Struct RwLockReadGuardArc

pub struct RwLockReadGuardArc<T> {
    lock: NonNull<T>,
}

An owned, reference-counting guard that releases the read lock when dropped.

Fields

lock: NonNull<T>

WARNING: This doesn’t actually point to a T! It points to a RwLock<T>, via a pointer obtained with Arc::into_raw. We lie for covariance.

Implementations

impl<T> RwLockReadGuardArc<T>

unsafe fn inner_arc(guard: &Self) -> ManuallyDrop<Arc<RwLock<T>>>

Constructs the underlying Arc back from the underlying RwLock.

Safety

Both the returned Arc and the guard will decrement their reference counts on drop! So one of the two must be forgotten.

unsafe fn from_arc(arc: Arc<RwLock<T>>) -> Self

Constructs a guard from the underlying Arc.

Safety

A read lock must be acquired before calling this.

Trait Implementations

impl<T: Debug> Debug for RwLockReadGuardArc<T>

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

Formats the value using the given formatter.

impl<T> Deref for RwLockReadGuardArc<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T: Display> Display for RwLockReadGuardArc<T>

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

Formats the value using the given formatter.

impl<T> Drop for RwLockReadGuardArc<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T: Send + Sync> Send for RwLockReadGuardArc<T>

impl<T: Send + Sync> Sync for RwLockReadGuardArc<T>