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Side by Side Diff: mojo/edk/system/awakable_list.h

Issue 2744943002: Mojo: Move waiting APIs to public library (Closed)
Patch Set: . Created 3 years, 9 months ago
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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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