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.Dd July 7, 2010
.Dt PTHREAD_ATTR_GETSCHEDPARAM 3
.Os
.Sh NAME
.Nm pthread_attr_getschedparam ,
.Nm pthread_attr_setschedparam ,
.Nm pthread_attr_getschedpolicy ,
.Nm pthread_attr_setschedpolicy
.Nd get and set scheduling attributes
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_attr_getschedparam \
"const pthread_attr_t * restrict attr" "struct sched_param * restrict param"
.Ft int
.Fn pthread_attr_setschedparam \
"pthread_attr_t *attr" "const struct sched_param *param"
.Ft int
.Fn pthread_attr_getschedpolicy \
"const pthread_attr_t * restrict attr" "int * restrict policy"
.Ft int
.Fn pthread_attr_setschedpolicy "pthread_attr_t *attr" "int policy"
.Sh DESCRIPTION
The
.Fn pthread_attr_getschedparam
and
.Fn pthread_attr_setschedparam
functions obtain and set the scheduling parameter attribute in the
.Fa attr
object.
The
.Vt sched_param
structure is defined in
.In sched.h .
At minimum this structure contains only a single member,
.Vt sched_priority .
Refer to
.Xr pthread_schedparam 3
and
.Xr sched 3
for additional details.
.Pp
The
.Fn pthread_attr_getschedpolicy
and
.Fn pthread_attr_setschedpolicy
functions get and set the scheduling policy attribute,
.Fa policy ,
in the
.Fa attr
object.
The supported values of
.Fa policy
are the same ones listed in
.Xr pthread_schedparam 3 .
.Sh RETURN VALUES
If successful, all described functions return 0.
Otherwise, an error number is returned to indicate the error.
.Sh ERRORS
The
.Fn pthread_attr_getschedparam
function may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
An invalid parameter was specified.
.El
.Pp
The
.Fn pthread_attr_setschedparam
function may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
An invalid parameter was specified.
.It Bq Er ENOMEM
There was insufficient memory.
.El
.Pp
The
.Fn pthread_attr_setschedpolicy
function may fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
There was insufficient memory.
.It Bq Er ENOTSUP
An unsupported
.Fa policy
was specified.
.El
.Pp
No errors are defined for
.Fn pthread_attr_getschedpolicy .
.Sh SEE ALSO
.Xr pthread_attr 3 ,
.Xr pthread_schedparam 3 ,
.Xr sched 3
.Sh STANDARDS
These functions conform to
.St -p1003.1-2008 .