Enum HandleSlowReadersReturnCode 

#[repr(i32)]
pub enum HandleSlowReadersReturnCode {
    Error = -2,
    ProceedWithoutKillingReader = -1,
    Success = 0,
    ClearReaderSlot = 1,
    ReaderProcessTerminated = 2,
}

Variants

Error = -2

An error condition and the reader was not killed.

ProceedWithoutKillingReader = -1

The callback was unable to solve the problem and agreed on MDBX_MAP_FULL error; MDBX should increase the database size or return MDBX_MAP_FULL error.

Success = 0

The callback solved the problem or just waited for a while, libmdbx should rescan the reader lock table and retry. This also includes a situation when corresponding transaction terminated in normal way by mdbx_txn_abort() or mdbx_txn_reset(), and may be restarted. I.e. reader slot isn’t needed to be cleaned from transaction.

ClearReaderSlot = 1

Transaction aborted asynchronous and reader slot should be cleared immediately, i.e. read transaction will not continue but mdbx_txn_abort() nor mdbx_txn_reset() will be called later.

ReaderProcessTerminated = 2

The reader process was terminated or killed, and MDBX should entirely reset reader registration.

Trait Implementations

impl Debug for HandleSlowReadersReturnCode

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

Formats the value using the given formatter.