SCHED_YIELD(2) BSD System Calls Manual SCHED_YIELD(2)
sched_yield -- yield the processor
The sched_yield() function makes the current thread yield the processor
and be put at the end of its run queue without altering its priority.
Upon successful completion, the value 0 is returned; otherwise the
value -1 is returned and the global variable errno is set to indicate the
The sched_yield() function conforms to IEEE Std 1003.1-2008
The sched_yield() system call appeared in OpenBSD 4.2.
The effect of sched_yield() is only precisely defined for real-time
scheduling classes, none of which are currently supported by OpenBSD.
BSD November 14, 2014 BSD