Struct TRefLock 

pub struct TRefLock<T: ?Sized> { /* private fields */ }

J-C cfg-gated interior-mutable lock. Exposes RefCell-shaped .borrow() / .borrow_mut() whose returned guards Deref<Target = T>. Under the default feature set this is a thin newtype around RefCell<T> (zero overhead vs. the pre-J-C RefCell field); under feature = "send" it wraps RwLock<T> and the guards become RwLockReadGuard / RwLockWriteGuard.

Lock failure handling: the send build unwrap()s the lock result. The SendVm’s outer RwLock<()> serializes mutator access so a poisoned lock is a real bug (a panic in a guard’s user) and the propagating panic is the same UX as RefCell::borrow_mut on a re-entrant borrow.

Implementations

impl<T> TRefLock<T>

pub const fn new(v: T) -> Self

Construct a new lock around v.

pub fn borrow(&self) -> Ref<'_, T>

Borrow the lock immutably. The returned guard derefs to &T; callers use it identically to RefCell::borrow.

pub fn borrow_mut(&self) -> RefMut<'_, T>

Borrow the lock mutably. The returned guard derefs to &mut T; callers use it identically to RefCell::borrow_mut.

Trait Implementations

impl<T: Debug + ?Sized> Debug for TRefLock<T>

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

Formats the value using the given formatter.