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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 .

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