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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
103 lines
4.0 KiB
C++
103 lines
4.0 KiB
C++
/*
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* Copyright (C) 2009 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_BINDINGS_CORE_V8_V8VALUECACHE_H_
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#define SKY_ENGINE_BINDINGS_CORE_V8_V8VALUECACHE_H_
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#include "sky/engine/bindings/core/v8/V8PersistentValueMap.h"
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#include "sky/engine/wtf/HashMap.h"
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#include "sky/engine/wtf/RefPtr.h"
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#include "sky/engine/wtf/text/AtomicString.h"
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#include "sky/engine/wtf/text/WTFString.h"
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#include "v8/include/v8.h"
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namespace blink {
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class StringCacheMapTraits : public V8PersistentValueMapTraits<StringImpl*, v8::String, true> {
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public:
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// Weak traits:
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typedef StringImpl WeakCallbackDataType;
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typedef v8::PersistentValueMap<StringImpl*, v8::String, StringCacheMapTraits> MapType;
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static WeakCallbackDataType* WeakCallbackParameter(
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MapType* map, StringImpl* key, v8::Local<v8::String>& value) { return key; }
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static void DisposeCallbackData(WeakCallbackDataType* callbackData) { }
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static MapType* MapFromWeakCallbackData(
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const v8::WeakCallbackData<v8::String, WeakCallbackDataType>&);
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static StringImpl* KeyFromWeakCallbackData(
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const v8::WeakCallbackData<v8::String, WeakCallbackDataType>& data)
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{
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return data.GetParameter();
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}
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static void Dispose(v8::Isolate*, v8::UniquePersistent<v8::String> value, StringImpl* key);
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};
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class StringCache {
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public:
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StringCache(v8::Isolate* isolate) : m_stringCache(isolate) { }
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~StringCache();
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v8::Handle<v8::String> v8ExternalString(StringImpl* stringImpl, v8::Isolate* isolate)
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{
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ASSERT(stringImpl);
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if (m_lastStringImpl.get() == stringImpl)
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return m_lastV8String.NewLocal(isolate);
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return v8ExternalStringSlow(stringImpl, isolate);
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}
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void setReturnValueFromString(v8::ReturnValue<v8::Value> returnValue, StringImpl* stringImpl)
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{
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ASSERT(stringImpl);
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if (m_lastStringImpl.get() == stringImpl)
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m_lastV8String.SetReturnValue(returnValue);
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else
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setReturnValueFromStringSlow(returnValue, stringImpl);
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}
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friend class StringCacheMapTraits;
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private:
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v8::Handle<v8::String> v8ExternalStringSlow(StringImpl*, v8::Isolate*);
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void setReturnValueFromStringSlow(v8::ReturnValue<v8::Value>, StringImpl*);
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v8::Local<v8::String> createStringAndInsertIntoCache(StringImpl*, v8::Isolate*);
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void InvalidateLastString();
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StringCacheMapTraits::MapType m_stringCache;
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StringCacheMapTraits::MapType::PersistentValueReference m_lastV8String;
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// Note: RefPtr is a must as we cache by StringImpl* equality, not identity
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// hence lastStringImpl might be not a key of the cache (in sense of identity)
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// and hence it's not refed on addition.
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RefPtr<StringImpl> m_lastStringImpl;
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};
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} // namespace blink
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#endif // SKY_ENGINE_BINDINGS_CORE_V8_V8VALUECACHE_H_
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