86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Runtime/FinalizationRegistry.h>
|
|
|
|
namespace JS {
|
|
|
|
FinalizationRegistry* FinalizationRegistry::create(GlobalObject& global_object, FunctionObject& cleanup_callback)
|
|
{
|
|
return global_object.heap().allocate<FinalizationRegistry>(global_object, cleanup_callback, *global_object.finalization_registry_prototype());
|
|
}
|
|
|
|
FinalizationRegistry::FinalizationRegistry(FunctionObject& cleanup_callback, Object& prototype)
|
|
: Object(prototype)
|
|
, WeakContainer(heap())
|
|
, m_cleanup_callback(&cleanup_callback)
|
|
{
|
|
}
|
|
|
|
FinalizationRegistry::~FinalizationRegistry()
|
|
{
|
|
}
|
|
|
|
void FinalizationRegistry::add_finalization_record(Cell& target, Value held_value, Object* unregister_token)
|
|
{
|
|
VERIFY(!held_value.is_empty());
|
|
m_records.append({ &target, held_value, unregister_token });
|
|
}
|
|
|
|
bool FinalizationRegistry::remove_by_token(Object& unregister_token)
|
|
{
|
|
auto removed = false;
|
|
for (auto it = m_records.begin(); it != m_records.end(); ++it) {
|
|
if (it->unregister_token == &unregister_token) {
|
|
it.remove(m_records);
|
|
removed = true;
|
|
}
|
|
}
|
|
return removed;
|
|
}
|
|
|
|
void FinalizationRegistry::remove_swept_cells(Badge<Heap>, Vector<Cell*>& cells)
|
|
{
|
|
auto any_cells_were_swept = false;
|
|
for (auto cell : cells) {
|
|
for (auto& record : m_records) {
|
|
if (record.target != cell)
|
|
continue;
|
|
record.target = nullptr;
|
|
any_cells_were_swept = true;
|
|
break;
|
|
}
|
|
}
|
|
if (any_cells_were_swept)
|
|
vm().enqueue_finalization_registry_cleanup_job(*this);
|
|
}
|
|
|
|
// 9.13 CleanupFinalizationRegistry ( finalizationRegistry ), https://tc39.es/ecma262/#sec-cleanup-finalization-registry
|
|
void FinalizationRegistry::cleanup(FunctionObject* callback)
|
|
{
|
|
auto& vm = this->vm();
|
|
auto cleanup_callback = callback ?: m_cleanup_callback;
|
|
for (auto it = m_records.begin(); it != m_records.end(); ++it) {
|
|
if (it->target != nullptr)
|
|
continue;
|
|
(void)vm.call(*cleanup_callback, js_undefined(), it->held_value);
|
|
it.remove(m_records);
|
|
if (vm.exception())
|
|
return;
|
|
}
|
|
}
|
|
|
|
void FinalizationRegistry::visit_edges(Cell::Visitor& visitor)
|
|
{
|
|
Object::visit_edges(visitor);
|
|
visitor.visit(m_cleanup_callback);
|
|
for (auto& record : m_records) {
|
|
visitor.visit(record.held_value);
|
|
visitor.visit(record.unregister_token);
|
|
}
|
|
}
|
|
|
|
}
|