Trait glommio::ByteSliceMutExt[−][src]

pub trait ByteSliceMutExt {
    fn write_at<S: AsRef<[u8]> + ?Sized>(
        &mut self, 
        offset: usize, 
        src: &S
    ) -> usize;

    fn memset(&mut self, value: u8);
}

Utility methods for working with mutable byte slices/buffers.

Required methods

fn write_at<S: AsRef<[u8]> + ?Sized>(&mut self, offset: usize, src: &S) -> usize[src]

Writes data to this buffer from a user-provided byte slice, starting at a particular offset

Returns

The amount of bytes written.

Examples

use glommio::{io::DmaFile, ByteSliceMutExt, LocalExecutor};

let ex = LocalExecutor::default();
ex.run(async {
    let file = DmaFile::create("test.txt").await.unwrap();
    let mut buf = file.alloc_dma_buffer(4096);
    let vec = vec![1; 64];
    let n = buf.write_at(0, &vec);
    assert_eq!(n, 64); // wrote 64 bytes.

    let n = buf.write_at(4090, &vec);
    assert_eq!(n, 6); // wrote 6 bytes, as there are only 6 bytes left from this offset
    file.close().await.unwrap();
});

fn memset(&mut self, value: u8)[src]

Writes the specified value into all bytes of this buffer

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Implementors

impl<T: AsMut<[u8]> + ?Sized> ByteSliceMutExt for T[src]

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