| <!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/crossbeam-channel-0.5.8/src/channel.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>channel.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="../../crossbeam_channel/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="../../crossbeam_channel/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="1523">1523</span> |
| <span id="1524">1524</span> |
| <span id="1525">1525</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! The channel interface. |
| |
| </span><span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::iter::FusedIterator; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::panic::{RefUnwindSafe, UnwindSafe}; |
| <span class="kw">use </span>std::sync::Arc; |
| <span class="kw">use </span>std::time::{Duration, Instant}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::context::Context; |
| <span class="kw">use </span><span class="kw">crate</span>::counter; |
| <span class="kw">use </span><span class="kw">crate</span>::err::{ |
| RecvError, RecvTimeoutError, SendError, SendTimeoutError, TryRecvError, TrySendError, |
| }; |
| <span class="kw">use </span><span class="kw">crate</span>::flavors; |
| <span class="kw">use </span><span class="kw">crate</span>::select::{Operation, SelectHandle, Token}; |
| |
| <span class="doccomment">/// Creates a channel of unbounded capacity. |
| /// |
| /// This channel has a growable buffer that can hold any number of messages at a time. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// // Computes the n-th Fibonacci number. |
| /// fn fib(n: i32) -> i32 { |
| /// if n <= 1 { |
| /// n |
| /// } else { |
| /// fib(n - 1) + fib(n - 2) |
| /// } |
| /// } |
| /// |
| /// // Spawn an asynchronous computation. |
| /// thread::spawn(move || s.send(fib(20)).unwrap()); |
| /// |
| /// // Print the result of the computation. |
| /// println!("{}", r.recv().unwrap()); |
| /// ``` |
| </span><span class="kw">pub fn </span>unbounded<T>() -> (Sender<T>, Receiver<T>) { |
| <span class="kw">let </span>(s, r) = counter::new(flavors::list::Channel::new()); |
| <span class="kw">let </span>s = Sender { |
| flavor: SenderFlavor::List(s), |
| }; |
| <span class="kw">let </span>r = Receiver { |
| flavor: ReceiverFlavor::List(r), |
| }; |
| (s, r) |
| } |
| |
| <span class="doccomment">/// Creates a channel of bounded capacity. |
| /// |
| /// This channel has a buffer that can hold at most `cap` messages at a time. |
| /// |
| /// A special case is zero-capacity channel, which cannot hold any messages. Instead, send and |
| /// receive operations must appear at the same time in order to pair up and pass the message over. |
| /// |
| /// # Examples |
| /// |
| /// A channel of capacity 1: |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::bounded; |
| /// |
| /// let (s, r) = bounded(1); |
| /// |
| /// // This call returns immediately because there is enough space in the channel. |
| /// s.send(1).unwrap(); |
| /// |
| /// thread::spawn(move || { |
| /// // This call blocks the current thread because the channel is full. |
| /// // It will be able to complete only after the first message is received. |
| /// s.send(2).unwrap(); |
| /// }); |
| /// |
| /// thread::sleep(Duration::from_secs(1)); |
| /// assert_eq!(r.recv(), Ok(1)); |
| /// assert_eq!(r.recv(), Ok(2)); |
| /// ``` |
| /// |
| /// A zero-capacity channel: |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::bounded; |
| /// |
| /// let (s, r) = bounded(0); |
| /// |
| /// thread::spawn(move || { |
| /// // This call blocks the current thread until a receive operation appears |
| /// // on the other side of the channel. |
| /// s.send(1).unwrap(); |
| /// }); |
| /// |
| /// thread::sleep(Duration::from_secs(1)); |
| /// assert_eq!(r.recv(), Ok(1)); |
| /// ``` |
| </span><span class="kw">pub fn </span>bounded<T>(cap: usize) -> (Sender<T>, Receiver<T>) { |
| <span class="kw">if </span>cap == <span class="number">0 </span>{ |
| <span class="kw">let </span>(s, r) = counter::new(flavors::zero::Channel::new()); |
| <span class="kw">let </span>s = Sender { |
| flavor: SenderFlavor::Zero(s), |
| }; |
| <span class="kw">let </span>r = Receiver { |
| flavor: ReceiverFlavor::Zero(r), |
| }; |
| (s, r) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>(s, r) = counter::new(flavors::array::Channel::with_capacity(cap)); |
| <span class="kw">let </span>s = Sender { |
| flavor: SenderFlavor::Array(s), |
| }; |
| <span class="kw">let </span>r = Receiver { |
| flavor: ReceiverFlavor::Array(r), |
| }; |
| (s, r) |
| } |
| } |
| |
| <span class="doccomment">/// Creates a receiver that delivers a message after a certain duration of time. |
| /// |
| /// The channel is bounded with capacity of 1 and never gets disconnected. Exactly one message will |
| /// be sent into the channel after `duration` elapses. The message is the instant at which it is |
| /// sent. |
| /// |
| /// # Examples |
| /// |
| /// Using an `after` channel for timeouts: |
| /// |
| /// ``` |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{after, select, unbounded}; |
| /// |
| /// let (s, r) = unbounded::<i32>(); |
| /// let timeout = Duration::from_millis(100); |
| /// |
| /// select! { |
| /// recv(r) -> msg => println!("received {:?}", msg), |
| /// recv(after(timeout)) -> _ => println!("timed out"), |
| /// } |
| /// ``` |
| /// |
| /// When the message gets sent: |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::{Duration, Instant}; |
| /// use crossbeam_channel::after; |
| /// |
| /// // Converts a number of milliseconds into a `Duration`. |
| /// let ms = |ms| Duration::from_millis(ms); |
| /// |
| /// // Returns `true` if `a` and `b` are very close `Instant`s. |
| /// let eq = |a, b| a + ms(60) > b && b + ms(60) > a; |
| /// |
| /// let start = Instant::now(); |
| /// let r = after(ms(100)); |
| /// |
| /// thread::sleep(ms(500)); |
| /// |
| /// // This message was sent 100 ms from the start and received 500 ms from the start. |
| /// assert!(eq(r.recv().unwrap(), start + ms(100))); |
| /// assert!(eq(Instant::now(), start + ms(500))); |
| /// ``` |
| </span><span class="kw">pub fn </span>after(duration: Duration) -> Receiver<Instant> { |
| <span class="kw">match </span>Instant::now().checked_add(duration) { |
| <span class="prelude-val">Some</span>(deadline) => Receiver { |
| flavor: ReceiverFlavor::At(Arc::new(flavors::at::Channel::new_deadline(deadline))), |
| }, |
| <span class="prelude-val">None </span>=> never(), |
| } |
| } |
| |
| <span class="doccomment">/// Creates a receiver that delivers a message at a certain instant in time. |
| /// |
| /// The channel is bounded with capacity of 1 and never gets disconnected. Exactly one message will |
