Enum abi_stable::external_types::parking_lot::once::ROnceState [−][src]
#[repr(u8)]
pub enum ROnceState {
New,
Poisoned,
InProgress,
Done,
}
Expand description
Describes the running state of an ROnce.
Variants
An ROnce that hasn’t started running
An ROnce that panicked inside call_once*
An ROnce that is the middle of calling call_once*
An ROnce that has already run.
Implementations
Whether the ROnce is poisoned,requiring call_once_force to run.
Example
use abi_stable::external_types::ROnce;
use std::panic::AssertUnwindSafe;
let once = ROnce::new();
let _ = std::panic::catch_unwind(AssertUnwindSafe(|| {
once.call_once(|| panic!());
}));
assert!(once.state().poisoned());
Trait Implementations
Performs the conversion.
Performs the conversion.
type StaticEquivalent = _static_ROnceState
type IsNonZeroType = False
type IsNonZeroType = False
Whether this type has a single invalid bit-pattern. Read more
The layout of the type provided by implementors.
const
-equivalents of the associated types.
Auto Trait Implementations
impl RefUnwindSafe for ROnceState
impl Send for ROnceState
impl Sync for ROnceState
impl Unpin for ROnceState
impl UnwindSafe for ROnceState
Blanket Implementations
Mutably borrows from an owned value. Read more
type ROwned = T
type ROwned = T
The owned type, stored in RCow::Owned
type ForSelf = WithMetadata_<T, T>
type ForSelf = WithMetadata_<T, T>
This is always WithMetadata_<Self, Self>
Compares the address of self
with the address of other
. Read more
Emulates the pipeline operator, allowing method syntax in more places. Read more
The same as piped
except that the function takes &Self
Useful for functions that take &Self
instead of Self
. Read more
The same as piped
, except that the function takes &mut Self
.
Useful for functions that take &mut Self
instead of Self
. Read more
Mutates self using a closure taking self by mutable reference, passing it along the method chain. Read more
Observes the value of self, passing it along unmodified. Useful in long method chains. Read more
Performs a conversion with Into
.
using the turbofish .into_::<_>()
syntax. Read more
Performs a reference to reference conversion with AsRef
,
using the turbofish .as_ref_::<_>()
syntax. Read more
Performs a mutable reference to mutable reference conversion with AsMut
,
using the turbofish .as_mut_::<_>()
syntax. Read more
unsafe fn transmute_element<T>(
self
) -> <Self as CanTransmuteElement<T>>::TransmutedPtr where
Self: CanTransmuteElement<T>,
unsafe fn transmute_element<T>(
self
) -> <Self as CanTransmuteElement<T>>::TransmutedPtr where
Self: CanTransmuteElement<T>,
Transmutes the element type of this pointer.. Read more
type Type = T
type Type = T
This is always Self
.
Converts a value back to the original type.
Converts a mutable reference back to the original type.
alloc
only.Converts a box back to the original type.
Converts a value back to the original type.
Converts a reference back to the original type.
Converts a mutable reference back to the original type.
alloc
only.Converts a box back to the original type.
alloc
only.Converts an Arc back to the original type.
alloc
only.Converts an Rc back to the original type.