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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 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 BASE_SINGLETON_H_ | 5 #ifndef BASE_SINGLETON_H_ |
6 #define BASE_SINGLETON_H_ | 6 #define BASE_SINGLETON_H_ |
7 | 7 |
8 #include "base/at_exit.h" | 8 #include "base/at_exit.h" |
9 #include "base/atomicops.h" | 9 #include "base/atomicops.h" |
10 #include "base/dynamic_annotations.h" | |
11 #include "base/platform_thread.h" | 10 #include "base/platform_thread.h" |
| 11 #include "base/third_party/dynamic_annotations/dynamic_annotations.h" |
12 | 12 |
13 // Default traits for Singleton<Type>. Calls operator new and operator delete on | 13 // Default traits for Singleton<Type>. Calls operator new and operator delete on |
14 // the object. Registers automatic deletion at process exit. | 14 // the object. Registers automatic deletion at process exit. |
15 // Overload if you need arguments or another memory allocation function. | 15 // Overload if you need arguments or another memory allocation function. |
16 template<typename Type> | 16 template<typename Type> |
17 struct DefaultSingletonTraits { | 17 struct DefaultSingletonTraits { |
18 // Allocates the object. | 18 // Allocates the object. |
19 static Type* New() { | 19 static Type* New() { |
20 // The parenthesis is very important here; it forces POD type | 20 // The parenthesis is very important here; it forces POD type |
21 // initialization. | 21 // initialization. |
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230 base::subtle::NoBarrier_AtomicExchange(&instance_, 0))); | 230 base::subtle::NoBarrier_AtomicExchange(&instance_, 0))); |
231 } | 231 } |
232 static base::subtle::AtomicWord instance_; | 232 static base::subtle::AtomicWord instance_; |
233 }; | 233 }; |
234 | 234 |
235 template <typename Type, typename Traits, typename DifferentiatingType> | 235 template <typename Type, typename Traits, typename DifferentiatingType> |
236 base::subtle::AtomicWord Singleton<Type, Traits, DifferentiatingType>:: | 236 base::subtle::AtomicWord Singleton<Type, Traits, DifferentiatingType>:: |
237 instance_ = 0; | 237 instance_ = 0; |
238 | 238 |
239 #endif // BASE_SINGLETON_H_ | 239 #endif // BASE_SINGLETON_H_ |
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