Struct tokio::sync::OwnedMutexGuard
source · [−]pub struct OwnedMutexGuard<T: ?Sized> { /* private fields */ }
Expand description
An owned handle to a held Mutex
.
This guard is only available from a Mutex
that is wrapped in an Arc
. It
is identical to MutexGuard
, except that rather than borrowing the Mutex
,
it clones the Arc
, incrementing the reference count. This means that
unlike MutexGuard
, it will have the 'static
lifetime.
As long as you have this guard, you have exclusive access to the underlying
T
. The guard internally keeps a reference-counted pointer to the original
Mutex
, so even if the lock goes away, the guard remains valid.
The lock is automatically released whenever the guard is dropped, at which
point lock
will succeed yet again.
Implementations
sourceimpl<T: ?Sized> OwnedMutexGuard<T>
impl<T: ?Sized> OwnedMutexGuard<T>
sourcepub fn mutex(this: &Self) -> &Arc<Mutex<T>>
pub fn mutex(this: &Self) -> &Arc<Mutex<T>>
Returns a reference to the original Arc<Mutex>
.
use std::sync::Arc;
use tokio::sync::{Mutex, OwnedMutexGuard};
async fn unlock_and_relock(guard: OwnedMutexGuard<u32>) -> OwnedMutexGuard<u32> {
println!("1. contains: {:?}", *guard);
let mutex: Arc<Mutex<u32>> = OwnedMutexGuard::mutex(&guard).clone();
drop(guard);
let guard = mutex.lock_owned().await;
println!("2. contains: {:?}", *guard);
guard
}
Trait Implementations
sourceimpl<T: ?Sized + Debug> Debug for OwnedMutexGuard<T>
impl<T: ?Sized + Debug> Debug for OwnedMutexGuard<T>
sourceimpl<T: ?Sized> Deref for OwnedMutexGuard<T>
impl<T: ?Sized> Deref for OwnedMutexGuard<T>
sourceimpl<T: ?Sized> DerefMut for OwnedMutexGuard<T>
impl<T: ?Sized> DerefMut for OwnedMutexGuard<T>
sourceimpl<T: ?Sized + Display> Display for OwnedMutexGuard<T>
impl<T: ?Sized + Display> Display for OwnedMutexGuard<T>
sourceimpl<T: ?Sized> Drop for OwnedMutexGuard<T>
impl<T: ?Sized> Drop for OwnedMutexGuard<T>
impl<T> Sync for OwnedMutexGuard<T> where
T: ?Sized + Send + Sync,
Auto Trait Implementations
impl<T> !RefUnwindSafe for OwnedMutexGuard<T>
impl<T: ?Sized> Send for OwnedMutexGuard<T> where
T: Send,
impl<T: ?Sized> Unpin for OwnedMutexGuard<T>
impl<T> !UnwindSafe for OwnedMutexGuard<T>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more