| /// be sent into the channel at the moment in time `when`. The message is the instant at which it |
| /// is sent, which is the same as `when`. If `when` is in the past, the message will be delivered |
| /// instantly to the receiver. |
| /// |
| /// # Examples |
| /// |
| /// Using an `at` channel for timeouts: |
| /// |
| /// ``` |
| /// use std::time::{Instant, Duration}; |
| /// use crossbeam_channel::{at, select, unbounded}; |
| /// |
| /// let (s, r) = unbounded::<i32>(); |
| /// let deadline = Instant::now() + Duration::from_millis(500); |
| /// |
| /// select! { |
| /// recv(r) -> msg => println!("received {:?}", msg), |
| /// recv(at(deadline)) -> _ => println!("timed out"), |
| /// } |
| /// ``` |
| /// |
| /// When the message gets sent: |
| /// |
| /// ``` |
| /// use std::time::{Duration, Instant}; |
| /// use crossbeam_channel::at; |
| /// |
| /// // Converts a number of milliseconds into a `Duration`. |
| /// let ms = |ms| Duration::from_millis(ms); |
| /// |
| /// let start = Instant::now(); |
| /// let end = start + ms(100); |
| /// |
| /// let r = at(end); |
| /// |
| /// // This message was sent 100 ms from the start |
| /// assert_eq!(r.recv().unwrap(), end); |
| /// assert!(Instant::now() > start + ms(100)); |
| /// ``` |
| </span><span class="kw">pub fn </span>at(when: Instant) -> Receiver<Instant> { |
| Receiver { |
| flavor: ReceiverFlavor::At(Arc::new(flavors::at::Channel::new_deadline(when))), |
| } |
| } |
| |
| <span class="doccomment">/// Creates a receiver that never delivers messages. |
| /// |
| /// The channel is bounded with capacity of 0 and never gets disconnected. |
| /// |
| /// # Examples |
| /// |
| /// Using a `never` channel to optionally add a timeout to [`select!`]: |
| /// |
| /// [`select!`]: crate::select! |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{after, select, never, unbounded}; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(1).unwrap(); |
| /// }); |
| /// |
| /// // Suppose this duration can be a `Some` or a `None`. |
| /// let duration = Some(Duration::from_millis(100)); |
| /// |
| /// // Create a channel that times out after the specified duration. |
| /// let timeout = duration |
| /// .map(|d| after(d)) |
| /// .unwrap_or(never()); |
| /// |
| /// select! { |
| /// recv(r) -> msg => assert_eq!(msg, Ok(1)), |
| /// recv(timeout) -> _ => println!("timed out"), |
| /// } |
| /// ``` |
| </span><span class="kw">pub fn </span>never<T>() -> Receiver<T> { |
| Receiver { |
| flavor: ReceiverFlavor::Never(flavors::never::Channel::new()), |
| } |
| } |
| |
| <span class="doccomment">/// Creates a receiver that delivers messages periodically. |
| /// |
| /// The channel is bounded with capacity of 1 and never gets disconnected. Messages will be |
| /// sent into the channel in intervals of `duration`. Each message is the instant at which it is |
| /// sent. |
| /// |
| /// # Examples |
| /// |
| /// Using a `tick` channel to periodically print elapsed time: |
| /// |
| /// ``` |
| /// use std::time::{Duration, Instant}; |
| /// use crossbeam_channel::tick; |
| /// |
| /// let start = Instant::now(); |
| /// let ticker = tick(Duration::from_millis(100)); |
| /// |
| /// for _ in 0..5 { |
| /// ticker.recv().unwrap(); |
| /// println!("elapsed: {:?}", start.elapsed()); |
| /// } |
| /// ``` |
| /// |
| /// When messages get sent: |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::{Duration, Instant}; |
| /// use crossbeam_channel::tick; |
| /// |
| /// // Converts a number of milliseconds into a `Duration`. |
| /// let ms = |ms| Duration::from_millis(ms); |
| /// |
| /// // Returns `true` if `a` and `b` are very close `Instant`s. |
| /// let eq = |a, b| a + ms(65) > b && b + ms(65) > a; |
| /// |
| /// let start = Instant::now(); |
| /// let r = tick(ms(100)); |
| /// |
| /// // This message was sent 100 ms from the start and received 100 ms from the start. |
| /// assert!(eq(r.recv().unwrap(), start + ms(100))); |
| /// assert!(eq(Instant::now(), start + ms(100))); |
| /// |
| /// thread::sleep(ms(500)); |
| /// |
| /// // This message was sent 200 ms from the start and received 600 ms from the start. |
| /// assert!(eq(r.recv().unwrap(), start + ms(200))); |
| /// assert!(eq(Instant::now(), start + ms(600))); |
| /// |
| /// // This message was sent 700 ms from the start and received 700 ms from the start. |
| /// assert!(eq(r.recv().unwrap(), start + ms(700))); |
| /// assert!(eq(Instant::now(), start + ms(700))); |
| /// ``` |
| </span><span class="kw">pub fn </span>tick(duration: Duration) -> Receiver<Instant> { |
| <span class="kw">match </span>Instant::now().checked_add(duration) { |
| <span class="prelude-val">Some</span>(delivery_time) => Receiver { |
| flavor: ReceiverFlavor::Tick(Arc::new(flavors::tick::Channel::new( |
| delivery_time, |
| duration, |
| ))), |
| }, |
| <span class="prelude-val">None </span>=> never(), |
| } |
| } |
| |
| <span class="doccomment">/// The sending side of a channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s1, r) = unbounded(); |
| /// let s2 = s1.clone(); |
| /// |
| /// thread::spawn(move || s1.send(1).unwrap()); |
| /// thread::spawn(move || s2.send(2).unwrap()); |
| /// |
| /// let msg1 = r.recv().unwrap(); |
| /// let msg2 = r.recv().unwrap(); |
| /// |
| /// assert_eq!(msg1 + msg2, 3); |
| /// ``` |
| </span><span class="kw">pub struct </span>Sender<T> { |
| flavor: SenderFlavor<T>, |
| } |
| |
| <span class="doccomment">/// Sender flavors. |
| </span><span class="kw">enum </span>SenderFlavor<T> { |
| <span class="doccomment">/// Bounded channel based on a preallocated array. |
| </span>Array(counter::Sender<flavors::array::Channel<T>>), |
| |
| <span class="doccomment">/// Unbounded channel implemented as a linked list. |
| </span>List(counter::Sender<flavors::list::Channel<T>>), |
| |
| <span class="doccomment">/// Zero-capacity channel. |
| </span>Zero(counter::Sender<flavors::zero::Channel<T>>), |
| } |
| |
| <span class="kw">unsafe impl</span><T: Send> Send <span class="kw">for </span>Sender<T> {} |
| <span class="kw">unsafe impl</span><T: Send> Sync <span class="kw">for </span>Sender<T> {} |
| |
| <span class="kw">impl</span><T> UnwindSafe <span class="kw">for </span>Sender<T> {} |
| <span class="kw">impl</span><T> RefUnwindSafe <span class="kw">for </span>Sender<T> {} |
| |
| <span class="kw">impl</span><T> Sender<T> { |
| <span class="doccomment">/// Attempts to send a message into the channel without blocking. |
| /// |
| /// This method will either send a message into the channel immediately or return an error if |
| /// the channel is full or disconnected. The returned error contains the original message. |
| /// |
