1SCHED_YIELD(3P)            POSIX Programmer's Manual           SCHED_YIELD(3P)
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PROLOG

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

12       sched_yield — yield the processor
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SYNOPSIS

15       #include <sched.h>
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17       int sched_yield(void);
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DESCRIPTION

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

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

30       No errors are defined.
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32       The following sections are informative.
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EXAMPLES

35       None.
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APPLICATION USAGE

38       The conceptual model for scheduling semantics in POSIX.1‐2008 defines a
39       set of thread lists. This set of thread lists is always present regard‐
40       less of the scheduling options supported by the  system.  On  a  system
41       where the Process Scheduling option is not supported, portable applica‐
42       tions should not make any assumptions regarding  whether  threads  from
43       other processes will be on the same thread list.
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RATIONALE

46       None.
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FUTURE DIRECTIONS

49       None.
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SEE ALSO

52       The Base Definitions volume of POSIX.1‐2017, <sched.h>
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55       Portions  of  this text are reprinted and reproduced in electronic form
56       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
57       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
58       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
59       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
60       event of any discrepancy between this version and the original IEEE and
61       The  Open Group Standard, the original IEEE and The Open Group Standard
62       is the referee document. The original Standard can be  obtained  online
63       at http://www.opengroup.org/unix/online.html .
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65       Any  typographical  or  formatting  errors that appear in this page are
66       most likely to have been introduced during the conversion of the source
67       files  to  man page format. To report such errors, see https://www.ker‐
68       nel.org/doc/man-pages/reporting_bugs.html .
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72IEEE/The Open Group                  2017                      SCHED_YIELD(3P)
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