How do I use std::mutex in C++11?

How do I use std::mutex in C++11?

To use std::mutex in C++11, you first need to include the <mutex> header. Then, you can create a mutex object.

Can you show me a simple example of using std::mutex?

Sure! Here's a basic example:

#include <iostream>
#include <thread>
#include <mutex>

std::mutex mtx;

void printNumbers(int id) {
    mtx.lock(); // Lock the mutex
    for (int i = 0; i < 5; ++i) {
        std::cout << "Thread " << id << ": " << i << std::endl;
    }
    mtx.unlock(); // Unlock the mutex
}

int main() {
    std::thread t1(printNumbers, 1);
    std::thread t2(printNumbers, 2);
    t1.join();
    t2.join();
    return 0;
}

What happens if I forget to unlock the mutex?

If you forget to unlock the mutex, it can lead to a deadlock situation where other threads are unable to acquire the lock, causing your program to hang.

Are there any alternatives to std::mutex?

Yes, alternatives include std::shared_mutex for shared access and std::recursive_mutex for recursive locking.