Struct WindowFrameClockService 

pub struct WindowFrameClockService { /* private fields */ }

Implementations

impl WindowFrameClockService

pub fn fixed_delta_from_env() -> Option<Duration>

Returns the process-wide fixed frame delta override (if any).

This is cached (OnceLock) so it can be called from hot paths.

Env var precedence:

• FRET_DIAG_FIXED_FRAME_DELTA_MS (preferred)
• FRET_FRAME_CLOCK_FIXED_DELTA_MS (generic)

pub fn snapshot(&self, window: AppWindowId) -> Option<WindowFrameClockSnapshot>

pub fn fixed_delta(&self, window: AppWindowId) -> Option<Duration>

pub fn effective_fixed_delta(&self, window: AppWindowId) -> Option<Duration>

Returns the effective fixed frame delta for window.

This prefers an explicit per-window override set via set_fixed_delta, and falls back to the process-wide env override (if any).

pub fn set_snapshot( &mut self, window: AppWindowId, snapshot: WindowFrameClockSnapshot, )

pub fn set_fixed_delta(&mut self, window: AppWindowId, delta: Option<Duration>)

pub fn record_frame(&mut self, window: AppWindowId, frame_id: FrameId)

Record a best-effort frame clock snapshot for window (ADR 0240).

Within a single frame (as identified by frame_id), repeated calls are ignored to keep delta stable.

When a fixed delta override is enabled (via set_fixed_delta, or the env vars FRET_DIAG_FIXED_FRAME_DELTA_MS / FRET_FRAME_CLOCK_FIXED_DELTA_MS), the snapshot becomes deterministic and advances now_monotonic by delta each time frame_id changes.

pub fn remove(&mut self, window: AppWindowId)

Trait Implementations

impl Clone for WindowFrameClockService

fn clone(&self) -> WindowFrameClockService

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFrameClockService

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

Formats the value using the given formatter.

impl Default for WindowFrameClockService

fn default() -> WindowFrameClockService

Returns the “default value” for a type.