pthread_attr_destroy()
       pthread_attr_setdetachstate()
       pthread_attr_setguardsize()
       pthread_attr_setinheritsched()
       pthread_attr_setschedparam()
       pthread_attr_setschedpolicy()
       pthread_attr_setscope()
       pthread_attr_setstackaddr()
       pthread_attr_setstacksize()
       pthread_create()