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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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_REF_COUNTED_H_ | 5 #ifndef BASE_REF_COUNTED_H_ |
6 #define BASE_REF_COUNTED_H_ | 6 #define BASE_REF_COUNTED_H_ |
7 | 7 |
8 #include "base/atomic_ref_count.h" | 8 #include "base/atomic_ref_count.h" |
9 #include "base/thread_collision_warner.h" | 9 #include "base/thread_collision_warner.h" |
10 | 10 |
11 namespace base { | 11 namespace base { |
12 | 12 |
13 namespace subtle { | 13 namespace subtle { |
14 | 14 |
15 class RefCountedBase { | 15 class RefCountedBase { |
16 public: | 16 public: |
17 static bool ImplementsThreadSafeReferenceCounting() { return false; } | |
18 | |
19 bool HasOneRef() const { return ref_count_ == 1; } | 17 bool HasOneRef() const { return ref_count_ == 1; } |
20 | 18 |
21 protected: | 19 protected: |
22 RefCountedBase(); | 20 RefCountedBase(); |
23 ~RefCountedBase(); | 21 ~RefCountedBase(); |
24 | 22 |
25 void AddRef(); | 23 void AddRef(); |
26 | 24 |
27 // Returns true if the object should self-delete. | 25 // Returns true if the object should self-delete. |
28 bool Release(); | 26 bool Release(); |
29 | 27 |
30 private: | 28 private: |
31 int ref_count_; | 29 int ref_count_; |
32 #ifndef NDEBUG | 30 #ifndef NDEBUG |
33 bool in_dtor_; | 31 bool in_dtor_; |
34 #endif | 32 #endif |
35 | 33 |
36 DFAKE_MUTEX(add_release_); | 34 DFAKE_MUTEX(add_release_); |
37 | 35 |
38 DISALLOW_COPY_AND_ASSIGN(RefCountedBase); | 36 DISALLOW_COPY_AND_ASSIGN(RefCountedBase); |
39 }; | 37 }; |
40 | 38 |
41 class RefCountedThreadSafeBase { | 39 class RefCountedThreadSafeBase { |
42 public: | 40 public: |
43 static bool ImplementsThreadSafeReferenceCounting() { return true; } | |
44 | |
45 bool HasOneRef() const; | 41 bool HasOneRef() const; |
46 | 42 |
47 protected: | 43 protected: |
48 RefCountedThreadSafeBase(); | 44 RefCountedThreadSafeBase(); |
49 ~RefCountedThreadSafeBase(); | 45 ~RefCountedThreadSafeBase(); |
50 | 46 |
51 void AddRef(); | 47 void AddRef(); |
52 | 48 |
53 // Returns true if the object should self-delete. | 49 // Returns true if the object should self-delete. |
54 bool Release(); | 50 bool Release(); |
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243 | 239 |
244 void swap(scoped_refptr<T>& r) { | 240 void swap(scoped_refptr<T>& r) { |
245 swap(&r.ptr_); | 241 swap(&r.ptr_); |
246 } | 242 } |
247 | 243 |
248 protected: | 244 protected: |
249 T* ptr_; | 245 T* ptr_; |
250 }; | 246 }; |
251 | 247 |
252 #endif // BASE_REF_COUNTED_H_ | 248 #endif // BASE_REF_COUNTED_H_ |
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