Struct qutex::QrwLock
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pub struct QrwLock<T> { /* fields omitted */ }
A lock-free queue-backed read/write data lock.
Methods
impl<T> QrwLock<T>
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fn new(val: T) -> QrwLock<T>
Creates and returns a new QrwLock
.
fn request_read(self) -> FutureReadGuard<T>
Returns a new FutureReadGuard
which can be used as a future and will
resolve into a ReadGuard
.
fn request_write(self) -> FutureWriteGuard<T>
Returns a new FutureWriteGuard
which can be used as a future and will
resolve into a WriteGuard
.
unsafe fn push_request(&self, req: QrwRequest)
Pushes a lock request onto the queue.
fn get_mut(&mut self) -> Option<&mut T>
Returns a mutable reference to the inner Vec
if there are currently
no other copies of this QrwLock
.
Since this call borrows the inner lock mutably, no actual locking needs to take place---the mutable borrow statically guarantees no locks exist.
fn as_ptr(&self) -> *const T
Returns a reference to the inner value.
This is frought with potential peril.
fn as_mut_ptr(&self) -> *mut T
Returns a mutable reference to the inner value.
Drinking water from the tap in 1850's London would be safer.
unsafe fn process_queue(&self)
Pops the next lock request in the queue if possible.
If this lock is unlocked, read or write-locks this lock and unparks the next requester task in the queue.
If this lock is write-locked, this function does nothing.
If this lock is read-locked and the next request or consecutive requests in the queue are read requests, those requests will be fulfilled, unparking their respective tasks and incrementing the read-lock count appropriately.
unsafe fn release_reader(&self)
Decreases the reader count by one and unparks the next requester task in the queue if possible.
unsafe fn release_writer(&self)
Unlocks this lock and unparks the next requester task in the queue if possible.
Trait Implementations
impl<T> From<T> for QrwLock<T>
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impl<T> Clone for QrwLock<T>
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fn clone(&self) -> QrwLock<T>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more