pthread_a...chedpolicy(3) Library Functions Manual pthread_a...chedpolicy(3)
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 at-
tribute 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_setsched-
policy().
ATTRIBUTES
For an explanation of the terms used in this section, see attrib-
utes(7).
┌───────────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────────────────┼───────────────┼─────────┤
│ pthread_attr_setschedpolicy(), │ Thread safety │ MT-Safe │
│ pthread_attr_getschedpolicy() │ │ │
└───────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
POSIX.1-2008.
HISTORY
glibc 2.0. POSIX.1-2001.
EXAMPLES
See pthread_setschedparam(3).
SEE ALSO
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)
Linux man-pages 6.7 2023-10-31 pthread_a...chedpolicy(3)
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