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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MOJO_EDK_SYSTEM_WATCHER_SET_H_ | |
6 #define MOJO_EDK_SYSTEM_WATCHER_SET_H_ | |
7 | |
8 #include <unordered_map> | |
9 | |
10 #include "base/callback.h" | |
Anand Mistry (off Chromium)
2016/03/02 01:50:36
#include "base/macros.h"
Ken Rockot(use gerrit already)
2016/03/02 02:09:39
done
| |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/synchronization/lock.h" | |
Anand Mistry (off Chromium)
2016/03/02 01:50:36
Unused
Ken Rockot(use gerrit already)
2016/03/02 02:09:39
removed
| |
13 #include "mojo/edk/system/handle_signals_state.h" | |
14 #include "mojo/edk/system/watcher.h" | |
15 #include "mojo/public/c/system/types.h" | |
16 | |
17 namespace mojo { | |
18 namespace edk { | |
19 | |
20 // A WatcherSet maintains a set of Watchers attached to a single handle and | |
21 // keyed on an arbitrary user context. | |
22 class WatcherSet { | |
23 public: | |
24 WatcherSet(); | |
25 ~WatcherSet(); | |
26 | |
27 // Notifies all Watchers of a state change. | |
28 void NotifyForStateChange(const HandleSignalsState& state); | |
29 | |
30 // Notifies all Watchers that their watched handle has been closed. | |
31 void NotifyClosed(); | |
32 | |
33 // Adds a new watcher to watch for signals in |signals| to be satisfied or | |
34 // unsatisfiable. |current_state| is the current signals state of the | |
35 // handle being watched. | |
36 MojoResult Add(MojoHandleSignals signals, | |
37 const Watcher::WatchCallback& callback, | |
38 uintptr_t context, | |
39 const HandleSignalsState& current_state); | |
40 | |
41 MojoResult Remove(uintptr_t context); | |
Anand Mistry (off Chromium)
2016/03/02 01:50:36
For consistency, add a comment.
Ken Rockot(use gerrit already)
2016/03/02 02:09:39
done
| |
42 | |
43 private: | |
44 // A map of watchers keyed on context value. | |
45 std::unordered_map<uintptr_t, scoped_refptr<Watcher>> watchers_; | |
46 | |
47 DISALLOW_COPY_AND_ASSIGN(WatcherSet); | |
48 }; | |
49 | |
50 } // namespace edk | |
51 } // namespace mojo | |
52 | |
53 #endif // MOJO_EDK_SYSTEM_WATCHER_SET_H_ | |
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