Struct AsyncRwLockReadWeakGuard 

pub struct AsyncRwLockReadWeakGuard<ST: SyncTypes, T: Send + Sync, LP: SyncRcPtr<AsyncRwLock<ST, T>>> { /* private fields */ }

Weak variant of AsyncRwLockReadGuard not hindering destruction of the associated AsyncRwLock.

In cases were it’s desired that long-living locking grants don’t prevent a destruction of the associated AsyncRwLock, or to break cycles, a AsyncRwLockReadWeakGuard may be used. To be obtained via AsyncRwLockReadGuard::into_weak().

An AsyncRwLockReadWeakGuard may get converted back into a full AsyncRwLockReadGuard via upgrade().

Implementations

impl<ST: SyncTypes, T: Send + Sync, LP: SyncRcPtr<AsyncRwLock<ST, T>>> AsyncRwLockReadWeakGuard<ST, T, LP>

pub fn upgrade(self) -> Option<AsyncRwLockReadGuard<ST, T, LP>>

Attempt to convert back into an AsyncRwLockReadGuard.

Returns the AsyncRwLockReadGuard wrapped in Some if the associated AsyncRwLock is still alive, `None otherwise.

Trait Implementations

impl<ST: SyncTypes, T: Send + Sync, LP: SyncRcPtr<AsyncRwLock<ST, T>>> Clone for AsyncRwLockReadWeakGuard<ST, T, LP>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<ST: SyncTypes, OT, LP: SyncRcPtr<AsyncRwLock<ST, OT>>, TAG> From<AsyncRwLockReadWeakGuard<ST, OT, LP>> for AsyncRwLockReadWeakGuardForInner<ST, OT, LP, TAG>

where OT: DerefInnerByTag<TAG> + Send + Sync, <OT as DerefInnerByTag<TAG>>::Output: Send + Sync,

fn from(value: AsyncRwLockReadWeakGuard<ST, OT, LP>) -> Self

Converts to this type from the input type.