/usr/include/gnuradio/msg_queue.h is in gnuradio-dev 3.7.9.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | /* -*- c++ -*- */
/*
* Copyright 2005,2009 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.
*/
#ifndef INCLUDED_GR_MSG_QUEUE_H
#define INCLUDED_GR_MSG_QUEUE_H
#include <gnuradio/api.h>
#include <gnuradio/msg_handler.h>
#include <gnuradio/thread/thread.h>
namespace gr {
/*!
* \brief thread-safe message queue
* \ingroup misc
*/
class GR_RUNTIME_API msg_queue : public msg_handler
{
gr::thread::mutex d_mutex;
gr::thread::condition_variable d_not_empty;
gr::thread::condition_variable d_not_full;
message::sptr d_head;
message::sptr d_tail;
unsigned int d_count; // # of messages in queue.
unsigned int d_limit; // max # of messages in queue. 0 -> unbounded
public:
typedef boost::shared_ptr<msg_queue> sptr;
static sptr make(unsigned int limit=0);
msg_queue(unsigned int limit);
~msg_queue();
//! Generic msg_handler method: insert the message.
void handle(message::sptr msg) { insert_tail (msg); }
/*!
* \brief Insert message at tail of queue.
* \param msg message
*
* Block if queue if full.
*/
void insert_tail(message::sptr msg);
/*!
* \brief Delete message from head of queue and return it.
* Block if no message is available.
*/
message::sptr delete_head();
/*!
* \brief If there's a message in the q, delete it and return it.
* If no message is available, return 0.
*/
message::sptr delete_head_nowait();
//! Delete all messages from the queue
void flush();
//! is the queue empty?
bool empty_p() const { return d_count == 0; }
//! is the queue full?
bool full_p() const { return d_limit != 0 && d_count >= d_limit; }
//! return number of messages in queue
unsigned int count() const { return d_count; }
//! return limit on number of message in queue. 0 -> unbounded
unsigned int limit() const { return d_limit; }
};
} /* namespace gr */
#endif /* INCLUDED_GR_MSG_QUEUE_H */
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