blob: 166c3c75411a88c7a14c81233bb4f14bee570e9c (
plain)
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
96
|
/* -*- c++ -*- */
/*
* Copyright 2005,2009-2011,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
namespace gr {
/*!
* \brief thread-safe message queue
*/
class msg_queue : public gr::msg_handler
{
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(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-runtime 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 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 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...
%template(msg_queue_sptr) boost::shared_ptr<gr::msg_queue>;
%pythoncode %{
msg_queue_sptr.delete_head = py_msg_queue__delete_head
msg_queue_sptr.insert_tail = py_msg_queue__insert_tail
msg_queue_sptr.handle = py_msg_queue__insert_tail
msg_queue = msg_queue.make
%}
#endif // SWIGPYTHON
|
