opensolaris man page for yield

yield(2)							   System Calls 							  yield(2)

NAME
       yield - yield execution to another lightweight process

SYNOPSIS
       #include <unistd.h>

       void yield(void);

DESCRIPTION
       The yield() function causes the current lightweight process to yield its execution in favor of another lightweight process with the same or
       greater priority.

SEE ALSO
       thr_yield(3C)

SunOS 5.11							    20 Jul 1993 							  yield(2)