| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.26/src/client/pool.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>pool.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../hyper/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../hyper/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="750">750</span> |
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| <span id="756">756</span> |
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| <span id="761">761</span> |
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| <span id="922">922</span> |
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| <span id="926">926</span> |
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| <span id="930">930</span> |
| <span id="931">931</span> |
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| <span id="968">968</span> |
| <span id="969">969</span> |
| <span id="970">970</span> |
| <span id="971">971</span> |
| <span id="972">972</span> |
| <span id="973">973</span> |
| <span id="974">974</span> |
| <span id="975">975</span> |
| <span id="976">976</span> |
| <span id="977">977</span> |
| <span id="978">978</span> |
| <span id="979">979</span> |
| <span id="980">980</span> |
| <span id="981">981</span> |
| <span id="982">982</span> |
| <span id="983">983</span> |
| <span id="984">984</span> |
| <span id="985">985</span> |
| <span id="986">986</span> |
| <span id="987">987</span> |
| <span id="988">988</span> |
| <span id="989">989</span> |
| <span id="990">990</span> |
| <span id="991">991</span> |
| <span id="992">992</span> |
| <span id="993">993</span> |
| <span id="994">994</span> |
| <span id="995">995</span> |
| <span id="996">996</span> |
| <span id="997">997</span> |
| <span id="998">998</span> |
| <span id="999">999</span> |
| <span id="1000">1000</span> |
| <span id="1001">1001</span> |
| <span id="1002">1002</span> |
| <span id="1003">1003</span> |
| <span id="1004">1004</span> |
| <span id="1005">1005</span> |
| <span id="1006">1006</span> |
| <span id="1007">1007</span> |
| <span id="1008">1008</span> |
| <span id="1009">1009</span> |
| <span id="1010">1010</span> |
| <span id="1011">1011</span> |
| <span id="1012">1012</span> |
| <span id="1013">1013</span> |
| <span id="1014">1014</span> |
| <span id="1015">1015</span> |
| <span id="1016">1016</span> |
| <span id="1017">1017</span> |
| <span id="1018">1018</span> |
| <span id="1019">1019</span> |
| <span id="1020">1020</span> |
| <span id="1021">1021</span> |
| <span id="1022">1022</span> |
| <span id="1023">1023</span> |
| <span id="1024">1024</span> |
| <span id="1025">1025</span> |
| <span id="1026">1026</span> |
| <span id="1027">1027</span> |
| <span id="1028">1028</span> |
| <span id="1029">1029</span> |
| <span id="1030">1030</span> |
| <span id="1031">1031</span> |
| <span id="1032">1032</span> |
| <span id="1033">1033</span> |
| <span id="1034">1034</span> |
| <span id="1035">1035</span> |
| <span id="1036">1036</span> |
| <span id="1037">1037</span> |
| <span id="1038">1038</span> |
| <span id="1039">1039</span> |
| <span id="1040">1040</span> |
| <span id="1041">1041</span> |
| <span id="1042">1042</span> |
| <span id="1043">1043</span> |
| <span id="1044">1044</span> |
| </pre><pre class="rust"><code><span class="kw">use </span>std::collections::{HashMap, HashSet, VecDeque}; |
| <span class="kw">use </span>std::error::Error <span class="kw">as </span>StdError; |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::ops::{Deref, DerefMut}; |
| <span class="kw">use </span>std::sync::{Arc, Mutex, Weak}; |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"runtime"</span>))] |
| </span><span class="kw">use </span>std::time::{Duration, Instant}; |
| |
| <span class="kw">use </span>futures_channel::oneshot; |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span><span class="kw">use </span>tokio::time::{Duration, Instant, Interval}; |
| <span class="kw">use </span>tracing::{debug, trace}; |
| |
| <span class="kw">use </span><span class="kw">super</span>::client::Ver; |
| <span class="kw">use </span><span class="kw">crate</span>::common::{exec::Exec, task, Future, Pin, Poll, Unpin}; |
| |
| <span class="comment">// FIXME: allow() required due to `impl Trait` leaking types to this lint |
| </span><span class="attribute">#[allow(missing_debug_implementations)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Pool<T> { |
| <span class="comment">// If the pool is disabled, this is None. |
| </span>inner: <span class="prelude-ty">Option</span><Arc<Mutex<PoolInner<T>>>>, |
| } |
| |
| <span class="comment">// Before using a pooled connection, make sure the sender is not dead. |
| // |
| // This is a trait to allow the `client::pool::tests` to work for `i32`. |
| // |
| // See https://github.com/hyperium/hyper/issues/1429 |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">trait </span>Poolable: Unpin + Send + Sized + <span class="lifetime">'static </span>{ |
| <span class="kw">fn </span>is_open(<span class="kw-2">&</span><span class="self">self</span>) -> bool; |
| <span class="doccomment">/// Reserve this connection. |
| /// |
| /// Allows for HTTP/2 to return a shared reservation. |
| </span><span class="kw">fn </span>reserve(<span class="self">self</span>) -> Reservation<<span class="self">Self</span>>; |
| <span class="kw">fn </span>can_share(<span class="kw-2">&</span><span class="self">self</span>) -> bool; |
| } |
| |
| <span class="doccomment">/// When checking out a pooled connection, it might be that the connection |
| /// only supports a single reservation, or it might be usable for many. |
| /// |
| /// Specifically, HTTP/1 requires a unique reservation, but HTTP/2 can be |
| /// used for multiple requests. |
| </span><span class="comment">// FIXME: allow() required due to `impl Trait` leaking types to this lint |
| </span><span class="attribute">#[allow(missing_debug_implementations)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">enum </span>Reservation<T> { |
| <span class="doccomment">/// This connection could be used multiple times, the first one will be |
| /// reinserted into the `idle` pool, and the second will be given to |
| /// the `Checkout`. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"http2"</span>)] |
| </span>Shared(T, T), |
| <span class="doccomment">/// This connection requires unique access. It will be returned after |
| /// use is complete. |
| </span>Unique(T), |
| } |
| |
| <span class="doccomment">/// Simple type alias in case the key type needs to be adjusted. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">type </span>Key = (http::uri::Scheme, http::uri::Authority); <span class="comment">//Arc<String>; |
| |
| </span><span class="kw">struct </span>PoolInner<T> { |
| <span class="comment">// A flag that a connection is being established, and the connection |
| // should be shared. This prevents making multiple HTTP/2 connections |
| // to the same host. |
| </span>connecting: HashSet<Key>, |
| <span class="comment">// These are internal Conns sitting in the event loop in the KeepAlive |
| // state, waiting to receive a new Request to send on the socket. |
| </span>idle: HashMap<Key, Vec<Idle<T>>>, |
| max_idle_per_host: usize, |
| <span class="comment">// These are outstanding Checkouts that are waiting for a socket to be |
| // able to send a Request one. This is used when "racing" for a new |
| // connection. |
| // |
| // The Client starts 2 tasks, 1 to connect a new socket, and 1 to wait |
| // for the Pool to receive an idle Conn. When a Conn becomes idle, |
| // this list is checked for any parked Checkouts, and tries to notify |
| // them that the Conn could be used instead of waiting for a brand new |
| // connection. |
| </span>waiters: HashMap<Key, VecDeque<oneshot::Sender<T>>>, |
| <span class="comment">// A oneshot channel is used to allow the interval to be notified when |
| // the Pool completely drops. That way, the interval can cancel immediately. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>idle_interval_ref: <span class="prelude-ty">Option</span><oneshot::Sender<<span class="kw">crate</span>::common::Never>>, |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>exec: Exec, |
| timeout: <span class="prelude-ty">Option</span><Duration>, |
| } |
| |
| <span class="comment">// This is because `Weak::new()` *allocates* space for `T`, even if it |
| // doesn't need it! |
| </span><span class="kw">struct </span>WeakOpt<T>(<span class="prelude-ty">Option</span><Weak<T>>); |
| |
| <span class="attribute">#[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Config { |
| <span class="kw">pub</span>(<span class="kw">super</span>) idle_timeout: <span class="prelude-ty">Option</span><Duration>, |
| <span class="kw">pub</span>(<span class="kw">super</span>) max_idle_per_host: usize, |
| } |
| |
| <span class="kw">impl </span>Config { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_enabled(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.max_idle_per_host > <span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T> Pool<T> { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>new(config: Config, __exec: <span class="kw-2">&</span>Exec) -> Pool<T> { |
| <span class="kw">let </span>inner = <span class="kw">if </span>config.is_enabled() { |
| <span class="prelude-val">Some</span>(Arc::new(Mutex::new(PoolInner { |
| connecting: HashSet::new(), |
| idle: HashMap::new(), |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>idle_interval_ref: <span class="prelude-val">None</span>, |
| max_idle_per_host: config.max_idle_per_host, |
| waiters: HashMap::new(), |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>exec: __exec.clone(), |
| timeout: config.idle_timeout, |
| }))) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>}; |
| |
| Pool { inner } |
| } |
| |
| <span class="kw">fn </span>is_enabled(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.inner.is_some() |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>no_timer(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="comment">// Prevent an actual interval from being created for this pool... |
| </span><span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>inner = <span class="self">self</span>.inner.as_ref().unwrap().lock().unwrap(); |
| <span class="macro">assert!</span>(inner.idle_interval_ref.is_none(), <span class="string">"timer already spawned"</span>); |
| <span class="kw">let </span>(tx, <span class="kw">_</span>) = oneshot::channel(); |
| inner.idle_interval_ref = <span class="prelude-val">Some</span>(tx); |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Pool<T> { |
| <span class="doccomment">/// Returns a `Checkout` which is a future that resolves if an idle |
| /// connection becomes available. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>checkout(<span class="kw-2">&</span><span class="self">self</span>, key: Key) -> Checkout<T> { |
| Checkout { |
| key, |
| pool: <span class="self">self</span>.clone(), |
| waiter: <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Ensure that there is only ever 1 connecting task for HTTP/2 |
| /// connections. This does nothing for HTTP/1. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>connecting(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Key, ver: Ver) -> <span class="prelude-ty">Option</span><Connecting<T>> { |
| <span class="kw">if </span>ver == Ver::Http2 { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>enabled) = <span class="self">self</span>.inner { |
| <span class="kw">let </span><span class="kw-2">mut </span>inner = enabled.lock().unwrap(); |
| <span class="kw">return if </span>inner.connecting.insert(key.clone()) { |
| <span class="kw">let </span>connecting = Connecting { |
| key: key.clone(), |
| pool: WeakOpt::downgrade(enabled), |
| }; |
| <span class="prelude-val">Some</span>(connecting) |
| } <span class="kw">else </span>{ |
| <span class="macro">trace!</span>(<span class="string">"HTTP/2 connecting already in progress for {:?}"</span>, key); |
| <span class="prelude-val">None |
| </span>}; |
| } |
| } |
| |
| <span class="comment">// else |
| </span><span class="prelude-val">Some</span>(Connecting { |
| key: key.clone(), |
| <span class="comment">// in HTTP/1's case, there is never a lock, so we don't |
| // need to do anything in Drop. |
| </span>pool: WeakOpt::none(), |
| }) |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">fn </span>locked(<span class="kw-2">&</span><span class="self">self</span>) -> std::sync::MutexGuard<<span class="lifetime">'_</span>, PoolInner<T>> { |
| <span class="self">self</span>.inner.as_ref().expect(<span class="string">"enabled"</span>).lock().expect(<span class="string">"lock"</span>) |
| } |
| |
| <span class="comment">/* Used in client/tests.rs... |
| #[cfg(feature = "runtime")] |
| #[cfg(test)] |
| pub(super) fn h1_key(&self, s: &str) -> Key { |
| Arc::new(s.to_string()) |
| } |
| |
| #[cfg(feature = "runtime")] |
| #[cfg(test)] |
| pub(super) fn idle_count(&self, key: &Key) -> usize { |
| self |
| .locked() |
| .idle |
| .get(key) |
| .map(|list| list.len()) |
| .unwrap_or(0) |
| } |
| */ |
| |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>pooled( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| <span class="attribute">#[cfg_attr(not(feature = <span class="string">"http2"</span>), allow(unused_mut))] </span><span class="kw-2">mut </span>connecting: Connecting<T>, |
| value: T, |
| ) -> Pooled<T> { |
| <span class="kw">let </span>(value, pool_ref) = <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>enabled) = <span class="self">self</span>.inner { |
| <span class="kw">match </span>value.reserve() { |
| <span class="attribute">#[cfg(feature = <span class="string">"http2"</span>)] |
| </span>Reservation::Shared(to_insert, to_return) => { |
| <span class="kw">let </span><span class="kw-2">mut </span>inner = enabled.lock().unwrap(); |
| inner.put(connecting.key.clone(), to_insert, enabled); |
| <span class="comment">// Do this here instead of Drop for Connecting because we |
| // already have a lock, no need to lock the mutex twice. |
| </span>inner.connected(<span class="kw-2">&</span>connecting.key); |
| <span class="comment">// prevent the Drop of Connecting from repeating inner.connected() |
| </span>connecting.pool = WeakOpt::none(); |
| |
| <span class="comment">// Shared reservations don't need a reference to the pool, |
| // since the pool always keeps a copy. |
| </span>(to_return, WeakOpt::none()) |
| } |
| Reservation::Unique(value) => { |
| <span class="comment">// Unique reservations must take a reference to the pool |
| // since they hope to reinsert once the reservation is |
| // completed |
| </span>(value, WeakOpt::downgrade(enabled)) |
| } |
| } |
| } <span class="kw">else </span>{ |
| <span class="comment">// If pool is not enabled, skip all the things... |
| |
| // The Connecting should have had no pool ref |
| </span><span class="macro">debug_assert!</span>(connecting.pool.upgrade().is_none()); |
| |
| (value, WeakOpt::none()) |
| }; |
| Pooled { |
| key: connecting.key.clone(), |
| is_reused: <span class="bool-val">false</span>, |
| pool: pool_ref, |
| value: <span class="prelude-val">Some</span>(value), |
| } |
| } |
| |
| <span class="kw">fn </span>reuse(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Key, value: T) -> Pooled<T> { |
| <span class="macro">debug!</span>(<span class="string">"reuse idle connection for {:?}"</span>, key); |
| <span class="comment">// TODO: unhack this |
| // In Pool::pooled(), which is used for inserting brand new connections, |
| // there's some code that adjusts the pool reference taken depending |
| // on if the Reservation can be shared or is unique. By the time |
| // reuse() is called, the reservation has already been made, and |
| // we just have the final value, without knowledge of if this is |
| // unique or shared. So, the hack is to just assume Ver::Http2 means |
| // shared... :( |
| </span><span class="kw">let </span><span class="kw-2">mut </span>pool_ref = WeakOpt::none(); |
| <span class="kw">if </span>!value.can_share() { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>enabled) = <span class="self">self</span>.inner { |
| pool_ref = WeakOpt::downgrade(enabled); |
| } |
| } |
| |
| Pooled { |
| is_reused: <span class="bool-val">true</span>, |
| key: key.clone(), |
| pool: pool_ref, |
| value: <span class="prelude-val">Some</span>(value), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Pop off this list, looking for a usable connection that hasn't expired. |
| </span><span class="kw">struct </span>IdlePopper<<span class="lifetime">'a</span>, T> { |
| key: <span class="kw-2">&</span><span class="lifetime">'a </span>Key, |
| list: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Vec<Idle<T>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Poolable + <span class="lifetime">'a</span>> IdlePopper<<span class="lifetime">'a</span>, T> { |
| <span class="kw">fn </span>pop(<span class="self">self</span>, expiration: <span class="kw-2">&</span>Expiration) -> <span class="prelude-ty">Option</span><Idle<T>> { |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(entry) = <span class="self">self</span>.list.pop() { |
| <span class="comment">// If the connection has been closed, or is older than our idle |
| // timeout, simply drop it and keep looking... |
| </span><span class="kw">if </span>!entry.value.is_open() { |
| <span class="macro">trace!</span>(<span class="string">"removing closed connection for {:?}"</span>, <span class="self">self</span>.key); |
| <span class="kw">continue</span>; |
| } |
| <span class="comment">// TODO: Actually, since the `idle` list is pushed to the end always, |
| // that would imply that if *this* entry is expired, then anything |
| // "earlier" in the list would *have* to be expired also... Right? |
| // |
| // In that case, we could just break out of the loop and drop the |
| // whole list... |
| </span><span class="kw">if </span>expiration.expires(entry.idle_at) { |
| <span class="macro">trace!</span>(<span class="string">"removing expired connection for {:?}"</span>, <span class="self">self</span>.key); |
| <span class="kw">continue</span>; |
| } |
| |
| <span class="kw">let </span>value = <span class="kw">match </span>entry.value.reserve() { |
| <span class="attribute">#[cfg(feature = <span class="string">"http2"</span>)] |
| </span>Reservation::Shared(to_reinsert, to_checkout) => { |
| <span class="self">self</span>.list.push(Idle { |
| idle_at: Instant::now(), |
| value: to_reinsert, |
| }); |
| to_checkout |
| } |
| Reservation::Unique(unique) => unique, |
| }; |
| |
| <span class="kw">return </span><span class="prelude-val">Some</span>(Idle { |
| idle_at: entry.idle_at, |
| value, |
| }); |
| } |
| |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: Poolable> PoolInner<T> { |
| <span class="kw">fn </span>put(<span class="kw-2">&mut </span><span class="self">self</span>, key: Key, value: T, __pool_ref: <span class="kw-2">&</span>Arc<Mutex<PoolInner<T>>>) { |
| <span class="kw">if </span>value.can_share() && <span class="self">self</span>.idle.contains_key(<span class="kw-2">&</span>key) { |
| <span class="macro">trace!</span>(<span class="string">"put; existing idle HTTP/2 connection for {:?}"</span>, key); |
| <span class="kw">return</span>; |
| } |
| <span class="macro">trace!</span>(<span class="string">"put; add idle connection for {:?}"</span>, key); |
