<!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 to the Rust file `libstd/os/raw/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../../light.css" id="themeStyle"><script src="../../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../../settings.html"><img src="../../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="comment">// Copyright 2015 The Rust Project Developers. See the COPYRIGHT</span>
<span class="comment">// file at the top-level directory of this distribution and at</span>
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="doccomment">//! Platform-specific types, as defined by C.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Code that interacts via FFI will almost certainly be using the</span>
<span class="doccomment">//! base types provided by C, which aren't nearly as nicely defined</span>
<span class="doccomment">//! as Rust's primitive types. This module provides types which will</span>
<span class="doccomment">//! match those defined by C, so that code that interacts with C will</span>
<span class="doccomment">//! refer to the correct types.</span>
<span class="attribute">#![<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span>
<span class="kw">use</span> <span class="ident">fmt</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/char.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"s390x"</span>)),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>)),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"l4re"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>)))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_char</span> <span class="op">=</span> <span class="ident">u8</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/char.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">any</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"s390x"</span>)),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>)),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"l4re"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>),
<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>))))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_char</span> <span class="op">=</span> <span class="ident">i8</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/schar.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_schar</span> <span class="op">=</span> <span class="ident">i8</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/uchar.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_uchar</span> <span class="op">=</span> <span class="ident">u8</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/short.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_short</span> <span class="op">=</span> <span class="ident">i16</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/ushort.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_ushort</span> <span class="op">=</span> <span class="ident">u16</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/int.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_int</span> <span class="op">=</span> <span class="ident">i32</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/uint.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_uint</span> <span class="op">=</span> <span class="ident">u32</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/long.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"32"</span>, <span class="ident">windows</span>))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_long</span> <span class="op">=</span> <span class="ident">i32</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/ulong.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"32"</span>, <span class="ident">windows</span>))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_ulong</span> <span class="op">=</span> <span class="ident">u32</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/long.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"64"</span>, <span class="ident">not</span>(<span class="ident">windows</span>)))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_long</span> <span class="op">=</span> <span class="ident">i64</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/ulong.md"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"64"</span>, <span class="ident">not</span>(<span class="ident">windows</span>)))]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_ulong</span> <span class="op">=</span> <span class="ident">u64</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/longlong.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_longlong</span> <span class="op">=</span> <span class="ident">i64</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/ulonglong.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_ulonglong</span> <span class="op">=</span> <span class="ident">u64</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/float.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_float</span> <span class="op">=</span> <span class="ident">f32</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">include</span> <span class="op">=</span> <span class="string">"os/raw/double.md"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">c_double</span> <span class="op">=</span> <span class="ident">f64</span>;
<span class="doccomment">/// Equivalent to C's `void` type when used as a [pointer].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// In essence, `*const c_void` is equivalent to C's `const void*`</span>
<span class="doccomment">/// and `*mut c_void` is equivalent to C's `void*`. That said, this is</span>
<span class="doccomment">/// *not* the same as C's `void` return type, which is Rust's `()` type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Ideally, this type would be equivalent to [`!`], but currently it may</span>
<span class="doccomment">/// be more ideal to use `c_void` for FFI purposes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`!`]: ../../primitive.never.html</span>
<span class="doccomment">/// [pointer]: ../../primitive.pointer.html</span>
<span class="comment">// NB: For LLVM to recognize the void pointer type and by extension</span>
<span class="comment">// functions like malloc(), we need to have it represented as i8* in</span>
<span class="comment">// LLVM bitcode. The enum used here ensures this and prevents misuse</span>
<span class="comment">// of the "raw" type by only having private variants.. We need two</span>
<span class="comment">// variants, because the compiler complains about the repr attribute</span>
<span class="comment">// otherwise.</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">u8</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_os"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.1.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">c_void</span> {
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"c_void_variant"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"should not have to exist"</span>,
<span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="ident">__variant1</span>,
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"c_void_variant"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"should not have to exist"</span>,
<span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="ident">__variant2</span>,
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">c_void</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"c_void"</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_imports</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="ident">any</span>::<span class="ident">TypeId</span>;
<span class="kw">use</span> <span class="ident">libc</span>;
<span class="kw">use</span> <span class="ident">mem</span>;
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">ok</span> {
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span>)<span class="kw-2">*</span>) <span class="op">=></span> {$(
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">TypeId</span>::<span class="ident">of</span>::<span class="op"><</span><span class="ident">libc</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span>() <span class="op">==</span> <span class="ident">TypeId</span>::<span class="ident">of</span>::<span class="op"><</span><span class="ident">raw</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span><span class="op">></span>(),
<span class="string">"{} is wrong"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>));
)<span class="kw-2">*</span>}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">same</span>() {
<span class="kw">use</span> <span class="ident">os</span>::<span class="ident">raw</span>;
<span class="macro">ok</span><span class="macro">!</span>(<span class="ident">c_char</span> <span class="ident">c_schar</span> <span class="ident">c_uchar</span> <span class="ident">c_short</span> <span class="ident">c_ushort</span> <span class="ident">c_int</span> <span class="ident">c_uint</span> <span class="ident">c_long</span> <span class="ident">c_ulong</span>
<span class="ident">c_longlong</span> <span class="ident">c_ulonglong</span> <span class="ident">c_float</span> <span class="ident">c_double</span>);
}
}
</pre>
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