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make tokio dependency optional #160

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make tokio dependency optional #160

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8 changes: 6 additions & 2 deletions h3/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,8 @@ edition = "2018"
bytes = "1"
futures-util = { version = "0.3", default-features = false }
http = "0.2.3"
tokio = { version = "1", features = ["sync"] }
tokio = { version = "1", features = ["sync"], optional = true }
async-channel = { version = "1", optional = true }
tracing = "0.1.18"
fastrand = "1.7.0"

Expand All @@ -27,11 +28,14 @@ quinn = { version = "0.8.0", default-features = false, features = [
quinn-proto = { version = "0.8.0", default-features = false }
rcgen = "0.9"
rustls = "0.20"
tokio = { version = "1", features = ["rt", "macros", "io-util", "io-std"] }
tokio = { version = "1", features = ["rt", "macros", "io-util", "io-std", "sync"] }
tracing-subscriber = { version = "0.3", default-features = false, features = [
"fmt",
"ansi",
"env-filter",
"time",
"tracing-log",
] }

[features]
default = ["tokio"]
33 changes: 32 additions & 1 deletion h3/src/server.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,6 @@ use bytes::{Buf, BytesMut};
use futures_util::future;
use http::{response, HeaderMap, Request, Response, StatusCode};
use quic::StreamId;
use tokio::sync::mpsc;

use crate::{
connection::{self, ConnectionInner, ConnectionState, SharedStateRef},
Expand All @@ -74,6 +73,38 @@ use crate::{
};
use tracing::{error, trace, warn};

#[cfg(all(feature = "tokio", not(feature = "async-channel")))]
use tokio::sync::mpsc;

#[cfg(feature = "async-channel")]
mod mpsc {
use futures_util::StreamExt;
use std::task::{Context, Poll};

pub fn unbounded_channel<T>() -> (UnboundedSender<T>, UnboundedReceiver<T>) {
let (sender, receiver) = async_channel::unbounded();
(UnboundedSender(sender), UnboundedReceiver(receiver))
}

#[derive(Clone)]
pub struct UnboundedSender<T>(async_channel::Sender<T>);

impl<T> UnboundedSender<T> {
pub fn send(&self, msg: T) -> Result<(), async_channel::TrySendError<T>> {
self.0.try_send(msg)
}
}

#[derive(Clone)]
pub struct UnboundedReceiver<T>(async_channel::Receiver<T>);

impl<T> UnboundedReceiver<T> {
pub fn poll_recv(&mut self, cx: &mut Context) -> Poll<Option<T>> {
self.0.poll_next_unpin(cx)
}
}
}

/// Create a builder of HTTP/3 server connections
///
/// This function creates a [`Builder`] that carries settings that can
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