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| 1 /* | |
| 2 * Copyright (C) 2009 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef V8ValueCache_h | |
| 27 #define V8ValueCache_h | |
| 28 | |
| 29 #include "bindings/v8/V8PersistentValueMap.h" | |
| 30 #include <v8.h> | |
| 31 #include "wtf/HashMap.h" | |
| 32 #include "wtf/RefPtr.h" | |
| 33 #include "wtf/text/AtomicString.h" | |
| 34 #include "wtf/text/WTFString.h" | |
| 35 | |
| 36 namespace WebCore { | |
| 37 | |
| 38 class StringCacheMapTraits : public V8PersistentValueMapTraits<StringImpl*, v8::
String, true> { | |
| 39 public: | |
| 40 // Weak traits: | |
| 41 typedef StringImpl WeakCallbackDataType; | |
| 42 typedef v8::PersistentValueMap<StringImpl*, v8::String, StringCacheMapTraits
> MapType; | |
| 43 | |
| 44 static WeakCallbackDataType* WeakCallbackParameter( | |
| 45 MapType* map, StringImpl* key, v8::Local<v8::String>& value) { return ke
y; } | |
| 46 static void DisposeCallbackData(WeakCallbackDataType* callbackData) { } | |
| 47 | |
| 48 static MapType* MapFromWeakCallbackData( | |
| 49 const v8::WeakCallbackData<v8::String, WeakCallbackDataType>&); | |
| 50 | |
| 51 static StringImpl* KeyFromWeakCallbackData( | |
| 52 const v8::WeakCallbackData<v8::String, WeakCallbackDataType>& data) | |
| 53 { | |
| 54 return data.GetParameter(); | |
| 55 } | |
| 56 | |
| 57 static void Dispose(v8::Isolate*, v8::UniquePersistent<v8::String> value, St
ringImpl* key); | |
| 58 }; | |
| 59 | |
| 60 | |
| 61 class StringCache { | |
| 62 public: | |
| 63 StringCache(v8::Isolate* isolate) : m_stringCache(isolate) { } | |
| 64 ~StringCache(); | |
| 65 | |
| 66 v8::Handle<v8::String> v8ExternalString(StringImpl* stringImpl, v8::Isolate*
isolate) | |
| 67 { | |
| 68 ASSERT(stringImpl); | |
| 69 if (m_lastStringImpl.get() == stringImpl) | |
| 70 return m_lastV8String.NewLocal(isolate); | |
| 71 return v8ExternalStringSlow(stringImpl, isolate); | |
| 72 } | |
| 73 | |
| 74 void setReturnValueFromString(v8::ReturnValue<v8::Value> returnValue, String
Impl* stringImpl) | |
| 75 { | |
| 76 ASSERT(stringImpl); | |
| 77 if (m_lastStringImpl.get() == stringImpl) | |
| 78 m_lastV8String.SetReturnValue(returnValue); | |
| 79 else | |
| 80 setReturnValueFromStringSlow(returnValue, stringImpl); | |
| 81 } | |
| 82 | |
| 83 friend class StringCacheMapTraits; | |
| 84 | |
| 85 private: | |
| 86 v8::Handle<v8::String> v8ExternalStringSlow(StringImpl*, v8::Isolate*); | |
| 87 void setReturnValueFromStringSlow(v8::ReturnValue<v8::Value>, StringImpl*); | |
| 88 v8::Local<v8::String> createStringAndInsertIntoCache(StringImpl*, v8::Isolat
e*); | |
| 89 void InvalidateLastString(); | |
| 90 | |
| 91 StringCacheMapTraits::MapType m_stringCache; | |
| 92 StringCacheMapTraits::MapType::PersistentValueReference m_lastV8String; | |
| 93 | |
| 94 // Note: RefPtr is a must as we cache by StringImpl* equality, not identity | |
| 95 // hence lastStringImpl might be not a key of the cache (in sense of identit
y) | |
| 96 // and hence it's not refed on addition. | |
| 97 RefPtr<StringImpl> m_lastStringImpl; | |
| 98 }; | |
| 99 | |
| 100 } // namespace WebCore | |
| 101 | |
| 102 #endif // V8ValueCache_h | |
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Chromium Code Reviews
Issue 351423002:
Moved files under Source/bindings/v8 to Source/bindings/core/v8. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk