The pthread_attr_getschedpolicy() and
pthread_attr_setschedpolicy() functions, respectively, shall get and
set the schedpolicy attribute in the attr argument.
The supported values of policy shall include SCHED_FIFO, SCHED_RR, and
SCHED_OTHER, which are defined in the <sched.h> header. When
threads executing with the scheduling policy SCHED_FIFO, SCHED_RR, or
SCHED_SPORADIC are waiting on a mutex, they shall acquire the mutex in
priority order when the mutex is unlocked.
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html