Struct Backoff 

pub struct Backoff {
    pub initial: Duration,
    pub ceiling: Duration,
    pub factor: u32,
}

The inter-probe sleep schedule for eventually and eventually_blocking.

After a failed probe the helper naps, then doubles (or multiplies by factor) the nap each time, never exceeding ceiling. The final nap before the deadline is additionally clamped to the remaining time, so the helper never oversleeps past its own timeout and skips a last probe.

Fields

initial: Duration

The first inter-probe nap.

ceiling: Duration

The longest a single inter-probe nap may grow to.

factor: u32

The multiplier applied to the nap after each failed probe. A factor of 1 makes the nap constant; values below 1 are not possible.

Trait Implementations

impl Clone for Backoff

fn clone(&self) -> Backoff

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Backoff

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

Formats the value using the given formatter.

impl Default for Backoff

fn default() -> Backoff

Starts at 1ms, doubles, and caps at 100ms: tight enough that a condition which becomes true is noticed almost immediately, loose enough that a multi-second wait is a few dozen probes, not thousands.

impl PartialEq for Backoff

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Backoff

impl Eq for Backoff

impl StructuralPartialEq for Backoff