| <!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/runtime/task/list.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>list.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> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| <span id="139">139</span> |
| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
| <span id="143">143</span> |
| <span id="144">144</span> |
| <span id="145">145</span> |
| <span id="146">146</span> |
| <span id="147">147</span> |
| <span id="148">148</span> |
| <span id="149">149</span> |
| <span id="150">150</span> |
| <span id="151">151</span> |
| <span id="152">152</span> |
| <span id="153">153</span> |
| <span id="154">154</span> |
| <span id="155">155</span> |
| <span id="156">156</span> |
| <span id="157">157</span> |
| <span id="158">158</span> |
| <span id="159">159</span> |
| <span id="160">160</span> |
| <span id="161">161</span> |
| <span id="162">162</span> |
| <span id="163">163</span> |
| <span id="164">164</span> |
| <span id="165">165</span> |
| <span id="166">166</span> |
| <span id="167">167</span> |
| <span id="168">168</span> |
| <span id="169">169</span> |
| <span id="170">170</span> |
| <span id="171">171</span> |
| <span id="172">172</span> |
| <span id="173">173</span> |
| <span id="174">174</span> |
| <span id="175">175</span> |
| <span id="176">176</span> |
| <span id="177">177</span> |
| <span id="178">178</span> |
| <span id="179">179</span> |
| <span id="180">180</span> |
| <span id="181">181</span> |
| <span id="182">182</span> |
| <span id="183">183</span> |
| <span id="184">184</span> |
| <span id="185">185</span> |
| <span id="186">186</span> |
| <span id="187">187</span> |
| <span id="188">188</span> |
| <span id="189">189</span> |
| <span id="190">190</span> |
| <span id="191">191</span> |
| <span id="192">192</span> |
| <span id="193">193</span> |
| <span id="194">194</span> |
| <span id="195">195</span> |
| <span id="196">196</span> |
| <span id="197">197</span> |
| <span id="198">198</span> |
| <span id="199">199</span> |
| <span id="200">200</span> |
| <span id="201">201</span> |
| <span id="202">202</span> |
| <span id="203">203</span> |
| <span id="204">204</span> |
| <span id="205">205</span> |
| <span id="206">206</span> |
| <span id="207">207</span> |
| <span id="208">208</span> |
| <span id="209">209</span> |
| <span id="210">210</span> |
| <span id="211">211</span> |
| <span id="212">212</span> |
| <span id="213">213</span> |
| <span id="214">214</span> |
| <span id="215">215</span> |
| <span id="216">216</span> |
| <span id="217">217</span> |
| <span id="218">218</span> |
| <span id="219">219</span> |
| <span id="220">220</span> |
| <span id="221">221</span> |
| <span id="222">222</span> |
| <span id="223">223</span> |
| <span id="224">224</span> |
| <span id="225">225</span> |
| <span id="226">226</span> |
| <span id="227">227</span> |
| <span id="228">228</span> |
| <span id="229">229</span> |
| <span id="230">230</span> |
| <span id="231">231</span> |
| <span id="232">232</span> |
| <span id="233">233</span> |
| <span id="234">234</span> |
| <span id="235">235</span> |
| <span id="236">236</span> |
| <span id="237">237</span> |
| <span id="238">238</span> |
| <span id="239">239</span> |
| <span id="240">240</span> |
| <span id="241">241</span> |
| <span id="242">242</span> |
| <span id="243">243</span> |
| <span id="244">244</span> |
| <span id="245">245</span> |
| <span id="246">246</span> |
| <span id="247">247</span> |
| <span id="248">248</span> |
| <span id="249">249</span> |
| <span id="250">250</span> |
| <span id="251">251</span> |
| <span id="252">252</span> |
| <span id="253">253</span> |
| <span id="254">254</span> |
| <span id="255">255</span> |
| <span id="256">256</span> |
| <span id="257">257</span> |
| <span id="258">258</span> |
| <span id="259">259</span> |
| <span id="260">260</span> |
| <span id="261">261</span> |
| <span id="262">262</span> |
| <span id="263">263</span> |
| <span id="264">264</span> |
| <span id="265">265</span> |
| <span id="266">266</span> |
| <span id="267">267</span> |
| <span id="268">268</span> |
| <span id="269">269</span> |
| <span id="270">270</span> |
| <span id="271">271</span> |
| <span id="272">272</span> |
| <span id="273">273</span> |
| <span id="274">274</span> |
| <span id="275">275</span> |
| <span id="276">276</span> |
| <span id="277">277</span> |
| <span id="278">278</span> |
| <span id="279">279</span> |
| <span id="280">280</span> |
| <span id="281">281</span> |
| <span id="282">282</span> |
| <span id="283">283</span> |
| <span id="284">284</span> |
