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pthread_attr_setschedpolicy(3) — Linux manual page

NAME \|LIBRARY \|SYNOPSIS \|DESCRIPTION \|RETURN VALUE \|ERRORS \|ATTRIBUTES \|STANDARDS \|HISTORY \|EXAMPLES \|SEE ALSO \|COLOPHON

pthread_...hedpolicy(3)  Library Functions Manualpthread_...hedpolicy(3)

NAME top

       pthread_attr_setschedpolicy, pthread_attr_getschedpolicy - set/get       scheduling policy attribute in thread attributes object

LIBRARY top

       POSIX threads library (libpthread,-lpthread)

SYNOPSIS top

#include <pthread.h>int pthread_attr_setschedpolicy(pthread_attr_t *attr, intpolicy);int pthread_attr_getschedpolicy(const pthread_attr_t *restrictattr,int *restrictpolicy);

DESCRIPTION top

       Thepthread_attr_setschedpolicy() function sets the scheduling       policy attribute of the thread attributes object referred to byattr to the value specified inpolicy.  This attribute determines       the scheduling policy of a thread created using the thread       attributes objectattr.       The supported values forpolicy areSCHED_FIFO,SCHED_RR, andSCHED_OTHER, with the semantics described insched(7).       Thepthread_attr_getschedpolicy() returns the scheduling policy       attribute of the thread attributes objectattr in the buffer       pointed to bypolicy.       In order for the policy setting made bypthread_attr_setschedpolicy() to have effect when callingpthread_create(3), the caller must usepthread_attr_setinheritsched(3) to set the inherit-scheduler       attribute of the attributes objectattr toPTHREAD_EXPLICIT_SCHED.

RETURN VALUE top

       On success, these functions return 0; on error, they return a       nonzero error number.

ERRORS top

pthread_attr_setschedpolicy() can fail with the following error:EINVALInvalid value inpolicy.       POSIX.1 also documents an optionalENOTSUPerror ("attempt was       made to set the attribute to an unsupported value") forpthread_attr_setschedpolicy().

ATTRIBUTES top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │pthread_attr_setschedpolicy(),       │ Thread safety │ MT-Safe │       │pthread_attr_getschedpolicy()        │               │         │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

       POSIX.1-2008.

HISTORY top

       glibc 2.0.  POSIX.1-2001.

EXAMPLES top

       Seepthread_setschedparam(3).

COLOPHON top

       This page is part of theman-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 isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17pthread_...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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