std::thread不提供獲取當前線程的系統id的方法,僅可以獲取當前的線程id,但是我們可以通過建立索引表的方式來實現
1 std::mutex m; 2 std::map<std::thread::id, pid_t> threads; 3 void add_tid_mapping() 4 { 5 std::lock_guard<std::mutex> l(m); 6 threads[std::this_thread::get_id()] = syscall(SYS_gettid); 7 } 8 void wrap(void (*f)()) 9 { 10 add_tid_mapping(); 11 f(); 12 }
而后用其創建線程
1 std::thread t1(&wrap, &SayHello);
然后用如下方式獲取線程id
1 pid_t tid = 0; 2 while (tid == 0) 3 { 4 std::lock_guard<std::mutex> l(m); 5 if (threads.count(t1.get_id())) 6 tid = threads[t1.get_id()]; 7 }
轉自:https://stackoverflow.com/questions/15708983/how-can-you-get-the-linux-thread-id-of-a-stdthread