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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2015 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 MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ | 5 #ifndef MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ |
6 #define MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ | 6 #define MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ |
7 | 7 |
8 #include "base/bind.h" | 8 #include "base/bind.h" |
9 #include "base/location.h" | 9 #include "base/location.h" |
10 #include "base/message_loop/message_loop_proxy.h" | |
11 #include "base/single_thread_task_runner.h" | 10 #include "base/single_thread_task_runner.h" |
12 #include "base/thread_task_runner_handle.h" | 11 #include "base/thread_task_runner_handle.h" |
13 | 12 |
14 // This is a helper utility for base::Bind()ing callbacks to the current | 13 // This is a helper utility for base::Bind()ing callbacks to the current |
15 // MessageLoop. The typical use is when |a| (of class |A|) wants to hand a | 14 // MessageLoop. The typical use is when |a| (of class |A|) wants to hand a |
16 // callback such as base::Bind(&A::AMethod, a) to |b|, but needs to ensure that | 15 // callback such as base::Bind(&A::AMethod, a) to |b|, but needs to ensure that |
17 // when |b| executes the callback, it does so on |a|'s current MessageLoop. | 16 // when |b| executes the callback, it does so on |a|'s current MessageLoop. |
18 // | 17 // |
19 // Typical usage: request to be called back on the current thread: | 18 // Typical usage: request to be called back on the current thread: |
20 // other->StartAsyncProcessAndCallMeBack( | 19 // other->StartAsyncProcessAndCallMeBack( |
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61 template<typename T> | 60 template<typename T> |
62 static base::Callback<T> BindToCurrentLoop( | 61 static base::Callback<T> BindToCurrentLoop( |
63 const base::Callback<T>& cb) { | 62 const base::Callback<T>& cb) { |
64 return base::Bind(&internal::TrampolineHelper<T>::Run, | 63 return base::Bind(&internal::TrampolineHelper<T>::Run, |
65 base::ThreadTaskRunnerHandle::Get(), cb); | 64 base::ThreadTaskRunnerHandle::Get(), cb); |
66 } | 65 } |
67 | 66 |
68 } // namespace media | 67 } // namespace media |
69 | 68 |
70 #endif // MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ | 69 #endif // MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ |
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