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PTHREAD_ATTR_GETINHERITSCHED(3P)Programmer'sPManual_ATTR_GETINHERITSCHED(3P)
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.
pthread_attr_getinheritsched, pthread_attr_setinheritsched — get and
set the inheritsched attribute (REALTIME THREADS)
#include <pthread.h>
int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
int *restrict inheritsched);
int pthread_attr_setinheritsched(pthread_attr_t *attr,
int inheritsched);
The pthread_attr_getinheritsched() and pthread_attr_setinheritsched()
functions, respectively, shall get and set the inheritsched attribute
in the attr argument.
When the attributes objects are used by pthread_create(), the
inheritsched attribute determines how the other scheduling attributes
of the created thread shall be set.
The supported values of inheritsched shall be:
PTHREAD_INHERIT_SCHED
Specifies that the thread scheduling attributes shall be
inherited from the creating thread, and the scheduling
attributes in this attr argument shall be ignored.
PTHREAD_EXPLICIT_SCHED
Specifies that the thread scheduling attributes shall be set to
the corresponding values from this attributes object.
The symbols PTHREAD_INHERIT_SCHED and PTHREAD_EXPLICIT_SCHED are
defined in the <pthread.h> header.
The following thread scheduling attributes defined by POSIX.1‐2008
are affected by the inheritsched attribute: scheduling policy
(schedpolicy), scheduling parameters (schedparam), and scheduling
contention scope (contentionscope).
The behavior is undefined if the value specified by the attr argument
to pthread_attr_getinheritsched() or pthread_attr_setinheritsched()
does not refer to an initialized thread attributes object.
If successful, the pthread_attr_getinheritsched() and
pthread_attr_setinheritsched() functions shall return zero;
otherwise, an error number shall be returned to indicate the error.
The pthread_attr_setinheritsched() function shall fail if:
ENOTSUP
An attempt was made to set the attribute to an unsupported
value.
The pthread_attr_setinheritsched() function may fail if:
EINVAL The value of inheritsched is not valid.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
After these attributes have been set, a thread can be created with
the specified attributes using pthread_create(). Using these
routines does not affect the current running thread.
See Section 2.9.4, Thread Scheduling for further details on thread
scheduling attributes and their default settings.
If an implementation detects that the value specified by the attr
argument to pthread_attr_getinheritsched() or
pthread_attr_setinheritsched() does not refer to an initialized
thread attributes object, it is recommended that the function should
fail and report an [EINVAL] error.
None.
pthread_attr_destroy(3p), pthread_attr_getscope(3p),
pthread_attr_getschedpolicy(3p), pthread_attr_getschedparam(3p),
pthread_create(3p)
The Base Definitions volume of POSIX.1‐2008, pthread.h(0p),
sched.h(0p)
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/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 .
IEEE/The Open Group 2013 PTHREAD_ATTR_GETINHERITSCHED(3P)
Pages that refer to this page: pthread.h(0p), pthread_attr_getschedparam(3p), pthread_attr_getschedpolicy(3p), pthread_attr_getscope(3p), pthread_attr_setinheritsched(3p)