fuchsia_fs::file

Trait AsyncReadAt

Source 
pub trait AsyncReadAt {
    // Required method
    fn poll_read_at(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        offset: u64,
        buf: &mut [u8],
    ) -> Poll<Result<usize>>;
}
Expand description

Trait for reading at a given offset asynchronously. This is basically futures::io::AsyncRead with an extra offset.

Required Methods§

Source

fn poll_read_at( self: Pin<&mut Self>, cx: &mut Context<'_>, offset: u64, buf: &mut [u8], ) -> Poll<Result<usize>>

Attempt to read at most buf.len() bytes starting at offset into buf. On success returns the number of bytes read. Contents of buf are only altered on success. Reads of more than zero but fewer than buf.len() bytes do NOT indicate EOF. Reads of zero bytes only occur if buf.len() == 0 or EOF.

Implementors§