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1 /* | 1 /* |
2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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59 // way of WebPrivatePtr<>. | 59 // way of WebPrivatePtr<>. |
60 enum class WebPrivatePtrStrength { | 60 enum class WebPrivatePtrStrength { |
61 Normal, | 61 Normal, |
62 Weak, | 62 Weak, |
63 }; | 63 }; |
64 | 64 |
65 #if INSIDE_BLINK | 65 #if INSIDE_BLINK |
66 enum LifetimeManagementType { | 66 enum LifetimeManagementType { |
67 RefCountedLifetime, | 67 RefCountedLifetime, |
68 GarbageCollectedLifetime, | 68 GarbageCollectedLifetime, |
69 RefCountedGarbageCollectedLifetime | |
70 }; | 69 }; |
71 | 70 |
72 template<typename T> | 71 template<typename T> |
73 struct LifetimeOf { | 72 struct LifetimeOf { |
74 private: | 73 private: |
75 static const bool isGarbageCollected = WTF::IsSubclassOfTemplate<T, GarbageC
ollected>::value || IsGarbageCollectedMixin<T>::value; | 74 static const bool isGarbageCollected = WTF::IsSubclassOfTemplate<T, GarbageC
ollected>::value || IsGarbageCollectedMixin<T>::value; |
76 static const bool isRefCountedGarbageCollected = WTF::IsSubclassOfTemplate<T
, RefCountedGarbageCollected>::value; | |
77 public: | 75 public: |
78 static const LifetimeManagementType value = | 76 static const LifetimeManagementType value = !isGarbageCollected ? RefCounted
Lifetime : GarbageCollectedLifetime; |
79 !isGarbageCollected ? RefCountedLifetime : | |
80 isRefCountedGarbageCollected ? RefCountedGarbageCollectedLifetime : Garb
ageCollectedLifetime; | |
81 }; | 77 }; |
82 | 78 |
83 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak, LifetimeManagementType lifetime> | 79 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak, LifetimeManagementType lifetime> |
84 class PtrStorageImpl; | 80 class PtrStorageImpl; |
85 | 81 |
86 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak> | 82 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak> |
87 class PtrStorageImpl<T, crossThreadDestruction, strongOrWeak, RefCountedLifetime
> { | 83 class PtrStorageImpl<T, crossThreadDestruction, strongOrWeak, RefCountedLifetime
> { |
88 public: | 84 public: |
89 typedef PassRefPtr<T> BlinkPtrType; | 85 typedef PassRefPtr<T> BlinkPtrType; |
90 | 86 |
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166 { | 162 { |
167 delete m_handle; | 163 delete m_handle; |
168 m_handle = 0; | 164 m_handle = 0; |
169 } | 165 } |
170 | 166 |
171 private: | 167 private: |
172 typename WebPrivatePtrPersistentStorageType<T, crossThreadDestruction, stron
gOrWeak>::Type* m_handle; | 168 typename WebPrivatePtrPersistentStorageType<T, crossThreadDestruction, stron
gOrWeak>::Type* m_handle; |
173 }; | 169 }; |
174 | 170 |
175 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak> | 171 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak> |
176 class PtrStorageImpl<T, crossThreadDestruction, strongOrWeak, RefCountedGarbageC
ollectedLifetime> : public PtrStorageImpl<T, crossThreadDestruction, strongOrWea
k, GarbageCollectedLifetime> { | |
177 public: | |
178 void assign(T* val) { PtrStorageImpl<T, crossThreadDestruction, strongOrWeak
, GarbageCollectedLifetime>::assign(val); } | |
179 | |
180 void assign(const PtrStorageImpl& other) { PtrStorageImpl<T, crossThreadDest
ruction, strongOrWeak, GarbageCollectedLifetime>::assign(other.get()); } | |
181 }; | |
182 | |
183 template<typename T, WebPrivatePtrDestruction crossThreadDestruction, WebPrivate
PtrStrength strongOrWeak> | |
184 class PtrStorage : public PtrStorageImpl<T, crossThreadDestruction, strongOrWeak
, LifetimeOf<T>::value> { | 172 class PtrStorage : public PtrStorageImpl<T, crossThreadDestruction, strongOrWeak
, LifetimeOf<T>::value> { |
185 public: | 173 public: |
186 static PtrStorage& fromSlot(void** slot) | 174 static PtrStorage& fromSlot(void** slot) |
187 { | 175 { |
188 static_assert(sizeof(PtrStorage) == sizeof(void*), "PtrStorage must be t
he size of a pointer"); | 176 static_assert(sizeof(PtrStorage) == sizeof(void*), "PtrStorage must be t
he size of a pointer"); |
189 return *reinterpret_cast<PtrStorage*>(slot); | 177 return *reinterpret_cast<PtrStorage*>(slot); |
190 } | 178 } |
191 | 179 |
192 static const PtrStorage& fromSlot(void* const* slot) | 180 static const PtrStorage& fromSlot(void* const* slot) |
193 { | 181 { |
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307 // Disable the copy constructor; classes that contain a WebPrivatePtr | 295 // Disable the copy constructor; classes that contain a WebPrivatePtr |
308 // should implement their copy constructor using assign(). | 296 // should implement their copy constructor using assign(). |
309 WebPrivatePtr(const WebPrivatePtr&); | 297 WebPrivatePtr(const WebPrivatePtr&); |
310 | 298 |
311 void* m_storage; | 299 void* m_storage; |
312 }; | 300 }; |
313 | 301 |
314 } // namespace blink | 302 } // namespace blink |
315 | 303 |
316 #endif // WebPrivatePtr_h | 304 #endif // WebPrivatePtr_h |
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