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4ab80f640b
I also removed COMPILER_SUPPORTS since all of the checks were for old versions of GCC which we no longer support. Mojo requires GCC 4.8 or later. R=abarth@chromium.org Review URL: https://codereview.chromium.org/714393002
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "config.h"
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#include "bindings/core/v8/ScriptWrappable.h"
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#include "bindings/core/v8/DOMDataStore.h"
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#include "bindings/core/v8/V8DOMWrapper.h"
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namespace blink {
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struct SameSizeAsScriptWrappableBase { };
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COMPILE_ASSERT(sizeof(ScriptWrappableBase) <= sizeof(SameSizeAsScriptWrappableBase), ScriptWrappableBase_should_stay_small);
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struct SameSizeAsScriptWrappable : public ScriptWrappableBase {
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virtual ~SameSizeAsScriptWrappable() { }
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uintptr_t m_wrapperOrTypeInfo;
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};
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COMPILE_ASSERT(sizeof(ScriptWrappable) <= sizeof(SameSizeAsScriptWrappable), ScriptWrappable_should_stay_small);
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namespace {
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class ScriptWrappableBaseProtector {
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WTF_MAKE_NONCOPYABLE(ScriptWrappableBaseProtector);
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public:
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ScriptWrappableBaseProtector(ScriptWrappableBase* scriptWrappableBase, const WrapperTypeInfo* wrapperTypeInfo)
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: m_scriptWrappableBase(scriptWrappableBase), m_wrapperTypeInfo(wrapperTypeInfo)
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{
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m_wrapperTypeInfo->refObject(m_scriptWrappableBase);
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}
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~ScriptWrappableBaseProtector()
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{
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m_wrapperTypeInfo->derefObject(m_scriptWrappableBase);
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}
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private:
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ScriptWrappableBase* m_scriptWrappableBase;
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const WrapperTypeInfo* m_wrapperTypeInfo;
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};
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} // namespace
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v8::Handle<v8::Object> ScriptWrappable::wrap(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
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{
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const WrapperTypeInfo* wrapperTypeInfo = this->wrapperTypeInfo();
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// It's possible that no one except for the new wrapper owns this object at
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// this moment, so we have to prevent GC to collect this object until the
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// object gets associated with the wrapper.
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ScriptWrappableBaseProtector protect(this, wrapperTypeInfo);
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ASSERT(!DOMDataStore::containsWrapperNonTemplate(this, isolate));
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v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, wrapperTypeInfo, toScriptWrappableBase(), isolate);
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if (UNLIKELY(wrapper.IsEmpty()))
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return wrapper;
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wrapperTypeInfo->installConditionallyEnabledProperties(wrapper, isolate);
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return associateWithWrapper(wrapperTypeInfo, wrapper, isolate);
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}
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v8::Handle<v8::Object> ScriptWrappable::associateWithWrapper(const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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return V8DOMWrapper::associateObjectWithWrapperNonTemplate(this, wrapperTypeInfo, wrapper, isolate);
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}
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} // namespace blink
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