Tracking Issue for {Mutex, RwLock}::data_ptr · Issue #140368 · rust-lang/rust (original) (raw)

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Feature gate: #![feature(mutex_data_ptr)], #![feature(rwlock_data_ptr)]

This is a tracking issue for allowing unguarded access to the inner value of a Mutex or RwLock. Previous discussion here: rust-lang/libs-team#531

// std::sync

impl<T: ?Sized> Mutex { pub fn data_ptr(&self) -> *mut T; }

impl<T: ?Sized> RwLock { pub fn data_ptr(&self) -> *mut T; }

(Remember to update the S-tracking-* label when checking boxes.)

Return a LockResult or not?
Return *mut T like existing APIs (Cell::as_ptr / MaybeUninit::as[_mut]_ptr / Vec::as_ptr / ...) or be more precise and return NonNull<T>?