+template<class F>
+typename std::result_of<F()>::type kernel(F&& code)
+{
+ typedef typename std::result_of<F()>::type R;
+ std::promise<R> promise;
+ simcall_run_kernel([&]{
+ try {
+ promise.set_value(code());
+ }
+ catch(...) {
+ promise.set_exception(std::current_exception());
+ }
+ });
+ return promise.get_future().get();
+}
+