{
{    The purpose of this request is to assign a relative priority to a task.
{ The relative priority of a task is used in the task dispatching algorithms to
{ determine the order of execution of ready tasks.
{
{    The default relative priority of a task is 128.  The user should be aware
{ of the impact of the default.  Any tasks which have not set their relative
{ priority will run at a higher priority than tasks which have lowered their
{ priority below the default.  Also, any tasks which have set their priority
{ above the default will block other tasks from setting their relative priority
{ (assuming the task which has raised its priority above the default is CP
{ bound).
{
{       PMP$SET_RELATIVE_PRIORITY (relative_priority, status)
{
{ RELATIVE_PRIORITY: (input)  This parameter is the relative priority to be
{       assigned to the task.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITIONS:
{             pme$invalid_relative_priority