| /// If called on a zero-capacity channel, this method will send the message only if there |
| /// happens to be a receive operation on the other side of the channel at the same time. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::{bounded, TrySendError}; |
| /// |
| /// let (s, r) = bounded(1); |
| /// |
| /// assert_eq!(s.try_send(1), Ok(())); |
| /// assert_eq!(s.try_send(2), Err(TrySendError::Full(2))); |
| /// |
| /// drop(r); |
| /// assert_eq!(s.try_send(3), Err(TrySendError::Disconnected(3))); |
| /// ``` |
| </span><span class="kw">pub fn </span>try_send(<span class="kw-2">&</span><span class="self">self</span>, msg: T) -> <span class="prelude-ty">Result</span><(), TrySendError<T>> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.try_send(msg), |
| SenderFlavor::List(chan) => chan.try_send(msg), |
| SenderFlavor::Zero(chan) => chan.try_send(msg), |
| } |
| } |
| |
| <span class="doccomment">/// Blocks the current thread until a message is sent or the channel is disconnected. |
| /// |
| /// If the channel is full and not disconnected, this call will block until the send operation |
| /// can proceed. If the channel becomes disconnected, this call will wake up and return an |
| /// error. The returned error contains the original message. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a receive operation to |
| /// appear on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{bounded, SendError}; |
| /// |
| /// let (s, r) = bounded(1); |
| /// assert_eq!(s.send(1), Ok(())); |
| /// |
| /// thread::spawn(move || { |
| /// assert_eq!(r.recv(), Ok(1)); |
| /// thread::sleep(Duration::from_secs(1)); |
| /// drop(r); |
| /// }); |
| /// |
| /// assert_eq!(s.send(2), Ok(())); |
| /// assert_eq!(s.send(3), Err(SendError(3))); |
| /// ``` |
| </span><span class="kw">pub fn </span>send(<span class="kw-2">&</span><span class="self">self</span>, msg: T) -> <span class="prelude-ty">Result</span><(), SendError<T>> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.send(msg, <span class="prelude-val">None</span>), |
| SenderFlavor::List(chan) => chan.send(msg, <span class="prelude-val">None</span>), |
| SenderFlavor::Zero(chan) => chan.send(msg, <span class="prelude-val">None</span>), |
| } |
| .map_err(|err| <span class="kw">match </span>err { |
| SendTimeoutError::Disconnected(msg) => SendError(msg), |
| SendTimeoutError::Timeout(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(), |
| }) |
| } |
| |
| <span class="doccomment">/// Waits for a message to be sent into the channel, but only for a limited time. |
| /// |
| /// If the channel is full and not disconnected, this call will block until the send operation |
| /// can proceed or the operation times out. If the channel becomes disconnected, this call will |
| /// wake up and return an error. The returned error contains the original message. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a receive operation to |
| /// appear on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{bounded, SendTimeoutError}; |
| /// |
| /// let (s, r) = bounded(0); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// assert_eq!(r.recv(), Ok(2)); |
| /// drop(r); |
| /// }); |
| /// |
| /// assert_eq!( |
| /// s.send_timeout(1, Duration::from_millis(500)), |
| /// Err(SendTimeoutError::Timeout(1)), |
| /// ); |
| /// assert_eq!( |
| /// s.send_timeout(2, Duration::from_secs(1)), |
| /// Ok(()), |
| /// ); |
| /// assert_eq!( |
| /// s.send_timeout(3, Duration::from_millis(500)), |
| /// Err(SendTimeoutError::Disconnected(3)), |
| /// ); |
| /// ``` |
| </span><span class="kw">pub fn </span>send_timeout(<span class="kw-2">&</span><span class="self">self</span>, msg: T, timeout: Duration) -> <span class="prelude-ty">Result</span><(), SendTimeoutError<T>> { |
| <span class="kw">match </span>Instant::now().checked_add(timeout) { |
| <span class="prelude-val">Some</span>(deadline) => <span class="self">self</span>.send_deadline(msg, deadline), |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.send(msg).map_err(SendTimeoutError::from), |
| } |
| } |
| |
| <span class="doccomment">/// Waits for a message to be sent into the channel, but only until a given deadline. |
| /// |
| /// If the channel is full and not disconnected, this call will block until the send operation |
| /// can proceed or the operation times out. If the channel becomes disconnected, this call will |
| /// wake up and return an error. The returned error contains the original message. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a receive operation to |
| /// appear on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::{Duration, Instant}; |
| /// use crossbeam_channel::{bounded, SendTimeoutError}; |
| /// |
| /// let (s, r) = bounded(0); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// assert_eq!(r.recv(), Ok(2)); |
| /// drop(r); |
| /// }); |
| /// |
| /// let now = Instant::now(); |
| /// |
| /// assert_eq!( |
| /// s.send_deadline(1, now + Duration::from_millis(500)), |
| /// Err(SendTimeoutError::Timeout(1)), |
| /// ); |
| /// assert_eq!( |
| /// s.send_deadline(2, now + Duration::from_millis(1500)), |
| /// Ok(()), |
| /// ); |
| /// assert_eq!( |
| /// s.send_deadline(3, now + Duration::from_millis(2000)), |
| /// Err(SendTimeoutError::Disconnected(3)), |
| /// ); |
| /// ``` |
| </span><span class="kw">pub fn </span>send_deadline(<span class="kw-2">&</span><span class="self">self</span>, msg: T, deadline: Instant) -> <span class="prelude-ty">Result</span><(), SendTimeoutError<T>> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.send(msg, <span class="prelude-val">Some</span>(deadline)), |
| SenderFlavor::List(chan) => chan.send(msg, <span class="prelude-val">Some</span>(deadline)), |
| SenderFlavor::Zero(chan) => chan.send(msg, <span class="prelude-val">Some</span>(deadline)), |
| } |
| } |
| |
| <span class="doccomment">/// Returns `true` if the channel is empty. |
| /// |
| /// Note: Zero-capacity channels are always empty. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// assert!(s.is_empty()); |
| /// |
| /// s.send(0).unwrap(); |
| /// assert!(!s.is_empty()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.is_empty(), |
| SenderFlavor::List(chan) => chan.is_empty(), |
| SenderFlavor::Zero(chan) => chan.is_empty(), |
| } |
| } |
| |
| <span class="doccomment">/// Returns `true` if the channel is full. |
| /// |
| /// Note: Zero-capacity channels are always full. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::bounded; |
| /// |
| /// let (s, r) = bounded(1); |
| /// |
| /// assert!(!s.is_full()); |
| /// s.send(0).unwrap(); |
| /// assert!(s.is_full()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_full(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.is_full(), |
