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1 // Copyright 2013 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_AWAKABLE_LIST_H_ | |
6 #define MOJO_EDK_SYSTEM_AWAKABLE_LIST_H_ | |
7 | |
8 #include <stddef.h> | |
9 #include <stdint.h> | |
10 | |
11 #include <vector> | |
12 | |
13 #include "base/macros.h" | |
14 #include "mojo/edk/system/system_impl_export.h" | |
15 #include "mojo/public/c/system/types.h" | |
16 #include "mojo/public/cpp/system/handle_signals_state.h" | |
17 | |
18 namespace mojo { | |
19 namespace edk { | |
20 | |
21 class Awakable; | |
22 | |
23 // |AwakableList| tracks all the |Waiter|s that are waiting on a given | |
24 // handle/|Dispatcher|. There should be a |AwakableList| for each handle that | |
25 // can be waited on (in any way). In the simple case, the |AwakableList| is | |
26 // owned by the |Dispatcher|, whereas in more complex cases it is owned by the | |
27 // secondary object (see simple_dispatcher.* and the explanatory comment in | |
28 // core.cc). This class is thread-unsafe (all concurrent access must be | |
29 // protected by some lock). | |
30 class MOJO_SYSTEM_IMPL_EXPORT AwakableList { | |
31 public: | |
32 AwakableList(); | |
33 ~AwakableList(); | |
34 | |
35 void AwakeForStateChange(const HandleSignalsState& state); | |
36 void CancelAll(); | |
37 void Add(Awakable* awakable, MojoHandleSignals signals, uintptr_t context); | |
38 void Remove(Awakable* awakable); | |
39 | |
40 private: | |
41 struct AwakeInfo { | |
42 AwakeInfo(Awakable* awakable, MojoHandleSignals signals, uintptr_t context) | |
43 : awakable(awakable), signals(signals), context(context) {} | |
44 | |
45 Awakable* awakable; | |
46 MojoHandleSignals signals; | |
47 uintptr_t context; | |
48 }; | |
49 using AwakeInfoList = std::vector<AwakeInfo>; | |
50 | |
51 AwakeInfoList awakables_; | |
52 | |
53 DISALLOW_COPY_AND_ASSIGN(AwakableList); | |
54 }; | |
55 | |
56 } // namespace edk | |
57 } // namespace mojo | |
58 | |
59 #endif // MOJO_EDK_SYSTEM_AWAKABLE_LIST_H_ | |
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