mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-15 13:32:38 +00:00
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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* Copyright (C) 2008 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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "JSCast.h"
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#include "JSObject.h"
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#include "Structure.h"
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#include <wtf/StdLibExtras.h>
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#include <wtf/UniqueArray.h>
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namespace JSC {
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class LLIntOffsetsExtractor;
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class Structure;
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class StructureChain final : public JSCell {
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friend class JIT;
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public:
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typedef JSCell Base;
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static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
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static StructureChain* create(VM& vm, JSObject* head)
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{
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StructureChain* chain = new (NotNull, allocateCell<StructureChain>(vm.heap)) StructureChain(vm, vm.structureChainStructure.get());
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chain->finishCreation(vm, head);
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return chain;
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}
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WriteBarrier<Structure>* head() { return m_vector.get(); }
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static void visitChildren(JSCell*, SlotVisitor&);
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static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
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{
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return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
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}
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DECLARE_INFO;
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static const bool needsDestruction = true;
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static void destroy(JSCell*);
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protected:
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void finishCreation(VM& vm, JSObject* head)
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{
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Base::finishCreation(vm);
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size_t size = 0;
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for (JSObject* current = head; current; current = current->structure(vm)->storedPrototypeObject(current))
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++size;
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auto vector = makeUniqueArray<WriteBarrier<Structure>>(size + 1);
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size_t i = 0;
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for (JSObject* current = head; current; current = current->structure(vm)->storedPrototypeObject(current))
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vector[i++].set(vm, this, current->structure(vm));
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vm.heap.mutatorFence();
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m_vector = WTFMove(vector);
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vm.heap.writeBarrier(this);
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}
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private:
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friend class LLIntOffsetsExtractor;
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StructureChain(VM&, Structure*);
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UniqueArray<WriteBarrier<Structure>> m_vector;
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};
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} // namespace JSC
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