Trait BlockService 

pub trait BlockService: Send + Sync {
    // Required methods
    fn allocate_buffer(&self, max_len: usize) -> OwnedBuffer;
    fn read_blocks(
        &self,
        device_offset: u64,
        dest_buffer: OwnedBuffer,
        on_complete: Box<dyn FnOnce(Result<OwnedBuffer, Error>) + Send>,
    ) -> Result<(), Error>;
}

Interface for block storage services providing read buffers and block read operations.

Required Methods

fn allocate_buffer(&self, max_len: usize) -> OwnedBuffer

Allocates a read buffer of at most max_len bytes (OwnedBuffer).

max_len must be greater than zero. Implementations must guarantee that the returned buffer satisfies 0 < buffer.len() <= max_len and that buffer.len() is a multiple of BLOCK_SIZE.

fn read_blocks( &self, device_offset: u64, dest_buffer: OwnedBuffer, on_complete: Box<dyn FnOnce(Result<OwnedBuffer, Error>) + Send>, ) -> Result<(), Error>

Submits a read for the specified range from device_offset into dest_buffer. When the read completes, on_complete is invoked with the result containing the buffer.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors