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.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 4 bytes

Size for each variant:

• Error: 0 bytes
• ProceedWithoutKillingReader: 0 bytes
• Success: 0 bytes
• ClearReaderSlot: 0 bytes
• ReaderProcessTerminated: 0 bytes