redhat man page for sched_yield

SCHED_YIELD(2)						     Linux Programmer's Manual						    SCHED_YIELD(2)

NAME
       sched_yield - yield the processor

SYNOPSIS
       #include <sched.h>

       int sched_yield(void);

DESCRIPTION
       A  process  can relinquish the processor voluntarily without blocking by calling sched_yield.  The process will then be moved to the end of
       the queue for its static priority and a new process gets to run.

       Note: If the current process is the only process in the highest priority list at that time, this process will continue to run after a  call
       to sched_yield.

       POSIX systems on which sched_yield is available define _POSIX_PRIORITY_SCHEDULING in <unistd.h>.

RETURN VALUE
       On success, sched_yield returns 0.  On error, -1 is returned, and errno is set appropriately.

CONFORMING TO
       POSIX.1b (formerly POSIX.4)

SEE ALSO
       sched_setscheduler(2) for a description of Linux scheduling.

       Programming for the real world - POSIX.4 by Bill O. Gallmeister, O'Reilly & Associates, Inc., ISBN 1-56592-074-0
       IEEE Std 1003.1b-1993 (POSIX.1b standard)
       ISO/IEC 9945-1:1996

Linux 1.3.81							    1996-04-10							    SCHED_YIELD(2)