pthread_attr_setschedpolicy
Section: C Library Functions (3)
Updated: 202-0-17
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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 inheri-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 | M-Safe
|
STANDARDS
POSIX.-2008.
HISTORY
glibc 2.0.
POSIX.-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)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- EXAMPLES
-
- SEE ALSO
-
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