Mutex vs Semaphore: Which One Should I Use?

What's the difference between a mutex and a semaphore?

A mutex is a locking mechanism that allows only one thread to access a resource at a time, while a semaphore can allow multiple threads to access a resource, up to a defined limit.

When should I use a mutex instead of a semaphore?

Use a mutex when you need exclusive access to a resource. If you need to control access to a pool of resources, a semaphore is more appropriate.

Can you give me an example of when to use a semaphore?

Sure! If you have a fixed number of database connections and want to limit the number of concurrent connections, a semaphore can manage that.

Are there any downsides to using semaphores?

Yes, semaphores can lead to complexity and potential deadlocks if not managed carefully, especially in large systems.