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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/builtins/builtins-utils-inl.h"
#include "src/logging/counters.h"
#include "src/objects/js-weak-refs-inl.h"
namespace v8 {
namespace internal {
// https://tc39.es/ecma262/#sec-finalization-registry.prototype.unregister
BUILTIN(FinalizationRegistryUnregister) {
HandleScope scope(isolate);
const char* method_name = "FinalizationRegistry.prototype.unregister";
// 1. Let finalizationGroup be the this value.
//
// 2. Perform ? RequireInternalSlot(finalizationRegistry, [[Cells]]).
CHECK_RECEIVER(JSFinalizationRegistry, finalization_registry, method_name);
Handle<Object> unregister_token = args.atOrUndefined(isolate, 1);
// 3. If CanBeHeldWeakly(unregisterToken) is false, throw a TypeError
// exception.
if (!Object::CanBeHeldWeakly(*unregister_token)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kInvalidWeakRefsUnregisterToken,
unregister_token));
}
bool success = JSFinalizationRegistry::Unregister(
finalization_registry, Handle<HeapObject>::cast(unregister_token),
isolate);
return *isolate->factory()->ToBoolean(success);
}
} // namespace internal
} // namespace v8
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