Struct ReaderSlot 

pub struct ReaderSlot { /* private fields */ }

Held by a snapshot reader for its lifetime; the registration disappears (unlink + lock release) on drop, and the LOCK disappears even on crash.

Implementations

impl ReaderSlot

pub fn register(db: &Path, gen: u64) -> Result<ReaderSlot>

Register a reader pinned at gen. Failure to register is returned as an error: an unregistered reader is exactly the unsafe state.

pub fn set_generation(&mut self, generation: u64) -> Result<()>

Replace a conservative generation-zero reservation with the generation selected from metadata. While the two framed copies are being changed, a writer sees either 0, the final generation, or a mismatch that also decodes as 0. Every intermediate state therefore stops recycling.

Trait Implementations

impl Drop for ReaderSlot

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.