pub struct ErrorSlot(Arc<Mutex<Option<SharedPeerError>>>);Expand description
A shared error slot for peer errors.
§Correctness
Error slots are shared between sync and async code. In async code, the error mutex should be held for as short a time as possible. This avoids blocking the async task thread on acquiring the mutex.
If the value behind the mutex is just data, it’s usually appropriate to use a blocking mutex … wrap the
Arc<Mutex<...>>in a struct that provides non-async methods for performing operations on the data within, and only lock the mutex inside these methods
https://docs.rs/tokio/1.15.0/tokio/sync/struct.Mutex.html#which-kind-of-mutex-should-you-use
Tuple Fields§
§0: Arc<Mutex<Option<SharedPeerError>>>Implementations§
source§impl ErrorSlot
impl ErrorSlot
sourcepub fn try_get_error(&self) -> Option<SharedPeerError>
pub fn try_get_error(&self) -> Option<SharedPeerError>
Read the current error in the slot.
Returns None if there is no error in the slot.
§Correctness
Briefly locks the error slot’s threaded std::sync::Mutex, to get a
reference to the error in the slot.
sourcepub fn try_update_error(&self, e: SharedPeerError) -> Result<(), AlreadyErrored>
pub fn try_update_error(&self, e: SharedPeerError) -> Result<(), AlreadyErrored>
Update the current error in the slot.
Returns Err(AlreadyErrored) if there was already an error in the slot.
§Correctness
Briefly locks the error slot’s threaded std::sync::Mutex, to check for
a previous error, then update the error in the slot.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for ErrorSlot
impl RefUnwindSafe for ErrorSlot
impl Send for ErrorSlot
impl Sync for ErrorSlot
impl Unpin for ErrorSlot
impl UnwindSafe for ErrorSlot
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Calls
.tap_borrow() only in debug builds, and is erased in release
builds.§fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
Calls
.tap_borrow_mut() only in debug builds, and is erased in release
builds.§fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
Calls
.tap_ref() only in debug builds, and is erased in release
builds.§fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
Calls
.tap_ref_mut() only in debug builds, and is erased in release
builds.§fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
Calls
.tap_deref() only in debug builds, and is erased in release
builds.