std::recursive_mutex g_myDataMutex;
std::string myString ;
void SetValueSync(std::string const in_newValue)
{
        std::lock_guard<std::recursive_mutex> myLock(g_myDataMutex);
        myString = myString + in_newValue;
}
int main()
{
    for (int i = 0; i<10000; i++){
    std::thread t1(SetValueSync, "ABC");
    t1.join();
    std::thread t2(SetValueSync, "___");
    t2.join();
    }
    /*for(int i = 0; i<20000; i++){
        myString+="ABC";
        myString+="___";

    }*/
    cout<<myString;
    return 0
}