Struct VmContextRegistryGuard 

pub struct VmContextRegistryGuard { /* private fields */ }

RAII owner of the thread-local node:vm context registry for one session.

Mirrors the per-session ownership of PendingPromises (created fresh per session, dropped at teardown): a session holds one guard, and dropping it evicts every context slot the session reserved. Because Drop runs on every termination path of the frame that holds the guard — normal return, ? error, early return, and panic unwinding — the slots are reclaimed unconditionally, not only on the happy path. This prevents a reused isolate thread from accumulating vm.createContext() slots across executions toward MAX_VM_CONTEXTS.

Implementations

impl VmContextRegistryGuard

pub fn new() -> Self

Begin a session’s ownership of the vm context registry, sweeping any slots a prior session left on this (reused) isolate thread so the new session starts from an empty registry.

Trait Implementations

impl Default for VmContextRegistryGuard

fn default() -> Self

Returns the “default value” for a type.

impl Drop for VmContextRegistryGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.