PC_DOPRIO
rv = priocntl(idtype, id, PC_DOPRIO, &pcprio);
if (priocntl(idtype, id, PC_DOPRIO, &pcprio) == 0)
if (priocntl(P_LWPID, P_MYID, PC_DOPRIO, &pcprio) == 0)
case PC_DOPRIO: