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#![doc(html_root_url = "https://docs.rs/tokio-util/0.4.0")]
#![allow(clippy::needless_doctest_main)]
#![warn(
missing_debug_implementations,
missing_docs,
rust_2018_idioms,
unreachable_pub
)]
#![cfg_attr(docsrs, deny(broken_intra_doc_links))]
#![doc(test(
no_crate_inject,
attr(deny(warnings, rust_2018_idioms), allow(dead_code, unused_variables))
))]
#![cfg_attr(docsrs, feature(doc_cfg))]
//! Utilities for working with Tokio.
//!
//! This crate is not versioned in lockstep with the core
//! [`tokio`] crate. However, `tokio-util` _will_ respect Rust's
//! semantic versioning policy, especially with regard to breaking changes.
//!
//! [`tokio`]: https://docs.rs/tokio
#[macro_use]
mod cfg;
mod loom;
cfg_codec! {
pub mod codec;
}
/*
Disabled due to removal of poll_ functions on UdpSocket.
See https://github.com/tokio-rs/tokio/issues/2830
cfg_udp! {
pub mod udp;
}
*/
cfg_compat! {
pub mod compat;
}
cfg_io! {
pub mod io;
}
cfg_rt! {
pub mod context;
}
pub mod sync;
pub mod either;
#[cfg(feature = "time")]
pub mod time;
#[cfg(any(feature = "io", feature = "codec"))]
mod util {
use tokio::io::{AsyncRead, ReadBuf};
use bytes::BufMut;
use futures_core::ready;
use std::io;
use std::pin::Pin;
use std::task::{Context, Poll};
pub(crate) fn poll_read_buf<T: AsyncRead>(
cx: &mut Context<'_>,
io: Pin<&mut T>,
buf: &mut impl BufMut,
) -> Poll<io::Result<usize>> {
if !buf.has_remaining_mut() {
return Poll::Ready(Ok(0));
}
let orig = buf.bytes_mut().as_ptr() as *const u8;
let mut b = ReadBuf::uninit(buf.bytes_mut());
ready!(io.poll_read(cx, &mut b))?;
let n = b.filled().len();
// Safety: we can assume `n` bytes were read, since they are in`filled`.
assert_eq!(orig, b.filled().as_ptr());
unsafe {
buf.advance_mut(n);
}
Poll::Ready(Ok(n))
}
}
|
