_t itemsout[] = { { *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?
zmq::message_t request(sizeof(int));
memcpy ((void *) request.data (), &noutput_items, sizeof(int));
d_socket->send(request);
}
zmq::pollitem_t itemsin[] = { { *d_socket, 0, ZMQ_POLLIN, 0 } };
zmq::poll (&itemsin[0], 1, d_timeout);
// If we got a reply, process
if (itemsin[0].revents & ZMQ_POLLIN) {
// Receive data
zmq::message_t reply;
d_socket->recv(&reply);
// Copy to ouput buffer and return
memcpy(out, (void *)reply.data(), reply.size());
return reply.size()/(d_itemsize*d_vlen);
}
return 0;
}
} /* namespace zeromq */
} /* namespace gr */
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