Struct async_lock::RwLockWriteGuard[][src]

pub struct RwLockWriteGuard<'a, T: ?Sized> { /* fields omitted */ }

A guard that releases the write lock when dropped.

Implementations

impl<'a, T: ?Sized> RwLockWriteGuard<'a, T>[src]

pub fn downgrade(guard: Self) -> RwLockReadGuard<'a, T>[src]

Downgrades into a regular reader guard.

Examples

use async_lock::{RwLock, RwLockWriteGuard};

let lock = RwLock::new(1);

let mut writer = lock.write().await;
*writer += 1;

assert!(lock.try_read().is_none());

let reader = RwLockWriteGuard::downgrade(writer);
assert_eq!(*reader, 2);

assert!(lock.try_read().is_some());

pub fn downgrade_to_upgradable(guard: Self) -> RwLockUpgradableReadGuard<'a, T>[src]

Downgrades into an upgradable reader guard.

Examples

use async_lock::{RwLock, RwLockUpgradableReadGuard, RwLockWriteGuard};

let lock = RwLock::new(1);

let mut writer = lock.write().await;
*writer += 1;

assert!(lock.try_read().is_none());

let reader = RwLockWriteGuard::downgrade_to_upgradable(writer);
assert_eq!(*reader, 2);

assert!(lock.try_write().is_none());
assert!(lock.try_read().is_some());

assert!(RwLockUpgradableReadGuard::try_upgrade(reader).is_ok())

Trait Implementations

impl<T: Debug + ?Sized> Debug for RwLockWriteGuard<'_, T>[src]

impl<T: ?Sized> Deref for RwLockWriteGuard<'_, T>[src]

type Target = T

The resulting type after dereferencing.

impl<T: ?Sized> DerefMut for RwLockWriteGuard<'_, T>[src]

impl<T: Display + ?Sized> Display for RwLockWriteGuard<'_, T>[src]

impl<T: Send + ?Sized> Send for RwLockWriteGuard<'_, T>[src]

impl<T: Sync + ?Sized> Sync for RwLockWriteGuard<'_, T>[src]

Auto Trait Implementations

impl<'a, T> !RefUnwindSafe for RwLockWriteGuard<'a, T>

impl<'a, T: ?Sized> Unpin for RwLockWriteGuard<'a, T>

impl<'a, T> !UnwindSafe for RwLockWriteGuard<'a, T>

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> ToString for T where
    T: Display + ?Sized
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impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.