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31 #ifndef V8GarbageCollected_h
32 #define V8GarbageCollected_h
39 class V8GarbageCollected {
40 WTF_MAKE_NONCOPYABLE(V8GarbageCollected);
42 static T* Cast(v8::Handle<v8::Value> value)
44 ASSERT(value->IsExternal());
45 T* result = static_cast<T*>(value.As<v8::External>()->Value());
46 RELEASE_ASSERT(result->m_handle == value);
51 V8GarbageCollected(v8::Isolate* isolate)
53 , m_handle(isolate, v8::External::New(isolate, static_cast<T*>(this)))
54 , m_releasedToV8GarbageCollector(false)
58 v8::Handle<v8::External> releaseToV8GarbageCollector()
60 ASSERT(!m_handle.isWeak()); // Call this exactly once.
61 m_releasedToV8GarbageCollector = true;
62 v8::Handle<v8::External> result = m_handle.newLocal(m_isolate);
63 m_handle.setWeak(static_cast<T*>(this), &weakCallback);
69 ASSERT(!m_releasedToV8GarbageCollector || m_handle.isEmpty());
72 v8::Isolate* isolate() { return m_isolate; }
75 static void weakCallback(const v8::WeakCallbackData<v8::External, T>& data)
77 T* self = data.GetParameter();
78 self->m_handle.clear();
82 v8::Isolate* m_isolate;
83 ScopedPersistent<v8::External> m_handle;
84 bool m_releasedToV8GarbageCollector;
89 #endif // V8GarbageCollected_h