| <span id="285">285</span> |
| <span id="286">286</span> |
| <span id="287">287</span> |
| <span id="288">288</span> |
| <span id="289">289</span> |
| <span id="290">290</span> |
| <span id="291">291</span> |
| <span id="292">292</span> |
| <span id="293">293</span> |
| <span id="294">294</span> |
| <span id="295">295</span> |
| <span id="296">296</span> |
| <span id="297">297</span> |
| <span id="298">298</span> |
| <span id="299">299</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! This module has containers for storing the tasks spawned on a scheduler. The |
| //! `OwnedTasks` container is thread-safe but can only store tasks that |
| //! implement Send. The `LocalOwnedTasks` container is not thread safe, but can |
| //! store non-Send tasks. |
| //! |
| //! The collections can be closed to prevent adding new tasks during shutdown of |
| //! the scheduler with the collection. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::future::Future; |
| <span class="kw">use </span><span class="kw">crate</span>::loom::cell::UnsafeCell; |
| <span class="kw">use </span><span class="kw">crate</span>::loom::sync::Mutex; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime::task::{JoinHandle, LocalNotified, Notified, Schedule, Task}; |
| <span class="kw">use </span><span class="kw">crate</span>::util::linked_list::{Link, LinkedList}; |
| |
| <span class="kw">use </span>std::marker::PhantomData; |
| |
| <span class="comment">// The id from the module below is used to verify whether a given task is stored |
| // in this OwnedTasks, or some other task. The counter starts at one so we can |
| // use zero for tasks not owned by any list. |
| // |
| // The safety checks in this file can technically be violated if the counter is |
| // overflown, but the checks are not supposed to ever fail unless there is a |
| // bug in Tokio, so we accept that certain bugs would not be caught if the two |
| // mixed up runtimes happen to have the same id. |
| |
| </span><span class="macro">cfg_has_atomic_u64! </span>{ |
| <span class="kw">use </span>std::sync::atomic::{AtomicU64, Ordering}; |
| |
| <span class="kw">static </span>NEXT_OWNED_TASKS_ID: AtomicU64 = AtomicU64::new(<span class="number">1</span>); |
| |
| <span class="kw">fn </span>get_next_id() -> u64 { |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>id = NEXT_OWNED_TASKS_ID.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| <span class="kw">if </span>id != <span class="number">0 </span>{ |
| <span class="kw">return </span>id; |
| } |
| } |
| } |
| } |
| |
| <span class="macro">cfg_not_has_atomic_u64! </span>{ |
| <span class="kw">use </span>std::sync::atomic::{AtomicU32, Ordering}; |
| |
| <span class="kw">static </span>NEXT_OWNED_TASKS_ID: AtomicU32 = AtomicU32::new(<span class="number">1</span>); |
| |
| <span class="kw">fn </span>get_next_id() -> u64 { |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>id = NEXT_OWNED_TASKS_ID.fetch_add(<span class="number">1</span>, Ordering::Relaxed); |
| <span class="kw">if </span>id != <span class="number">0 </span>{ |
| <span class="kw">return </span>u64::from(id); |
| } |
| } |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>OwnedTasks<S: <span class="lifetime">'static</span>> { |
| inner: Mutex<OwnedTasksInner<S>>, |
| id: u64, |
| } |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>LocalOwnedTasks<S: <span class="lifetime">'static</span>> { |
| inner: UnsafeCell<OwnedTasksInner<S>>, |
| id: u64, |
| _not_send_or_sync: PhantomData<<span class="kw-2">*const </span>()>, |
| } |
| <span class="kw">struct </span>OwnedTasksInner<S: <span class="lifetime">'static</span>> { |
| list: LinkedList<Task<S>, <Task<S> <span class="kw">as </span>Link>::Target>, |
| closed: bool, |
| } |
| |
| <span class="kw">impl</span><S: <span class="lifetime">'static</span>> OwnedTasks<S> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new() -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| inner: Mutex::new(OwnedTasksInner { |
| list: LinkedList::new(), |
| closed: <span class="bool-val">false</span>, |
| }), |
| id: get_next_id(), |
| } |
| } |
| |
| <span class="doccomment">/// Binds the provided task to this OwnedTasks instance. This fails if the |
| /// OwnedTasks has been closed. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>bind<T>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| task: T, |
| scheduler: S, |
| id: <span class="kw">super</span>::Id, |
| ) -> (JoinHandle<T::Output>, <span class="prelude-ty">Option</span><Notified<S>>) |
| <span class="kw">where |
| </span>S: Schedule, |
