c++ thread id

来源：https://stackoverflow.com/questions/7432100/how-to-get-integer-thread-id-in-c11

std::hash<std::thread::id>{}(std::this_thread::get_id())

printf("%lu", std::hash<std::thread::id>{}(std::this_thread::get_id()))

int id = 0;
for(auto& work_item : all_work) {
    std::async(std::launch::async, [id,&work_item]{ work_item(id); });
    ++id;
}

std::stringstream ss;
ss << std::this_thread::get_id();
uint64_t id = std::stoull(ss.str());