| <span class="kw">let </span><span class="kw-2">mut </span>remove_waiters = <span class="bool-val">false</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>value = <span class="prelude-val">Some</span>(value); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(waiters) = <span class="self">self</span>.waiters.get_mut(<span class="kw-2">&</span>key) { |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(tx) = waiters.pop_front() { |
| <span class="kw">if </span>!tx.is_canceled() { |
| <span class="kw">let </span>reserved = value.take().expect(<span class="string">"value already sent"</span>); |
| <span class="kw">let </span>reserved = <span class="kw">match </span>reserved.reserve() { |
| <span class="attribute">#[cfg(feature = <span class="string">"http2"</span>)] |
| </span>Reservation::Shared(to_keep, to_send) => { |
| value = <span class="prelude-val">Some</span>(to_keep); |
| to_send |
| } |
| Reservation::Unique(uniq) => uniq, |
| }; |
| <span class="kw">match </span>tx.send(reserved) { |
| <span class="prelude-val">Ok</span>(()) => { |
| <span class="kw">if </span>value.is_none() { |
| <span class="kw">break</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">continue</span>; |
| } |
| } |
| <span class="prelude-val">Err</span>(e) => { |
| value = <span class="prelude-val">Some</span>(e); |
| } |
| } |
| } |
| |
| <span class="macro">trace!</span>(<span class="string">"put; removing canceled waiter for {:?}"</span>, key); |
| } |
| remove_waiters = waiters.is_empty(); |
| } |
| <span class="kw">if </span>remove_waiters { |
| <span class="self">self</span>.waiters.remove(<span class="kw-2">&</span>key); |
| } |
| |
| <span class="kw">match </span>value { |
| <span class="prelude-val">Some</span>(value) => { |
| <span class="comment">// borrow-check scope... |
| </span>{ |
| <span class="kw">let </span>idle_list = <span class="self">self</span>.idle.entry(key.clone()).or_insert_with(Vec::new); |
| <span class="kw">if </span><span class="self">self</span>.max_idle_per_host <= idle_list.len() { |
| <span class="macro">trace!</span>(<span class="string">"max idle per host for {:?}, dropping connection"</span>, key); |
| <span class="kw">return</span>; |
| } |
| |
| <span class="macro">debug!</span>(<span class="string">"pooling idle connection for {:?}"</span>, key); |
| idle_list.push(Idle { |
| value, |
| idle_at: Instant::now(), |
| }); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span>{ |
| <span class="self">self</span>.spawn_idle_interval(__pool_ref); |
| } |
| } |
| <span class="prelude-val">None </span>=> <span class="macro">trace!</span>(<span class="string">"put; found waiter for {:?}"</span>, key), |
| } |
| } |
| |
| <span class="doccomment">/// A `Connecting` task is complete. Not necessarily successfully, |
| /// but the lock is going away, so clean up. |
| </span><span class="kw">fn </span>connected(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Key) { |
| <span class="kw">let </span>existed = <span class="self">self</span>.connecting.remove(key); |
| <span class="macro">debug_assert!</span>(existed, <span class="string">"Connecting dropped, key not in pool.connecting"</span>); |
| <span class="comment">// cancel any waiters. if there are any, it's because |
| // this Connecting task didn't complete successfully. |
| // those waiters would never receive a connection. |
| </span><span class="self">self</span>.waiters.remove(key); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span><span class="kw">fn </span>spawn_idle_interval(<span class="kw-2">&mut </span><span class="self">self</span>, pool_ref: <span class="kw-2">&</span>Arc<Mutex<PoolInner<T>>>) { |
| <span class="kw">let </span>(dur, rx) = { |
| <span class="kw">if </span><span class="self">self</span>.idle_interval_ref.is_some() { |
| <span class="kw">return</span>; |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(dur) = <span class="self">self</span>.timeout { |
| <span class="kw">let </span>(tx, rx) = oneshot::channel(); |
| <span class="self">self</span>.idle_interval_ref = <span class="prelude-val">Some</span>(tx); |
| (dur, rx) |
| } <span class="kw">else </span>{ |
| <span class="kw">return</span>; |
| } |
| }; |
| |
| <span class="kw">let </span>interval = IdleTask { |
| interval: tokio::time::interval(dur), |
| pool: WeakOpt::downgrade(pool_ref), |
| pool_drop_notifier: rx, |
| }; |
| |
| <span class="self">self</span>.exec.execute(interval); |
| } |
| } |
| |
| <span class="kw">impl</span><T> PoolInner<T> { |
| <span class="doccomment">/// Any `FutureResponse`s that were created will have made a `Checkout`, |
| /// and possibly inserted into the pool that it is waiting for an idle |
| /// connection. If a user ever dropped that future, we need to clean out |
| /// those parked senders. |
| </span><span class="kw">fn </span>clean_waiters(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Key) { |
| <span class="kw">let </span><span class="kw-2">mut </span>remove_waiters = <span class="bool-val">false</span>; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(waiters) = <span class="self">self</span>.waiters.get_mut(key) { |
| waiters.retain(|tx| !tx.is_canceled()); |
| remove_waiters = waiters.is_empty(); |
| } |
| <span class="kw">if </span>remove_waiters { |
| <span class="self">self</span>.waiters.remove(key); |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span><span class="kw">impl</span><T: Poolable> PoolInner<T> { |
| <span class="doccomment">/// This should *only* be called by the IdleTask |
| </span><span class="kw">fn </span>clear_expired(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>dur = <span class="self">self</span>.timeout.expect(<span class="string">"interval assumes timeout"</span>); |
| |
| <span class="kw">let </span>now = Instant::now(); |
| <span class="comment">//self.last_idle_check_at = now; |
| |
| </span><span class="self">self</span>.idle.retain(|key, values| { |
| values.retain(|entry| { |
| <span class="kw">if </span>!entry.value.is_open() { |
| <span class="macro">trace!</span>(<span class="string">"idle interval evicting closed for {:?}"</span>, key); |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="comment">// Avoid `Instant::sub` to avoid issues like rust-lang/rust#86470. |
| </span><span class="kw">if </span>now.saturating_duration_since(entry.idle_at) > dur { |
| <span class="macro">trace!</span>(<span class="string">"idle interval evicting expired for {:?}"</span>, key); |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="comment">// Otherwise, keep this value... |
