Struct holochain::prelude::dependencies::kitsune_p2p_types::dependencies::lair_keystore_api::dependencies::tokio::sync::MappedMutexGuard
source · pub struct MappedMutexGuard<'a, T>where
T: ?Sized,{ /* private fields */ }
Expand description
A handle to a held Mutex
that has had a function applied to it via MutexGuard::map
.
This can be used to hold a subfield of the protected data.
Implementations§
source§impl<'a, T> MappedMutexGuard<'a, T>where
T: ?Sized,
impl<'a, T> MappedMutexGuard<'a, T>where
T: ?Sized,
sourcepub fn map<U, F>(this: MappedMutexGuard<'a, T>, f: F) -> MappedMutexGuard<'a, U>where
F: FnOnce(&mut T) -> &mut U,
pub fn map<U, F>(this: MappedMutexGuard<'a, T>, f: F) -> MappedMutexGuard<'a, U>where
F: FnOnce(&mut T) -> &mut U,
Makes a new MappedMutexGuard
for a component of the locked data.
This operation cannot fail as the MappedMutexGuard
passed in already locked the mutex.
This is an associated function that needs to be used as MappedMutexGuard::map(...)
. A
method would interfere with methods of the same name on the contents of the locked data.
sourcepub fn try_map<U, F>(
this: MappedMutexGuard<'a, T>,
f: F
) -> Result<MappedMutexGuard<'a, U>, MappedMutexGuard<'a, T>>where
F: FnOnce(&mut T) -> Option<&mut U>,
pub fn try_map<U, F>(
this: MappedMutexGuard<'a, T>,
f: F
) -> Result<MappedMutexGuard<'a, U>, MappedMutexGuard<'a, T>>where
F: FnOnce(&mut T) -> Option<&mut U>,
Attempts to make a new MappedMutexGuard
for a component of the locked data. The
original guard is returned if the closure returns None
.
This operation cannot fail as the MappedMutexGuard
passed in already locked the mutex.
This is an associated function that needs to be used as MappedMutexGuard::try_map(...)
. A
method would interfere with methods of the same name on the contents of the locked data.
Trait Implementations§
source§impl<'a, T> Deref for MappedMutexGuard<'a, T>where
T: ?Sized,
impl<'a, T> Deref for MappedMutexGuard<'a, T>where
T: ?Sized,
source§impl<'a, T> DerefMut for MappedMutexGuard<'a, T>where
T: ?Sized,
impl<'a, T> DerefMut for MappedMutexGuard<'a, T>where
T: ?Sized,
source§impl<'a, T> Drop for MappedMutexGuard<'a, T>where
T: ?Sized,
impl<'a, T> Drop for MappedMutexGuard<'a, T>where
T: ?Sized,
impl<'a, T> Send for MappedMutexGuard<'a, T>where
T: 'a + Send + ?Sized,
impl<'a, T> Sync for MappedMutexGuard<'a, T>where
T: 'a + Sync + ?Sized,
Auto Trait Implementations§
impl<'a, T> !RefUnwindSafe for MappedMutexGuard<'a, T>
impl<'a, T: ?Sized> Unpin for MappedMutexGuard<'a, T>
impl<'a, T> !UnwindSafe for MappedMutexGuard<'a, T>
Blanket Implementations§
§impl<T> Any for Twhere
T: Any + ?Sized,
impl<T> Any for Twhere
T: Any + ?Sized,
§fn type_id_compat(&self) -> TypeId
fn type_id_compat(&self) -> TypeId
§impl<T> ArchivePointee for T
impl<T> ArchivePointee for T
§type ArchivedMetadata = ()
type ArchivedMetadata = ()
§fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata
fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata
§impl<F, W, T, D> Deserialize<With<T, W>, D> for Fwhere
W: DeserializeWith<F, T, D>,
D: Fallible + ?Sized,
F: ?Sized,
impl<F, W, T, D> Deserialize<With<T, W>, D> for Fwhere
W: DeserializeWith<F, T, D>,
D: Fallible + ?Sized,
F: ?Sized,
§fn deserialize(
&self,
deserializer: &mut D
) -> Result<With<T, W>, <D as Fallible>::Error>
fn deserialize(
&self,
deserializer: &mut D
) -> Result<With<T, W>, <D as Fallible>::Error>
§impl<T> FutureExt for T
impl<T> FutureExt for T
§fn with_context(self, otel_cx: Context) -> WithContext<Self> ⓘ
fn with_context(self, otel_cx: Context) -> WithContext<Self> ⓘ
§fn with_current_context(self) -> WithContext<Self> ⓘ
fn with_current_context(self) -> WithContext<Self> ⓘ
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
§impl<T> Pointable for T
impl<T> Pointable for T
§impl<SS, SP> SupersetOf<SS> for SPwhere
SS: SubsetOf<SP>,
impl<SS, SP> SupersetOf<SS> for SPwhere
SS: SubsetOf<SP>,
§fn to_subset(&self) -> Option<SS>
fn to_subset(&self) -> Option<SS>
self
from the equivalent element of its
superset. Read more§fn is_in_subset(&self) -> bool
fn is_in_subset(&self) -> bool
self
is actually part of its subset T
(and can be converted to it).§fn to_subset_unchecked(&self) -> SS
fn to_subset_unchecked(&self) -> SS
self.to_subset
but without any property checks. Always succeeds.§fn from_subset(element: &SS) -> SP
fn from_subset(element: &SS) -> SP
self
to the equivalent element of its superset.