Enum TimerBackend 

#[non_exhaustive]
pub enum TimerBackend {
    SleepSlice,
    Condvar,
}

Which primitive the process-wide release thread waits on.

Descriptive, not a knob: the wheel picks the best available backend and records what it got. MOQTAP_RELEASE_TIMER overrides it only to diagnose a host.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

SleepSlice

One dedicated OS thread sleeping in SLICE-bounded std::thread::sleep steps and parking on an untimed Condvar when no deadline is armed. The backend on every platform, and sub-millisecond on all of them: measured p50 lateness 0.11-0.17 ms, p95 0.52-0.57 ms on Windows 11.

Condvar

std::sync::Condvar::wait_timeout, reachable only by setting MOQTAP_RELEASE_TIMER=condvar. Precise on Unix, where it is backed by a CLOCK_MONOTONIC hrtimer; on Windows it is bounded below by the ~15.6 ms system tick (measured p50 lateness 12.26 ms for a 3 ms deadline) and is the forced-diagnosis backend rather than a fallback.

Implementations

impl TimerBackend

pub const fn is_high_resolution(self) -> bool

Whether this backend can resolve delays below the ~15.6 ms Windows system tick.

SleepSlice => true on every platform. Condvar => cfg!(unix) — platform-dependent, because it is the good primitive on Unix and the degraded one on Windows, and the type says so rather than the reader having to know.

pub const fn as_str(self) -> &'static str

A stable, lowercase, machine-readable name for reports: "sleep-slice" / "condvar".

Trait Implementations

impl Clone for TimerBackend

fn clone(&self) -> TimerBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TimerBackend

impl Debug for TimerBackend

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

Formats the value using the given formatter.

impl Eq for TimerBackend

impl PartialEq for TimerBackend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TimerBackend