C++获取线程标识符id（线程号）

头文件：<thread>

方法1：获取指定线程的线程id     std::thread::id

方法2：获取当前线程的线程id     std::this_thread::get_id()

案例解析：

void foo()

{

    while (1) {

        std::cout << "std::this_thread::get_id is : " << std::this_thread::get_id() << std::endl;

        sleep(1);

    }

}

int main()

{

    std::thread first(foo);     // thread first

    std::thread second(foo);    // thread second

    std::cout << "std::thread::id is : " << first.get_id() << std::endl;

    first.join();               // pauses until first finishes

    second.join();              // pauses until second finishes

    return 0;

}

结果输出：

[root@localhost]# g++ main.cpp -o main -lpthread
[root@localhost]# ./main
std::thread::id is : 140445889021696
std::this_thread::get_id is : 140445889021696
std::this_thread::get_id is : 140445880628992
std::this_thread::get_id is : 140445889021696
std::this_thread::get_id is : 140445880628992
std::this_thread::get_id is : 140445889021696
std::this_thread::get_id is : 140445880628992
^C
[root@localhost]#