Mir
atomic_callback.h
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1 /*
2  * Copyright © 2013 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU Lesser General Public License version 3,
6  * as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Ricardo Mendoza <ricardo.mendoza@canonical.com>
17  */
18 
19 #ifndef MIR_CLIENT_ATOMIC_CALLBACK_H_
20 #define MIR_CLIENT_ATOMIC_CALLBACK_H_
21 
22 #include <functional>
23 #include <mutex>
24 
25 namespace mir
26 {
27 namespace client
28 {
29 template<typename... Args>
31 {
32 public:
34  : callback{[](Args...){}}
35  {
36  }
37 
38  AtomicCallback(std::function<void(Args...)> const& fn)
39  : callback(fn)
40  {
41  }
42 
43  ~AtomicCallback() = default;
44 
45  void set_callback(std::function<void(Args...)> const& fn)
46  {
47  std::lock_guard<std::mutex> lk(guard);
48 
49  callback = fn;
50  }
51 
52  void operator()(Args&&... args) const
53  {
54  std::lock_guard<std::mutex> lk(guard);
55 
56  callback(std::forward<Args>(args)...);
57  }
58 
59 private:
60  std::mutex mutable guard;
61  std::function<void(Args...)> callback;
62 };
63 }
64 }
65 
66 #endif /* MIR_CLIENT_ATOMIC_CALLBACK_H_ */
All things Mir.
Definition: atomic_callback.h:25
void set_callback(std::function< void(Args...)> const &fn)
Definition: atomic_callback.h:45
void operator()(Args &&...args) const
Definition: atomic_callback.h:52
Definition: atomic_callback.h:30
AtomicCallback()
Definition: atomic_callback.h:33
AtomicCallback(std::function< void(Args...)> const &fn)
Definition: atomic_callback.h:38

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