| SenderFlavor::List(chan) => chan.is_full(), |
| SenderFlavor::Zero(chan) => chan.is_full(), |
| } |
| } |
| |
| <span class="doccomment">/// Returns the number of messages in the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// assert_eq!(s.len(), 0); |
| /// |
| /// s.send(1).unwrap(); |
| /// s.send(2).unwrap(); |
| /// assert_eq!(s.len(), 2); |
| /// ``` |
| </span><span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.len(), |
| SenderFlavor::List(chan) => chan.len(), |
| SenderFlavor::Zero(chan) => chan.len(), |
| } |
| } |
| |
| <span class="doccomment">/// If the channel is bounded, returns its capacity. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::{bounded, unbounded}; |
| /// |
| /// let (s, _) = unbounded::<i32>(); |
| /// assert_eq!(s.capacity(), None); |
| /// |
| /// let (s, _) = bounded::<i32>(5); |
| /// assert_eq!(s.capacity(), Some(5)); |
| /// |
| /// let (s, _) = bounded::<i32>(0); |
| /// assert_eq!(s.capacity(), Some(0)); |
| /// ``` |
| </span><span class="kw">pub fn </span>capacity(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><usize> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.capacity(), |
| SenderFlavor::List(chan) => chan.capacity(), |
| SenderFlavor::Zero(chan) => chan.capacity(), |
| } |
| } |
| |
| <span class="doccomment">/// Returns `true` if senders belong to the same channel. |
| /// |
| /// # Examples |
| /// |
| /// ```rust |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, _) = unbounded::<usize>(); |
| /// |
| /// let s2 = s.clone(); |
| /// assert!(s.same_channel(&s2)); |
| /// |
| /// let (s3, _) = unbounded(); |
| /// assert!(!s.same_channel(&s3)); |
| /// ``` |
| </span><span class="kw">pub fn </span>same_channel(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Sender<T>) -> bool { |
| <span class="kw">match </span>(<span class="kw-2">&</span><span class="self">self</span>.flavor, <span class="kw-2">&</span>other.flavor) { |
| (SenderFlavor::Array(<span class="kw-2">ref </span>a), SenderFlavor::Array(<span class="kw-2">ref </span>b)) => a == b, |
| (SenderFlavor::List(<span class="kw-2">ref </span>a), SenderFlavor::List(<span class="kw-2">ref </span>b)) => a == b, |
| (SenderFlavor::Zero(<span class="kw-2">ref </span>a), SenderFlavor::Zero(<span class="kw-2">ref </span>b)) => a == b, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> Drop <span class="kw">for </span>Sender<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.release(|c| c.disconnect()), |
| SenderFlavor::List(chan) => chan.release(|c| c.disconnect_senders()), |
| SenderFlavor::Zero(chan) => chan.release(|c| c.disconnect()), |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> Clone <span class="kw">for </span>Sender<T> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>flavor = <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => SenderFlavor::Array(chan.acquire()), |
| SenderFlavor::List(chan) => SenderFlavor::List(chan.acquire()), |
| SenderFlavor::Zero(chan) => SenderFlavor::Zero(chan.acquire()), |
| }; |
| |
| Sender { flavor } |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>Sender<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.pad(<span class="string">"Sender { .. }"</span>) |
| } |
| } |
| |
| <span class="doccomment">/// The receiving side of a channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// let _ = s.send(1); |
| /// thread::sleep(Duration::from_secs(1)); |
| /// let _ = s.send(2); |
| /// }); |
| /// |
| /// assert_eq!(r.recv(), Ok(1)); // Received immediately. |
| /// assert_eq!(r.recv(), Ok(2)); // Received after 1 second. |
| /// ``` |
| </span><span class="kw">pub struct </span>Receiver<T> { |
| flavor: ReceiverFlavor<T>, |
| } |
| |
| <span class="doccomment">/// Receiver flavors. |
| </span><span class="kw">enum </span>ReceiverFlavor<T> { |
| <span class="doccomment">/// Bounded channel based on a preallocated array. |
| </span>Array(counter::Receiver<flavors::array::Channel<T>>), |
| |
| <span class="doccomment">/// Unbounded channel implemented as a linked list. |
| </span>List(counter::Receiver<flavors::list::Channel<T>>), |
| |
| <span class="doccomment">/// Zero-capacity channel. |
| </span>Zero(counter::Receiver<flavors::zero::Channel<T>>), |
| |
| <span class="doccomment">/// The after flavor. |
| </span>At(Arc<flavors::at::Channel>), |
| |
| <span class="doccomment">/// The tick flavor. |
| </span>Tick(Arc<flavors::tick::Channel>), |
| |
| <span class="doccomment">/// The never flavor. |
| </span>Never(flavors::never::Channel<T>), |
| } |
| |
| <span class="kw">unsafe impl</span><T: Send> Send <span class="kw">for </span>Receiver<T> {} |
| <span class="kw">unsafe impl</span><T: Send> Sync <span class="kw">for </span>Receiver<T> {} |
| |
| <span class="kw">impl</span><T> UnwindSafe <span class="kw">for </span>Receiver<T> {} |
| <span class="kw">impl</span><T> RefUnwindSafe <span class="kw">for </span>Receiver<T> {} |
| |
| <span class="kw">impl</span><T> Receiver<T> { |
| <span class="doccomment">/// Attempts to receive a message from the channel without blocking. |
| /// |
| /// This method will either receive a message from the channel immediately or return an error |
| /// if the channel is empty. |
| /// |
| /// If called on a zero-capacity channel, this method will receive a message only if there |
| /// happens to be a send operation on the other side of the channel at the same time. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::{unbounded, TryRecvError}; |
| /// |
| /// let (s, r) = unbounded(); |
| /// assert_eq!(r.try_recv(), Err(TryRecvError::Empty)); |
| /// |
| /// s.send(5).unwrap(); |
| /// drop(s); |
| /// |
| /// assert_eq!(r.try_recv(), Ok(5)); |
| /// assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected)); |
| /// ``` |
| </span><span class="kw">pub fn </span>try_recv(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><T, TryRecvError> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.try_recv(), |
| ReceiverFlavor::List(chan) => chan.try_recv(), |
| ReceiverFlavor::Zero(chan) => chan.try_recv(), |
| ReceiverFlavor::At(chan) => { |
| <span class="kw">let </span>msg = chan.try_recv(); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::<<span class="prelude-ty">Result</span><Instant, TryRecvError>, <span class="prelude-ty">Result</span><T, TryRecvError>>( |
| <span class="kw-2">&</span>msg, |
| ) |
| } |
| } |
| ReceiverFlavor::Tick(chan) => { |
| <span class="kw">let </span>msg = chan.try_recv(); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::<<span class="prelude-ty">Result</span><Instant, TryRecvError>, <span class="prelude-ty">Result</span><T, TryRecvError>>( |
