setattr (2), pthread_setschedparam (3), or pthread_setschedprio (3) changes the priority of the running ... policy) using any mechanism other than pthread_setschedprio (3) should r…attr_setscope () pthread_getschedparam () pthread_setschedparam () pthread_setschedprio () TSH - _POSIX_THREAD_PROCESS_SHARED - _SC_THREAD