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PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.


NAME
       sched_yield — yield the processor


SYNOPSIS
       #include <sched.h>

       int sched_yield(void);


DESCRIPTION
       The  sched_yield()  function  shall  force  the running thread to relinquish the processor
       until it again becomes the head of its thread list. It takes no arguments.


RETURN VALUE
       The sched_yield() function shall return 0 if  it  completes  successfully;  otherwise,  it
       shall return a value of -1 and set errno to indicate the error.


ERRORS
       No errors are defined.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       The  conceptual  model  for  scheduling  semantics in POSIX.1‐2008 defines a set of thread
       lists. This set of thread lists is always present regardless  of  the  scheduling  options
       supported by the system. On a system where the Process Scheduling option is not supported,
       portable applications should not make any assumptions regarding whether threads from other
       processes will be on the same thread list.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       The Base Definitions volume of POSIX.1‐2017, <sched.h>


COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1-2017, Standard for Information Technology -- Portable  Operating  System  Interface
       (POSIX),  The  Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any  typographical  or  formatting errors that appear in this page are most likely to have
       been introduced during the conversion of the source files to man page  format.  To  report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .