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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #ifndef CEPH_LIBRBD_CONFIG_WATCHER_H | |
5 | #define CEPH_LIBRBD_CONFIG_WATCHER_H | |
6 | ||
7 | #include <set> | |
8 | #include <string> | |
9 | ||
10 | struct Context; | |
11 | ||
12 | namespace librbd { | |
13 | ||
14 | struct ImageCtx; | |
15 | ||
16 | template <typename ImageCtxT> | |
17 | class ConfigWatcher { | |
18 | public: | |
19 | static ConfigWatcher* create(ImageCtxT& image_ctx) { | |
20 | return new ConfigWatcher(image_ctx); | |
21 | } | |
22 | ||
23 | ConfigWatcher(ImageCtxT& image_ctx); | |
24 | ~ConfigWatcher(); | |
25 | ||
26 | ConfigWatcher(const ConfigWatcher&) = delete; | |
27 | ConfigWatcher& operator=(const ConfigWatcher&) = delete; | |
28 | ||
29 | void init(); | |
30 | void shut_down(); | |
31 | ||
32 | private: | |
33 | struct Observer; | |
34 | ||
35 | ImageCtxT& m_image_ctx; | |
36 | ||
37 | Observer* m_observer = nullptr; | |
38 | ||
39 | void handle_global_config_change(std::set<std::string> changed); | |
40 | ||
41 | }; | |
42 | ||
43 | } // namespace librbd | |
44 | ||
45 | extern template class librbd::ConfigWatcher<librbd::ImageCtx>; | |
46 | ||
47 | #endif // CEPH_LIBRBD_CONFIG_WATCHER_H |