NAME
pthread_attr_getschedparam,
pthread_attr_setschedparam,
pthread_attr_getschedpolicy,
pthread_attr_setschedpolicy —
get and set scheduling
attributes
LIBRARY
library “libpthread”
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
Thepthread_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
STANDARDS
These functions conform to IEEE Std 1003.1-2008 (“POSIX.1”).