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
|
/* -*- c++ -*- */
/*
* Copyright 2005,2013 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_SELECT_HANDLER_H
#define INCLUDED_GR_SELECT_HANDLER_H
#include <gnuradio/api.h>
#include <boost/shared_ptr.hpp>
namespace gr {
class select_handler;
typedef boost::shared_ptr<select_handler> select_handler_sptr;
/*!
* \brief Abstract handler for select based notification.
* \ingroup base
*
* \sa gr::dispatcher
*/
class GR_RUNTIME_API select_handler
{
int d_fd;
protected:
select_handler(int file_descriptor);
public:
virtual ~select_handler();
int fd() const { return d_fd; }
int file_descriptor() const { return d_fd; }
/*!
* \brief Called when file_descriptor is readable.
*
* Called when the dispatcher detects that file_descriptor can be
* read without blocking.
*/
virtual void handle_read() = 0;
/*!
* \brief Called when file_descriptor is writable.
*
* Called when dispatcher detects that file descriptor can be
* written without blocking.
*/
virtual void handle_write() = 0;
/*!
* Called each time around the dispatcher loop to determine
* whether this handler's file descriptor should be added to the
* list on which read events can occur. The default method
* returns true, indicating that by default, all handlers are
* interested in read events.
*/
virtual bool readable() { return true; }
/*!
* Called each time around the dispatcher loop to determine
* whether this handler's file descriptor should be added to the
* list on which write events can occur. The default method
* returns true, indicating that by default, all handlers are
* interested in write events.
*/
virtual bool writable() { return true; }
};
} /* namespace gr */
#endif /* INCLUDED_GR_SELECT_HANDLER_H */
|
