| <!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/git/checkouts/tokio-377c595163f99a10/dfe252d/tokio/src/io/ready.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ready.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="../../../tokio/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="../../../tokio/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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| </pre><pre class="rust"><code><span class="attribute">#![cfg_attr(not(feature = <span class="string">"net"</span>), allow(unreachable_pub))] |
| |
| </span><span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::ops; |
| |
| <span class="kw">const </span>READABLE: usize = <span class="number">0b0_01</span>; |
| <span class="kw">const </span>WRITABLE: usize = <span class="number">0b0_10</span>; |
| <span class="kw">const </span>READ_CLOSED: usize = <span class="number">0b0_0100</span>; |
| <span class="kw">const </span>WRITE_CLOSED: usize = <span class="number">0b0_1000</span>; |
| |
| <span class="doccomment">/// Describes the readiness state of an I/O resources. |
| /// |
| /// `Ready` tracks which operation an I/O resource is ready to perform. |
| </span><span class="attribute">#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"net"</span>)))] |
| #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)] |
| </span><span class="kw">pub struct </span>Ready(usize); |
| |
| <span class="kw">impl </span>Ready { |
| <span class="doccomment">/// Returns the empty `Ready` set. |
| </span><span class="kw">pub const </span>EMPTY: Ready = Ready(<span class="number">0</span>); |
| |
| <span class="doccomment">/// Returns a `Ready` representing readable readiness. |
| </span><span class="kw">pub const </span>READABLE: Ready = Ready(READABLE); |
| |
| <span class="doccomment">/// Returns a `Ready` representing writable readiness. |
| </span><span class="kw">pub const </span>WRITABLE: Ready = Ready(WRITABLE); |
| |
| <span class="doccomment">/// Returns a `Ready` representing read closed readiness. |
| </span><span class="kw">pub const </span>READ_CLOSED: Ready = Ready(READ_CLOSED); |
| |
| <span class="doccomment">/// Returns a `Ready` representing write closed readiness. |
| </span><span class="kw">pub const </span>WRITE_CLOSED: Ready = Ready(WRITE_CLOSED); |
| |
| <span class="doccomment">/// Returns a `Ready` representing readiness for all operations. |
| </span><span class="kw">pub const </span>ALL: Ready = Ready(READABLE | WRITABLE | READ_CLOSED | WRITE_CLOSED); |
| |
| <span class="comment">// Must remain crate-private to avoid adding a public dependency on Mio. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_mio(event: <span class="kw-2">&</span>mio::event::Event) -> Ready { |
| <span class="kw">let </span><span class="kw-2">mut </span>ready = Ready::EMPTY; |
| |
| <span class="attribute">#[cfg(all(target_os = <span class="string">"freebsd"</span>, feature = <span class="string">"net"</span>))] |
| </span>{ |
| <span class="kw">if </span>event.is_aio() { |
| ready |= Ready::READABLE; |
| } |
| |
| <span class="kw">if </span>event.is_lio() { |
| ready |= Ready::READABLE; |
| } |
| } |
| |
| <span class="kw">if </span>event.is_readable() { |
| ready |= Ready::READABLE; |
| } |
| |
| <span class="kw">if </span>event.is_writable() { |
| ready |= Ready::WRITABLE; |
| } |
| |
| <span class="kw">if </span>event.is_read_closed() { |
| ready |= Ready::READ_CLOSED; |
| } |
| |
| <span class="kw">if </span>event.is_write_closed() { |
| ready |= Ready::WRITE_CLOSED; |
| } |
| |
| ready |
| } |
| |
| <span class="doccomment">/// Returns true if `Ready` is the empty set. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use tokio::io::Ready; |
| /// |
| /// assert!(Ready::EMPTY.is_empty()); |
| /// assert!(!Ready::READABLE.is_empty()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_empty(<span class="self">self</span>) -> bool { |
| <span class="self">self </span>== Ready::EMPTY |
| } |
| |
| <span class="doccomment">/// Returns `true` if the value includes `readable`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use tokio::io::Ready; |
| /// |
| /// assert!(!Ready::EMPTY.is_readable()); |
| /// assert!(Ready::READABLE.is_readable()); |
| /// assert!(Ready::READ_CLOSED.is_readable()); |
| /// assert!(!Ready::WRITABLE.is_readable()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_readable(<span class="self">self</span>) -> bool { |
| <span class="self">self</span>.contains(Ready::READABLE) || <span class="self">self</span>.is_read_closed() |
| } |
| |
| <span class="doccomment">/// Returns `true` if the value includes writable `readiness`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use tokio::io::Ready; |
| /// |
| /// assert!(!Ready::EMPTY.is_writable()); |
| /// assert!(!Ready::READABLE.is_writable()); |
| /// assert!(Ready::WRITABLE.is_writable()); |
| /// assert!(Ready::WRITE_CLOSED.is_writable()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_writable(<span class="self">self</span>) -> bool { |
| <span class="self">self</span>.contains(Ready::WRITABLE) || <span class="self">self</span>.is_write_closed() |
| } |
| |
| <span class="doccomment">/// Returns `true` if the value includes read-closed `readiness`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use tokio::io::Ready; |
| /// |
| /// assert!(!Ready::EMPTY.is_read_closed()); |
| /// assert!(!Ready::READABLE.is_read_closed()); |
