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
97
98
99
100
101
102
103
104
105
106
107
|
/*
Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/lib/update_checker.h
* @brief UpdateChecker class.
*/
#include "signaller.h"
#include <curl/curl.h>
#include <boost/signals2.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition.hpp>
#include <boost/thread.hpp>
struct update_checker_test;
/** Class to check for the existence of an update for DCP-o-matic on a remote server */
class UpdateChecker : public Signaller
{
public:
~UpdateChecker ();
UpdateChecker (UpdateChecker const &);
UpdateChecker& operator= (UpdateChecker const &);
void run ();
enum class State {
YES, ///< there is an update
FAILED, ///< the check failed, so we don't know
NO, ///< there is no update
NOT_RUN ///< the check has not been run (yet)
};
/** @return state of the checker */
State state () {
boost::mutex::scoped_lock lm (_data_mutex);
return _state;
}
/** @return new stable version, if there is one */
boost::optional<std::string> stable () {
boost::mutex::scoped_lock lm (_data_mutex);
return _stable;
}
/** @return new test version, if there is one */
boost::optional<std::string> test () {
boost::mutex::scoped_lock lm (_data_mutex);
return _test;
}
size_t write_callback (void *, size_t, size_t);
boost::signals2::signal<void (void)> StateChanged;
static UpdateChecker* instance ();
private:
friend struct update_checker_test;
static UpdateChecker* _instance;
static bool version_less_than (std::string const & a, std::string const & b);
UpdateChecker ();
void start ();
void set_state (State);
void thread ();
std::vector<char> _buffer;
int _offset = 0;
CURL* _curl = nullptr;
/** mutex to protect _state, _stable, _test and _emits */
mutable boost::mutex _data_mutex;
State _state;
boost::optional<std::string> _stable;
boost::optional<std::string> _test;
boost::thread _thread;
boost::mutex _process_mutex;
boost::condition _condition;
int _to_do = 0;
bool _terminate = false;
};
|
