Struct StoreMemoryMeter 

pub struct StoreMemoryMeter { /* private fields */ }

Per-Store memory limiter: enforces the per-invocation byte ceiling and records the invoking principal’s peak into the shared MemoryLedger.

Replaces a plain wasmtime::StoreLimits as the HostState limiter field. A pooled Store is leased by different principals, so the ceiling and the attributee are re-targeted per invocation via set; for a run-loop’s dedicated Store they are set once to the owner at build.

Implementations

impl StoreMemoryMeter

pub fn new( max_memory_bytes: usize, principal: PrincipalId, ledger: MemoryLedger, ) -> Self

Build a meter capped at max_memory_bytes, attributing growth to principal, recording into ledger.

pub fn set(&mut self, max_memory_bytes: usize, principal: PrincipalId)

Re-target for a new invocation: the principal’s memory ceiling and the principal to attribute peak growth to. Called at invocation SET, since a pooled Store crosses principals.

Trait Implementations

impl ResourceLimiter for StoreMemoryMeter

fn memory_growing( &mut self, _current: usize, desired: usize, maximum: Option<usize>, ) -> Result<bool>

Notifies the resource limiter that an instance’s linear memory has been requested to grow.

fn table_growing( &mut self, _current: usize, _desired: usize, _maximum: Option<usize>, ) -> Result<bool>

Notifies the resource limiter that an instance’s table has been requested to grow.

fn memory_grow_failed(&mut self, error: Error) -> Result<(), Error>

Notifies the resource limiter that growing a linear memory, permitted by the memory_growing method, has failed.

fn table_grow_failed(&mut self, error: Error) -> Result<(), Error>

Notifies the resource limiter that growing a linear memory, permitted by the table_growing method, has failed.

fn instances(&self) -> usize

The maximum number of instances that can be created for a Store.

fn tables(&self) -> usize

The maximum number of tables that can be created for a Store.

fn memories(&self) -> usize

The maximum number of linear memories that can be created for a Store