mirror of
https://github.com/RGBCube/serenity
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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
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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#include <LibJS/Runtime/FinalizationRegistry.h>
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namespace JS {
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FinalizationRegistry* FinalizationRegistry::create(GlobalObject& global_object, FunctionObject& cleanup_callback)
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{
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return global_object.heap().allocate<FinalizationRegistry>(global_object, cleanup_callback, *global_object.finalization_registry_prototype());
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}
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FinalizationRegistry::FinalizationRegistry(FunctionObject& cleanup_callback, Object& prototype)
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: Object(prototype)
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, WeakContainer(heap())
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, m_cleanup_callback(&cleanup_callback)
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{
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}
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FinalizationRegistry::~FinalizationRegistry()
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{
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}
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void FinalizationRegistry::add_finalization_record(Cell& target, Value held_value, Object* unregister_token)
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{
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VERIFY(!held_value.is_empty());
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m_records.append({ &target, held_value, unregister_token });
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}
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bool FinalizationRegistry::remove_by_token(Object& unregister_token)
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{
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auto removed = false;
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for (auto it = m_records.begin(); it != m_records.end(); ++it) {
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if (it->unregister_token == &unregister_token) {
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it.remove(m_records);
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removed = true;
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}
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}
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return removed;
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}
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void FinalizationRegistry::remove_swept_cells(Badge<Heap>, Vector<Cell*>& cells)
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{
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auto any_cells_were_swept = false;
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for (auto cell : cells) {
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for (auto& record : m_records) {
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if (record.target != cell)
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continue;
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record.target = nullptr;
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any_cells_were_swept = true;
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break;
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}
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}
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if (any_cells_were_swept)
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vm().enqueue_finalization_registry_cleanup_job(*this);
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}
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// 9.13 CleanupFinalizationRegistry ( finalizationRegistry ), https://tc39.es/ecma262/#sec-cleanup-finalization-registry
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void FinalizationRegistry::cleanup(FunctionObject* callback)
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{
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auto& vm = this->vm();
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auto cleanup_callback = callback ?: m_cleanup_callback;
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for (auto it = m_records.begin(); it != m_records.end(); ++it) {
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if (it->target != nullptr)
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continue;
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(void)vm.call(*cleanup_callback, js_undefined(), it->held_value);
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it.remove(m_records);
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if (vm.exception())
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return;
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}
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}
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void FinalizationRegistry::visit_edges(Cell::Visitor& visitor)
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{
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Object::visit_edges(visitor);
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visitor.visit(m_cleanup_callback);
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for (auto& record : m_records) {
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visitor.visit(record.held_value);
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visitor.visit(record.unregister_token);
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}
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}
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}
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