Use std::call_once to construct singeltons
By using call_once from C++11, we can simplify the logic in code
where we are querying const variables from multiple threads.
close #246 (closed).
Edited by Haocheng LIU
By using call_once from C++11, we can simplify the logic in code
where we are querying const variables from multiple threads.
close #246 (closed).