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1 /* | 1 /* |
2 * Copyright 2014 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2014 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_BASE_ASYNCINVOKER_INL_H_ | 11 #ifndef WEBRTC_BASE_ASYNCINVOKER_INL_H_ |
12 #define WEBRTC_BASE_ASYNCINVOKER_INL_H_ | 12 #define WEBRTC_BASE_ASYNCINVOKER_INL_H_ |
13 | 13 |
| 14 #include "webrtc/base/atomicops.h" |
14 #include "webrtc/base/bind.h" | 15 #include "webrtc/base/bind.h" |
15 #include "webrtc/base/callback.h" | 16 #include "webrtc/base/callback.h" |
16 #include "webrtc/base/criticalsection.h" | 17 #include "webrtc/base/criticalsection.h" |
17 #include "webrtc/base/messagehandler.h" | 18 #include "webrtc/base/messagehandler.h" |
18 #include "webrtc/base/refcount.h" | 19 #include "webrtc/base/refcount.h" |
19 #include "webrtc/base/scoped_ref_ptr.h" | 20 #include "webrtc/base/scoped_ref_ptr.h" |
20 #include "webrtc/base/sigslot.h" | 21 #include "webrtc/base/sigslot.h" |
21 #include "webrtc/base/thread.h" | 22 #include "webrtc/base/thread.h" |
22 | 23 |
23 namespace rtc { | 24 namespace rtc { |
24 | 25 |
25 class AsyncInvoker; | 26 class AsyncInvoker; |
26 | 27 |
27 // Helper class for AsyncInvoker. Runs a task and triggers a callback | 28 // Helper class for AsyncInvoker. Runs a task and triggers a callback |
28 // on the calling thread if necessary. Instances are ref-counted so their | 29 // on the calling thread if necessary. Instances are ref-counted so their |
29 // lifetime can be independent of AsyncInvoker. | 30 // lifetime can be independent of AsyncInvoker. |
30 class AsyncClosure : public RefCountInterface { | 31 class AsyncClosure : public RefCountInterface { |
31 public: | 32 public: |
| 33 explicit AsyncClosure(AsyncInvoker* invoker) : invoker_(invoker) {} |
32 // Runs the asynchronous task, and triggers a callback to the calling | 34 // Runs the asynchronous task, and triggers a callback to the calling |
33 // thread if needed. Should be called from the target thread. | 35 // thread if needed. Should be called from the target thread. |
34 virtual void Execute() = 0; | 36 virtual void Execute() = 0; |
35 protected: | 37 protected: |
36 ~AsyncClosure() override {} | 38 ~AsyncClosure() override; |
| 39 |
| 40 AsyncInvoker* invoker_; |
37 }; | 41 }; |
38 | 42 |
39 // Simple closure that doesn't trigger a callback for the calling thread. | 43 // Simple closure that doesn't trigger a callback for the calling thread. |
40 template <class FunctorT> | 44 template <class FunctorT> |
41 class FireAndForgetAsyncClosure : public AsyncClosure { | 45 class FireAndForgetAsyncClosure : public AsyncClosure { |
42 public: | 46 public: |
43 explicit FireAndForgetAsyncClosure(const FunctorT& functor) | 47 explicit FireAndForgetAsyncClosure(AsyncInvoker* invoker, |
44 : functor_(functor) {} | 48 const FunctorT& functor) |
| 49 : AsyncClosure(invoker), functor_(functor) {} |
45 virtual void Execute() { | 50 virtual void Execute() { |
46 functor_(); | 51 functor_(); |
47 } | 52 } |
48 private: | 53 private: |
49 FunctorT functor_; | 54 FunctorT functor_; |
50 }; | 55 }; |
51 | 56 |
52 // Base class for closures that may trigger a callback for the calling thread. | 57 // Base class for closures that may trigger a callback for the calling thread. |
53 // Listens for the "destroyed" signals from the calling thread and the invoker, | 58 // Listens for the "destroyed" signals from the calling thread and the invoker, |
54 // and cancels the callback to the calling thread if either is destroyed. | 59 // and cancels the callback to the calling thread if either is destroyed. |
55 class NotifyingAsyncClosureBase : public AsyncClosure, | 60 class NotifyingAsyncClosureBase : public AsyncClosure, |
56 public sigslot::has_slots<> { | 61 public sigslot::has_slots<> { |
57 public: | 62 public: |
58 ~NotifyingAsyncClosureBase() override; | 63 ~NotifyingAsyncClosureBase() override; |
59 | 64 |
60 protected: | 65 protected: |
61 NotifyingAsyncClosureBase(AsyncInvoker* invoker, | 66 NotifyingAsyncClosureBase(AsyncInvoker* invoker, |
62 const Location& callback_posted_from, | 67 const Location& callback_posted_from, |
63 Thread* calling_thread); | 68 Thread* calling_thread); |
64 void TriggerCallback(); | 69 void TriggerCallback(); |
65 void SetCallback(const Callback0<void>& callback) { | 70 void SetCallback(const Callback0<void>& callback) { |
66 CritScope cs(&crit_); | 71 CritScope cs(&crit_); |
67 callback_ = callback; | 72 callback_ = callback; |
68 } | 73 } |
69 bool CallbackCanceled() const { return calling_thread_ == NULL; } | 74 bool CallbackCanceled() const { return calling_thread_ == NULL; } |
70 | 75 |
71 private: | 76 private: |
72 AsyncInvoker* invoker_; | |
73 Location callback_posted_from_; | 77 Location callback_posted_from_; |
74 Callback0<void> callback_; | 78 Callback0<void> callback_; |
75 CriticalSection crit_; | 79 CriticalSection crit_; |
76 Thread* calling_thread_; | 80 Thread* calling_thread_; |
77 | 81 |
78 void CancelCallback(); | 82 void CancelCallback(); |
79 }; | 83 }; |
80 | 84 |
81 // Closures that have a non-void return value and require a callback. | 85 // Closures that have a non-void return value and require a callback. |
82 template <class ReturnT, class FunctorT, class HostT> | 86 template <class ReturnT, class FunctorT, class HostT> |
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130 TriggerCallback(); | 134 TriggerCallback(); |
131 } | 135 } |
132 | 136 |
133 private: | 137 private: |
134 FunctorT functor_; | 138 FunctorT functor_; |
135 }; | 139 }; |
136 | 140 |
137 } // namespace rtc | 141 } // namespace rtc |
138 | 142 |
139 #endif // WEBRTC_BASE_ASYNCINVOKER_INL_H_ | 143 #endif // WEBRTC_BASE_ASYNCINVOKER_INL_H_ |
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