What is the difference between std::lock and std::unique_lock in C++?

What is the difference between std::lock and std::unique_lock in C++?

std::lock is used to lock multiple mutexes at once to avoid deadlocks, while std::unique_lock provides more flexibility.

Can you explain how std::unique_lock works?

std::unique_lock is a smart lock that manages a mutex's lifetime, allowing for deferred locking and unlocking.

When should I use std::lock instead of std::unique_lock?

Use std::lock when you need to lock multiple mutexes simultaneously. Use std::unique_lock for single mutex management.

Are there any performance differences between the two?

Yes, std::lock can be more efficient for multiple mutexes, while std::unique_lock has overhead due to its flexibility.