What is the C++ std::atomic library?

Can you explain what the C++ std::atomic library is used for?

The C++ std::atomic library provides atomic operations for variables, ensuring safe access in multithreaded environments.

How does std::atomic differ from regular variables?

Unlike regular variables, std::atomic ensures that operations on the variable are atomic, preventing data races.

Can you give me an example of using std::atomic?

Sure! Here's a simple example:

#include <atomic>
#include <iostream>

std::atomic<int> counter(0);

void increment() {
    counter++;
}

int main() {
    increment();
    std::cout << "Counter: " << counter.load() << std::endl;
    return 0;
}

This code safely increments a counter in a multithreaded context.

Are there any performance considerations when using std::atomic?

Yes, while std::atomic provides thread safety, it can introduce overhead compared to non-atomic operations, so use it judiciously.