What are some examples of thread synchronization in C++?

What are some examples of thread synchronization in C++?

In C++, thread synchronization can be achieved using various mechanisms like mutexes, condition variables, and semaphores. Would you like to know more about a specific one?

Can you explain how mutexes work?

Sure! A mutex (mutual exclusion) is a synchronization primitive that prevents multiple threads from accessing a shared resource simultaneously. You lock the mutex before accessing the resource and unlock it afterward.

What about condition variables?

Condition variables are used to block a thread until a particular condition is met. They work with mutexes to allow threads to wait for certain conditions to be true before proceeding.

Can you give me a code example of using a mutex?

Absolutely! Here's a simple example:

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

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

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

Thanks! That was really helpful.