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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 <memory> | 8 #include <memory> |
| 9 | 9 |
| 10 #include "base/bind.h" | 10 #include "base/bind.h" |
| 11 #include "base/location.h" | 11 #include "base/location.h" |
| 12 #include "base/memory/scoped_vector.h" | 12 #include "base/memory/scoped_vector.h" |
| 13 #include "base/single_thread_task_runner.h" | 13 #include "base/single_thread_task_runner.h" |
| 14 #include "base/thread_task_runner_handle.h" | 14 #include "base/threading/thread_task_runner_handle.h" |
| 15 | 15 |
| 16 // This is a helper utility for base::Bind()ing callbacks to the current | 16 // This is a helper utility for base::Bind()ing callbacks to the current |
| 17 // MessageLoop. The typical use is when |a| (of class |A|) wants to hand a | 17 // MessageLoop. The typical use is when |a| (of class |A|) wants to hand a |
| 18 // callback such as base::Bind(&A::AMethod, a) to |b|, but needs to ensure that | 18 // callback such as base::Bind(&A::AMethod, a) to |b|, but needs to ensure that |
| 19 // when |b| executes the callback, it does so on |a|'s current MessageLoop. | 19 // when |b| executes the callback, it does so on |a|'s current MessageLoop. |
| 20 // | 20 // |
| 21 // Typical usage: request to be called back on the current thread: | 21 // Typical usage: request to be called back on the current thread: |
| 22 // other->StartAsyncProcessAndCallMeBack( | 22 // other->StartAsyncProcessAndCallMeBack( |
| 23 // media::BindToCurrentLoop(base::Bind(&MyClass::MyMethod, this))); | 23 // media::BindToCurrentLoop(base::Bind(&MyClass::MyMethod, this))); |
| 24 // | 24 // |
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| 65 template<typename T> | 65 template<typename T> |
| 66 static base::Callback<T> BindToCurrentLoop( | 66 static base::Callback<T> BindToCurrentLoop( |
| 67 const base::Callback<T>& cb) { | 67 const base::Callback<T>& cb) { |
| 68 return base::Bind(&internal::TrampolineHelper<T>::Run, | 68 return base::Bind(&internal::TrampolineHelper<T>::Run, |
| 69 base::ThreadTaskRunnerHandle::Get(), cb); | 69 base::ThreadTaskRunnerHandle::Get(), cb); |
| 70 } | 70 } |
| 71 | 71 |
| 72 } // namespace media | 72 } // namespace media |
| 73 | 73 |
| 74 #endif // MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ | 74 #endif // MEDIA_BASE_BIND_TO_CURRENT_LOOP_H_ |
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