class V8::Context

def lock_scope_and_enter
  current = Context.current
  Context.current = self
  V8::C::Locker() do
    V8::C::HandleScope() do
      begin
        @native.Enter()
        yield if block_given?
      ensure
        @native.Exit()
      end
    end
  end
ensure
  Context.current = current
end