| </span><span class="bool-val">true |
| </span>}); |
| |
| <span class="comment">// returning false evicts this key/val |
| </span>!values.is_empty() |
| }); |
| } |
| } |
| |
| <span class="kw">impl</span><T> Clone <span class="kw">for </span>Pool<T> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> Pool<T> { |
| Pool { |
| inner: <span class="self">self</span>.inner.clone(), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// A wrapped poolable value that tries to reinsert to the Pool on Drop. |
| </span><span class="comment">// Note: The bounds `T: Poolable` is needed for the Drop impl. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Pooled<T: Poolable> { |
| value: <span class="prelude-ty">Option</span><T>, |
| is_reused: bool, |
| key: Key, |
| pool: WeakOpt<Mutex<PoolInner<T>>>, |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Pooled<T> { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_reused(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.is_reused |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_pool_enabled(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.pool.<span class="number">0</span>.is_some() |
| } |
| |
| <span class="kw">fn </span>as_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>T { |
| <span class="self">self</span>.value.as_ref().expect(<span class="string">"not dropped"</span>) |
| } |
| |
| <span class="kw">fn </span>as_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>T { |
| <span class="self">self</span>.value.as_mut().expect(<span class="string">"not dropped"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Deref <span class="kw">for </span>Pooled<T> { |
| <span class="kw">type </span>Target = T; |
| <span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>T { |
| <span class="self">self</span>.as_ref() |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> DerefMut <span class="kw">for </span>Pooled<T> { |
| <span class="kw">fn </span>deref_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>T { |
| <span class="self">self</span>.as_mut() |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Drop <span class="kw">for </span>Pooled<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(value) = <span class="self">self</span>.value.take() { |
| <span class="kw">if </span>!value.is_open() { |
| <span class="comment">// If we *already* know the connection is done here, |
| // it shouldn't be re-inserted back into the pool. |
| </span><span class="kw">return</span>; |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(pool) = <span class="self">self</span>.pool.upgrade() { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>inner) = pool.lock() { |
| inner.put(<span class="self">self</span>.key.clone(), value, <span class="kw-2">&</span>pool); |
| } |
| } <span class="kw">else if </span>!value.can_share() { |
| <span class="macro">trace!</span>(<span class="string">"pool dropped, dropping pooled ({:?})"</span>, <span class="self">self</span>.key); |
| } |
| <span class="comment">// Ver::Http2 is already in the Pool (or dead), so we wouldn't |
| // have an actual reference to the Pool. |
| </span>} |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> fmt::Debug <span class="kw">for </span>Pooled<T> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_struct(<span class="string">"Pooled"</span>).field(<span class="string">"key"</span>, <span class="kw-2">&</span><span class="self">self</span>.key).finish() |
| } |
| } |
| |
| <span class="kw">struct </span>Idle<T> { |
| idle_at: Instant, |
| value: T, |
| } |
| |
| <span class="comment">// FIXME: allow() required due to `impl Trait` leaking types to this lint |
| </span><span class="attribute">#[allow(missing_debug_implementations)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Checkout<T> { |
| key: Key, |
| pool: Pool<T>, |
| waiter: <span class="prelude-ty">Option</span><oneshot::Receiver<T>>, |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>CheckoutIsClosedError; |
| |
| <span class="kw">impl </span>StdError <span class="kw">for </span>CheckoutIsClosedError {} |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>CheckoutIsClosedError { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.write_str(<span class="string">"checked out connection was closed"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Checkout<T> { |
| <span class="kw">fn </span>poll_waiter( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| ) -> Poll<<span class="prelude-ty">Option</span><<span class="kw">crate</span>::Result<Pooled<T>>>> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">mut </span>rx) = <span class="self">self</span>.waiter.take() { |
| <span class="kw">match </span>Pin::new(<span class="kw-2">&mut </span>rx).poll(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(value)) => { |
| <span class="kw">if </span>value.is_open() { |
| Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="self">self</span>.pool.reuse(<span class="kw-2">&</span><span class="self">self</span>.key, value)))) |
| } <span class="kw">else </span>{ |
| Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>( |
| <span class="kw">crate</span>::Error::new_canceled().with(CheckoutIsClosedError) |
| ))) |
| } |
| } |
| Poll::Pending => { |
| <span class="self">self</span>.waiter = <span class="prelude-val">Some</span>(rx); |
| Poll::Pending |
| } |
| Poll::Ready(<span class="prelude-val">Err</span>(_canceled)) => Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>( |
| <span class="kw">crate</span>::Error::new_canceled().with(<span class="string">"request has been canceled"</span>) |
| ))), |
| } |
| } <span class="kw">else </span>{ |
| Poll::Ready(<span class="prelude-val">None</span>) |
| } |
| } |
| |
| <span class="kw">fn </span>checkout(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>) -> <span class="prelude-ty">Option</span><Pooled<T>> { |
| <span class="kw">let </span>entry = { |
| <span class="kw">let </span><span class="kw-2">mut </span>inner = <span class="self">self</span>.pool.inner.as_ref()<span class="question-mark">?</span>.lock().unwrap(); |
| <span class="kw">let </span>expiration = Expiration::new(inner.timeout); |
| <span class="kw">let </span>maybe_entry = inner.idle.get_mut(<span class="kw-2">&</span><span class="self">self</span>.key).and_then(|list| { |
| <span class="macro">trace!</span>(<span class="string">"take? {:?}: expiration = {:?}"</span>, <span class="self">self</span>.key, expiration.<span class="number">0</span>); |
