1PTHREAD_ATTR_GETINHERITSCHEDP(O3SPI)X Programmer's MPaTnHuRaElAD_ATTR_GETINHERITSCHED(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       pthread_attr_getinheritsched, pthread_attr_setinheritsched  -  get  and
13       set the inheritsched attribute (REALTIME THREADS)
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SYNOPSIS

16       #include <pthread.h>
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18       int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
19              int *restrict inheritsched);
20       int pthread_attr_setinheritsched(pthread_attr_t *attr,
21              int inheritsched);
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DESCRIPTION

25       The  pthread_attr_getinheritsched(), and pthread_attr_setinheritsched()
26       functions, respectively, shall get and set the  inheritsched  attribute
27       in the attr argument.
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29       When  the  attributes  objects are used by pthread_create(), the inher‐
30       itsched attribute determines how the other scheduling attributes of the
31       created thread shall be set.
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33       PTHREAD_INHERIT_SCHED
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35              Specifies  that the thread scheduling attributes shall be inher‐
36              ited from the creating thread, and the scheduling attributes  in
37              this attr argument shall be ignored.
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39       PTHREAD_EXPLICIT_SCHED
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41              Specifies  that the thread scheduling attributes shall be set to
42              the corresponding values from this attributes object.
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45       The  symbols  PTHREAD_INHERIT_SCHED  and   PTHREAD_EXPLICIT_SCHED   are
46       defined in the <pthread.h> header.
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48       The    following    thread    scheduling    attributes    defined    by
49       IEEE Std 1003.1-2001 are affected by the inheritsched attribute: sched‐
50       uling  policy  ( schedpolicy), scheduling parameters ( schedparam), and
51       scheduling contention scope ( contentionscope).
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RETURN VALUE

54       If successful, the pthread_attr_getinheritsched() and pthread_attr_set‐
55       inheritsched()  functions shall return zero; otherwise, an error number
56       shall be returned to indicate the error.
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ERRORS

59       The pthread_attr_setinheritsched() function may fail if:
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61       EINVAL The value of inheritsched is not valid.
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63       ENOTSUP
64              An attempt was made to  set  the  attribute  to  an  unsupported
65              value.
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68       These functions shall not return an error code of [EINTR].
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70       The following sections are informative.
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EXAMPLES

73       None.
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APPLICATION USAGE

76       After  these attributes have been set, a thread can be created with the
77       specified attributes using pthread_create(). Using these routines  does
78       not affect the current running thread.
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RATIONALE

81       None.
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FUTURE DIRECTIONS

84       None.
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SEE ALSO

87       pthread_attr_destroy(), pthread_attr_getscope(), pthread_attr_getsched‐
88       policy(), pthread_attr_getschedparam(), pthread_create(), the Base Def‐
89       initions volume of IEEE Std 1003.1-2001, <pthread.h>, <sched.h>
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92       Portions  of  this text are reprinted and reproduced in electronic form
93       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
94       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
95       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
96       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
97       event of any discrepancy between this version and the original IEEE and
98       The  Open Group Standard, the original IEEE and The Open Group Standard
99       is the referee document. The original Standard can be  obtained  online
100       at http://www.opengroup.org/unix/online.html .
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104IEEE/The Open Group                  2003     PTHREAD_ATTR_GETINHERITSCHED(3P)
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