Struct MappedSharedMutexReadGuard

pub struct MappedSharedMutexReadGuard<'mutex, T: ?Sized + 'mutex> { /* private fields */ }

A read guard to a sub-borrow of an original SharedMutexReadGuard.

Unlike SharedMutexReadGuard, it cannot be used to wait on a Condvar.

Implementations

impl<'mutex, T: ?Sized> MappedSharedMutexReadGuard<'mutex, T>

pub fn map<U: ?Sized, F>( self, action: F, ) -> MappedSharedMutexReadGuard<'mutex, U>

where F: FnOnce(&T) -> &U,

Transform this guard into a sub-borrow of the original data.

pub fn option_map<U: ?Sized, F>( self, action: F, ) -> Option<MappedSharedMutexReadGuard<'mutex, U>>

where F: FnOnce(&T) -> Option<&U>,

Conditionally transform this guard into a sub-borrow of the original data.

pub fn result_map<U: ?Sized, E, F>( self, action: F, ) -> Result<MappedSharedMutexReadGuard<'mutex, U>, (Self, E)>

where F: FnOnce(&T) -> Result<&U, E>,

Conditionally transform this guard into a sub-borrow of the original data.

If the transformation operation is aborted, returns the original guard.

pub fn recover<U: ?Sized>( self, mutex: &'mutex SharedMutex<U>, ) -> Result<SharedMutexReadGuard<'mutex, U>, Self>

Recover the original guard for waiting.

Takes the original mutex to recover the original type and data. If the passed mutex is not the same object as the original mutex, returns Err.

Trait Implementations

impl<'mutex, T: ?Sized + Debug> Debug for MappedSharedMutexReadGuard<'mutex, T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'mutex, T: ?Sized> Deref for MappedSharedMutexReadGuard<'mutex, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<'mutex, T: ?Sized> Drop for MappedSharedMutexReadGuard<'mutex, T>

fn drop(&mut self)

Executes the destructor for this type.