What are some examples of C++ sync techniques?

Can you explain some synchronization techniques in C++?

Sure! In C++, synchronization techniques are used to manage access to shared resources. Common techniques include mutexes, condition variables, and atomic operations.

What is a mutex and how do I use it?

A mutex, or mutual exclusion, is a synchronization primitive that prevents multiple threads from accessing a resource simultaneously. You can use it by creating a std::mutex object and locking it with lock() before accessing the resource.

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

Certainly! Here's a simple example:

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

std::mutex mtx;
void print(int id) {
    mtx.lock();
    std::cout << "Thread " << id << " is running." << std::endl;
    mtx.unlock();
}

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

What are condition variables used for?

Condition variables are used to block a thread until a particular condition is met. They are often used in conjunction with mutexes to synchronize threads.