Section: POSIX Programmer's Manual (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.
--- get and set the inheritsched attribute
int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
int *restrict inheritsched);
int pthread_attr_setinheritsched(pthread_attr_t *attr,
functions, respectively, shall get and set the
attribute in the
When the attributes objects are used by
attribute determines how the other scheduling attributes of the created
thread shall be set.
The supported values of
Specifies that the thread scheduling attributes shall be inherited from
the creating thread, and the scheduling attributes in this
argument shall be ignored.
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
The following thread scheduling attributes defined by POSIX.1-2008 are
affected by the
attribute: scheduling policy (schedpolicy),
scheduling parameters (schedparam),
and scheduling contention scope (contentionscope).
The behavior is undefined if the value specified by the
does not refer to an initialized thread attributes object.
If successful, the
functions shall return zero; otherwise, an error number shall be
returned to indicate the error.
function shall fail if:
An attempt was made to set the attribute to an unsupported value.
function may fail if:
The value of
is not valid.
These functions shall not return an error code of
The following sections are informative.
After these attributes have been set, a thread can be created with the
specified attributes using
Using these routines does not affect the current running thread.
Section 2.9.4, Thread Scheduling
for further details on thread scheduling attributes and their default
If an implementation detects that the value specified by the
does not refer to an initialized thread attributes object, it is
recommended that the function should fail and report an
The Base Definitions volume of POSIX.1-2017,
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
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