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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | EXAMPLES | SEE ALSO | COLOPHON |
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pthread_...hedpolicy(3) Library Functions Manual pthread_...hedpolicy(3)
pthread_attr_setschedpolicy, pthread_attr_getschedpolicy - set/get
scheduling policy attribute in thread attributes object
POSIX threads library (libpthread, -lpthread)
#include <pthread.h>
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
int pthread_attr_getschedpolicy(const pthread_attr_t *restrict attr,
int *restrict policy);
The pthread_attr_setschedpolicy() function sets the scheduling
policy attribute of the thread attributes object referred to by
attr to the value specified in policy. This attribute determines
the scheduling policy of a thread created using the thread
attributes object attr.
The supported values for policy are SCHED_FIFO, SCHED_RR, and
SCHED_OTHER, with the semantics described in sched(7).
The pthread_attr_getschedpolicy() returns the scheduling policy
attribute of the thread attributes object attr in the buffer
pointed to by policy.
In order for the policy setting made by
pthread_attr_setschedpolicy() to have effect when calling
pthread_create(3), the caller must use
pthread_attr_setinheritsched(3) to set the inherit-scheduler
attribute of the attributes object attr to PTHREAD_EXPLICIT_SCHED.
On success, these functions return 0; on error, they return a
nonzero error number.
pthread_attr_setschedpolicy() can fail with the following error:
EINVAL Invalid value in policy.
POSIX.1 also documents an optional ENOTSUP error ("attempt was
made to set the attribute to an unsupported value") for
pthread_attr_setschedpolicy().
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ pthread_attr_setschedpolicy(), │ Thread safety │ MT-Safe │
│ pthread_attr_getschedpolicy() │ │ │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
glibc 2.0. POSIX.1-2001.
See pthread_setschedparam(3).
pthread_attr_init(3), pthread_attr_setinheritsched(3),
pthread_attr_setschedparam(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⟩.
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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-
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man-pages@man7.org
Linux man-pages 6.15 2025-05-17 pthread_...hedpolicy(3)
Pages that refer to this page: pthread_attr_init(3), pthread_attr_setinheritsched(3), pthread_attr_setschedparam(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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