Using libuv inside classes

I am trying to write a nodejs bindings for a C++ library and I seem to have hit a roadblock.

I am working on trying to make all the calls to the C++ library asynchronous and thats why I am using libuv. I am basically following this tutorial.

I want to be able to call class member functions from libuv's uv_queue_work. Have a look at this code --

class test {
  private:
    int data;
    void Work(uv_work_t *req);
    void After(uv_work_t *req);
  public:
    Handle<Value> Async(const Arguments& args) {
      HandleScope scope;
      Local<Function> callback = Local<Function>::Cast(args[0]);
      int status = uv_queue_work(uv_default_loop(), **something**, Work, After);
      assert(status == 0);
      return Undefined();
    }
};

Basically I expect the Work and After functions to work on the data element of the class. However this doesnt seem to work. I have tried typecasting the pointers to Work and After after from type void test::(*)(uv_work_t*) to void (*)(uv_work_t*). But that also doesnt seem to work.

Could you guys give me some tips on how to work around this??