| <span class="kw-2">&</span>msg, |
| ) |
| } |
| } |
| ReceiverFlavor::Never(chan) => chan.try_recv(), |
| } |
| } |
| |
| <span class="doccomment">/// Blocks the current thread until a message is received or the channel is empty and |
| /// disconnected. |
| /// |
| /// If the channel is empty and not disconnected, this call will block until the receive |
| /// operation can proceed. If the channel is empty and becomes disconnected, this call will |
| /// wake up and return an error. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a send operation to appear |
| /// on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{unbounded, RecvError}; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(5).unwrap(); |
| /// drop(s); |
| /// }); |
| /// |
| /// assert_eq!(r.recv(), Ok(5)); |
| /// assert_eq!(r.recv(), Err(RecvError)); |
| /// ``` |
| </span><span class="kw">pub fn </span>recv(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><T, RecvError> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.recv(<span class="prelude-val">None</span>), |
| ReceiverFlavor::List(chan) => chan.recv(<span class="prelude-val">None</span>), |
| ReceiverFlavor::Zero(chan) => chan.recv(<span class="prelude-val">None</span>), |
| ReceiverFlavor::At(chan) => { |
| <span class="kw">let </span>msg = chan.recv(<span class="prelude-val">None</span>); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::< |
| <span class="prelude-ty">Result</span><Instant, RecvTimeoutError>, |
| <span class="prelude-ty">Result</span><T, RecvTimeoutError>, |
| >(<span class="kw-2">&</span>msg) |
| } |
| } |
| ReceiverFlavor::Tick(chan) => { |
| <span class="kw">let </span>msg = chan.recv(<span class="prelude-val">None</span>); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::< |
| <span class="prelude-ty">Result</span><Instant, RecvTimeoutError>, |
| <span class="prelude-ty">Result</span><T, RecvTimeoutError>, |
| >(<span class="kw-2">&</span>msg) |
| } |
| } |
| ReceiverFlavor::Never(chan) => chan.recv(<span class="prelude-val">None</span>), |
| } |
| .map_err(|<span class="kw">_</span>| RecvError) |
| } |
| |
| <span class="doccomment">/// Waits for a message to be received from the channel, but only for a limited time. |
| /// |
| /// If the channel is empty and not disconnected, this call will block until the receive |
| /// operation can proceed or the operation times out. If the channel is empty and becomes |
| /// disconnected, this call will wake up and return an error. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a send operation to appear |
| /// on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::{unbounded, RecvTimeoutError}; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(5).unwrap(); |
| /// drop(s); |
| /// }); |
| /// |
| /// assert_eq!( |
| /// r.recv_timeout(Duration::from_millis(500)), |
| /// Err(RecvTimeoutError::Timeout), |
| /// ); |
| /// assert_eq!( |
| /// r.recv_timeout(Duration::from_secs(1)), |
| /// Ok(5), |
| /// ); |
| /// assert_eq!( |
| /// r.recv_timeout(Duration::from_secs(1)), |
| /// Err(RecvTimeoutError::Disconnected), |
| /// ); |
| /// ``` |
| </span><span class="kw">pub fn </span>recv_timeout(<span class="kw-2">&</span><span class="self">self</span>, timeout: Duration) -> <span class="prelude-ty">Result</span><T, RecvTimeoutError> { |
| <span class="kw">match </span>Instant::now().checked_add(timeout) { |
| <span class="prelude-val">Some</span>(deadline) => <span class="self">self</span>.recv_deadline(deadline), |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.recv().map_err(RecvTimeoutError::from), |
| } |
| } |
| |
| <span class="doccomment">/// Waits for a message to be received from the channel, but only before a given deadline. |
| /// |
| /// If the channel is empty and not disconnected, this call will block until the receive |
| /// operation can proceed or the operation times out. If the channel is empty and becomes |
| /// disconnected, this call will wake up and return an error. |
| /// |
| /// If called on a zero-capacity channel, this method will wait for a send operation to appear |
| /// on the other side of the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::{Instant, Duration}; |
| /// use crossbeam_channel::{unbounded, RecvTimeoutError}; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(5).unwrap(); |
| /// drop(s); |
| /// }); |
| /// |
| /// let now = Instant::now(); |
| /// |
| /// assert_eq!( |
| /// r.recv_deadline(now + Duration::from_millis(500)), |
| /// Err(RecvTimeoutError::Timeout), |
| /// ); |
| /// assert_eq!( |
| /// r.recv_deadline(now + Duration::from_millis(1500)), |
| /// Ok(5), |
| /// ); |
| /// assert_eq!( |
| /// r.recv_deadline(now + Duration::from_secs(5)), |
| /// Err(RecvTimeoutError::Disconnected), |
| /// ); |
| /// ``` |
| </span><span class="kw">pub fn </span>recv_deadline(<span class="kw-2">&</span><span class="self">self</span>, deadline: Instant) -> <span class="prelude-ty">Result</span><T, RecvTimeoutError> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.recv(<span class="prelude-val">Some</span>(deadline)), |
| ReceiverFlavor::List(chan) => chan.recv(<span class="prelude-val">Some</span>(deadline)), |
| ReceiverFlavor::Zero(chan) => chan.recv(<span class="prelude-val">Some</span>(deadline)), |
| ReceiverFlavor::At(chan) => { |
| <span class="kw">let </span>msg = chan.recv(<span class="prelude-val">Some</span>(deadline)); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::< |
| <span class="prelude-ty">Result</span><Instant, RecvTimeoutError>, |
| <span class="prelude-ty">Result</span><T, RecvTimeoutError>, |
| >(<span class="kw-2">&</span>msg) |
| } |
| } |
| ReceiverFlavor::Tick(chan) => { |
| <span class="kw">let </span>msg = chan.recv(<span class="prelude-val">Some</span>(deadline)); |
| <span class="kw">unsafe </span>{ |
| mem::transmute_copy::< |
| <span class="prelude-ty">Result</span><Instant, RecvTimeoutError>, |
| <span class="prelude-ty">Result</span><T, RecvTimeoutError>, |
| >(<span class="kw-2">&</span>msg) |
| } |
| } |
| ReceiverFlavor::Never(chan) => chan.recv(<span class="prelude-val">Some</span>(deadline)), |
| } |
| } |
| |
| <span class="doccomment">/// Returns `true` if the channel is empty. |
| /// |
| /// Note: Zero-capacity channels are always empty. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// assert!(r.is_empty()); |
| /// s.send(0).unwrap(); |
| /// assert!(!r.is_empty()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.is_empty(), |
| ReceiverFlavor::List(chan) => chan.is_empty(), |
| ReceiverFlavor::Zero(chan) => chan.is_empty(), |
| ReceiverFlavor::At(chan) => chan.is_empty(), |
| ReceiverFlavor::Tick(chan) => chan.is_empty(), |
| ReceiverFlavor::Never(chan) => chan.is_empty(), |
