1 /* -*- c++ -*- */
2 /*
3 * Copyright 2012-2013 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
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)
10 * any later version.
11 *
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.
16 *
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.
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include "message_strobe_impl.h"
28 #include <gnuradio/io_signature.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <string.h>
32 #include <sys/stat.h>
33 #include <sys/types.h>
34 #include <cstdio>
35 #include <iostream>
36 #include <stdexcept>
37
38 namespace gr {
39 namespace blocks {
40
make(pmt::pmt_t msg,long period_ms)41 message_strobe::sptr message_strobe::make(pmt::pmt_t msg, long period_ms)
42 {
43 return gnuradio::get_initial_sptr(new message_strobe_impl(msg, period_ms));
44 }
45
message_strobe_impl(pmt::pmt_t msg,long period_ms)46 message_strobe_impl::message_strobe_impl(pmt::pmt_t msg, long period_ms)
47 : block("message_strobe", io_signature::make(0, 0, 0), io_signature::make(0, 0, 0)),
48 d_finished(false),
49 d_period_ms(period_ms),
50 d_msg(msg),
51 d_port(pmt::mp("strobe"))
52 {
53 message_port_register_out(d_port);
54
55 message_port_register_in(pmt::mp("set_msg"));
56 set_msg_handler(pmt::mp("set_msg"), [this](pmt::pmt_t msg) { this->set_msg(msg); });
57 }
58
~message_strobe_impl()59 message_strobe_impl::~message_strobe_impl() {}
60
start()61 bool message_strobe_impl::start()
62 {
63 // NOTE: d_finished should be something explicitly thread safe. But since
64 // nothing breaks on concurrent access, I'll just leave it as bool.
65 d_finished = false;
66 d_thread = boost::shared_ptr<gr::thread::thread>(
67 new gr::thread::thread(boost::bind(&message_strobe_impl::run, this)));
68
69 return block::start();
70 }
71
stop()72 bool message_strobe_impl::stop()
73 {
74 // Shut down the thread
75 d_finished = true;
76 d_thread->interrupt();
77 d_thread->join();
78
79 return block::stop();
80 }
81
run()82 void message_strobe_impl::run()
83 {
84 while (!d_finished) {
85 boost::this_thread::sleep(
86 boost::posix_time::milliseconds(static_cast<long>(d_period_ms)));
87 if (d_finished) {
88 return;
89 }
90
91 message_port_pub(d_port, d_msg);
92 }
93 }
94
95 } /* namespace blocks */
96 } /* namespace gr */
97