pthread_barrier_init
int pthread_barrier_init(pthread_barrier_t *,
PROTO_STD_DEPRECATED(pthread_barrier_init);
CHECKr(pthread_barrier_init(&b, &attr, 10));
error = pthread_barrier_init(&thread_barrier, NULL, threads + 1);
ret = pthread_barrier_init(&vm_pause_barrier, NULL, vmc->vmc_ncpus + 1);