mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
/*
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* Copyright (C) 2020 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 "PropertyOffset.h"
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#include "PropertySlot.h"
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namespace JSC {
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class DeletePropertySlot {
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public:
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enum Type : uint8_t { Uncacheable, DeleteHit, ConfigurableDeleteMiss, Nonconfigurable };
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DeletePropertySlot()
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: m_offset(invalidOffset)
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, m_cacheability(CachingAllowed)
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, m_type(Uncacheable)
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{
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}
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void setConfigurableMiss()
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{
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m_type = ConfigurableDeleteMiss;
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}
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void setNonconfigurable()
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{
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m_type = Nonconfigurable;
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}
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void setHit(PropertyOffset offset)
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{
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m_type = DeleteHit;
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m_offset = offset;
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}
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bool isCacheableDelete() const { return isCacheable() && m_type != Uncacheable; }
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bool isDeleteHit() const { return m_type == DeleteHit; }
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bool isConfigurableDeleteMiss() const { return m_type == ConfigurableDeleteMiss; }
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bool isNonconfigurable() const { return m_type == Nonconfigurable; }
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PropertyOffset cachedOffset() const
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{
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return m_offset;
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}
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void disableCaching()
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{
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m_cacheability = CachingDisallowed;
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}
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private:
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bool isCacheable() const { return m_cacheability == CachingAllowed; }
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PropertyOffset m_offset;
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CacheabilityType m_cacheability;
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Type m_type;
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};
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} // namespace JSC
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