Enum RtPolicy 

pub enum RtPolicy {
    Disabled,
    AllowRealtime,
}

Whether this process may ask the OS for real-time scheduling.

Resolved from RT_PRIORITY_ENV exactly once per process by RtPolicy::current. It is a parameter of apply_to_current_thread_under rather than a check buried inside the syscall wrapper, so “switch off ⟹ no scheduler call” is a property of the call graph and not of a runtime branch some future caller can skip.

Variants

Disabled

Never touch the OS scheduler.

AllowRealtime

Best-effort SCHED_FIFO, falling back to default scheduling.

Implementations

impl RtPolicy

pub fn from_env_value(raw: Option<&str>) -> RtPolicy

Parse a raw switch value (None = unset ⇒ DEFAULT_POLICY).

pub fn resolve(raw: Option<&str>, default: RtPolicy) -> RtPolicy

Self::from_env_value with the unset-default injected, so a host test can ask what an RTEMS process would do with the same input.

pub fn current() -> RtPolicy

The process-wide policy, read from RT_PRIORITY_ENV on first use and cached. Caching matches C, which resolves its switch once in epicsThreadInit (osdThread.c:389), and keeps later set_var calls from changing the scheduling of threads already running.

Trait Implementations

impl Clone for RtPolicy

fn clone(&self) -> RtPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for RtPolicy

impl Debug for RtPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for RtPolicy

impl PartialEq for RtPolicy

fn eq(&self, other: &RtPolicy) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RtPolicy