Method write

fendermint/storage/src/im.rs:98–111

Take a snapshot to accumulate writes until they are committed. Take a write-lock on the data if necessary, but beware it doesn't work well with STM.

(&self)

    /// Take a snapshot to accumulate writes until they are committed.
    /// Take a write-lock on the data if necessary, but beware it doesn't work well with STM.
    fn write(&self) -> Self::Tx<'_> {
        // Take this lock first, otherwise we might be blocking `data` from anyone being able to commit.
        let token = if self.lock_writes {
            Some(self.write_token.lock().unwrap())
        } else {
            None
        };
        Transaction {
            backend: self,
            data: self.data.lock().unwrap().clone(),
            token,
            _mode: Write,
        }
    }
}

/// A transaction that can be read-only with no write lock taken,