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/*
* Copyright (C) 2019-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSObject.h"
namespace JSC {
// This is used for sharing interface and implementation. It should not have its own classInfo.
template<unsigned passedNumberOfInternalFields = 1>
class JSInternalFieldObjectImpl : public JSNonFinalObject {
public:
friend class LLIntOffsetsExtractor;
using Base = JSNonFinalObject;
static constexpr unsigned numberOfInternalFields = passedNumberOfInternalFields;
template<typename CellType, SubspaceAccess>
static void subspaceFor(VM&)
{
RELEASE_ASSERT_NOT_REACHED();
}
static size_t allocationSize(Checked<size_t> inlineCapacity)
{
ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
return sizeof(JSInternalFieldObjectImpl);
}
const WriteBarrier<Unknown>& internalField(unsigned index) const
{
ASSERT(index < numberOfInternalFields);
return m_internalFields[index];
}
WriteBarrier<Unknown>& internalField(unsigned index)
{
ASSERT(index < numberOfInternalFields);
return m_internalFields[index];
}
static ptrdiff_t offsetOfInternalFields() { return OBJECT_OFFSETOF(JSInternalFieldObjectImpl, m_internalFields); }
static ptrdiff_t offsetOfInternalField(unsigned index) { return OBJECT_OFFSETOF(JSInternalFieldObjectImpl, m_internalFields) + index * sizeof(WriteBarrier<Unknown>); }
protected:
DECLARE_VISIT_CHILDREN;
JSInternalFieldObjectImpl(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
WriteBarrier<Unknown> m_internalFields[numberOfInternalFields] { };
};
} // namespace JSC
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