| } |
| } |
| |
| <span class="doccomment">/// Returns `true` if the channel is full. |
| /// |
| /// Note: Zero-capacity channels are always full. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::bounded; |
| /// |
| /// let (s, r) = bounded(1); |
| /// |
| /// assert!(!r.is_full()); |
| /// s.send(0).unwrap(); |
| /// assert!(r.is_full()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_full(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.is_full(), |
| ReceiverFlavor::List(chan) => chan.is_full(), |
| ReceiverFlavor::Zero(chan) => chan.is_full(), |
| ReceiverFlavor::At(chan) => chan.is_full(), |
| ReceiverFlavor::Tick(chan) => chan.is_full(), |
| ReceiverFlavor::Never(chan) => chan.is_full(), |
| } |
| } |
| |
| <span class="doccomment">/// Returns the number of messages in the channel. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// assert_eq!(r.len(), 0); |
| /// |
| /// s.send(1).unwrap(); |
| /// s.send(2).unwrap(); |
| /// assert_eq!(r.len(), 2); |
| /// ``` |
| </span><span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.len(), |
| ReceiverFlavor::List(chan) => chan.len(), |
| ReceiverFlavor::Zero(chan) => chan.len(), |
| ReceiverFlavor::At(chan) => chan.len(), |
| ReceiverFlavor::Tick(chan) => chan.len(), |
| ReceiverFlavor::Never(chan) => chan.len(), |
| } |
| } |
| |
| <span class="doccomment">/// If the channel is bounded, returns its capacity. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_channel::{bounded, unbounded}; |
| /// |
| /// let (_, r) = unbounded::<i32>(); |
| /// assert_eq!(r.capacity(), None); |
| /// |
| /// let (_, r) = bounded::<i32>(5); |
| /// assert_eq!(r.capacity(), Some(5)); |
| /// |
| /// let (_, r) = bounded::<i32>(0); |
| /// assert_eq!(r.capacity(), Some(0)); |
| /// ``` |
| </span><span class="kw">pub fn </span>capacity(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><usize> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.capacity(), |
| ReceiverFlavor::List(chan) => chan.capacity(), |
| ReceiverFlavor::Zero(chan) => chan.capacity(), |
| ReceiverFlavor::At(chan) => chan.capacity(), |
| ReceiverFlavor::Tick(chan) => chan.capacity(), |
| ReceiverFlavor::Never(chan) => chan.capacity(), |
| } |
| } |
| |
| <span class="doccomment">/// A blocking iterator over messages in the channel. |
| /// |
| /// Each call to [`next`] blocks waiting for the next message and then returns it. However, if |
| /// the channel becomes empty and disconnected, it returns [`None`] without blocking. |
| /// |
| /// [`next`]: Iterator::next |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// s.send(1).unwrap(); |
| /// s.send(2).unwrap(); |
| /// s.send(3).unwrap(); |
| /// drop(s); // Disconnect the channel. |
| /// }); |
| /// |
| /// // Collect all messages from the channel. |
| /// // Note that the call to `collect` blocks until the sender is dropped. |
| /// let v: Vec<_> = r.iter().collect(); |
| /// |
| /// assert_eq!(v, [1, 2, 3]); |
| /// ``` |
| </span><span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> Iter<<span class="lifetime">'_</span>, T> { |
| Iter { receiver: <span class="self">self </span>} |
| } |
| |
| <span class="doccomment">/// A non-blocking iterator over messages in the channel. |
| /// |
| /// Each call to [`next`] returns a message if there is one ready to be received. The iterator |
| /// never blocks waiting for the next message. |
| /// |
| /// [`next`]: Iterator::next |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded::<i32>(); |
| /// |
| /// thread::spawn(move || { |
| /// s.send(1).unwrap(); |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(2).unwrap(); |
| /// thread::sleep(Duration::from_secs(2)); |
| /// s.send(3).unwrap(); |
| /// }); |
| /// |
| /// thread::sleep(Duration::from_secs(2)); |
| /// |
| /// // Collect all messages from the channel without blocking. |
| /// // The third message hasn't been sent yet so we'll collect only the first two. |
| /// let v: Vec<_> = r.try_iter().collect(); |
| /// |
| /// assert_eq!(v, [1, 2]); |
| /// ``` |
| </span><span class="kw">pub fn </span>try_iter(<span class="kw-2">&</span><span class="self">self</span>) -> TryIter<<span class="lifetime">'_</span>, T> { |
| TryIter { receiver: <span class="self">self </span>} |
| } |
| |
| <span class="doccomment">/// Returns `true` if receivers belong to the same channel. |
| /// |
| /// # Examples |
| /// |
| /// ```rust |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (_, r) = unbounded::<usize>(); |
| /// |
| /// let r2 = r.clone(); |
| /// assert!(r.same_channel(&r2)); |
| /// |
| /// let (_, r3) = unbounded(); |
| /// assert!(!r.same_channel(&r3)); |
| /// ``` |
| </span><span class="kw">pub fn </span>same_channel(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Receiver<T>) -> bool { |
| <span class="kw">match </span>(<span class="kw-2">&</span><span class="self">self</span>.flavor, <span class="kw-2">&</span>other.flavor) { |
| (ReceiverFlavor::Array(a), ReceiverFlavor::Array(b)) => a == b, |
| (ReceiverFlavor::List(a), ReceiverFlavor::List(b)) => a == b, |
| (ReceiverFlavor::Zero(a), ReceiverFlavor::Zero(b)) => a == b, |
| (ReceiverFlavor::At(a), ReceiverFlavor::At(b)) => Arc::ptr_eq(a, b), |
| (ReceiverFlavor::Tick(a), ReceiverFlavor::Tick(b)) => Arc::ptr_eq(a, b), |
| (ReceiverFlavor::Never(<span class="kw">_</span>), ReceiverFlavor::Never(<span class="kw">_</span>)) => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> Drop <span class="kw">for </span>Receiver<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.release(|c| c.disconnect()), |
| ReceiverFlavor::List(chan) => chan.release(|c| c.disconnect_receivers()), |
| ReceiverFlavor::Zero(chan) => chan.release(|c| c.disconnect()), |
| ReceiverFlavor::At(<span class="kw">_</span>) => {} |
| ReceiverFlavor::Tick(<span class="kw">_</span>) => {} |
| ReceiverFlavor::Never(<span class="kw">_</span>) => {} |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> Clone <span class="kw">for </span>Receiver<T> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>flavor = <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => ReceiverFlavor::Array(chan.acquire()), |
| ReceiverFlavor::List(chan) => ReceiverFlavor::List(chan.acquire()), |
| ReceiverFlavor::Zero(chan) => ReceiverFlavor::Zero(chan.acquire()), |
| ReceiverFlavor::At(chan) => ReceiverFlavor::At(chan.clone()), |
| ReceiverFlavor::Tick(chan) => ReceiverFlavor::Tick(chan.clone()), |
| ReceiverFlavor::Never(<span class="kw">_</span>) => ReceiverFlavor::Never(flavors::never::Channel::new()), |
| }; |
| |
| Receiver { flavor } |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>Receiver<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.pad(<span class="string">"Receiver { .. }"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>Receiver<T> { |
