Struct spin::rwlock::RwLockWriteGuard [−][src]
This is supported on crate feature
rwlock
only.Expand description
A guard that provides mutable data access.
When the guard falls out of scope it will release the lock.
Implementations
Downgrades the writable lock guard to a readable, shared lock guard. Cannot fail and is guaranteed not to spin.
let mylock = spin::RwLock::new(0); let mut writable = mylock.write(); *writable = 1; let readable = writable.downgrade(); // This is guaranteed not to spin assert_eq!(*readable, 1);
Downgrades the writable lock guard to an upgradable, shared lock guard. Cannot fail and is guaranteed not to spin.
let mylock = spin::RwLock::new(0); let mut writable = mylock.write(); *writable = 1; let readable = writable.downgrade_to_upgradeable(); // This is guaranteed not to spin assert_eq!(*readable, 1);
Leak the lock guard, yielding a mutable reference to the underlying data.
Note that this function will permanently lock the original lock.
let mylock = spin::RwLock::new(0); let data: &mut i32 = spin::RwLockWriteGuard::leak(mylock.write()); *data = 1; assert_eq!(*data, 1);
Trait Implementations
Auto Trait Implementations
impl<'a, T, R = Spin> !RefUnwindSafe for RwLockWriteGuard<'a, T, R>
impl<'a, T: ?Sized, R> Unpin for RwLockWriteGuard<'a, T, R> where
R: Unpin,
impl<'a, T, R = Spin> !UnwindSafe for RwLockWriteGuard<'a, T, R>