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/* -*- c++ -*- */
/*
* Copyright 2013,2014 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"
#include "tag_headers.h"
namespace gr {
namespace zeromq {
req_source::sptr
req_source::make(size_t itemsize, size_t vlen, char *address, int timeout, bool pass_tags, int hwm)
{
return gnuradio::get_initial_sptr
(new req_source_impl(itemsize, vlen, address, timeout, pass_tags, hwm));
}
req_source_impl::req_source_impl(size_t itemsize, size_t vlen, char *address, int timeout, bool pass_tags, int hwm)
: gr::sync_block("req_source",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(1, 1, itemsize * vlen)),
base_source_impl(ZMQ_REQ, itemsize, vlen, address, timeout, pass_tags, hwm),
d_req_pending(false)
{
/* All is delegated */
}
int
req_source_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
#if 0
#endif
uint8_t *out = (uint8_t *) output_items[0];
bool first = true;
int done = 0;
/* Process as much as we can */
while (1)
{
if (has_pending())
{
/* Flush anything pending */
done += flush_pending(out + (done * d_vsize), noutput_items - done, nitems_written(0) + done);
/* No more space ? */
if (done == noutput_items)
break;
}
else
{
/* Send request if needed */
if (!d_req_pending)
{
/* The REP/REQ pattern state machine guarantees we can send at this point */
uint32_t req_len = noutput_items - done;
zmq::message_t request(sizeof(uint32_t));
memcpy ((void *) request.data (), &req_len, sizeof(uint32_t));
d_socket->send(request);
d_req_pending = true;
}
/* Try to get the next message */
if (!load_message(first))
break; /* No message, we're done for now */
/* Got response */
d_req_pending = false;
/* Not the first anymore */
first = false;
}
}
return done;
return 0;
}
} /* namespace zeromq */
} /* namespace gr */
// vim: ts=2 sw=2 expandtab
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