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/* -*- c++ -*- */
/*
* Copyright 2005,2009,2010,2011 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.
*/
class gr_msg_queue;
typedef boost::shared_ptr<gr_msg_queue> gr_msg_queue_sptr;
%template(gr_msg_queue_sptr) boost::shared_ptr<gr_msg_queue>;
%rename(msg_queue) gr_make_msg_queue;
gr_msg_queue_sptr gr_make_msg_queue(unsigned limit=0);
/*!
* \brief thread-safe message queue
*/
%ignore gr_msg_queue;
class gr_msg_queue : public gr_msg_handler {
public:
gr_msg_queue(unsigned int limit);
~gr_msg_queue();
//! Generic msg_handler method: insert the message.
//void handle(gr_message_sptr msg) { insert_tail (msg); }
/*!
* \brief Insert message at tail of queue.
* \param msg message
*
* Block if queue if full.
*/
//void insert_tail(gr_message_sptr msg);
/*!
* \brief Delete message from head of queue and return it.
* Block if no message is available.
*/
//gr_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.
*/
gr_message_sptr delete_head_nowait();
//! is the queue empty?
bool empty_p() const;
//! is the queue full?
bool full_p() const;
//! return number of messages in queue
unsigned int count() const;
//! Delete all messages from the queue
void flush();
};
/*
* The following kludge-o-rama releases the Python global interpreter
* lock around these potentially blocking calls. We don't want
* libgnuradio-core to be dependent on Python, thus we create these
* functions that serve as replacements for the normal C++ delete_head
* and insert_tail methods. The %pythoncode smashes these new C++
* functions into the gr.msg_queue wrapper class, so that everything
* appears normal. (An evil laugh is heard in the distance...)
*/
#ifdef SWIGPYTHON
%inline %{
gr_message_sptr gr_py_msg_queue__delete_head(gr_msg_queue_sptr q) {
gr_message_sptr msg;
GR_PYTHON_BLOCKING_CODE(
msg = q->delete_head();
)
return msg;
}
void gr_py_msg_queue__insert_tail(gr_msg_queue_sptr q, gr_message_sptr msg) {
GR_PYTHON_BLOCKING_CODE(
q->insert_tail(msg);
)
}
%}
// smash in new python delete_head and insert_tail methods...
%pythoncode %{
gr_msg_queue_sptr.delete_head = gr_py_msg_queue__delete_head
gr_msg_queue_sptr.insert_tail = gr_py_msg_queue__insert_tail
gr_msg_queue_sptr.handle = gr_py_msg_queue__insert_tail
%}
#endif // SWIGPYTHON
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