b92871f7ef
While the WeakMap only holds a weak reference to its keys, their accompanying values should be kept alive as long as they're accessible.
39 lines
956 B
C++
39 lines
956 B
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/WeakContainer.h>
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namespace JS {
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class WeakMap final
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: public Object
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, public WeakContainer {
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JS_OBJECT(WeakMap, Object);
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public:
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static WeakMap* create(GlobalObject&);
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explicit WeakMap(Object& prototype);
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virtual ~WeakMap() override;
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HashMap<Cell*, Value> const& values() const { return m_values; };
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HashMap<Cell*, Value>& values() { return m_values; };
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virtual void remove_swept_cells(Badge<Heap>, Span<Cell*>) override;
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private:
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virtual void did_become_zombie() override { deregister(); }
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void visit_edges(Visitor&) override;
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HashMap<Cell*, Value> m_values; // This stores Cell pointers instead of Object pointers to aide with sweeping
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};
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}
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