| /// assert!(Ready::READ_CLOSED.is_read_closed()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_read_closed(<span class="self">self</span>) -> bool { |
| <span class="self">self</span>.contains(Ready::READ_CLOSED) |
| } |
| |
| <span class="doccomment">/// Returns `true` if the value includes write-closed `readiness`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use tokio::io::Ready; |
| /// |
| /// assert!(!Ready::EMPTY.is_write_closed()); |
| /// assert!(!Ready::WRITABLE.is_write_closed()); |
| /// assert!(Ready::WRITE_CLOSED.is_write_closed()); |
| /// ``` |
| </span><span class="kw">pub fn </span>is_write_closed(<span class="self">self</span>) -> bool { |
| <span class="self">self</span>.contains(Ready::WRITE_CLOSED) |
| } |
| |
| <span class="doccomment">/// Returns true if `self` is a superset of `other`. |
| /// |
| /// `other` may represent more than one readiness operations, in which case |
| /// the function only returns true if `self` contains all readiness |
| /// specified in `other`. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>contains<T: Into<<span class="self">Self</span>>>(<span class="self">self</span>, other: T) -> bool { |
| <span class="kw">let </span>other = other.into(); |
| (<span class="self">self </span>& other) == other |
| } |
| |
| <span class="doccomment">/// Creates a `Ready` instance using the given `usize` representation. |
| /// |
| /// The `usize` representation must have been obtained from a call to |
| /// `Readiness::as_usize`. |
| /// |
| /// This function is mainly provided to allow the caller to get a |
| /// readiness value from an `AtomicUsize`. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_usize(val: usize) -> Ready { |
| Ready(val & Ready::ALL.as_usize()) |
| } |
| |
| <span class="doccomment">/// Returns a `usize` representation of the `Ready` value. |
| /// |
| /// This function is mainly provided to allow the caller to store a |
| /// readiness value in an `AtomicUsize`. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>as_usize(<span class="self">self</span>) -> usize { |
| <span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="macro">cfg_io_readiness! </span>{ |
| <span class="kw">use </span><span class="kw">crate</span>::io::Interest; |
| |
| <span class="kw">impl </span>Ready { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_interest(interest: Interest) -> Ready { |
| <span class="kw">let </span><span class="kw-2">mut </span>ready = Ready::EMPTY; |
| |
| <span class="kw">if </span>interest.is_readable() { |
| ready |= Ready::READABLE; |
| ready |= Ready::READ_CLOSED; |
| } |
| |
| <span class="kw">if </span>interest.is_writable() { |
| ready |= Ready::WRITABLE; |
| ready |= Ready::WRITE_CLOSED; |
| } |
| |
| ready |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>intersection(<span class="self">self</span>, interest: Interest) -> Ready { |
| Ready(<span class="self">self</span>.<span class="number">0 </span>& Ready::from_interest(interest).<span class="number">0</span>) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>satisfies(<span class="self">self</span>, interest: Interest) -> bool { |
| <span class="self">self</span>.<span class="number">0 </span>& Ready::from_interest(interest).<span class="number">0 </span>!= <span class="number">0 |
| </span>} |
| } |
| } |
| |
| <span class="kw">impl </span>ops::BitOr<Ready> <span class="kw">for </span>Ready { |
| <span class="kw">type </span>Output = Ready; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bitor(<span class="self">self</span>, other: Ready) -> Ready { |
| Ready(<span class="self">self</span>.<span class="number">0 </span>| other.<span class="number">0</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>ops::BitOrAssign<Ready> <span class="kw">for </span>Ready { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bitor_assign(<span class="kw-2">&mut </span><span class="self">self</span>, other: Ready) { |
| <span class="self">self</span>.<span class="number">0 </span>|= other.<span class="number">0</span>; |
| } |
| } |
| |
| <span class="kw">impl </span>ops::BitAnd<Ready> <span class="kw">for </span>Ready { |
| <span class="kw">type </span>Output = Ready; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bitand(<span class="self">self</span>, other: Ready) -> Ready { |
| Ready(<span class="self">self</span>.<span class="number">0 </span>& other.<span class="number">0</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>ops::Sub<Ready> <span class="kw">for </span>Ready { |
| <span class="kw">type </span>Output = Ready; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub(<span class="self">self</span>, other: Ready) -> Ready { |
| Ready(<span class="self">self</span>.<span class="number">0 </span>& !other.<span class="number">0</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Ready { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| fmt.debug_struct(<span class="string">"Ready"</span>) |
| .field(<span class="string">"is_readable"</span>, <span class="kw-2">&</span><span class="self">self</span>.is_readable()) |
| .field(<span class="string">"is_writable"</span>, <span class="kw-2">&</span><span class="self">self</span>.is_writable()) |
| .field(<span class="string">"is_read_closed"</span>, <span class="kw-2">&</span><span class="self">self</span>.is_read_closed()) |
| .field(<span class="string">"is_write_closed"</span>, <span class="kw-2">&</span><span class="self">self</span>.is_write_closed()) |
| .finish() |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |