Struct WitHost 

pub struct WitHost { /* private fields */ }

Host-side resource tracker for WIT-based WASM plugins.

Enforces a configurable upper bound on the number of concurrently allocated resources to prevent unbounded memory growth in the host.

Thread-safe: uses a CAS loop on an atomic counter so concurrent allocate calls cannot race past the limit.

Implementations

impl WitHost

pub fn new() -> Self

Creates a new WitHost with the default resource limit (1000).

pub fn with_max_resources(max: usize) -> Self

Creates a new WitHost with an explicit maximum resource count.

pub fn allocate(&self, _name: &str) -> Result<(), CamelError>

Allocates a resource slot.

Returns Err(CamelError::ProcessorError) if the resource limit would be exceeded. Uses a CAS loop to avoid TOCTOU races when called concurrently from multiple threads.

pub fn deallocate(&self, _name: &str)

Deallocates a resource slot, freeing capacity for future allocations.

pub fn resource_count(&self) -> usize

Returns the current number of allocated resources.

pub fn max_resources(&self) -> usize

Returns the configured maximum resource limit.

Trait Implementations

impl Debug for WitHost

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

Formats the value using the given formatter.

impl Default for WitHost

fn default() -> Self

Returns the “default value” for a type.