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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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27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #ifndef WebPrivatePtr_h | 31 #ifndef WebPrivatePtr_h |
32 #define WebPrivatePtr_h | 32 #define WebPrivatePtr_h |
33 | 33 |
34 #include "WebCommon.h" | 34 #include "WebCommon.h" |
35 | 35 |
36 #if INSIDE_BLINK | 36 #if INSIDE_BLINK |
37 | |
38 namespace blink { template<typename T> class TreeShared; } | |
39 | |
40 #include "platform/heap/Handle.h" | 37 #include "platform/heap/Handle.h" |
41 #include "wtf/PassRefPtr.h" | 38 #include "wtf/PassRefPtr.h" |
42 #include "wtf/TypeTraits.h" | 39 #include "wtf/TypeTraits.h" |
43 #endif | 40 #endif |
44 | 41 |
45 namespace blink { | 42 namespace blink { |
46 | 43 |
47 #if INSIDE_BLINK | 44 #if INSIDE_BLINK |
48 enum LifetimeManagementType { | 45 enum LifetimeManagementType { |
49 RefCountedLifetime, | 46 RefCountedLifetime, |
50 GarbageCollectedLifetime, | 47 GarbageCollectedLifetime, |
51 RefCountedGarbageCollectedLifetime | 48 RefCountedGarbageCollectedLifetime |
52 }; | 49 }; |
53 | 50 |
54 template<typename T> | 51 template<typename T> |
55 class LifetimeOf { | 52 class LifetimeOf { |
56 static const bool isGarbageCollected = WTF::IsSubclassOfTemplate<T, blink::G
arbageCollected>::value; | 53 static const bool isGarbageCollected = WTF::IsSubclassOfTemplate<T, GarbageC
ollected>::value; |
57 static const bool isRefCountedGarbageCollected = WTF::IsSubclassOfTemplate<T
, blink::RefCountedGarbageCollected>::value; | 54 static const bool isRefCountedGarbageCollected = WTF::IsSubclassOfTemplate<T
, RefCountedGarbageCollected>::value; |
58 public: | 55 public: |
59 static const LifetimeManagementType value = | 56 static const LifetimeManagementType value = |
60 !isGarbageCollected ? RefCountedLifetime : | 57 !isGarbageCollected ? RefCountedLifetime : |
61 isRefCountedGarbageCollected ? RefCountedGarbageCollectedLifetime : Garb
ageCollectedLifetime; | 58 isRefCountedGarbageCollected ? RefCountedGarbageCollectedLifetime : Garb
ageCollectedLifetime; |
62 }; | 59 }; |
63 | 60 |
64 template<typename T, LifetimeManagementType lifetime> | 61 template<typename T, LifetimeManagementType lifetime> |
65 class PtrStorageImpl; | 62 class PtrStorageImpl; |
66 | 63 |
67 template<typename T> | 64 template<typename T> |
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99 class PtrStorageImpl<T, GarbageCollectedLifetime> { | 96 class PtrStorageImpl<T, GarbageCollectedLifetime> { |
100 public: | 97 public: |
101 void assign(const RawPtr<T>& val) | 98 void assign(const RawPtr<T>& val) |
102 { | 99 { |
103 if (!val) { | 100 if (!val) { |
104 release(); | 101 release(); |
105 return; | 102 return; |
106 } | 103 } |
107 | 104 |
108 if (!m_handle) | 105 if (!m_handle) |
109 m_handle = new blink::Persistent<T>(); | 106 m_handle = new Persistent<T>(); |
110 | 107 |
111 (*m_handle) = val; | 108 (*m_handle) = val; |
112 } | 109 } |
113 | 110 |
114 void assign(T* ptr) { assign(RawPtr<T>(ptr)); } | 111 void assign(T* ptr) { assign(RawPtr<T>(ptr)); } |
115 template<typename U> void assign(const RawPtr<U>& val) { assign(RawPtr<T>(va
l)); } | 112 template<typename U> void assign(const RawPtr<U>& val) { assign(RawPtr<T>(va
l)); } |
116 | 113 |
117 void assign(const PtrStorageImpl& other) { assign(other.get()); } | 114 void assign(const PtrStorageImpl& other) { assign(other.get()); } |
118 | 115 |
119 T* get() const { return m_handle ? m_handle->get() : 0; } | 116 T* get() const { return m_handle ? m_handle->get() : 0; } |