| T: Future + Send + <span class="lifetime">'static</span>, |
| T::Output: Send + <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(task, notified, join) = <span class="kw">super</span>::new_task(task, scheduler, id); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="comment">// safety: We just created the task, so we have exclusive access |
| // to the field. |
| </span>task.header().set_owner_id(<span class="self">self</span>.id); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>lock = <span class="self">self</span>.inner.lock(); |
| <span class="kw">if </span>lock.closed { |
| drop(lock); |
| drop(notified); |
| task.shutdown(); |
| (join, <span class="prelude-val">None</span>) |
| } <span class="kw">else </span>{ |
| lock.list.push_front(task); |
| (join, <span class="prelude-val">Some</span>(notified)) |
| } |
| } |
| |
| <span class="doccomment">/// Asserts that the given task is owned by this OwnedTasks and convert it to |
| /// a LocalNotified, giving the thread permission to poll this task. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>assert_owner(<span class="kw-2">&</span><span class="self">self</span>, task: Notified<S>) -> LocalNotified<S> { |
| <span class="macro">assert_eq!</span>(task.header().get_owner_id(), <span class="self">self</span>.id); |
| |
| <span class="comment">// safety: All tasks bound to this OwnedTasks are Send, so it is safe |
| // to poll it on this thread no matter what thread we are on. |
| </span>LocalNotified { |
| task: task.<span class="number">0</span>, |
| _not_send: PhantomData, |
| } |
| } |
| |
| <span class="doccomment">/// Shuts down all tasks in the collection. This call also closes the |
| /// collection, preventing new items from being added. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>close_and_shutdown_all(<span class="kw-2">&</span><span class="self">self</span>) |
| <span class="kw">where |
| </span>S: Schedule, |
| { |
| <span class="comment">// The first iteration of the loop was unrolled so it can set the |
| // closed bool. |
| </span><span class="kw">let </span>first_task = { |
| <span class="kw">let </span><span class="kw-2">mut </span>lock = <span class="self">self</span>.inner.lock(); |
| lock.closed = <span class="bool-val">true</span>; |
| lock.list.pop_back() |
| }; |
| <span class="kw">match </span>first_task { |
| <span class="prelude-val">Some</span>(task) => task.shutdown(), |
| <span class="prelude-val">None </span>=> <span class="kw">return</span>, |
| } |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>task = <span class="kw">match </span><span class="self">self</span>.inner.lock().list.pop_back() { |
| <span class="prelude-val">Some</span>(task) => task, |
| <span class="prelude-val">None </span>=> <span class="kw">return</span>, |
| }; |
| |
| task.shutdown(); |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>remove(<span class="kw-2">&</span><span class="self">self</span>, task: <span class="kw-2">&</span>Task<S>) -> <span class="prelude-ty">Option</span><Task<S>> { |
| <span class="kw">let </span>task_id = task.header().get_owner_id(); |
| <span class="kw">if </span>task_id == <span class="number">0 </span>{ |
| <span class="comment">// The task is unowned. |
| </span><span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="macro">assert_eq!</span>(task_id, <span class="self">self</span>.id); |
| |
| <span class="comment">// safety: We just checked that the provided task is not in some other |
| // linked list. |
| </span><span class="kw">unsafe </span>{ <span class="self">self</span>.inner.lock().list.remove(task.header_ptr()) } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.inner.lock().list.is_empty() |
| } |
| } |
| |
| <span class="kw">impl</span><S: <span class="lifetime">'static</span>> LocalOwnedTasks<S> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new() -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| inner: UnsafeCell::new(OwnedTasksInner { |
| list: LinkedList::new(), |
| closed: <span class="bool-val">false</span>, |
| }), |
| id: get_next_id(), |
| _not_send_or_sync: PhantomData, |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>bind<T>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| task: T, |
| scheduler: S, |
| id: <span class="kw">super</span>::Id, |
| ) -> (JoinHandle<T::Output>, <span class="prelude-ty">Option</span><Notified<S>>) |
| <span class="kw">where |
| </span>S: Schedule, |
| T: Future + <span class="lifetime">'static</span>, |
| T::Output: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(task, notified, join) = <span class="kw">super</span>::new_task(task, scheduler, id); |
