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</pre><pre class="rust ">
<span class="doccomment">//! Support for concurrent and parallel programming.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! This crate is an early work in progress. The focus for the moment is</span>
<span class="doccomment">//! concurrency:</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - **Non-blocking data structures**. These data structures allow for high</span>
<span class="doccomment">//! performance, highly-concurrent access, much superior to wrapping with a</span>
<span class="doccomment">//! `Mutex`. Ultimately the goal is to include stacks, queues, deques, bags,</span>
<span class="doccomment">//! sets and maps. These live in the `sync` module.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - **Memory management**. Because non-blocking data structures avoid global</span>
<span class="doccomment">//! synchronization, it is not easy to tell when internal data can be safely</span>
<span class="doccomment">//! freed. The `mem` module provides generic, easy to use, and high-performance</span>
<span class="doccomment">//! APIs for managing memory in these cases. These live in the `mem` module.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - **Synchronization**. The standard library provides a few synchronization</span>
<span class="doccomment">//! primitives (locks, semaphores, barriers, etc) but this crate seeks to expand</span>
<span class="doccomment">//! that set to include more advanced/niche primitives, as well as userspace</span>
<span class="doccomment">//! alternatives. These live in the `sync` module.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - **Scoped thread API**. Finally, the crate provides a "scoped" thread API,</span>
<span class="doccomment">//! making it possible to spawn threads that share stack data with their</span>
<span class="doccomment">//! parents. This functionality is exported at the top-level.</span>
<span class="comment">//#![deny(missing_docs)]</span>
<span class="attribute">#<span class="op">!</span>[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"nightly"</span>,
<span class="ident">feature</span>(<span class="ident">const_fn</span>, <span class="ident">repr_simd</span>, <span class="ident">optin_builtin_traits</span>))]</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">thread</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">scoped</span>::{<span class="ident">scope</span>, <span class="ident">Scope</span>, <span class="ident">ScopedJoinHandle</span>};
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">mem</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">sync</span>;
<span class="kw">mod</span> <span class="ident">scoped</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">trait</span> <span class="ident">FnBox</span> {
<span class="kw">fn</span> <span class="ident">call_box</span>(<span class="self">self</span>: <span class="ident">Box</span><span class="op"><</span><span class="self">Self</span><span class="op">></span>);
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnOnce</span>()<span class="op">></span> <span class="ident">FnBox</span> <span class="kw">for</span> <span class="ident">F</span> {
<span class="kw">fn</span> <span class="ident">call_box</span>(<span class="self">self</span>: <span class="ident">Box</span><span class="op"><</span><span class="self">Self</span><span class="op">></span>) { (<span class="kw-2">*</span><span class="self">self</span>)() }
}
<span class="doccomment">/// Like `std::thread::spawn`, but without the closure bounds.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">spawn_unsafe</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">F</span><span class="op">></span>(<span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">thread</span>::<span class="ident">JoinHandle</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnOnce</span>() <span class="op">+</span> <span class="ident">Send</span> <span class="op">+</span> <span class="lifetime">'a</span> {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>;
<span class="kw">let</span> <span class="ident">closure</span>: <span class="ident">Box</span><span class="op"><</span><span class="ident">FnBox</span> <span class="op">+</span> <span class="lifetime">'a</span><span class="op">></span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">f</span>);
<span class="kw">let</span> <span class="ident">closure</span>: <span class="ident">Box</span><span class="op"><</span><span class="ident">FnBox</span> <span class="op">+</span> <span class="ident">Send</span><span class="op">></span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">closure</span>);
<span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span> <span class="op">||</span> <span class="ident">closure</span>.<span class="ident">call_box</span>())
}
</pre>
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