Struct tokio_core::io::Window
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[src]
pub struct Window<T> { /* fields omitted */ }A owned window around an underlying buffer.
Normally slices work great for considering sub-portions of a buffer, but unfortunately a slice is a borrowed type in Rust which has an associated lifetime. When working with future and async I/O these lifetimes are not always appropriate, and are sometimes difficult to store in tasks. This type strives to fill this gap by providing an "owned slice" around an underlying buffer of bytes.
A Window<T> wraps an underlying buffer, T, and has configurable
start/end indexes to alter the behavior of the AsRef<[u8]> implementation
that this type carries.
This type can be particularly useful when working with the write_all
combinator in this crate. Data can be sliced via Window, consumed by
write_all, and then earned back once the write operation finishes through
the into_inner method on this type.
Methods
impl<T: AsRef<[u8]>> Window<T>[src]
fn new(t: T) -> Window<T>
Creates a new window around the buffer t defaulting to the entire
slice.
Further methods can be called on the returned Window<T> to alter the
window into the data provided.
fn get_ref(&self) -> &T
Gets a shared reference to the underlying buffer inside of this
Window.
fn get_mut(&mut self) -> &mut T
Gets a mutable reference to the underlying buffer inside of this
Window.
fn into_inner(self) -> T
Consumes this Window, returning the underlying buffer.
fn start(&self) -> usize
Returns the starting index of this window into the underlying buffer
T.
fn end(&self) -> usize
Returns the end index of this window into the underlying buffer
T.
fn set_start(&mut self, start: usize) -> &mut Window<T>
Changes the starting index of this window to the index specified.
Returns the windows back to chain multiple calls to this method.
Panics
This method will panic if start is out of bounds for the underlying
slice or if it comes after the end configured in this window.
fn set_end(&mut self, end: usize) -> &mut Window<T>
Changes the end index of this window to the index specified.
Returns the windows back to chain multiple calls to this method.
Panics
This method will panic if end is out of bounds for the underlying
slice or if it comes before the start configured in this window.