Struct ekv::ReadTransaction

pub struct ReadTransaction<'a, F: Flash + 'a, M: RawMutex + 'a> { /* private fields */ }

In-progress read transaction.

Implementations

impl<'a, F: Flash + 'a, M: RawMutex + 'a> ReadTransaction<'a, F, M>

pub async fn read( &self, key: &[u8], value: &mut [u8] ) -> Result<usize, ReadError<F::Error>>

Read a key from the database.

The value is stored in the value buffer, and the length is returned.

pub async fn read_all<'b>(&'b self) -> Result<Cursor<'b, F, M>, Error<F::Error>>

Get a cursor for reading all the keys in the database.

This is equivalent to calling read_range(..).

The cursor returns the keys in lexicographically ascending order.

pub async fn read_range<'b>( &'b self, range: impl RangeBounds<&'b [u8]> ) -> Result<Cursor<'b, F, M>, Error<F::Error>>

Get a cursor for reading keys in the database that are in the given range.

The cursor returns the keys in lexicographically ascending order.

Trait Implementations

impl<'a, F: Flash + 'a, M: RawMutex + 'a> Drop for ReadTransaction<'a, F, M>

fn drop(&mut self)

Executes the destructor for this type.