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"iovec",
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||||
"lazy_static",
|
||||
"libc",
|
||||
"memchr",
|
||||
"mio",
|
||||
"mio-named-pipes",
|
||||
"mio-uds",
|
||||
"num_cpus",
|
||||
"pin-project-lite 0.1.11",
|
||||
"signal-hook-registry",
|
||||
"slab",
|
||||
"tokio-macros",
|
||||
"winapi 0.3.9",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio-macros"
|
||||
version = "0.2.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e44da00bfc73a25f814cd8d7e57a68a5c31b74b3152a0a1d1f590c97ed06265a"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-xid"
|
||||
version = "0.2.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.2.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-build"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "ws2_32-sys"
|
||||
version = "0.2.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
|
||||
dependencies = [
|
||||
"winapi 0.2.8",
|
||||
"winapi-build",
|
||||
]
|
||||
@ -0,0 +1,12 @@
|
||||
[package]
|
||||
name = "dirstat"
|
||||
version = "0.1.0"
|
||||
authors = ["Avril <flanchan@cumallover.me>"]
|
||||
edition = "2018"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
futures = "0.3.12"
|
||||
pin-project = "1.0.5"
|
||||
tokio = {version = "0.2", features=["full"]}
|
||||
@ -0,0 +1,178 @@
|
||||
use super::*;
|
||||
use futures::prelude::*;
|
||||
use std::sync::atomic::{Ordering, AtomicBool};
|
||||
use std::mem;
|
||||
use tokio::time::{
|
||||
Duration,
|
||||
Interval,
|
||||
self,
|
||||
};
|
||||
use std::{
|
||||
pin::Pin,
|
||||
task::{Poll, Context},
|
||||
};
|
||||
|
||||
pub mod prelude
|
||||
{
|
||||
pub use super::StreamGateExt as _;
|
||||
pub use super::StreamLagExt as _;
|
||||
}
|
||||
|
||||
|
||||
/// A gated stream that releases every N items from the backing stream.
|
||||
#[pin_project]
|
||||
#[derive(Debug)]
|
||||
pub struct GatedStream<S,T>
|
||||
{
|
||||
#[pin] backing: stream::Fuse<S>,
|
||||
buffer: Vec<T>,
|
||||
release_at: usize,
|
||||
force_release: AtomicBool,
|
||||
}
|
||||
|
||||
/// A gated stream that also releases on a timeout.
|
||||
#[pin_project]
|
||||
#[derive(Debug)]
|
||||
pub struct TimedGatedStream<S, T>
|
||||
{
|
||||
#[pin] backing: GatedStream<S, T>,
|
||||
interval: Interval, // no need to Pin this, it's Unpin, we call `poll_next_unpin`.
|
||||
}
|
||||
|
||||
pub trait StreamLagExt: Sized
|
||||
{
|
||||
/// Throttle this stream with this duration.
|
||||
fn lag(self, timeout: Duration) -> time::Throttle<Self>;
|
||||
}
|
||||
|
||||
impl<S> StreamLagExt for S
|
||||
where S: Stream
|
||||
{
|
||||
#[inline] fn lag(self, timeout: Duration) -> time::Throttle<Self>
|
||||
{
|
||||
time::throttle(timeout, self)
|
||||
}
|
||||
}
|
||||
|
||||
pub trait StreamGateExt<T>: Sized
|
||||
{
|
||||
/// Gate this stream every `n` elements.
|
||||
///
|
||||
/// # Panics
|
||||
/// If `n` is 0.
|
||||
fn gate(self, n: usize) -> GatedStream<Self, T>;
|
||||
|
||||
/// Gate this stream every `n` elements or after `timeout` completes.
|
||||
///
|
||||
/// # Panics
|
||||
/// If `n` is 0.
