mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
/*
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* Copyright (C) 2019 Apple 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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#pragma once
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#include "JSObject.h"
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namespace JSC {
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// This is used for sharing interface and implementation. It should not have its own classInfo.
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template<unsigned passedNumberOfInternalFields = 1>
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class JSInternalFieldObjectImpl : public JSNonFinalObject {
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public:
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friend class LLIntOffsetsExtractor;
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using Base = JSNonFinalObject;
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static constexpr unsigned numberOfInternalFields = passedNumberOfInternalFields;
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template<typename CellType, SubspaceAccess>
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static void subspaceFor(VM&)
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{
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RELEASE_ASSERT_NOT_REACHED();
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}
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static size_t allocationSize(Checked<size_t> inlineCapacity)
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{
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ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
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return sizeof(JSInternalFieldObjectImpl);
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}
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const WriteBarrier<Unknown>& internalField(unsigned index) const
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{
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ASSERT(index < numberOfInternalFields);
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return m_internalFields[index];
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}
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WriteBarrier<Unknown>& internalField(unsigned index)
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{
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ASSERT(index < numberOfInternalFields);
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return m_internalFields[index];
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}
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static ptrdiff_t offsetOfInternalFields() { return OBJECT_OFFSETOF(JSInternalFieldObjectImpl, m_internalFields); }
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static ptrdiff_t offsetOfInternalField(unsigned index) { return OBJECT_OFFSETOF(JSInternalFieldObjectImpl, m_internalFields) + index * sizeof(WriteBarrier<Unknown>); }
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protected:
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static void visitChildren(JSCell*, SlotVisitor&);
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JSInternalFieldObjectImpl(VM& vm, Structure* structure)
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: Base(vm, structure)
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{
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}
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WriteBarrier<Unknown> m_internalFields[numberOfInternalFields] { };
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};
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} // namespace JSC
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