What is the difference between shared_mutex and unique_lock in C++?

What is the difference between shared_mutex and unique_lock in C++?

In C++, a shared_mutex allows multiple threads to read data simultaneously, while a unique_lock allows only one thread to write.

Can you give an example of when to use each?

Use shared_mutex when you have multiple readers and occasional writers. Use unique_lock when you need exclusive access for writing.

What are the performance implications of using shared_mutex?

Using shared_mutex can improve performance in read-heavy scenarios, but it may introduce overhead due to managing multiple readers.

Are there any drawbacks to using unique_lock?

Yes, unique_lock can lead to contention if many threads are trying to write simultaneously, potentially causing delays.