Mir
observer_registrar.h
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1 /*
2  * Copyright © 2016 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU 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 General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
17  */
18 
19 #ifndef MIR_OBSERVER_REGISTRAR_H_
20 #define MIR_OBSERVER_REGISTRAR_H_
21 
22 #include <memory>
23 
24 namespace mir
25 {
26 class Executor;
27 
33 template<class Observer>
35 {
36 public:
45  virtual void register_interest(std::weak_ptr<Observer> const& observer) = 0;
46 
68  virtual void register_interest(
69  std::weak_ptr<Observer> const& observer,
70  Executor& executor) = 0;
71 
81  virtual void unregister_interest(Observer const& observer) = 0;
82 
83 protected:
84  ObserverRegistrar() = default;
85  virtual ~ObserverRegistrar() = default;
86  ObserverRegistrar(ObserverRegistrar const&) = delete;
88 };
89 
90 }
91 
92 #endif //MIR_OBSERVER_REGISTRAR_H_
virtual void unregister_interest(Observer const &observer)=0
Remove an observer from the set notified of all observations.
Definition: as_render_target.h:27
virtual void register_interest(std::weak_ptr< Observer > const &observer)=0
Add an observer to the set notified of all observations.
virtual ~ObserverRegistrar()=default
ObserverRegistrar & operator=(ObserverRegistrar const &)=delete
Register observers for a subsystem.
Definition: observer_registrar.h:34
An executor abstraction mostly compatible with C++ proposal N4414.
Definition: executor.h:38

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Generated on Sat Dec 3 12:48:59 UTC 2016