Advanced Synchronization Primitives

Initialize, use, and destroy read-write locks (pthread_rwlock) for read-heavy workloads.

Apply a read-write lock to a data structure to improve concurrency over a standard mutex.

Initialize and use unnamed semaphores (sem_t) for resource counting.

Implement a simple resource pool protected by a semaphore.

Synchronize the start of a multi-stage computation using a pthread_barrier.

Implement a critical section using a pthread_spinlock and describe its use case.

Identify the appropriate synchronization primitive (mutex, rwlock, semaphore, barrier) for a given concurrency problem.