mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-08 18:01:37 +00:00
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
/*
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* Copyright (C) 2013-2019 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. ``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 "IndexingType.h"
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#include "JSTypeInfo.h"
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#include "PrototypeKey.h"
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#include "WeakGCMap.h"
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#include <wtf/Lock.h>
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#include <wtf/TriState.h>
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namespace JSC {
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class FunctionExecutable;
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class JSGlobalObject;
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class JSObject;
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class Structure;
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class VM;
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// Tracks the canonical structure an object should be allocated with when inheriting from a given prototype.
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class StructureCache {
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public:
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explicit StructureCache(VM& vm)
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: m_structures(vm)
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{
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}
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void clear() { m_structures.clear(); }
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JS_EXPORT_PRIVATE Structure* emptyObjectStructureForPrototype(JSGlobalObject*, JSObject*, unsigned inlineCapacity, bool makePolyProtoStructure = false, FunctionExecutable* = nullptr);
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JS_EXPORT_PRIVATE Structure* emptyStructureForPrototypeFromBaseStructure(JSGlobalObject*, JSObject*, Structure*);
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JS_EXPORT_PRIVATE Structure* emptyObjectStructureConcurrently(JSGlobalObject*, JSObject* prototype, unsigned inlineCapacity);
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private:
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Structure* createEmptyStructure(JSGlobalObject*, JSObject* prototype, const TypeInfo&, const ClassInfo*, IndexingType, unsigned inlineCapacity, bool makePolyProtoStructure, FunctionExecutable*);
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using StructureMap = WeakGCMap<PrototypeKey, Structure>;
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StructureMap m_structures;
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Lock m_lock;
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};
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} // namespace JSC
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