Advanced C++ Programming Cookbook

std::timed_mutex

Finally, we have not dealt with the scenario where a thread that acquired a mutex crashed. In this scenario, any thread that attempts to acquire the same mutex would enter a deadlock state as the thread that crashed never gets a chance to call unlock(). One way to prevent this issue is to use std::timed_mutex.

For example, consider the following code:

#include <mutex>#include <thread>#include <iostream>std::timed_mutex m{};void foo(){    using namespace std::chrono;    if (m.try_lock_for(seconds(1))) {        std::cout << "lock acquired\n";    }    else {        std::cout << "lock failed\n";    }}int main(void){    std::thread t1{foo};    std::thread t2{foo};    t1.join();    t2.join();    return 0;}

When this is executed, we get the following:

In the preceding example, ...