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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MOJO_EDK_JS_WAITING_CALLBACK_H_ | 5 #ifndef MOJO_EDK_JS_WAITING_CALLBACK_H_ |
6 #define MOJO_EDK_JS_WAITING_CALLBACK_H_ | 6 #define MOJO_EDK_JS_WAITING_CALLBACK_H_ |
7 | 7 |
8 #include "base/macros.h" | 8 #include "base/macros.h" |
9 #include "base/memory/weak_ptr.h" | 9 #include "base/memory/weak_ptr.h" |
10 #include "gin/handle.h" | 10 #include "gin/handle.h" |
11 #include "gin/runner.h" | 11 #include "gin/runner.h" |
12 #include "gin/wrappable.h" | 12 #include "gin/wrappable.h" |
13 #include "mojo/edk/js/handle.h" | 13 #include "mojo/edk/js/handle.h" |
14 #include "mojo/edk/js/handle_close_observer.h" | |
15 #include "mojo/message_pump/handle_watcher.h" | |
16 #include "mojo/public/cpp/system/core.h" | 14 #include "mojo/public/cpp/system/core.h" |
| 15 #include "mojo/public/cpp/system/watcher.h" |
17 | 16 |
18 namespace mojo { | 17 namespace mojo { |
19 namespace edk { | 18 namespace edk { |
20 namespace js { | 19 namespace js { |
21 | 20 |
22 class WaitingCallback : public gin::Wrappable<WaitingCallback>, | 21 class WaitingCallback : public gin::Wrappable<WaitingCallback> { |
23 public HandleCloseObserver { | |
24 public: | 22 public: |
25 static gin::WrapperInfo kWrapperInfo; | 23 static gin::WrapperInfo kWrapperInfo; |
26 | 24 |
27 // Creates a new WaitingCallback. | 25 // Creates a new WaitingCallback. |
| 26 // |
| 27 // If |one_shot| is true, the callback will only ever be called at most once. |
| 28 // If false, the callback may be called any number of times until the |
| 29 // WaitingCallback is explicitly cancelled. |
28 static gin::Handle<WaitingCallback> Create( | 30 static gin::Handle<WaitingCallback> Create( |
29 v8::Isolate* isolate, | 31 v8::Isolate* isolate, |
30 v8::Handle<v8::Function> callback, | 32 v8::Handle<v8::Function> callback, |
31 gin::Handle<HandleWrapper> handle_wrapper, | 33 gin::Handle<HandleWrapper> handle_wrapper, |
32 MojoHandleSignals signals); | 34 MojoHandleSignals signals, |
| 35 bool one_shot); |
33 | 36 |
34 // Cancels the callback. Does nothing if a callback is not pending. This is | 37 // Cancels the callback. Does nothing if a callback is not pending. This is |
35 // implicitly invoked from the destructor but can be explicitly invoked as | 38 // implicitly invoked from the destructor but can be explicitly invoked as |
36 // necessary. | 39 // necessary. |
37 void Cancel(); | 40 void Cancel(); |
38 | 41 |
39 private: | 42 private: |
40 WaitingCallback(v8::Isolate* isolate, | 43 WaitingCallback(v8::Isolate* isolate, |
41 v8::Handle<v8::Function> callback, | 44 v8::Handle<v8::Function> callback, |
42 gin::Handle<HandleWrapper> handle_wrapper); | 45 bool one_shot); |
43 ~WaitingCallback() override; | 46 ~WaitingCallback() override; |
44 | 47 |
45 // Callback from common::HandleWatcher. | 48 // Callback from the Watcher. |
46 void OnHandleReady(MojoResult result); | 49 void OnHandleReady(MojoResult result); |
47 | 50 |
48 // Invoked by the HandleWrapper if the handle is closed while this wait is | 51 // Indicates whether this is a one-shot callback or not. If so, it uses the |
49 // still in progress. | 52 // deprecated HandleWatcher to wait for signals; otherwise it uses the new |
50 void OnWillCloseHandle() override; | 53 // system Watcher API. |
51 | 54 const bool one_shot_; |
52 void RemoveHandleCloseObserver(); | |
53 void CallCallback(MojoResult result); | |
54 | 55 |
55 base::WeakPtr<gin::Runner> runner_; | 56 base::WeakPtr<gin::Runner> runner_; |
56 | 57 Watcher watcher_; |
57 common::HandleWatcher handle_watcher_; | |
58 | |
59 HandleWrapper* handle_wrapper_; | |
60 base::WeakPtrFactory<WaitingCallback> weak_factory_; | 58 base::WeakPtrFactory<WaitingCallback> weak_factory_; |
61 | 59 |
62 DISALLOW_COPY_AND_ASSIGN(WaitingCallback); | 60 DISALLOW_COPY_AND_ASSIGN(WaitingCallback); |
63 }; | 61 }; |
64 | 62 |
65 } // namespace js | 63 } // namespace js |
66 } // namespace edk | 64 } // namespace edk |
67 } // namespace mojo | 65 } // namespace mojo |
68 | 66 |
69 #endif // MOJO_EDK_JS_WAITING_CALLBACK_H_ | 67 #endif // MOJO_EDK_JS_WAITING_CALLBACK_H_ |
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