Struct NoPayloads 

pub struct NoPayloads;

A payload store holding nothing: every read errors and every release is a no-op. What a World built without a blob runs on – unit tests, and worlds assembled entirely from runtime-only components.

Trait Implementations

impl PayloadStore for NoPayloads

fn read(&mut self, _locator: &PayloadLocator) -> Result<&[u8], CnResult>

Read the bytes a locator points at. &mut self because a disk-backed store may load an overflow section lazily on first access. Errors when the payload was released, the locator is out of range, or a lazy load fails.

fn release(&mut self, _blob_index: u32)

Release an entire blob’s in-memory payload once every system that needs it has finished (e.g. after GPU upload). A store with nothing resident for blob_index treats this as a no-op.

fn disk_backed(&self) -> bool

Whether the payloads are backed by files still on disk, so a released payload can be re-read on demand rather than kept RAM-resident.

fn release_all_resident(&mut self) -> usize

Release every resident section at once, returning the bytes freed. World::start calls this after init: systems read compiled payloads only while initing and cache what they keep, so nothing consults the store again. A store with nothing resident frees nothing.