pthread_setaffinity_np
int pthread_setaffinity_np(pthread_t, size_t, const cpu_set_t *);
WR(stub_zero, pthread_setaffinity_np);
__strong_reference(_pthread_setaffinity_np, pthread_setaffinity_np);
error = pthread_setaffinity_np(pthread_self(),
pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset);
pthread_setaffinity_np(pthread_self(), sizeof(defset), &defset);