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1 /* | 1 /* |
2 * Copyright (C) 2012 Google, Inc. All Rights Reserved. | 2 * Copyright (C) 2012 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 | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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25 | 25 |
26 #ifndef Supplementable_h | 26 #ifndef Supplementable_h |
27 #define Supplementable_h | 27 #define Supplementable_h |
28 | 28 |
29 #include "platform/heap/Handle.h" | 29 #include "platform/heap/Handle.h" |
30 #include "wtf/Assertions.h" | 30 #include "wtf/Assertions.h" |
31 #include "wtf/HashMap.h" | 31 #include "wtf/HashMap.h" |
32 #include "wtf/OwnPtr.h" | 32 #include "wtf/OwnPtr.h" |
33 #include "wtf/PassOwnPtr.h" | 33 #include "wtf/PassOwnPtr.h" |
34 | 34 |
35 #if ASSERT_ENABLED | 35 #if ENABLE(ASSERT) |
36 #include "wtf/Threading.h" | 36 #include "wtf/Threading.h" |
37 #endif | 37 #endif |
38 | 38 |
39 namespace WebCore { | 39 namespace WebCore { |
40 | 40 |
41 // What you should know about Supplementable and Supplement | 41 // What you should know about Supplementable and Supplement |
42 // ======================================================== | 42 // ======================================================== |
43 // Supplementable and Supplement instances are meant to be thread local. They | 43 // Supplementable and Supplement instances are meant to be thread local. They |
44 // should only be accessed from within the thread that created them. The | 44 // should only be accessed from within the thread that created them. The |
45 // 2 classes are not designed for safe access from another thread. Violating | 45 // 2 classes are not designed for safe access from another thread. Violating |
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117 | 117 |
118 template<> | 118 template<> |
119 class SupplementTracing<false> { | 119 class SupplementTracing<false> { |
120 public: | 120 public: |
121 virtual ~SupplementTracing() { } | 121 virtual ~SupplementTracing() { } |
122 }; | 122 }; |
123 | 123 |
124 template<typename T, bool isGarbageCollected = false> | 124 template<typename T, bool isGarbageCollected = false> |
125 class SupplementBase : public SupplementTracing<isGarbageCollected> { | 125 class SupplementBase : public SupplementTracing<isGarbageCollected> { |
126 public: | 126 public: |
127 #if SECURITY_ASSERT_ENABLED | 127 #if ENABLE(SECURITY_ASSERT) |
128 virtual bool isRefCountedWrapper() const { return false; } | 128 virtual bool isRefCountedWrapper() const { return false; } |
129 #endif | 129 #endif |
130 | 130 |
131 static void provideTo(SupplementableBase<T, isGarbageCollected>& host, const
char* key, typename SupplementableTraits<T, isGarbageCollected>::SupplementArgu
mentType supplement) | 131 static void provideTo(SupplementableBase<T, isGarbageCollected>& host, const
char* key, typename SupplementableTraits<T, isGarbageCollected>::SupplementArgu
mentType supplement) |
132 { | 132 { |
133 host.provideSupplement(key, supplement); | 133 host.provideSupplement(key, supplement); |
134 } | 134 } |
135 | 135 |
136 static SupplementBase<T, isGarbageCollected>* from(SupplementableBase<T, isG
arbageCollected>& host, const char* key) | 136 static SupplementBase<T, isGarbageCollected>* from(SupplementableBase<T, isG
arbageCollected>& host, const char* key) |
137 { | 137 { |
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176 } | 176 } |
177 | 177 |
178 SupplementBase<T, isGarbageCollected>* requireSupplement(const char* key) | 178 SupplementBase<T, isGarbageCollected>* requireSupplement(const char* key) |
179 { | 179 { |
180 ASSERT(m_threadId == currentThread()); | 180 ASSERT(m_threadId == currentThread()); |
181 return this->m_supplements.get(key); | 181 return this->m_supplements.get(key); |
182 } | 182 } |
183 | 183 |
184 void reattachThread() | 184 void reattachThread() |
185 { | 185 { |
186 #if ASSERT_ENABLED | 186 #if ENABLE(ASSERT) |
187 m_threadId = currentThread(); | 187 m_threadId = currentThread(); |
188 #endif | 188 #endif |
189 } | 189 } |
190 | 190 |
191 virtual void trace(Visitor* visitor) { visitor->trace(m_supplements); } | 191 virtual void trace(Visitor* visitor) { visitor->trace(m_supplements); } |
192 | 192 |
193 void willBeDestroyed() | 193 void willBeDestroyed() |
194 { | 194 { |
195 typedef typename SupplementableTraits<T, isGarbageCollected>::Supplement
Map::iterator SupplementIterator; | 195 typedef typename SupplementableTraits<T, isGarbageCollected>::Supplement
Map::iterator SupplementIterator; |
196 for (SupplementIterator it = m_supplements.begin(); it != m_supplements.
end(); ++it) | 196 for (SupplementIterator it = m_supplements.begin(); it != m_supplements.
end(); ++it) |
197 it->value->willBeDestroyed(); | 197 it->value->willBeDestroyed(); |
198 } | 198 } |
199 | 199 |
200 // FIXME: Oilpan: Make private and remove this ignore once PersistentHeapSup
plementable is removed again. | 200 // FIXME: Oilpan: Make private and remove this ignore once PersistentHeapSup
plementable is removed again. |
201 protected: | 201 protected: |
202 GC_PLUGIN_IGNORE("") | 202 GC_PLUGIN_IGNORE("") |
203 typename SupplementableTraits<T, isGarbageCollected>::SupplementMap m_supple
ments; | 203 typename SupplementableTraits<T, isGarbageCollected>::SupplementMap m_supple
ments; |
204 | 204 |
205 #if ASSERT_ENABLED | 205 #if ENABLE(ASSERT) |
206 protected: | 206 protected: |
207 SupplementableBase() : m_threadId(currentThread()) { } | 207 SupplementableBase() : m_threadId(currentThread()) { } |
208 | 208 |
209 private: | 209 private: |
210 ThreadIdentifier m_threadId; | 210 ThreadIdentifier m_threadId; |
211 #endif | 211 #endif |
212 }; | 212 }; |
213 | 213 |
214 template<typename T> | 214 template<typename T> |
215 class HeapSupplement : public SupplementBase<T, true> { }; | 215 class HeapSupplement : public SupplementBase<T, true> { }; |
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252 }; | 252 }; |
253 | 253 |
254 template<typename T> | 254 template<typename T> |
255 struct ThreadingTrait<WebCore::SupplementableBase<T, true> > { | 255 struct ThreadingTrait<WebCore::SupplementableBase<T, true> > { |
256 static const ThreadAffinity Affinity = ThreadingTrait<T>::Affinity; | 256 static const ThreadAffinity Affinity = ThreadingTrait<T>::Affinity; |
257 }; | 257 }; |
258 | 258 |
259 } // namespace WebCore | 259 } // namespace WebCore |
260 | 260 |
261 #endif // Supplementable_h | 261 #endif // Supplementable_h |
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