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Side by Side Diff: third_party/mojo/src/mojo/edk/system/wait_set_dispatcher.h

Issue 1676913002: [mojo] Delete third_party/mojo (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: let's try that again Created 4 years, 10 months ago
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1 // Copyright 2015 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 THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_
6 #define THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_
7
8 #include <deque>
9 #include <map>
10 #include <utility>
11
12 #include "base/memory/scoped_ptr.h"
13 #include "mojo/public/cpp/system/macros.h"
14 #include "third_party/mojo/src/mojo/edk/system/awakable_list.h"
15 #include "third_party/mojo/src/mojo/edk/system/dispatcher.h"
16 #include "third_party/mojo/src/mojo/edk/system/mutex.h"
17 #include "third_party/mojo/src/mojo/edk/system/system_impl_export.h"
18
19 namespace mojo {
20 namespace system {
21
22 class MOJO_SYSTEM_IMPL_EXPORT WaitSetDispatcher : public Dispatcher {
23 public:
24 WaitSetDispatcher();
25 ~WaitSetDispatcher() override;
26
27 // |Dispatcher| public methods:
28 Type GetType() const override;
29
30 private:
31 // Internal implementation of Awakable.
32 class Waiter;
33
34 struct WaitState {
35 scoped_refptr<Dispatcher> dispatcher;
36 MojoHandleSignals signals;
37 uintptr_t context;
38 };
39
40 // |Dispatcher| protected methods:
41 void CloseImplNoLock() override;
42 void CancelAllAwakablesNoLock() override;
43 MojoResult AddAwakableImplNoLock(Awakable* awakable,
44 MojoHandleSignals signals,
45 uintptr_t context,
46 HandleSignalsState* signals_state) override;
47 void RemoveAwakableImplNoLock(Awakable* awakable,
48 HandleSignalsState* signals_state) override;
49 MojoResult AddWaitingDispatcherImplNoLock(
50 const scoped_refptr<Dispatcher>& dispatcher,
51 MojoHandleSignals signals,
52 uintptr_t context) override;
53 MojoResult RemoveWaitingDispatcherImplNoLock(
54 const scoped_refptr<Dispatcher>& dispatcher) override;
55 MojoResult GetReadyDispatchersImplNoLock(
56 UserPointer<uint32_t> count,
57 DispatcherVector* dispatchers,
58 UserPointer<MojoResult> results,
59 UserPointer<uintptr_t> contexts) override;
60 HandleSignalsState GetHandleSignalsStateImplNoLock() const override;
61 scoped_refptr<Dispatcher> CreateEquivalentDispatcherAndCloseImplNoLock()
62 override;
63
64 // Signal that the dispatcher indexed by |context| has been woken up with
65 // |result| and is now ready.
66 void WakeDispatcher(MojoResult result, uintptr_t context);
67
68 // Map of dispatchers being waited on. Key is a Dispatcher* casted to a
69 // uintptr_t, and should be treated as an opaque value and not casted back.
70 std::map<uintptr_t, WaitState> waiting_dispatchers_ MOJO_GUARDED_BY(mutex());
71
72 // Separate mutex that can be locked without locking |mutex()|.
73 mutable Mutex awoken_mutex_ MOJO_ACQUIRED_AFTER(mutex());
74 // List of dispatchers that have been woken up. Any dispatcher in this queue
75 // will NOT currently be waited on.
76 std::deque<std::pair<uintptr_t, MojoResult>> awoken_queue_
77 MOJO_GUARDED_BY(awoken_mutex_);
78 // List of dispatchers that have been woken up and retrieved on the last call
79 // to |GetReadyDispatchers()|.
80 std::deque<uintptr_t> processed_dispatchers_ MOJO_GUARDED_BY(awoken_mutex_);
81
82 // Separate mutex that can be locked without locking |mutex()|.
83 Mutex awakable_mutex_ MOJO_ACQUIRED_AFTER(mutex());
84 // List of dispatchers being waited on.
85 AwakableList awakable_list_ MOJO_GUARDED_BY(awakable_mutex_);
86
87 // Waiter used to wait on dispatchers.
88 scoped_ptr<Waiter> waiter_;
89 };
90
91 } // namespace system
92 } // namespace mojo
93
94 #endif // THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_
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