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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 {
BUILTIN(FinalizationRegistryUnregister) {
HandleScope scope(isolate);
const char* method_name = "FinalizationRegistry.prototype.unregister";
// 1. Let finalizationGroup be the this value.
//
// 2. If Type(finalizationGroup) is not Object, throw a TypeError
// exception.
//
// 3. If finalizationGroup does not have a [[Cells]] internal slot,
// throw a TypeError exception.
CHECK_RECEIVER(JSFinalizationRegistry, finalization_registry, method_name);
Handle<Object> unregister_token = args.atOrUndefined(isolate, 1);
// 4. If Type(unregisterToken) is not Object, throw a TypeError exception.
if (!unregister_token->IsJSReceiver()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError(MessageTemplate::kWeakRefsUnregisterTokenMustBeObject,
unregister_token));
}
bool success = JSFinalizationRegistry::Unregister(
finalization_registry, Handle<JSReceiver>::cast(unregister_token),
isolate);
return *isolate->factory()->ToBoolean(success);
}
} // namespace internal
} // namespace v8
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