| <!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-epoch-0.9.14/src/collector.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>collector.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_epoch/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_epoch/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="doccomment">/// Epoch-based garbage collector. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use crossbeam_epoch::Collector; |
| /// |
| /// let collector = Collector::new(); |
| /// |
| /// let handle = collector.register(); |
| /// drop(collector); // `handle` still works after dropping `collector` |
| /// |
| /// handle.pin().flush(); |
| /// ``` |
| </span><span class="kw">use </span>core::fmt; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::guard::Guard; |
| <span class="kw">use </span><span class="kw">crate</span>::internal::{Global, Local}; |
| <span class="kw">use </span><span class="kw">crate</span>::primitive::sync::Arc; |
| |
| <span class="doccomment">/// An epoch-based garbage collector. |
| </span><span class="kw">pub struct </span>Collector { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) global: Arc<Global>, |
| } |
| |
| <span class="kw">unsafe impl </span>Send <span class="kw">for </span>Collector {} |
| <span class="kw">unsafe impl </span>Sync <span class="kw">for </span>Collector {} |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>Collector { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| global: Arc::new(Global::new()), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Collector { |
| <span class="doccomment">/// Creates a new collector. |
| </span><span class="kw">pub fn </span>new() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::default() |
| } |
| |
| <span class="doccomment">/// Registers a new handle for the collector. |
| </span><span class="kw">pub fn </span>register(<span class="kw-2">&</span><span class="self">self</span>) -> LocalHandle { |
| Local::register(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>Clone <span class="kw">for </span>Collector { |
| <span class="doccomment">/// Creates another reference to the same garbage collector. |
| </span><span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| Collector { |
| global: <span class="self">self</span>.global.clone(), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Collector { |
| <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">"Collector { .. }"</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>PartialEq <span class="kw">for </span>Collector { |
| <span class="doccomment">/// Checks if both handles point to the same collector. |
| </span><span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, rhs: <span class="kw-2">&</span>Collector) -> bool { |
| Arc::ptr_eq(<span class="kw-2">&</span><span class="self">self</span>.global, <span class="kw-2">&</span>rhs.global) |
| } |
| } |
| <span class="kw">impl </span>Eq <span class="kw">for </span>Collector {} |
| |
| <span class="doccomment">/// A handle to a garbage collector. |
| </span><span class="kw">pub struct </span>LocalHandle { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) local: <span class="kw-2">*const </span>Local, |
| } |
| |
| <span class="kw">impl </span>LocalHandle { |
| <span class="doccomment">/// Pins the handle. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>pin(<span class="kw-2">&</span><span class="self">self</span>) -> Guard { |
| <span class="kw">unsafe </span>{ (<span class="kw-2">*</span><span class="self">self</span>.local).pin() } |
| } |
| |
| <span class="doccomment">/// Returns `true` if the handle is pinned. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_pinned(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">unsafe </span>{ (<span class="kw-2">*</span><span class="self">self</span>.local).is_pinned() } |
| } |
| |
| <span class="doccomment">/// Returns the `Collector` associated with this handle. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>collector(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>Collector { |
| <span class="kw">unsafe </span>{ (<span class="kw-2">*</span><span class="self">self</span>.local).collector() } |
| } |
| } |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>LocalHandle { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ |
| Local::release_handle(<span class="kw-2">&*</span><span class="self">self</span>.local); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>LocalHandle { |
| <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">"LocalHandle { .. }"</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(test, not(crossbeam_loom)))] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span>std::mem::ManuallyDrop; |
| <span class="kw">use </span>std::sync::atomic::{AtomicUsize, Ordering}; |
| |
| <span class="kw">use </span>crossbeam_utils::thread; |
| |
| <span class="kw">use crate</span>::{Collector, Owned}; |
| |
| <span class="kw">const </span>NUM_THREADS: usize = <span class="number">8</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>pin_reentrant() { |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| drop(collector); |
| |
| <span class="macro">assert!</span>(!handle.is_pinned()); |
| { |
| <span class="kw">let </span>_guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="macro">assert!</span>(handle.is_pinned()); |
