workerfn
ret = pthread_create(&w->thread, attrp, workerfn,
ret = pthread_create(&w->thread, attrp, workerfn,
ret = pthread_create(&worker[i].thread, &thread_attr, workerfn,
if (pthread_create(&w[i].thread, &thread_attr, workerfn, &worker[i])) {
if (pthread_create(&w[i], &thread_attr, workerfn, NULL)) {
if (pthread_create(&w[i], &thread_attr, workerfn, NULL)) {