What are the differences between std::atomic and std::mutex in C++?

What are the differences between std::atomic and std::mutex in C++?

std::atomic provides lock-free atomic operations, while std::mutex is used for locking to protect shared resources.

When should I use std::atomic instead of std::mutex?

Use std::atomic for simple data types where you need fast, lock-free access. Use std::mutex for complex data structures.

Can you give an example of when std::mutex is necessary?

Sure! If you have a shared data structure like a linked list that multiple threads modify, std::mutex is necessary to prevent data races.

Are there performance implications when using std::mutex?

Yes, std::mutex can introduce overhead due to locking and unlocking, which can lead to contention and reduced performance.