| |
| <span class="kw">unsafe </span>{ |
| <span class="comment">// safety: We just created the task, so we have exclusive access |
| // to the field. |
| </span>task.header().set_owner_id(<span class="self">self</span>.id); |
| } |
| |
| <span class="kw">if </span><span class="self">self</span>.is_closed() { |
| drop(notified); |
| task.shutdown(); |
| (join, <span class="prelude-val">None</span>) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.with_inner(|inner| { |
| inner.list.push_front(task); |
| }); |
| (join, <span class="prelude-val">Some</span>(notified)) |
| } |
| } |
| |
| <span class="doccomment">/// Shuts down all tasks in the collection. This call also closes the |
| /// collection, preventing new items from being added. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>close_and_shutdown_all(<span class="kw-2">&</span><span class="self">self</span>) |
| <span class="kw">where |
| </span>S: Schedule, |
| { |
| <span class="self">self</span>.with_inner(|inner| inner.closed = <span class="bool-val">true</span>); |
| |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(task) = <span class="self">self</span>.with_inner(|inner| inner.list.pop_back()) { |
| task.shutdown(); |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>remove(<span class="kw-2">&</span><span class="self">self</span>, task: <span class="kw-2">&</span>Task<S>) -> <span class="prelude-ty">Option</span><Task<S>> { |
| <span class="kw">let </span>task_id = task.header().get_owner_id(); |
| <span class="kw">if </span>task_id == <span class="number">0 </span>{ |
| <span class="comment">// The task is unowned. |
| </span><span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="macro">assert_eq!</span>(task_id, <span class="self">self</span>.id); |
| |
| <span class="self">self</span>.with_inner(|inner| |
| <span class="comment">// safety: We just checked that the provided task is not in some |
| // other linked list. |
| </span><span class="kw">unsafe </span>{ inner.list.remove(task.header_ptr()) }) |
| } |
| |
| <span class="doccomment">/// Asserts that the given task is owned by this LocalOwnedTasks and convert |
| /// it to a LocalNotified, giving the thread permission to poll this task. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>assert_owner(<span class="kw-2">&</span><span class="self">self</span>, task: Notified<S>) -> LocalNotified<S> { |
| <span class="macro">assert_eq!</span>(task.header().get_owner_id(), <span class="self">self</span>.id); |
| |
| <span class="comment">// safety: The task was bound to this LocalOwnedTasks, and the |
| // LocalOwnedTasks is not Send or Sync, so we are on the right thread |
| // for polling this task. |
| </span>LocalNotified { |
| task: task.<span class="number">0</span>, |
| _not_send: PhantomData, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_inner<F, T>(<span class="kw-2">&</span><span class="self">self</span>, f: F) -> T |
| <span class="kw">where |
| </span>F: FnOnce(<span class="kw-2">&mut </span>OwnedTasksInner<S>) -> T, |
| { |
| <span class="comment">// safety: This type is not Sync, so concurrent calls of this method |
| // can't happen. Furthermore, all uses of this method in this file make |
| // sure that they don't call `with_inner` recursively. |
| </span><span class="self">self</span>.inner.with_mut(|ptr| <span class="kw">unsafe </span>{ f(<span class="kw-2">&mut *</span>ptr) }) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_closed(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.with_inner(|inner| inner.closed) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.with_inner(|inner| inner.list.is_empty()) |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(test))] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="comment">// This test may run in parallel with other tests, so we only test that ids |
| // come in increasing order. |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_id_not_broken() { |
| <span class="kw">let </span><span class="kw-2">mut </span>last_id = get_next_id(); |
| <span class="macro">assert_ne!</span>(last_id, <span class="number">0</span>); |
| |
| <span class="kw">for _ in </span><span class="number">0</span>..<span class="number">1000 </span>{ |
| <span class="kw">let </span>next_id = get_next_id(); |
| <span class="macro">assert_ne!</span>(next_id, <span class="number">0</span>); |
| <span class="macro">assert!</span>(last_id < next_id); |
| last_id = next_id; |
| } |
| } |
| } |
| </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> |
