pthread_attr_setschedpolicy - Online Linux Manual Page

Section : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

NAME

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

LIBRARY

POSIX threads library

(

libpthread

−lpthread

)

SYNOPSIS

#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

);

DESCRIPTION

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

RETURN VALUE

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

ERRORS

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(

)

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
pthread_attr_setschedpolicy(), pthread_attr_getschedpolicy()	Thread safety	MT-Safe

STANDARDS

POSIX.1-2001, POSIX.1-2008.

EXAMPLES

See pthread_setschedparam(3).