Create an executor_work_guard object.

template<
    typename T>
executor_work_guard< typename associated_executor< T >::type > make_work_guard(
    const T & t,
    typename enable_if< !is_executor< T >::value &&!execution::is_executor< T >::value &&!is_convertible< T &, execution_context & >::value >::type *  = 0);