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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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