Struct AsyncTagLockTable 

pub struct AsyncTagLockTable<T>
where
    T: Hash + Eq + Clone + Debug,
{ /* private fields */ }

A table of per-tag async locks, sharable across tasks.

Implementations

impl<T> AsyncTagLockTable<T>

where T: Hash + Eq + Clone + Debug,

pub fn new() -> Self

Create an empty tag lock table.

pub fn is_empty(&self) -> bool

Whether no tags are currently locked.

pub fn len(&self) -> usize

The number of tags currently locked.

pub async fn lock_tag(&self, tag: T) -> AsyncTagLockGuard<T>

Acquire the lock for tag, waiting until it is free.

Blocks until this tag’s lock is free; other tags never block this one. The returned guard holds the tag until dropped, at which point the tag’s entry is removed if no guards remain.

pub fn try_lock_tag(&self, tag: T) -> Option<AsyncTagLockGuard<T>>

Try to acquire the lock for tag without waiting, or None if it is already held.

Never blocks. On success the guard holds the tag until dropped.

Trait Implementations

impl<T> Clone for AsyncTagLockTable<T>

where T: Hash + Eq + Clone + Debug + Clone,

fn clone(&self) -> AsyncTagLockTable<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for AsyncTagLockTable<T>

where T: Hash + Eq + Clone + Debug + Debug,

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

Formats the value using the given formatter.

impl<T> Default for AsyncTagLockTable<T>

where T: Hash + Eq + Clone + Debug,

fn default() -> Self

Returns the “default value” for a type.