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LibJS: Add the FinalizationRegistry built-in object

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As well as the needed functionality in VM to enqueue and run cleanup
jobs for the FinalizationRegistry instances.
This commit is contained in:
Idan Horowitz 2021-06-15 22:16:17 +03:00 • committed by Linus Groh
parent 8c7fe8d6c8
commit de9fa6622a
14 changed files with 365 additions and 20 deletions
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56
Userland/Libraries/LibJS/Runtime/FinalizationRegistryConstructor.cpp Normal file
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/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/FinalizationRegistry.h>
#include <LibJS/Runtime/FinalizationRegistryConstructor.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
FinalizationRegistryConstructor::FinalizationRegistryConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.FinalizationRegistry, *global_object.function_prototype())
{
}
void FinalizationRegistryConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 26.2.2.1 FinalizationRegistry.prototype, https://tc39.es/ecma262/#sec-finalization-registry.prototype
define_property(vm.names.prototype, global_object.finalization_registry_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
}
FinalizationRegistryConstructor::~FinalizationRegistryConstructor()
{
}
// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback
Value FinalizationRegistryConstructor::call()
{
auto& vm = this->vm();
vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.FinalizationRegistry);
return {};
}
// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback
Value FinalizationRegistryConstructor::construct(Function&)
{
auto& vm = this->vm();
auto cleanup_callback = vm.argument(0);
if (!cleanup_callback.is_function()) {
vm.throw_exception<TypeError>(global_object(), ErrorType::NotAFunction, cleanup_callback.to_string_without_side_effects());
return {};
}
// FIXME: Use OrdinaryCreateFromConstructor(NewTarget, "%FinalizationRegistry.prototype%")
return FinalizationRegistry::create(global_object(), cleanup_callback.as_function());
}
}