# std::thread::swap

< cpp‎ | thread‎ | thread

void swap( std::thread& other ) noexcept; |  | (C++11 起)

交换二个 thread 对象的底层柄。

### 参数

other | - | 要与之交换的 thread

### 返回值

（无）

### 示例

    #include <iostream>
    #include <thread>
    #include <chrono>

    void foo()
    {
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    void bar()
    {
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    int main()
    {
        std::thread t1(foo);
        std::thread t2(bar);

        std::cout << "thread 1 id: " << t1.get_id() << '\n'
                  << "thread 2 id: " << t2.get_id() << '\n';

        std::swap(t1, t2);

        std::cout << "after std::swap(t1, t2):" << '\n'
                  << "thread 1 id: " << t1.get_id() << '\n'
                  << "thread 2 id: " << t2.get_id() << '\n';

        t1.swap(t2);

        std::cout << "after t1.swap(t2):" << '\n'
                  << "thread 1 id: " << t1.get_id() << '\n'
                  << "thread 2 id: " << t2.get_id() << '\n';

        t1.join();
        t2.join();
    }

可能的输出：

    thread 1 id: 140185268262656
    thread 2 id: 140185259869952
    after std::swap(t1, t2):
    thread 1 id: 140185259869952
    thread 2 id: 140185268262656
    after t1.swap(t2):
    thread 1 id: 140185268262656
    thread 2 id: 140185259869952

### 参阅

std::swap(std::thread) (C++11) | 特化 std::swap 算法 (函数)