| <span class="comment">// A block to end the mutable borrow on list, |
| // so the map below can check is_empty() |
| </span>{ |
| <span class="kw">let </span>popper = IdlePopper { |
| key: <span class="kw-2">&</span><span class="self">self</span>.key, |
| list, |
| }; |
| popper.pop(<span class="kw-2">&</span>expiration) |
| } |
| .map(|e| (e, list.is_empty())) |
| }); |
| |
| <span class="kw">let </span>(entry, empty) = <span class="kw">if let </span><span class="prelude-val">Some</span>((e, empty)) = maybe_entry { |
| (<span class="prelude-val">Some</span>(e), empty) |
| } <span class="kw">else </span>{ |
| <span class="comment">// No entry found means nuke the list for sure. |
| </span>(<span class="prelude-val">None</span>, <span class="bool-val">true</span>) |
| }; |
| <span class="kw">if </span>empty { |
| <span class="comment">//TODO: This could be done with the HashMap::entry API instead. |
| </span>inner.idle.remove(<span class="kw-2">&</span><span class="self">self</span>.key); |
| } |
| |
| <span class="kw">if </span>entry.is_none() && <span class="self">self</span>.waiter.is_none() { |
| <span class="kw">let </span>(tx, <span class="kw-2">mut </span>rx) = oneshot::channel(); |
| <span class="macro">trace!</span>(<span class="string">"checkout waiting for idle connection: {:?}"</span>, <span class="self">self</span>.key); |
| inner |
| .waiters |
| .entry(<span class="self">self</span>.key.clone()) |
| .or_insert_with(VecDeque::new) |
| .push_back(tx); |
| |
| <span class="comment">// register the waker with this oneshot |
| </span><span class="macro">assert!</span>(Pin::new(<span class="kw-2">&mut </span>rx).poll(cx).is_pending()); |
| <span class="self">self</span>.waiter = <span class="prelude-val">Some</span>(rx); |
| } |
| |
| entry |
| }; |
| |
| entry.map(|e| <span class="self">self</span>.pool.reuse(<span class="kw-2">&</span><span class="self">self</span>.key, e.value)) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Future <span class="kw">for </span>Checkout<T> { |
| <span class="kw">type </span>Output = <span class="kw">crate</span>::Result<Pooled<T>>; |
| |
| <span class="kw">fn </span>poll(<span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(pooled) = <span class="macro">ready!</span>(<span class="self">self</span>.poll_waiter(cx)<span class="question-mark">?</span>) { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(pooled)); |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(pooled) = <span class="self">self</span>.checkout(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(pooled)) |
| } <span class="kw">else if </span>!<span class="self">self</span>.pool.is_enabled() { |
| Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_canceled().with(<span class="string">"pool is disabled"</span>))) |
| } <span class="kw">else </span>{ |
| <span class="comment">// There's a new waiter, already registered in self.checkout() |
| </span><span class="macro">debug_assert!</span>(<span class="self">self</span>.waiter.is_some()); |
| Poll::Pending |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> Drop <span class="kw">for </span>Checkout<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">if </span><span class="self">self</span>.waiter.take().is_some() { |
| <span class="macro">trace!</span>(<span class="string">"checkout dropped for {:?}"</span>, <span class="self">self</span>.key); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>inner)) = <span class="self">self</span>.pool.inner.as_ref().map(|i| i.lock()) { |
| inner.clean_waiters(<span class="kw-2">&</span><span class="self">self</span>.key); |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// FIXME: allow() required due to `impl Trait` leaking types to this lint |
| </span><span class="attribute">#[allow(missing_debug_implementations)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Connecting<T: Poolable> { |
| key: Key, |
| pool: WeakOpt<Mutex<PoolInner<T>>>, |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Connecting<T> { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>alpn_h2(<span class="self">self</span>, pool: <span class="kw-2">&</span>Pool<T>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> { |
| <span class="macro">debug_assert!</span>( |
| <span class="self">self</span>.pool.<span class="number">0</span>.is_none(), |
| <span class="string">"Connecting::alpn_h2 but already Http2" |
| </span>); |
| |
| pool.connecting(<span class="kw-2">&</span><span class="self">self</span>.key, Ver::Http2) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Poolable> Drop <span class="kw">for </span>Connecting<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(pool) = <span class="self">self</span>.pool.upgrade() { |
| <span class="comment">// No need to panic on drop, that could abort! |
| </span><span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>inner) = pool.lock() { |
| inner.connected(<span class="kw-2">&</span><span class="self">self</span>.key); |
| } |
| } |
| } |
| } |
| |
| <span class="kw">struct </span>Expiration(<span class="prelude-ty">Option</span><Duration>); |
| |
| <span class="kw">impl </span>Expiration { |
| <span class="kw">fn </span>new(dur: <span class="prelude-ty">Option</span><Duration>) -> Expiration { |
| Expiration(dur) |
| } |
| |
| <span class="kw">fn </span>expires(<span class="kw-2">&</span><span class="self">self</span>, instant: Instant) -> bool { |
| <span class="kw">match </span><span class="self">self</span>.<span class="number">0 </span>{ |
| <span class="comment">// Avoid `Instant::elapsed` to avoid issues like rust-lang/rust#86470. |
| </span><span class="prelude-val">Some</span>(timeout) => Instant::now().saturating_duration_since(instant) > timeout, |
| <span class="prelude-val">None </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span><span class="macro">pin_project_lite::pin_project! </span>{ |
| <span class="kw">struct </span>IdleTask<T> { |
| <span class="attribute">#[pin] |
| </span>interval: Interval, |
| pool: WeakOpt<Mutex<PoolInner<T>>>, |
| <span class="comment">// This allows the IdleTask to be notified as soon as the entire |
| // Pool is fully dropped, and shutdown. This channel is never sent on, |
| // but Err(Canceled) will be received when the Pool is dropped. |
| </span><span class="attribute">#[pin] |
