NAME
pthread_attr_getschedparam —
get and
set scheduling attributes
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_attr_getschedparam(
const
pthread_attr_t * restrict attr,
struct sched_param * restrict
param);
int
pthread_attr_setschedparam(
pthread_attr_t
*attr,
const struct
sched_param *param);
int
pthread_attr_getschedpolicy(
const
pthread_attr_t * restrict attr,
int * restrict policy);
int
pthread_attr_setschedpolicy(
pthread_attr_t
*attr,
int policy);
DESCRIPTION
The
pthread_attr_getschedparam() and
pthread_attr_setschedparam() functions obtain and set the
scheduling parameter attribute in the
attr object. The
sched_param structure is defined in
<sched.h>. At minimum this structure
contains only a single member,
sched_priority. Refer to
pthread_schedparam(3)
and
sched(3) for additional
details.
The
pthread_attr_getschedpolicy() and
pthread_attr_setschedpolicy() functions get and set the
scheduling policy attribute,
policy, in the
attr object. The supported values of
policy are the same ones listed in
pthread_schedparam(3).
RETURN VALUES
If successful, all described functions return 0. Otherwise, an error number is
returned to indicate the error.
ERRORS
The
pthread_attr_getschedparam() function may fail if:
-
-
- [
EINVAL
]
- An invalid parameter was specified.
The
pthread_attr_setschedparam() function may fail if:
-
-
- [
EINVAL
]
- An invalid parameter was specified.
-
-
- [
ENOMEM
]
- There was insufficient memory.
The
pthread_attr_setschedpolicy() function may fail if:
-
-
- [
ENOMEM
]
- There was insufficient memory.
-
-
- [
ENOTSUP
]
- An unsupported policy was
specified.
No errors are defined for
pthread_attr_getschedpolicy().
SEE ALSO
pthread_attr(3),
pthread_schedparam(3),
sched(3)
STANDARDS
These functions conform to
IEEE Std 1003.1-2008
(“POSIX.1”).