/* * Copyright (C) 2020 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. ``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 * 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 "PropertyOffset.h" #include "PropertySlot.h" namespace JSC { class DeletePropertySlot { public: enum Type : uint8_t { Uncacheable, DeleteHit, ConfigurableDeleteMiss, Nonconfigurable }; DeletePropertySlot() : m_offset(invalidOffset) , m_cacheability(CachingAllowed) , m_type(Uncacheable) { } void setConfigurableMiss() { m_type = ConfigurableDeleteMiss; } void setNonconfigurable() { m_type = Nonconfigurable; } void setHit(PropertyOffset offset) { m_type = DeleteHit; m_offset = offset; } bool isCacheableDelete() const { return isCacheable() && m_type != Uncacheable; } bool isDeleteHit() const { return m_type == DeleteHit; } bool isConfigurableDeleteMiss() const { return m_type == ConfigurableDeleteMiss; } bool isNonconfigurable() const { return m_type == Nonconfigurable; } PropertyOffset cachedOffset() const { return m_offset; } void disableCaching() { m_cacheability = CachingDisallowed; } private: bool isCacheable() const { return m_cacheability == CachingAllowed; } PropertyOffset m_offset; CacheabilityType m_cacheability; Type m_type; }; } // namespace JSC