Struct UpgradableAsyncRwLock 

pub struct UpgradableAsyncRwLock<T> { /* private fields */ }

A Tokio-based async rwlock with an upgradable read mode.

All write and upgradable_read acquisitions take an internal async mutex (“gate”) first. This ensures that upgrading from read to write does not allow another writer to slip in.

Implementations

impl<T> UpgradableAsyncRwLock<T>

pub fn new(value: T) -> Self

Create a new lock wrapping value.

pub async fn read(&self) -> RwLockReadGuard<'_, T>

Acquire a shared read guard.

pub async fn write(&self) -> UpgradableAsyncRwLockWriteGuard<'_, T>

Acquire an exclusive write guard.

Writers are serialized through the internal gate.

pub async fn upgradable_read( &self, ) -> UpgradableAsyncRwLockUpgradableReadGuard<'_, T>

Acquire an upgradable read guard.

This allows shared reads, then a later UpgradableAsyncRwLockUpgradableReadGuard::upgrade to exclusive write while holding the same gate token.

pub fn into_inner(self) -> T

Consume the lock and return the wrapped value.