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std::unique_lock<Mutex>:: swap

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std::unique_lock
void swap ( unique_lock & other ) noexcept ;
(自 C++11 起)

交换锁对象的内部状态。

目录

参数

其他 - 用于交换状态的锁

返回值

(无)

示例

运行此代码 
#include <iostream>
#include <mutex>
int main()
{
    std::mutex mtx1;
    std::unique_lock<std::mutex> guard1(mtx1);
    std::unique_lock<std::mutex> guard2;
    guard2.swap(guard1);
    if (!guard1 && guard2)
        std::cout << "swapped success\n";
    return 0;
}

输出： 

swapped success

参见

(C++11)
特化 std::swap 算法
(函数模板)