3 * Copyright 2005 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <gr_message_sink.h>
28 #include <gr_io_signature.h>
31 #include <sys/types.h>
37 // public constructor that returns a shared_ptr
40 gr_make_message_sink (size_t itemsize, gr_msg_queue_sptr msgq, bool dont_block)
42 return gr_message_sink_sptr(new gr_message_sink(itemsize, msgq, dont_block));
45 gr_message_sink::gr_message_sink (size_t itemsize, gr_msg_queue_sptr msgq, bool dont_block)
46 : gr_sync_block("message_sink",
47 gr_make_io_signature(1, 1, itemsize),
48 gr_make_io_signature(0, 0, 0)),
49 d_itemsize(itemsize), d_msgq(msgq), d_dont_block(dont_block)
53 gr_message_sink::~gr_message_sink()
58 gr_message_sink::work(int noutput_items,
59 gr_vector_const_void_star &input_items,
60 gr_vector_void_star &output_items)
62 const char *in = (const char *) input_items[0];
64 // if we'd block, drop the data on the floor and say everything is OK
65 if (d_dont_block && d_msgq->full_p())
68 // build a message to hold whatever we've got
69 gr_message_sptr msg = gr_make_message(0, // msg type
70 d_itemsize, // arg1 for other end
71 noutput_items, // arg2 for other end (redundant)
72 noutput_items * d_itemsize); // len of msg
73 memcpy(msg->msg(), in, noutput_items * d_itemsize);
75 d_msgq->handle(msg); // send it