What is std::recursive_mutex in C++11?

Can you explain what std::recursive_mutex is in C++11?

Sure! std::recursive_mutex is a synchronization primitive that allows multiple threads to lock the same mutex multiple times without causing a deadlock.

How does it differ from a regular mutex?

A regular mutex allows only one thread to lock it at a time, while std::recursive_mutex allows the same thread to lock it multiple times.

When should I use std::recursive_mutex?

You should use std::recursive_mutex when you have a situation where a thread needs to acquire the same lock multiple times, such as in recursive function calls.

Are there any performance considerations?

Yes, std::recursive_mutex can be slower than a regular mutex due to the overhead of keeping track of the lock count and the owning thread.