Jon Häggblad
107 lines
3.0 KiB
Rust
107 lines
3.0 KiB
Rust
// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
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// SPDX-License-Identifier: Apache-2.0
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use futures::channel::mpsc;
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use std::collections::HashMap;
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pub type ConnectionId = u64;
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#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
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pub enum TransmissionLane {
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General,
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// we need to treat surb-related requests and responses at higher priority
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// so that the rest of underlying communication could actually continue
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ReplySurbRequest,
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AdditionalReplySurbs,
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Retransmission,
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ConnectionId(ConnectionId),
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}
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/// Used by the connection controller to report current state for client connections.
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pub type ConnectionCommandSender = mpsc::UnboundedSender<ConnectionCommand>;
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pub type ConnectionCommandReceiver = mpsc::UnboundedReceiver<ConnectionCommand>;
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pub enum ConnectionCommand {
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// Announce that at a connection was closed. E.g the `OutQueueControl` uses this to discard
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// transmission lanes.
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Close(ConnectionId),
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}
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// The `OutQueueControl` publishes the backlog per lane, primarily so that upstream can slow down
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// if needed.
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#[derive(Clone, Debug)]
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pub struct LaneQueueLengths(std::sync::Arc<std::sync::Mutex<LaneQueueLengthsInner>>);
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impl LaneQueueLengths {
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pub fn new() -> Self {
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LaneQueueLengths(std::sync::Arc::new(std::sync::Mutex::new(
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LaneQueueLengthsInner {
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map: HashMap::new(),
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},
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)))
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}
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pub fn set(&mut self, lane: &TransmissionLane, lane_length: Option<usize>) {
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match self.0.lock() {
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Ok(mut inner) => {
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if let Some(length) = lane_length {
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inner
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.map
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.entry(*lane)
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.and_modify(|e| *e = length)
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.or_insert(length);
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} else {
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inner.map.remove(lane);
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}
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}
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Err(err) => log::warn!("Failed to set lane queue length: {err}"),
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}
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}
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pub fn get(&self, lane: &TransmissionLane) -> Option<usize> {
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match self.0.lock() {
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Ok(inner) => inner.get(lane),
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Err(err) => {
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log::warn!("Failed to get lane queue length: {err}");
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None
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}
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}
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}
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}
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impl Default for LaneQueueLengths {
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fn default() -> Self {
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Self::new()
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}
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}
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impl std::ops::Deref for LaneQueueLengths {
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type Target = std::sync::Arc<std::sync::Mutex<LaneQueueLengthsInner>>;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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#[derive(Debug)]
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pub struct LaneQueueLengthsInner {
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pub map: HashMap<TransmissionLane, usize>,
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}
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impl LaneQueueLengthsInner {
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pub fn get(&self, lane: &TransmissionLane) -> Option<usize> {
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self.map.get(lane).copied()
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}
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pub fn values(&self) -> impl Iterator<Item = &usize> {
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self.map.values()
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}
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pub fn modify<F>(&mut self, lane: &TransmissionLane, f: F)
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where
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F: FnOnce(&mut usize),
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{
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self.map.entry(*lane).and_modify(f);
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}
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}
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