120 | 117 |
121 void release() | 118 void release() |
122 { | 119 { |
123 delete m_handle; | 120 delete m_handle; |
124 m_handle = 0; | 121 m_handle = 0; |
125 } | 122 } |
126 | 123 |
127 private: | 124 private: |
128 blink::Persistent<T>* m_handle; | 125 Persistent<T>* m_handle; |
129 }; | 126 }; |
130 | 127 |
131 template<typename T> | 128 template<typename T> |
132 class PtrStorageImpl<T, RefCountedGarbageCollectedLifetime> : public PtrStorageI
mpl<T, GarbageCollectedLifetime> { | 129 class PtrStorageImpl<T, RefCountedGarbageCollectedLifetime> : public PtrStorageI
mpl<T, GarbageCollectedLifetime> { |
133 public: | 130 public: |
134 void assign(const PassRefPtrWillBeRawPtr<T>& val) { PtrStorageImpl<T, Garbag
eCollectedLifetime>::assign(val.get()); } | 131 void assign(const PassRefPtrWillBeRawPtr<T>& val) { PtrStorageImpl<T, Garbag
eCollectedLifetime>::assign(val.get()); } |
135 | 132 |
136 void assign(const PtrStorageImpl& other) { PtrStorageImpl<T, GarbageCollecte
dLifetime>::assign(other.get()); } | 133 void assign(const PtrStorageImpl& other) { PtrStorageImpl<T, GarbageCollecte
dLifetime>::assign(other.get()); } |
137 }; | 134 }; |
138 | 135 |
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177 // } | 174 // } |
178 // BLINK_EXPORT void assign(const WebFoo&); // Implemented in the body. | 175 // BLINK_EXPORT void assign(const WebFoo&); // Implemented in the body. |
179 // | 176 // |
180 // // Methods that are exposed to Chromium and which are specific to | 177 // // Methods that are exposed to Chromium and which are specific to |
181 // // WebFoo go here. | 178 // // WebFoo go here. |
182 // BLINK_EXPORT doWebFooThing(); | 179 // BLINK_EXPORT doWebFooThing(); |
183 // | 180 // |
184 // // Methods that are used only by other Blink classes should only be | 181 // // Methods that are used only by other Blink classes should only be |
185 // // declared when INSIDE_BLINK is set. | 182 // // declared when INSIDE_BLINK is set. |
186 // #if INSIDE_BLINK | 183 // #if INSIDE_BLINK |
187 // WebFoo(const WTF::PassRefPtr<blink::Foo>&); | 184 // WebFoo(const WTF::PassRefPtr<Foo>&); |
188 // #endif | 185 // #endif |
189 // | 186 // |
190 // private: | 187 // private: |
191 // WebPrivatePtr<blink::Foo> m_private; | 188 // WebPrivatePtr<Foo> m_private; |
192 // }; | 189 // }; |
193 // | 190 // |
194 // // WebFoo.cpp | 191 // // WebFoo.cpp |
195 // WebFoo::~WebFoo() { m_private.reset(); } | 192 // WebFoo::~WebFoo() { m_private.reset(); } |
196 // void WebFoo::assign(const WebFoo& other) { ... } | 193 // void WebFoo::assign(const WebFoo& other) { ... } |
197 // | 194 // |
198 template <typename T> | 195 template <typename T> |
199 class WebPrivatePtr { | 196 class WebPrivatePtr { |
200 public: | 197 public: |
201 WebPrivatePtr() : m_storage(0) { } | 198 WebPrivatePtr() : m_storage(0) { } |
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264 // Disable the copy constructor; classes that contain a WebPrivatePtr | 261 // Disable the copy constructor; classes that contain a WebPrivatePtr |
265 // should implement their copy constructor using assign(). | 262 // should implement their copy constructor using assign(). |
266 WebPrivatePtr(const WebPrivatePtr<T>&); | 263 WebPrivatePtr(const WebPrivatePtr<T>&); |
267 | 264 |
268 void* m_storage; | 265 void* m_storage; |
269 }; | 266 }; |
270 | 267 |
271 } // namespace blink | 268 } // namespace blink |
272 | 269 |
273 #endif | 270 #endif |
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