C++11之超时锁timed_mutex-Toy模板网

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超时锁：用来记录线程加锁解锁等竞争锁的过程，多用于调试多线程时使用。

启动多个线程，然后，竞争一把超时锁，分别打印记录加锁成功的线程和失败的线程id:

std::timed_mutex tmtx;

void ThradFunc()
{
    while (true)
    {
    	//如果失敗，將睡眠100毫秒，否則搶占鎖成功
    	//相當於常規鎖mutex :: try_lock()失敗 + sleep()
        if(!tmtx.try_lock_for(std::chrono::milliseconds(100)))
        {
            std::cout << "thread_id = " << std::this_thread::get_id() << " try lock failed" << std::endl;
            continue;
        }
        std::cout << "thread_id = " << std::this_thread::get_id() << " try lock success" << std::endl;
        std::this_thread::sleep_for(std::chrono::milliseconds(200));
        tmtx.unlock();
        std::this_thread::sleep_for(std::chrono::milliseconds(1));
    } 
}

int main()
{
    for(int i = 0; i < 3; ++i)
    {
        std::thread t(ThradFunc);
        t.detach();
    }
    getchar();
    return 0;
}

打印结果：文章来源地址https://www.toymoban.com/news/detail-643124.html

thread_id = 140532499904256 try lock success
thread_id = 140532508296960 try lock failed
thread_id = 140532491511552 try lock failed
thread_id = 140532508296960 try lock success
thread_id = 140532491511552 try lock failed
thread_id = 140532491511552 try lock failed
thread_id = 140532499904256 try lock failed
thread_id = 140532491511552 try lock success
thread_id = 140532499904256 try lock failed
thread_id = 140532508296960 try lock failed
thread_id = 140532499904256 try lock failed
thread_id = 140532508296960 try lock success
thread_id = 140532499904256 try lock failed
thread_id = 140532491511552 try lock failed
thread_id = 140532499904256 try lock failed
thread_id = 140532491511552 try lock success
thread_id = 140532499904256 try lock failed
thread_id = 140532508296960 try lock failed
thread_id = 140532499904256 try lock failed
thread_id = 140532508296960 try lock success
thread_id = 140532499904256 try lock failed
thread_id = 140532491511552 try lock failed
thread_id = 140532499904256 try lock failed
thread_id = 140532491511552 try lock success
thread_id = 140532499904256 try lock failed
thread_id = 140532508296960 try lock failed
thread_id = 140532499904256 try lock failed