| </span>pool_drop_notifier: oneshot::Receiver<<span class="kw">crate</span>::common::Never>, |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| </span><span class="kw">impl</span><T: Poolable + <span class="lifetime">'static</span>> Future <span class="kw">for </span>IdleTask<T> { |
| <span class="kw">type </span>Output = (); |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">let </span><span class="kw-2">mut </span>this = <span class="self">self</span>.project(); |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span>this.pool_drop_notifier.as_mut().poll(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(n)) => <span class="kw">match </span>n {}, |
| Poll::Pending => (), |
| Poll::Ready(<span class="prelude-val">Err</span>(_canceled)) => { |
| <span class="macro">trace!</span>(<span class="string">"pool closed, canceling idle interval"</span>); |
| <span class="kw">return </span>Poll::Ready(()); |
| } |
| } |
| |
| <span class="macro">ready!</span>(this.interval.as_mut().poll_tick(cx)); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(inner) = this.pool.upgrade() { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>inner) = inner.lock() { |
| <span class="macro">trace!</span>(<span class="string">"idle interval checking for expired"</span>); |
| inner.clear_expired(); |
| <span class="kw">continue</span>; |
| } |
| } |
| <span class="kw">return </span>Poll::Ready(()); |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> WeakOpt<T> { |
| <span class="kw">fn </span>none() -> <span class="self">Self </span>{ |
| WeakOpt(<span class="prelude-val">None</span>) |
| } |
| |
| <span class="kw">fn </span>downgrade(arc: <span class="kw-2">&</span>Arc<T>) -> <span class="self">Self </span>{ |
| WeakOpt(<span class="prelude-val">Some</span>(Arc::downgrade(arc))) |
| } |
| |
| <span class="kw">fn </span>upgrade(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Arc<T>> { |
| <span class="self">self</span>.<span class="number">0</span>.as_ref().and_then(Weak::upgrade) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span>std::task::Poll; |
| <span class="kw">use </span>std::time::Duration; |
| |
| <span class="kw">use super</span>::{Connecting, Key, Pool, Poolable, Reservation, WeakOpt}; |
| <span class="kw">use </span><span class="kw">crate</span>::common::{exec::Exec, task, Future, Pin}; |
| |
| <span class="doccomment">/// Test unique reservations. |
| </span><span class="attribute">#[derive(Debug, PartialEq, Eq)] |
| </span><span class="kw">struct </span>Uniq<T>(T); |
| |
| <span class="kw">impl</span><T: Send + <span class="lifetime">'static </span>+ Unpin> Poolable <span class="kw">for </span>Uniq<T> { |
| <span class="kw">fn </span>is_open(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="kw">fn </span>reserve(<span class="self">self</span>) -> Reservation<<span class="self">Self</span>> { |
| Reservation::Unique(<span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>can_share(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="kw">fn </span>c<T: Poolable>(key: Key) -> Connecting<T> { |
| Connecting { |
| key, |
| pool: WeakOpt::none(), |
| } |
| } |
| |
| <span class="kw">fn </span>host_key(s: <span class="kw-2">&</span>str) -> Key { |
| (http::uri::Scheme::HTTP, s.parse().expect(<span class="string">"host key"</span>)) |
| } |
| |
| <span class="kw">fn </span>pool_no_timer<T>() -> Pool<T> { |
| pool_max_idle_no_timer(::std::usize::MAX) |
| } |
| |
| <span class="kw">fn </span>pool_max_idle_no_timer<T>(max_idle: usize) -> Pool<T> { |
| <span class="kw">let </span>pool = Pool::new( |
| <span class="kw">super</span>::Config { |
| idle_timeout: <span class="prelude-val">Some</span>(Duration::from_millis(<span class="number">100</span>)), |
| max_idle_per_host: max_idle, |
| }, |
| <span class="kw-2">&</span>Exec::Default, |
| ); |
| pool.no_timer(); |
| pool |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_checkout_smoke() { |
| <span class="kw">let </span>pool = pool_no_timer(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| <span class="kw">let </span>pooled = pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| |
| drop(pooled); |
| |
| <span class="kw">match </span>pool.checkout(key).<span class="kw">await </span>{ |
| <span class="prelude-val">Ok</span>(pooled) => <span class="macro">assert_eq!</span>(<span class="kw-2">*</span>pooled, Uniq(<span class="number">41</span>)), |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"not ready"</span>), |
| }; |
| } |
| |
| <span class="doccomment">/// Helper to check if the future is ready after polling once. |
| </span><span class="kw">struct </span>PollOnce<<span class="lifetime">'a</span>, F>(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>F); |
| |
| <span class="kw">impl</span><F, T, U> Future <span class="kw">for </span>PollOnce<<span class="lifetime">'_</span>, F> |
| <span class="kw">where |
| </span>F: Future<Output = <span class="prelude-ty">Result</span><T, U>> + Unpin, |
| { |
| <span class="kw">type </span>Output = <span class="prelude-ty">Option</span><()>; |
| |
| <span class="kw">fn </span>poll(<span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">match </span>Pin::new(<span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>).poll(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(<span class="kw">_</span>)) => Poll::Ready(<span class="prelude-val">Some</span>(())), |
| Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">_</span>)) => Poll::Ready(<span class="prelude-val">Some</span>(())), |
| Poll::Pending => Poll::Ready(<span class="prelude-val">None</span>), |
| } |
| } |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_checkout_returns_none_if_expired() { |
| <span class="kw">let </span>pool = pool_no_timer(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| <span class="kw">let </span>pooled = pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| |
| drop(pooled); |
| tokio::time::sleep(pool.locked().timeout.unwrap()).<span class="kw">await</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>checkout = pool.checkout(key); |
| <span class="kw">let </span>poll_once = PollOnce(<span class="kw-2">&mut </span>checkout); |
| <span class="kw">let </span>is_not_ready = poll_once.<span class="kw">await</span>.is_none(); |
| <span class="macro">assert!</span>(is_not_ready); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| #[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_checkout_removes_expired() { |
| <span class="kw">let </span>pool = pool_no_timer(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| |
| pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">5</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">99</span>)); |
| |
| <span class="macro">assert_eq!</span>( |
| pool.locked().idle.get(<span class="kw-2">&</span>key).map(|entries| entries.len()), |
| <span class="prelude-val">Some</span>(<span class="number">3</span>) |
| ); |
| tokio::time::sleep(pool.locked().timeout.unwrap()).<span class="kw">await</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>checkout = pool.checkout(key.clone()); |
| <span class="kw">let </span>poll_once = PollOnce(<span class="kw-2">&mut </span>checkout); |
| <span class="comment">// checkout.await should clean out the expired |
| </span>poll_once.<span class="kw">await</span>; |
| <span class="macro">assert!</span>(pool.locked().idle.get(<span class="kw-2">&</span>key).is_none()); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_pool_max_idle_per_host() { |
| <span class="kw">let </span>pool = pool_max_idle_no_timer(<span class="number">2</span>); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| |
| pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">5</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">99</span>)); |
| |
| <span class="comment">// pooled and dropped 3, max_idle should only allow 2 |
| </span><span class="macro">assert_eq!</span>( |
| pool.locked().idle.get(<span class="kw-2">&</span>key).map(|entries| entries.len()), |
| <span class="prelude-val">Some</span>(<span class="number">2</span>) |
| ); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"runtime"</span>)] |
| #[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_timer_removes_expired() { |
| <span class="kw">let _ </span>= pretty_env_logger::try_init(); |
| tokio::time::pause(); |
| |
| <span class="kw">let </span>pool = Pool::new( |
| <span class="kw">super</span>::Config { |
| idle_timeout: <span class="prelude-val">Some</span>(Duration::from_millis(<span class="number">10</span>)), |
| max_idle_per_host: std::usize::MAX, |
| }, |
| <span class="kw-2">&</span>Exec::Default, |
| ); |
| |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| |
| pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">5</span>)); |
| pool.pooled(c(key.clone()), Uniq(<span class="number">99</span>)); |
| |
| <span class="macro">assert_eq!</span>( |
| pool.locked().idle.get(<span class="kw-2">&</span>key).map(|entries| entries.len()), |
| <span class="prelude-val">Some</span>(<span class="number">3</span>) |
| ); |
| |
| <span class="comment">// Let the timer tick passed the expiration... |
| </span>tokio::time::advance(Duration::from_millis(<span class="number">30</span>)).<span class="kw">await</span>; |
| <span class="comment">// Yield so the Interval can reap... |
| </span>tokio::task::yield_now().<span class="kw">await</span>; |
| |
| <span class="macro">assert!</span>(pool.locked().idle.get(<span class="kw-2">&</span>key).is_none()); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_checkout_task_unparked() { |
| <span class="kw">use </span>futures_util::future::join; |
| <span class="kw">use </span>futures_util::FutureExt; |
| |
| <span class="kw">let </span>pool = pool_no_timer(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| <span class="kw">let </span>pooled = pool.pooled(c(key.clone()), Uniq(<span class="number">41</span>)); |
| |
| <span class="kw">let </span>checkout = join(pool.checkout(key), <span class="kw">async </span>{ |
| <span class="comment">// the checkout future will park first, |
| // and then this lazy future will be polled, which will insert |
| // the pooled back into the pool |
| // |
| // this test makes sure that doing so will unpark the checkout |
| </span>drop(pooled); |
| }) |
| .map(|(entry, <span class="kw">_</span>)| entry); |
| |
| <span class="macro">assert_eq!</span>(<span class="kw-2">*</span>checkout.<span class="kw">await</span>.unwrap(), Uniq(<span class="number">41</span>)); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_pool_checkout_drop_cleans_up_waiters() { |
| <span class="kw">let </span>pool = pool_no_timer::<Uniq<i32>>(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>checkout1 = pool.checkout(key.clone()); |
| <span class="kw">let </span><span class="kw-2">mut </span>checkout2 = pool.checkout(key.clone()); |
| |
| <span class="kw">let </span>poll_once1 = PollOnce(<span class="kw-2">&mut </span>checkout1); |
| <span class="kw">let </span>poll_once2 = PollOnce(<span class="kw-2">&mut </span>checkout2); |
| |
| <span class="comment">// first poll needed to get into Pool's parked |
| </span>poll_once1.<span class="kw">await</span>; |
| <span class="macro">assert_eq!</span>(pool.locked().waiters.get(<span class="kw-2">&</span>key).unwrap().len(), <span class="number">1</span>); |
| poll_once2.<span class="kw">await</span>; |
| <span class="macro">assert_eq!</span>(pool.locked().waiters.get(<span class="kw-2">&</span>key).unwrap().len(), <span class="number">2</span>); |
| |
| <span class="comment">// on drop, clean up Pool |
| </span>drop(checkout1); |
| <span class="macro">assert_eq!</span>(pool.locked().waiters.get(<span class="kw-2">&</span>key).unwrap().len(), <span class="number">1</span>); |
| |
| drop(checkout2); |
| <span class="macro">assert!</span>(pool.locked().waiters.get(<span class="kw-2">&</span>key).is_none()); |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>CanClose { |
| <span class="attribute">#[allow(unused)] |
| </span>val: i32, |
| closed: bool, |
| } |
| |
| <span class="kw">impl </span>Poolable <span class="kw">for </span>CanClose { |
| <span class="kw">fn </span>is_open(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| !<span class="self">self</span>.closed |
| } |
| |
| <span class="kw">fn </span>reserve(<span class="self">self</span>) -> Reservation<<span class="self">Self</span>> { |
| Reservation::Unique(<span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>can_share(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>pooled_drop_if_closed_doesnt_reinsert() { |
| <span class="kw">let </span>pool = pool_no_timer(); |
| <span class="kw">let </span>key = host_key(<span class="string">"foo"</span>); |
| pool.pooled( |
| c(key.clone()), |
| CanClose { |
| val: <span class="number">57</span>, |
| closed: <span class="bool-val">true</span>, |
| }, |
| ); |
| |
| <span class="macro">assert!</span>(!pool.locked().idle.contains_key(<span class="kw-2">&</span>key)); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="hyper" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
