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https://github.com/LadybirdBrowser/ladybird
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949889f124
A finalized GC::Function should no longer be callable. Clear the underlying AK::Function during finalization so stale references fail as empty callbacks instead of calling through finalized capture storage.
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, Andreas Kling <andreas@ladybird.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/Function.h>
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#include <LibGC/Cell.h>
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#include <LibGC/Heap.h>
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namespace GC {
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template<typename T>
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class Function final : public Cell {
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GC_CELL(Function, Cell);
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GC_DECLARE_ALLOCATOR(Function);
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public:
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static constexpr bool OVERRIDES_FINALIZE = true;
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static Ref<Function> create(Heap& heap, ESCAPING AK::Function<T>&& function)
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{
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return heap.allocate<Function>(move(function));
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}
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virtual ~Function() override = default;
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virtual void finalize() override
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{
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Base::finalize();
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m_function = nullptr;
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}
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[[nodiscard]] AK::Function<T> const& function() const { return m_function; }
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private:
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Function(AK::Function<T>&& function)
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: m_function(move(function))
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{
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}
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virtual void visit_edges(Visitor& visitor) override
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{
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Base::visit_edges(visitor);
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visitor.visit_possible_values(m_function.raw_capture_range());
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}
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AK::Function<T> m_function;
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};
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template<typename Callable, typename T = EquivalentFunctionType<Callable>>
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static Ref<Function<T>> create_function(Heap& heap, ESCAPING Callable&& function)
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{
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return Function<T>::create(heap, AK::Function<T> { forward<Callable>(function) });
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}
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template<typename T>
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GC_DEFINE_ALLOCATOR(Function<T>);
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}
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