| { |
| <span class="kw">let </span>_guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="macro">assert!</span>(handle.is_pinned()); |
| } |
| <span class="macro">assert!</span>(handle.is_pinned()); |
| } |
| <span class="macro">assert!</span>(!handle.is_pinned()); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>flush_local_bag() { |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| drop(collector); |
| |
| <span class="kw">for _ in </span><span class="number">0</span>..<span class="number">100 </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>a = Owned::new(<span class="number">7</span>).into_shared(guard); |
| guard.defer_destroy(a); |
| |
| <span class="macro">assert!</span>(!(<span class="kw-2">*</span>guard.local).bag.with(|b| (<span class="kw-2">*</span>b).is_empty())); |
| |
| <span class="kw">while </span>!(<span class="kw-2">*</span>guard.local).bag.with(|b| (<span class="kw-2">*</span>b).is_empty()) { |
| guard.flush(); |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>garbage_buffering() { |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| drop(collector); |
| |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="kw">unsafe </span>{ |
| <span class="kw">for _ in </span><span class="number">0</span>..<span class="number">10 </span>{ |
| <span class="kw">let </span>a = Owned::new(<span class="number">7</span>).into_shared(guard); |
| guard.defer_destroy(a); |
| } |
| <span class="macro">assert!</span>(!(<span class="kw-2">*</span>guard.local).bag.with(|b| (<span class="kw-2">*</span>b).is_empty())); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>pin_holds_advance() { |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>N: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>N: usize = <span class="number">500_000</span>; |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| |
| thread::scope(|scope| { |
| <span class="kw">for _ in </span><span class="number">0</span>..NUM_THREADS { |
| scope.spawn(|<span class="kw">_</span>| { |
| <span class="kw">let </span>handle = collector.register(); |
| <span class="kw">for _ in </span><span class="number">0</span>..N { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| |
| <span class="kw">let </span>before = collector.global.epoch.load(Ordering::Relaxed); |
| collector.global.collect(guard); |
| <span class="kw">let </span>after = collector.global.epoch.load(Ordering::Relaxed); |
| |
| <span class="macro">assert!</span>(after.wrapping_sub(before) <= <span class="number">2</span>); |
| } |
| }); |
| } |
| }) |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[cfg(not(crossbeam_sanitize))] </span><span class="comment">// TODO: assertions failed due to `cfg(crossbeam_sanitize)` reduce `internal::MAX_OBJECTS` |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>incremental() { |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DESTROYS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="kw">for _ in </span><span class="number">0</span>..COUNT { |
| <span class="kw">let </span>a = Owned::new(<span class="number">7i32</span>).into_shared(guard); |
| guard.defer_unchecked(<span class="kw">move </span>|| { |
| drop(a.into_owned()); |
| DESTROYS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| }); |
| } |
| guard.flush(); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>last = <span class="number">0</span>; |
| |
| <span class="kw">while </span>last < COUNT { |
| <span class="kw">let </span>curr = DESTROYS.load(Ordering::Relaxed); |
| <span class="macro">assert!</span>(curr - last <= <span class="number">1024</span>); |
| last = curr; |
| |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert!</span>(DESTROYS.load(Ordering::Relaxed) == COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>buffering() { |
| <span class="kw">const </span>COUNT: usize = <span class="number">10</span>; |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>N: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>N: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DESTROYS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="kw">for _ in </span><span class="number">0</span>..COUNT { |
| <span class="kw">let </span>a = Owned::new(<span class="number">7i32</span>).into_shared(guard); |
| guard.defer_unchecked(<span class="kw">move </span>|| { |
| drop(a.into_owned()); |
| DESTROYS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| }); |
| } |
| } |
| |
| <span class="kw">for _ in </span><span class="number">0</span>..N { |
| collector.global.collect(<span class="kw-2">&</span>handle.pin()); |
| } |
| <span class="macro">assert!</span>(DESTROYS.load(Ordering::Relaxed) < COUNT); |
| |
| handle.pin().flush(); |
| |
| <span class="kw">while </span>DESTROYS.load(Ordering::Relaxed) < COUNT { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert_eq!</span>(DESTROYS.load(Ordering::Relaxed), COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>count_drops() { |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DROPS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">struct </span>Elem(i32); |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>Elem { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| DROPS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| } |
