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/* -*- c++ -*- */
/*
* Copyright 2016 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 "base_impl.h"
#include "tag_headers.h"
namespace gr {
namespace zeromq {
base_impl::base_impl(int type, size_t itemsize, size_t vlen, int timeout, bool pass_tags)
: d_vsize(itemsize * vlen), d_timeout(timeout), d_pass_tags(pass_tags)
{
/* "Fix" timeout value (ms for new API, us for old API) */
int major, minor, patch;
zmq::version (&major, &minor, &patch);
if (major < 3) {
d_timeout *= 1000;
}
/* Create context & socket */
d_context = new zmq::context_t(1);
d_socket = new zmq::socket_t(*d_context, type);
}
base_impl::~base_impl()
{
d_socket->close();
delete d_socket;
delete d_context;
}
base_sink_impl::base_sink_impl(int type, size_t itemsize, size_t vlen, char *address, int timeout, bool pass_tags, int hwm)
: base_impl(type, itemsize, vlen, timeout, pass_tags)
{
/* Set high watermark */
if (hwm >= 0) {
#ifdef ZMQ_SNDHWM
d_socket->setsockopt(ZMQ_SNDHWM, &hwm, sizeof(hwm));
#else // major < 3
uint64_t tmp = hwm;
d_socket->setsockopt(ZMQ_HWM, &tmp, sizeof(tmp));
#endif
}
/* Bind */
d_socket->bind(address);
}
int
base_sink_impl::send_message(const void *in_buf, const int in_nitems, const uint64_t in_offset)
{
/* Meta-data header */
std::string header("");
if(d_pass_tags){
std::vector<gr::tag_t> tags;
get_tags_in_range(tags, 0, in_offset, in_offset + in_nitems);
header = gen_tag_header(in_offset, tags);
}
/* Create message */
size_t payload_len = in_nitems * d_vsize;
size_t msg_len = d_pass_tags ? payload_len + header.length() : payload_len;
zmq::message_t msg(msg_len);
if(d_pass_tags){
memcpy(msg.data(), header.c_str(), header.length());
memcpy((uint8_t*)msg.data() + header.length(), in_buf, payload_len);
} else {
memcpy(msg.data(), in_buf, payload_len);
}
/* Send */
d_socket->send(msg);
/* Report back */
return in_nitems;
}
base_source_impl::base_source_impl(int type, size_t itemsize, size_t vlen, char *address, int timeout, bool pass_tags, int hwm)
: base_impl(type, itemsize, vlen, timeout, pass_tags),
d_consumed_bytes(0), d_consumed_items(0)
{
/* Set high watermark */
if (hwm >= 0) {
#ifdef ZMQ_RCVHWM
d_socket->setsockopt(ZMQ_RCVHWM, &hwm, sizeof(hwm));
#else // major < 3
uint64_t tmp = hwm;
d_socket->setsockopt(ZMQ_HWM, &tmp, sizeof(tmp));
#endif
}
/* Connect */
d_socket->connect(address);
}
bool
base_source_impl::has_pending()
{
return d_msg.size() > d_consumed_bytes;
}
int
base_source_impl::flush_pending(void *out_buf, const int out_nitems, const uint64_t out_offset)
{
/* How much to copy in this call */
int to_copy_items = std::min(out_nitems, (int)((d_msg.size() - d_consumed_bytes) / d_vsize));
int to_copy_bytes = d_vsize * to_copy_items;
/* Copy actual data */
memcpy(out_buf, (uint8_t*)d_msg.data() + d_consumed_bytes, to_copy_bytes);
/* Add tags matching this segment of samples */
for (unsigned int i=0; i<d_tags.size(); i++)
{
if ((d_tags[i].offset >= (uint64_t)d_consumed_items) &&
(d_tags[i].offset < (uint64_t)d_consumed_items + to_copy_items))
{
gr::tag_t nt = d_tags[i];
nt.offset += out_offset - d_consumed_items;
add_item_tag(0, nt);
}
}
/* Update pointer */
d_consumed_items += to_copy_items;
d_consumed_bytes += to_copy_bytes;
return to_copy_items;
}
bool
base_source_impl::load_message(bool wait)
{
/* Poll for input */
zmq::pollitem_t items[] = { { static_cast<void *>(*d_socket), 0, ZMQ_POLLIN, 0 } };
zmq::poll(&items[0], 1, wait ? d_timeout : 0);
if (!(items[0].revents & ZMQ_POLLIN))
return false;
/* Is this the start or continuation of a multi-part message? */
int64_t more = 0;
size_t more_len = sizeof(more);
d_socket->getsockopt(ZMQ_RCVMORE, &more, &more_len);
/* Reset */
d_msg.rebuild();
d_tags.clear();
d_consumed_items = 0;
d_consumed_bytes = 0;
/* Get the message */
d_socket->recv(&d_msg);
/* Parse header from the first (or only) message of a multi-part message */
if (d_pass_tags && !more)
{
uint64_t rcv_offset;
/* Parse header */
d_consumed_bytes = parse_tag_header(d_msg, rcv_offset, d_tags);
/* Fixup the tags offset to be relative to the start of this message */
for (unsigned int i=0; i<d_tags.size(); i++) {
d_tags[i].offset -= rcv_offset;
}
}
/* Each message must contain an integer mutliple of data vectors */
if ((d_msg.size() - d_consumed_bytes) % d_vsize != 0)
{
throw std::runtime_error(
boost::str(boost::format("Incompatible vector sizes: "
"need a multiple of %1% bytes per message") % d_vsize));
}
/* We got one ! */
return true;
}
} /* namespace zeromq */
} /* namespace gr */
// vim: ts=2 sw=2 expandtab
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