pub struct AtomicOnceCell<T> { /* private fields */ }
Expand description
A thread-safe container that does not require default initialization. The cell may be initialized
with set
and then retrieved as a reference with get
. Calling set
is thread-safe. The cell
will panic if the set
function is called more than once. The cell will only drop initialized elements.
§Guarantees
- The allocated memory will not be
default
initialized. - Elements initialized by
set
are immutable. - The synchronization is
lock-free
.
Implementations§
Trait Implementations§
source§impl<T> Default for AtomicOnceCell<T>
impl<T> Default for AtomicOnceCell<T>
source§fn default() -> AtomicOnceCell<T>
fn default() -> AtomicOnceCell<T>
Returns the “default value” for a type. Read more
source§impl<T> Drop for AtomicOnceCell<T>
impl<T> Drop for AtomicOnceCell<T>
impl<T> Sync for AtomicOnceCell<T>
Auto Trait Implementations§
impl<T> !RefUnwindSafe for AtomicOnceCell<T>
impl<T> Send for AtomicOnceCell<T>where
T: Send,
impl<T> Unpin for AtomicOnceCell<T>where
T: Unpin,
impl<T> UnwindSafe for AtomicOnceCell<T>where
T: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.