| } |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| |
| <span class="kw">for _ in </span><span class="number">0</span>..COUNT { |
| <span class="kw">let </span>a = Owned::new(Elem(<span class="number">7i32</span>)).into_shared(guard); |
| guard.defer_destroy(a); |
| } |
| guard.flush(); |
| } |
| |
| <span class="kw">while </span>DROPS.load(Ordering::Relaxed) < COUNT { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert_eq!</span>(DROPS.load(Ordering::Relaxed), COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>count_destroy() { |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DESTROYS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| |
| <span class="kw">for _ in </span><span class="number">0</span>..COUNT { |
| <span class="kw">let </span>a = Owned::new(<span class="number">7i32</span>).into_shared(guard); |
| guard.defer_unchecked(<span class="kw">move </span>|| { |
| drop(a.into_owned()); |
| DESTROYS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| }); |
| } |
| guard.flush(); |
| } |
| |
| <span class="kw">while </span>DESTROYS.load(Ordering::Relaxed) < COUNT { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert_eq!</span>(DESTROYS.load(Ordering::Relaxed), COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>drop_array() { |
| <span class="kw">const </span>COUNT: usize = <span class="number">700</span>; |
| <span class="kw">static </span>DROPS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">struct </span>Elem(i32); |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>Elem { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| DROPS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| } |
| } |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>guard = handle.pin(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>v = Vec::with_capacity(COUNT); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..COUNT { |
| v.push(Elem(i <span class="kw">as </span>i32)); |
| } |
| |
| { |
| <span class="kw">let </span>a = Owned::new(v).into_shared(<span class="kw-2">&</span>guard); |
| <span class="kw">unsafe </span>{ |
| guard.defer_destroy(a); |
| } |
| guard.flush(); |
| } |
| |
| <span class="kw">while </span>DROPS.load(Ordering::Relaxed) < COUNT { |
| guard.repin(); |
| collector.global.collect(<span class="kw-2">&</span>guard); |
| } |
| <span class="macro">assert_eq!</span>(DROPS.load(Ordering::Relaxed), COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>destroy_array() { |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DESTROYS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| <span class="kw">let </span>handle = collector.register(); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>v = Vec::with_capacity(COUNT); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..COUNT { |
| v.push(i <span class="kw">as </span>i32); |
| } |
| |
| <span class="kw">let </span>len = v.len(); |
| <span class="kw">let </span>ptr = ManuallyDrop::new(v).as_mut_ptr() <span class="kw">as </span>usize; |
| guard.defer_unchecked(<span class="kw">move </span>|| { |
| drop(Vec::from_raw_parts(ptr <span class="kw">as </span><span class="kw-2">*const </span>i32 <span class="kw">as </span><span class="kw-2">*mut </span>i32, len, len)); |
| DESTROYS.fetch_add(len, Ordering::Relaxed); |
| }); |
| guard.flush(); |
| } |
| |
| <span class="kw">while </span>DESTROYS.load(Ordering::Relaxed) < COUNT { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert_eq!</span>(DESTROYS.load(Ordering::Relaxed), COUNT); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>stress() { |
| <span class="kw">const </span>THREADS: usize = <span class="number">8</span>; |
| <span class="attribute">#[cfg(miri)] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">500</span>; |
| <span class="attribute">#[cfg(not(miri))] |
| </span><span class="kw">const </span>COUNT: usize = <span class="number">100_000</span>; |
| <span class="kw">static </span>DROPS: AtomicUsize = AtomicUsize::new(<span class="number">0</span>); |
| |
| <span class="kw">struct </span>Elem(i32); |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>Elem { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| DROPS.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| } |
| } |
| |
| <span class="kw">let </span>collector = Collector::new(); |
| |
| thread::scope(|scope| { |
| <span class="kw">for _ in </span><span class="number">0</span>..THREADS { |
| scope.spawn(|<span class="kw">_</span>| { |
| <span class="kw">let </span>handle = collector.register(); |
| <span class="kw">for _ in </span><span class="number">0</span>..COUNT { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>a = Owned::new(Elem(<span class="number">7i32</span>)).into_shared(guard); |
| guard.defer_destroy(a); |
| } |
| } |
| }); |
| } |
| }) |
| .unwrap(); |
| |
| <span class="kw">let </span>handle = collector.register(); |
| <span class="kw">while </span>DROPS.load(Ordering::Relaxed) < COUNT * THREADS { |
| <span class="kw">let </span>guard = <span class="kw-2">&</span>handle.pin(); |
| collector.global.collect(guard); |
| } |
| <span class="macro">assert_eq!</span>(DROPS.load(Ordering::Relaxed), COUNT * THREADS); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="crossbeam_epoch" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
