What are the differences between condition variables and semaphores?

Can you explain the differences between condition variables and semaphores?

Sure! Condition variables and semaphores are both synchronization primitives used in concurrent programming, but they serve different purposes.

What is the main purpose of a condition variable?

A condition variable is used to block a thread until a particular condition is met, allowing threads to wait for certain events.

And what about semaphores?

Semaphores are used to control access to a shared resource by maintaining a count. They can signal when resources are available.

Can you give an example of when to use each?

Certainly! Use a condition variable when you need to wait for a specific condition, like a buffer being filled. Use a semaphore to limit access to a resource, like a pool of database connections.