What is the difference between mutex and semaphores?

What is the difference between mutex and semaphores?

Mutexes and semaphores are both synchronization primitives used in concurrent programming. A mutex allows only one thread to access a resource at a time, while semaphores can allow multiple threads to access a resource up to a certain limit.

Can you give an example of when to use a mutex?

Sure! Use a mutex when you have a shared resource, like a variable, that must not be accessed by more than one thread at a time to prevent data corruption.

What about semaphores? When should I use them?

Semaphores are useful when you want to control access to a resource pool, like a fixed number of connections to a database. They can allow multiple threads to access the resource simultaneously, up to the limit set by the semaphore.

Are there any downsides to using mutexes or semaphores?

Yes, both can lead to issues like deadlocks if not managed properly. Mutexes can cause threads to wait indefinitely if one thread holds a mutex while waiting for another, and semaphores can lead to resource starvation if not carefully implemented.