Struct parking_lot::RwLockWriteGuard
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#[must_use]pub struct RwLockWriteGuard<'a, T: ?Sized + 'a> { /* fields omitted */ }
RAII structure used to release the exclusive write access of a lock when dropped.
Methods
impl<'a, T: ?Sized + 'a> RwLockWriteGuard<'a, T>[src]
fn downgrade(self) -> RwLockReadGuard<'a, T>
Atomically downgrades a write lock into a read lock without allowing any writers to take exclusive access of the lock in the meantime.
Note that if there are any writers currently waiting to take the lock then other readers may not be able to acquire the lock even if it was downgraded.
fn unlock_fair(self)
Unlocks the RwLock using a fair unlock protocol.
By default, RwLock is unfair and allow the current thread to re-lock
the rwlock before another has the chance to acquire the lock, even if
that thread has been blocked on the RwLock for a long time. This is
the default because it allows much higher throughput as it avoids
forcing a context switch on every rwlock unlock. This can result in one
thread acquiring a RwLock many more times than other threads.
However in some cases it can be beneficial to ensure fairness by forcing
the lock to pass on to a waiting thread if there is one. This is done by
using this method instead of dropping the RwLockWriteGuard normally.
Trait Implementations
impl<'a, T: ?Sized + 'a> Deref for RwLockWriteGuard<'a, T>[src]
type Target = T
The resulting type after dereferencing
fn deref(&self) -> &T
The method called to dereference a value
impl<'a, T: ?Sized + 'a> DerefMut for RwLockWriteGuard<'a, T>[src]
fn deref_mut(&mut self) -> &mut T
The method called to mutably dereference a value