Trait rustdb::stg::Storage

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pub trait Storage: Send + Sync {
    // Required methods
    fn size(&self) -> u64;
    fn read(&self, start: u64, data: &mut [u8]);
    fn write(&mut self, start: u64, data: &[u8]);
    fn commit(&mut self, size: u64);

    // Provided methods
    fn write_vec(&mut self, start: u64, data: Vec<u8>) { ... }
    fn write_data(&mut self, start: u64, data: Data, off: usize, len: usize) { ... }
    fn write_u64(&mut self, start: u64, value: u64) { ... }
    fn read_u64(&self, start: u64) -> u64 { ... }
    fn clone(&self) -> Box<dyn Storage> { ... }
    fn wait_complete(&self) { ... }
    fn reset(&mut self) { ... }
}
Expand description

Interface for database storage.

Required Methods§

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fn size(&self) -> u64

Get the size of the underlying storage. Note : this is valid initially and after a commit but is not defined after write is called.

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fn read(&self, start: u64, data: &mut [u8])

Read data from storage.

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fn write(&mut self, start: u64, data: &[u8])

Write byte slice to storage.

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fn commit(&mut self, size: u64)

Finish write transaction, size is new size of underlying storage.

Provided Methods§

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fn write_vec(&mut self, start: u64, data: Vec<u8>)

Write byte Vec to storage.

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fn write_data(&mut self, start: u64, data: Data, off: usize, len: usize)

Write Data slice to storage.

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fn write_u64(&mut self, start: u64, value: u64)

Write u64 to storage.

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fn read_u64(&self, start: u64) -> u64

Read u64 from storage.

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fn clone(&self) -> Box<dyn Storage>

Clone.

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fn wait_complete(&self)

Wait until current writes are complete.

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fn reset(&mut self)

Reset buffer

Implementors§