pthread_key_create = 0

pthread_setspecific = 0

pthread_getspecific = 123

valid pthread_setspecific for value NULL = 0

pthread_getspecific = 0

pthread_getspecific after key recreate = 0

pthread_key_delete = 0

pthread_key_delete repeated = 28

pthread_setspecific for value NULL = 28

pthread_key_delete just after created = 0