third_party/WebKit/Source/bindings/core/v8/SharedPersistent.h

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#ifndef SharedPersistent_h
#define SharedPersistent_h

#include "bindings/core/v8/ScopedPersistent.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include <v8.h>

namespace blink {

template <typename T>
class SharedPersistent : public RefCounted<SharedPersistent<T>> {
  WTF_MAKE_NONCOPYABLE(SharedPersistent);

 public:
  static PassRefPtr<SharedPersistent<T>> create(v8::Local<T> value,
                                                v8::Isolate* isolate) {
    return adoptRef(new SharedPersistent<T>(value, isolate));
  }

  v8::Local<T> newLocal(v8::Isolate* isolate) const {
    return m_value.newLocal(isolate);
  }

  bool isEmpty() { return m_value.isEmpty(); }

  void setReference(const v8::Persistent<v8::Object>& parent,
                    v8::Isolate* isolate) {
    m_value.setReference(parent, isolate);
  }

  bool operator==(const SharedPersistent<T>& other) {
    return m_value == other.m_value;
  }

 private:
  explicit SharedPersistent(v8::Local<T> value, v8::Isolate* isolate)
      : m_value(isolate, value) {}
  ScopedPersistent<T> m_value;
};

}  // namespace blink

#endif  // SharedPersistent_h