What are some common errors when using semaphores in C++?

What are some common errors when using semaphores in C++?

Some common errors include forgetting to initialize the semaphore, using the wrong semaphore type, and deadlocks.

Can you explain how to initialize a semaphore correctly?

To initialize a semaphore in C++, use sem_init(&sem, 0, initial_value); where initial_value is the starting count.

What is a deadlock and how can I avoid it?

A deadlock occurs when two or more threads are waiting for each other to release resources. To avoid it, ensure a consistent order of resource acquisition.

Are there any tools to help debug semaphore issues?

Yes, tools like Valgrind and ThreadSanitizer can help detect synchronization issues, including those related to semaphores.