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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | BUGS | EXAMPLES | SEE ALSO | COLOPHON |
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pthread_a...eritsched(3) Library Functions Manualpthread_a...eritsched(3)
pthread_attr_setinheritsched, pthread_attr_getinheritsched -
set/get inherit-scheduler attribute in thread attributes object
POSIX threads library (libpthread, -lpthread)
#include <pthread.h>
int pthread_attr_setinheritsched(pthread_attr_t *attr,
int inheritsched);
int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
int *restrict inheritsched);
The pthread_attr_setinheritsched() function sets the inherit-
scheduler attribute of the thread attributes object referred to by
attr to the value specified in inheritsched. The inherit-
scheduler attribute determines whether a thread created using the
thread attributes object attr will inherit its scheduling
attributes from the calling thread or whether it will take them
from attr.
The following scheduling attributes are affected by the inherit-
scheduler attribute: scheduling policy
(pthread_attr_setschedpolicy(3)), scheduling priority
(pthread_attr_setschedparam(3)), and contention scope
(pthread_attr_setscope(3)).
The following values may be specified in inheritsched:
PTHREAD_INHERIT_SCHED
Threads that are created using attr inherit scheduling
attributes from the creating thread; the scheduling
attributes in attr are ignored.
PTHREAD_EXPLICIT_SCHED
Threads that are created using attr take their scheduling
attributes from the values specified by the attributes
object.
The default setting of the inherit-scheduler attribute in a newly
initialized thread attributes object is PTHREAD_INHERIT_SCHED.
The pthread_attr_getinheritsched() returns the inherit-scheduler
attribute of the thread attributes object attr in the buffer
pointed to by inheritsched.
On success, these functions return 0; on error, they return a
nonzero error number.
pthread_attr_setinheritsched() can fail with the following error:
EINVAL Invalid value in inheritsched.
POSIX.1 also documents an optional ENOTSUP error ("attempt was
made to set the attribute to an unsupported value") for
pthread_attr_setinheritsched().
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ pthread_attr_setinheritsched(), │ Thread safety │ MT-Safe │
│ pthread_attr_getinheritsched() │ │ │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
glibc 2.0. POSIX.1-2001.
As at glibc 2.8, if a thread attributes object is initialized
using pthread_attr_init(3), then the scheduling policy of the
attributes object is set to SCHED_OTHER and the scheduling
priority is set to 0. However, if the inherit-scheduler attribute
is then set to PTHREAD_EXPLICIT_SCHED, then a thread created using
the attribute object wrongly inherits its scheduling attributes
from the creating thread. This bug does not occur if either the
scheduling policy or scheduling priority attribute is explicitly
set in the thread attributes object before calling
pthread_create(3).
See pthread_setschedparam(3).
pthread_attr_init(3), pthread_attr_setschedparam(3),
pthread_attr_setschedpolicy(3), pthread_attr_setscope(3),
pthread_create(3), pthread_setschedparam(3),
pthread_setschedprio(3), pthreads(7), sched(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 pthread_a...eritsched(3)
Pages that refer to this page: pthread_attr_init(3), pthread_attr_setschedparam(3), pthread_attr_setschedpolicy(3), pthread_attr_setscope(3), pthread_getattr_default_np(3), pthread_getattr_np(3), pthread_setschedparam(3), pthread_setschedprio(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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