| <span class="kw">type </span>Item = T; |
| <span class="kw">type </span>IntoIter = Iter<<span class="lifetime">'a</span>, T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| <span class="self">self</span>.iter() |
| } |
| } |
| |
| <span class="kw">impl</span><T> IntoIterator <span class="kw">for </span>Receiver<T> { |
| <span class="kw">type </span>Item = T; |
| <span class="kw">type </span>IntoIter = IntoIter<T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| IntoIter { receiver: <span class="self">self </span>} |
| } |
| } |
| |
| <span class="doccomment">/// A blocking iterator over messages in a channel. |
| /// |
| /// Each call to [`next`] blocks waiting for the next message and then returns it. However, if the |
| /// channel becomes empty and disconnected, it returns [`None`] without blocking. |
| /// |
| /// [`next`]: Iterator::next |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// s.send(1).unwrap(); |
| /// s.send(2).unwrap(); |
| /// s.send(3).unwrap(); |
| /// drop(s); // Disconnect the channel. |
| /// }); |
| /// |
| /// // Collect all messages from the channel. |
| /// // Note that the call to `collect` blocks until the sender is dropped. |
| /// let v: Vec<_> = r.iter().collect(); |
| /// |
| /// assert_eq!(v, [1, 2, 3]); |
| /// ``` |
| </span><span class="kw">pub struct </span>Iter<<span class="lifetime">'a</span>, T> { |
| receiver: <span class="kw-2">&</span><span class="lifetime">'a </span>Receiver<T>, |
| } |
| |
| <span class="kw">impl</span><T> FusedIterator <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, T> {} |
| |
| <span class="kw">impl</span><T> Iterator <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, T> { |
| <span class="kw">type </span>Item = T; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="self">self</span>.receiver.recv().ok() |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, 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.pad(<span class="string">"Iter { .. }"</span>) |
| } |
| } |
| |
| <span class="doccomment">/// A non-blocking iterator over messages in a channel. |
| /// |
| /// Each call to [`next`] returns a message if there is one ready to be received. The iterator |
| /// never blocks waiting for the next message. |
| /// |
| /// [`next`]: Iterator::next |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use std::time::Duration; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded::<i32>(); |
| /// |
| /// thread::spawn(move || { |
| /// s.send(1).unwrap(); |
| /// thread::sleep(Duration::from_secs(1)); |
| /// s.send(2).unwrap(); |
| /// thread::sleep(Duration::from_secs(2)); |
| /// s.send(3).unwrap(); |
| /// }); |
| /// |
| /// thread::sleep(Duration::from_secs(2)); |
| /// |
| /// // Collect all messages from the channel without blocking. |
| /// // The third message hasn't been sent yet so we'll collect only the first two. |
| /// let v: Vec<_> = r.try_iter().collect(); |
| /// |
| /// assert_eq!(v, [1, 2]); |
| /// ``` |
| </span><span class="kw">pub struct </span>TryIter<<span class="lifetime">'a</span>, T> { |
| receiver: <span class="kw-2">&</span><span class="lifetime">'a </span>Receiver<T>, |
| } |
| |
| <span class="kw">impl</span><T> Iterator <span class="kw">for </span>TryIter<<span class="lifetime">'_</span>, T> { |
| <span class="kw">type </span>Item = T; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="self">self</span>.receiver.try_recv().ok() |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>TryIter<<span class="lifetime">'_</span>, 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.pad(<span class="string">"TryIter { .. }"</span>) |
| } |
| } |
| |
| <span class="doccomment">/// A blocking iterator over messages in a channel. |
| /// |
| /// Each call to [`next`] blocks waiting for the next message and then returns it. However, if the |
| /// channel becomes empty and disconnected, it returns [`None`] without blocking. |
| /// |
| /// [`next`]: Iterator::next |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use std::thread; |
| /// use crossbeam_channel::unbounded; |
| /// |
| /// let (s, r) = unbounded(); |
| /// |
| /// thread::spawn(move || { |
| /// s.send(1).unwrap(); |
| /// s.send(2).unwrap(); |
| /// s.send(3).unwrap(); |
| /// drop(s); // Disconnect the channel. |
| /// }); |
| /// |
| /// // Collect all messages from the channel. |
| /// // Note that the call to `collect` blocks until the sender is dropped. |
| /// let v: Vec<_> = r.into_iter().collect(); |
| /// |
| /// assert_eq!(v, [1, 2, 3]); |
| /// ``` |
| </span><span class="kw">pub struct </span>IntoIter<T> { |
| receiver: Receiver<T>, |
| } |
| |
| <span class="kw">impl</span><T> FusedIterator <span class="kw">for </span>IntoIter<T> {} |
| |
| <span class="kw">impl</span><T> Iterator <span class="kw">for </span>IntoIter<T> { |
| <span class="kw">type </span>Item = T; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="self">self</span>.receiver.recv().ok() |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>IntoIter<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.pad(<span class="string">"IntoIter { .. }"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><T> SelectHandle <span class="kw">for </span>Sender<T> { |
| <span class="kw">fn </span>try_select(<span class="kw-2">&</span><span class="self">self</span>, token: <span class="kw-2">&mut </span>Token) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().try_select(token), |
| SenderFlavor::List(chan) => chan.sender().try_select(token), |
| SenderFlavor::Zero(chan) => chan.sender().try_select(token), |
| } |
| } |
| |
| <span class="kw">fn </span>deadline(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Instant> { |
| <span class="prelude-val">None |
| </span>} |
| |
| <span class="kw">fn </span>register(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().register(oper, cx), |
| SenderFlavor::List(chan) => chan.sender().register(oper, cx), |
| SenderFlavor::Zero(chan) => chan.sender().register(oper, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>unregister(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation) { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().unregister(oper), |
| SenderFlavor::List(chan) => chan.sender().unregister(oper), |
| SenderFlavor::Zero(chan) => chan.sender().unregister(oper), |
| } |
| } |
| |
| <span class="kw">fn </span>accept(<span class="kw-2">&</span><span class="self">self</span>, token: <span class="kw-2">&mut </span>Token, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().accept(token, cx), |
| SenderFlavor::List(chan) => chan.sender().accept(token, cx), |
