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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // This file contains utility functions and classes that help the | 5 // This file contains utility functions and classes that help the |
6 // implementation, and management of the Callback objects. | 6 // implementation, and management of the Callback objects. |
7 | 7 |
8 #ifndef BASE_CALLBACK_INTERNAL_H_ | 8 #ifndef BASE_CALLBACK_INTERNAL_H_ |
9 #define BASE_CALLBACK_INTERNAL_H_ | 9 #define BASE_CALLBACK_INTERNAL_H_ |
10 | 10 |
11 #include <stddef.h> | 11 #include <stddef.h> |
12 #include <memory> | 12 #include <memory> |
13 #include <type_traits> | 13 #include <type_traits> |
14 #include <vector> | 14 #include <vector> |
15 | 15 |
16 #include "base/atomic_ref_count.h" | 16 #include "base/atomic_ref_count.h" |
17 #include "base/base_export.h" | 17 #include "base/base_export.h" |
18 #include "base/callback_forward.h" | 18 #include "base/callback_forward.h" |
19 #include "base/macros.h" | 19 #include "base/macros.h" |
20 #include "base/memory/ref_counted.h" | 20 #include "base/memory/ref_counted.h" |
21 #include "base/memory/scoped_ptr.h" | |
22 | 21 |
23 namespace base { | 22 namespace base { |
24 namespace internal { | 23 namespace internal { |
25 template <CopyMode copy_mode> | 24 template <CopyMode copy_mode> |
26 class CallbackBase; | 25 class CallbackBase; |
27 | 26 |
28 // BindStateBase is used to provide an opaque handle that the Callback | 27 // BindStateBase is used to provide an opaque handle that the Callback |
29 // class can use to represent a function object with bound arguments. It | 28 // class can use to represent a function object with bound arguments. It |
30 // behaves as an existential type that is used by a corresponding | 29 // behaves as an existential type that is used by a corresponding |
31 // DoInvoke function to perform the function execution. This allows | 30 // DoInvoke function to perform the function execution. This allows |
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237 template <typename T> | 236 template <typename T> |
238 typename std::enable_if<IsMoveOnlyType<T>::value, T>::type CallbackForward( | 237 typename std::enable_if<IsMoveOnlyType<T>::value, T>::type CallbackForward( |
239 T& t) { | 238 T& t) { |
240 return std::move(t); | 239 return std::move(t); |
241 } | 240 } |
242 | 241 |
243 } // namespace internal | 242 } // namespace internal |
244 } // namespace base | 243 } // namespace base |
245 | 244 |
246 #endif // BASE_CALLBACK_INTERNAL_H_ | 245 #endif // BASE_CALLBACK_INTERNAL_H_ |
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