Concurrency_pthread_rwlock_t.swift

// Initialization of lock, pthread_rwlock_t is a value type and must be declared as var in order to refer it later. Make sure not to copy it.
var lock = pthread_rwlock_t()
pthread_rwlock_init(&lock, nil)

// Protecting read section:
pthread_rwlock_rdlock(&lock)
// Read shared resource
pthread_rwlock_unlock(&lock)

// Protecting write section:
pthread_rwlock_wrlock(&lock)
// Write shared resource
pthread_rwlock_unlock(&lock)

// Clean up
pthread_rwlock_destroy(&lock)