|
||||
fn gate_with_timeout(self, n: usize, timeout: Duration) -> TimedGatedStream<Self, T>;
|
||||
}
|
||||
|
||||
impl<S> StreamGateExt<S::Item> for S
|
||||
where S: Stream,
|
||||
{
|
||||
fn gate(self, n: usize) -> GatedStream<Self, S::Item>
|
||||
{
|
||||
assert!(n > 0, "Size of gate must be above 0");
|
||||
GatedStream
|
||||
{
|
||||
backing: self.fuse(),
|
||||
buffer: Vec::with_capacity(n),
|
||||
release_at: n,
|
||||
force_release: AtomicBool::new(false),
|
||||
}
|
||||
}
|
||||
fn gate_with_timeout(self, n: usize, timeout: Duration) -> TimedGatedStream<Self, S::Item> {
|
||||
TimedGatedStream
|
||||
{
|
||||
backing: self.gate(n),
|
||||
interval: tokio::time::interval(timeout),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<S> GatedStream<S, S::Item>
|
||||
where S: Stream
|
||||
{
|
||||
/// Force release of next block whether its full or not
|
||||
pub fn force_release(&self)
|
||||
{
|
||||
self.force_release.store(true, Ordering::SeqCst);
|
||||
}
|
||||
|
||||
/// Consume into the inner stream and the current buffer.
|
||||
pub fn into_inner(self) -> (S, Vec<S::Item>)
|
||||
{
|
||||
(self.backing.into_inner(), self.buffer)
|
||||
}
|
||||
|
||||
/// Size of the gated block
|
||||
pub fn block_size(&self) -> usize
|
||||
{
|
||||
self.release_at
|
||||
}
|
||||
}
|
||||
impl<S> Stream for GatedStream<S, S::Item>
|
||||
where S: Stream
|
||||
{
|
||||
type Item = Box<[S::Item]>;
|
||||
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
|
||||
|
||||
while self.buffer.len() < self.release_at
|
||||
{
|
||||
let this = self.as_mut().project();
|
||||
match this.backing.poll_next(cx)
|
||||
{
|
||||
Poll::Pending => break,
|
||||
Poll::Ready(None) => {
|
||||
if this.buffer.len() == 0 {
|
||||
return Poll::Ready(None);
|
||||
}
|
||||
break;
|
||||
},
|
||||
Poll::Ready(Some(item)) => this.buffer.push(item),
|
||||
}
|
||||
}
|
||||
|
||||
if self.buffer.len() > 0 && self.force_release.load(Ordering::Acquire) {
|
||||
let this = self.project();
|
||||
let output = mem::replace(this.buffer, Vec::with_capacity(*this.release_at));
|
||||
this.force_release.store(false, Ordering::Release);
|
||||
Poll::Ready(Some(output.into()))
|
||||
}
|
||||
else if self.buffer.len() == self.release_at
|
||||
{
|
||||
let this = self.project();
|
||||
Poll::Ready(Some(mem::replace(this.buffer, Vec::with_capacity(*this.release_at)).into()))
|
||||
} else {
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
fn size_hint(&self) -> (usize, Option<usize>) {
|
||||
let bshint = self.backing.size_hint();
|
||||
(bshint.0 / self.release_at, bshint.1.map(|x| x / self.release_at))
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
impl<S> Stream for TimedGatedStream<S, S::Item>
|
||||
where S: Stream
|
||||
{
|
||||
type Item = Box<[S::Item]>;
|
||||
#[inline] fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
|
||||
let this = self.project();
|
||||
match this.interval.poll_next_unpin(cx)
|
||||
{
|
||||
Poll::Ready(_) => this.backing.force_release(),
|
||||
_ => (),
|
||||
}
|
||||
|
||||
this.backing.poll_next(cx)
|
||||
}
|
||||
#[inline] fn size_hint(&self) -> (usize, Option<usize>) {
|
||||
self.backing.size_hint()
|
||||
}
|
||||
}
|
||||
//TODO: impl Stream for TimedGatedStream
|
||||
//TODO: How to handle timeout for TimedGatedStream?
|
||||
@ -0,0 +1,10 @@
|
||||
|
||||
#[macro_use] extern crate pin_project;
|
||||
|
||||
mod ext;
|
||||
pub use ext::prelude::*;
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() {
|
||||
println!("Hello, world!");
|
||||
}
|
||||
Loading…
Reference in new issue