/* -*- c++ -*- */
/*
 * Copyright 2005,2010,2013 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * GNU Radio 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.
 *
 * GNU Radio 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 GNU Radio; 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 "message_sink_impl.h"
#include <gr_io_signature.h>
#include <cstdio>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdexcept>
#include <string.h>

namespace gr {
  namespace blocks {

    message_sink::sptr
    message_sink::make(size_t itemsize, gr_msg_queue_sptr msgq, bool dont_block)
    {
      return gnuradio::get_initial_sptr
        (new message_sink_impl(itemsize, msgq, dont_block));
    }

    message_sink_impl::message_sink_impl(size_t itemsize, gr_msg_queue_sptr msgq, bool dont_block)
      : gr_sync_block("message_sink",
                      gr_make_io_signature(1, 1, itemsize),
                      gr_make_io_signature(0, 0, 0)),
        d_itemsize(itemsize), d_msgq(msgq), d_dont_block(dont_block)
    {
    }

    message_sink_impl::~message_sink_impl()
    {
    }

    int
    message_sink_impl::work(int noutput_items,
                            gr_vector_const_void_star &input_items,
                            gr_vector_void_star &output_items)
    {
      const char *in = (const char*)input_items[0];

      // if we'd block, drop the data on the floor and say everything is OK
      if(d_dont_block && d_msgq->full_p())
        return noutput_items;

      // build a message to hold whatever we've got
      gr_message_sptr msg = gr_make_message(0, 		    // msg type
                                            d_itemsize,     // arg1 for other end
                                            noutput_items,  // arg2 for other end (redundant)
                                            noutput_items * d_itemsize); // len of msg
      memcpy(msg->msg(), in, noutput_items * d_itemsize);

      d_msgq->handle(msg);        // send it

      return noutput_items;
    }

  } /* namespace blocks */
} /* namespace gr */