| SenderFlavor::Zero(chan) => chan.sender().accept(token, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>is_ready(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().is_ready(), |
| SenderFlavor::List(chan) => chan.sender().is_ready(), |
| SenderFlavor::Zero(chan) => chan.sender().is_ready(), |
| } |
| } |
| |
| <span class="kw">fn </span>watch(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().watch(oper, cx), |
| SenderFlavor::List(chan) => chan.sender().watch(oper, cx), |
| SenderFlavor::Zero(chan) => chan.sender().watch(oper, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>unwatch(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation) { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| SenderFlavor::Array(chan) => chan.sender().unwatch(oper), |
| SenderFlavor::List(chan) => chan.sender().unwatch(oper), |
| SenderFlavor::Zero(chan) => chan.sender().unwatch(oper), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> SelectHandle <span class="kw">for </span>Receiver<T> { |
| <span class="kw">fn </span>try_select(<span class="kw-2">&</span><span class="self">self</span>, token: <span class="kw-2">&mut </span>Token) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().try_select(token), |
| ReceiverFlavor::List(chan) => chan.receiver().try_select(token), |
| ReceiverFlavor::Zero(chan) => chan.receiver().try_select(token), |
| ReceiverFlavor::At(chan) => chan.try_select(token), |
| ReceiverFlavor::Tick(chan) => chan.try_select(token), |
| ReceiverFlavor::Never(chan) => chan.try_select(token), |
| } |
| } |
| |
| <span class="kw">fn </span>deadline(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Instant> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| ReceiverFlavor::List(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| ReceiverFlavor::Zero(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| ReceiverFlavor::At(chan) => chan.deadline(), |
| ReceiverFlavor::Tick(chan) => chan.deadline(), |
| ReceiverFlavor::Never(chan) => chan.deadline(), |
| } |
| } |
| |
| <span class="kw">fn </span>register(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().register(oper, cx), |
| ReceiverFlavor::List(chan) => chan.receiver().register(oper, cx), |
| ReceiverFlavor::Zero(chan) => chan.receiver().register(oper, cx), |
| ReceiverFlavor::At(chan) => chan.register(oper, cx), |
| ReceiverFlavor::Tick(chan) => chan.register(oper, cx), |
| ReceiverFlavor::Never(chan) => chan.register(oper, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>unregister(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation) { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().unregister(oper), |
| ReceiverFlavor::List(chan) => chan.receiver().unregister(oper), |
| ReceiverFlavor::Zero(chan) => chan.receiver().unregister(oper), |
| ReceiverFlavor::At(chan) => chan.unregister(oper), |
| ReceiverFlavor::Tick(chan) => chan.unregister(oper), |
| ReceiverFlavor::Never(chan) => chan.unregister(oper), |
| } |
| } |
| |
| <span class="kw">fn </span>accept(<span class="kw-2">&</span><span class="self">self</span>, token: <span class="kw-2">&mut </span>Token, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().accept(token, cx), |
| ReceiverFlavor::List(chan) => chan.receiver().accept(token, cx), |
| ReceiverFlavor::Zero(chan) => chan.receiver().accept(token, cx), |
| ReceiverFlavor::At(chan) => chan.accept(token, cx), |
| ReceiverFlavor::Tick(chan) => chan.accept(token, cx), |
| ReceiverFlavor::Never(chan) => chan.accept(token, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>is_ready(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().is_ready(), |
| ReceiverFlavor::List(chan) => chan.receiver().is_ready(), |
| ReceiverFlavor::Zero(chan) => chan.receiver().is_ready(), |
| ReceiverFlavor::At(chan) => chan.is_ready(), |
| ReceiverFlavor::Tick(chan) => chan.is_ready(), |
| ReceiverFlavor::Never(chan) => chan.is_ready(), |
| } |
| } |
| |
| <span class="kw">fn </span>watch(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation, cx: <span class="kw-2">&</span>Context) -> bool { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().watch(oper, cx), |
| ReceiverFlavor::List(chan) => chan.receiver().watch(oper, cx), |
| ReceiverFlavor::Zero(chan) => chan.receiver().watch(oper, cx), |
| ReceiverFlavor::At(chan) => chan.watch(oper, cx), |
| ReceiverFlavor::Tick(chan) => chan.watch(oper, cx), |
| ReceiverFlavor::Never(chan) => chan.watch(oper, cx), |
| } |
| } |
| |
| <span class="kw">fn </span>unwatch(<span class="kw-2">&</span><span class="self">self</span>, oper: Operation) { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.flavor { |
| ReceiverFlavor::Array(chan) => chan.receiver().unwatch(oper), |
| ReceiverFlavor::List(chan) => chan.receiver().unwatch(oper), |
| ReceiverFlavor::Zero(chan) => chan.receiver().unwatch(oper), |
| ReceiverFlavor::At(chan) => chan.unwatch(oper), |
| ReceiverFlavor::Tick(chan) => chan.unwatch(oper), |
| ReceiverFlavor::Never(chan) => chan.unwatch(oper), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Writes a message into the channel. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">unsafe fn </span>write<T>(s: <span class="kw-2">&</span>Sender<T>, token: <span class="kw-2">&mut </span>Token, msg: T) -> <span class="prelude-ty">Result</span><(), T> { |
| <span class="kw">match </span><span class="kw-2">&</span>s.flavor { |
| SenderFlavor::Array(chan) => chan.write(token, msg), |
| SenderFlavor::List(chan) => chan.write(token, msg), |
| SenderFlavor::Zero(chan) => chan.write(token, msg), |
| } |
| } |
| |
| <span class="doccomment">/// Reads a message from the channel. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">unsafe fn </span>read<T>(r: <span class="kw-2">&</span>Receiver<T>, token: <span class="kw-2">&mut </span>Token) -> <span class="prelude-ty">Result</span><T, ()> { |
| <span class="kw">match </span><span class="kw-2">&</span>r.flavor { |
| ReceiverFlavor::Array(chan) => chan.read(token), |
| ReceiverFlavor::List(chan) => chan.read(token), |
| ReceiverFlavor::Zero(chan) => chan.read(token), |
| ReceiverFlavor::At(chan) => { |
| mem::transmute_copy::<<span class="prelude-ty">Result</span><Instant, ()>, <span class="prelude-ty">Result</span><T, ()>>(<span class="kw-2">&</span>chan.read(token)) |
| } |
| ReceiverFlavor::Tick(chan) => { |
| mem::transmute_copy::<<span class="prelude-ty">Result</span><Instant, ()>, <span class="prelude-ty">Result</span><T, ()>>(<span class="kw-2">&</span>chan.read(token)) |
| } |
| ReceiverFlavor::Never(chan) => chan.read(token), |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="crossbeam_channel" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |