mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/*
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* Copyright (C) 2013, 2016 Apple Inc. All rights reserved.
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* Copyright (C) 2018 Igalia S.L.
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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 "JSCJSValue.h"
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#include "Weak.h"
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namespace JSC {
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class JSObject;
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class JSString;
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class WeakHandleOwner;
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class JSWeakValue {
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public:
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JSWeakValue() = default;
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~JSWeakValue();
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void clear();
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bool isClear() const;
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bool isSet() const { return m_tag != WeakTypeTag::NotSet; }
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bool isPrimitive() const { return m_tag == WeakTypeTag::Primitive; }
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bool isObject() const { return m_tag == WeakTypeTag::Object; }
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bool isString() const { return m_tag == WeakTypeTag::String; }
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void setPrimitive(JSValue);
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void setObject(JSObject*, WeakHandleOwner&, void* context);
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void setString(JSString*, WeakHandleOwner&, void* context);
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JSObject* object() const
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{
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ASSERT(isObject());
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return m_value.object.get();
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}
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JSValue primitive() const
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{
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ASSERT(isPrimitive());
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return m_value.primitive;
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}
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JSString* string() const
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{
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ASSERT(isString());
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return m_value.string.get();
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}
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private:
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enum class WeakTypeTag { NotSet, Primitive, Object, String };
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WeakTypeTag m_tag { WeakTypeTag::NotSet };
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union WeakValueUnion {
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WeakValueUnion()
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: primitive(JSValue())
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{
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}
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~WeakValueUnion()
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{
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ASSERT(!primitive);
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}
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JSValue primitive;
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Weak<JSObject> object;
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Weak<JSString> string;
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} m_value;
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};
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} // namespace JSC
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