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</pre><pre class="rust ">
<span class="kw">use</span> {<span class="ident">Errno</span>, <span class="prelude-ty">Result</span>};
<span class="kw">use</span> <span class="ident">libc</span>::{<span class="self">self</span>, <span class="ident">c_int</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">RawFd</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>;
<span class="kw">use</span> ::<span class="ident">Error</span>;
<span class="macro">libc_bitflags</span><span class="macro">!</span>(
<span class="kw">pub</span> <span class="ident">flags</span> <span class="ident">EpollFlags</span>: <span class="ident">libc</span>::<span class="ident">c_int</span> {
<span class="ident">EPOLLIN</span>,
<span class="ident">EPOLLPRI</span>,
<span class="ident">EPOLLOUT</span>,
<span class="ident">EPOLLRDNORM</span>,
<span class="ident">EPOLLRDBAND</span>,
<span class="ident">EPOLLWRNORM</span>,
<span class="ident">EPOLLWRBAND</span>,
<span class="ident">EPOLLMSG</span>,
<span class="ident">EPOLLERR</span>,
<span class="ident">EPOLLHUP</span>,
<span class="ident">EPOLLRDHUP</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>)]</span> <span class="comment">// Added in 4.5; not in Android.</span>
<span class="ident">EPOLLEXCLUSIVE</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;mips&quot;</span>))]</span>
<span class="ident">EPOLLWAKEUP</span>,
<span class="ident">EPOLLONESHOT</span>,
<span class="ident">EPOLLET</span>,
}
);
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">EpollOp</span> {
<span class="ident">EpollCtlAdd</span> <span class="op">=</span> <span class="number">1</span>,
<span class="ident">EpollCtlDel</span> <span class="op">=</span> <span class="number">2</span>,
<span class="ident">EpollCtlMod</span> <span class="op">=</span> <span class="number">3</span>
}
<span class="macro">libc_bitflags</span><span class="macro">!</span>{
<span class="kw">pub</span> <span class="ident">flags</span> <span class="ident">EpollCreateFlags</span>: <span class="ident">c_int</span> {
<span class="ident">EPOLL_CLOEXEC</span>,
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>)]</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">EpollEvent</span> {
<span class="ident">event</span>: <span class="ident">libc</span>::<span class="ident">epoll_event</span>,
}
<span class="kw">impl</span> <span class="ident">EpollEvent</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">events</span>: <span class="ident">EpollFlags</span>, <span class="ident">data</span>: <span class="ident">u64</span>) <span class="op">-&gt;</span> <span class="self">Self</span> {
<span class="ident">EpollEvent</span> { <span class="ident">event</span>: <span class="ident">libc</span>::<span class="ident">epoll_event</span> { <span class="ident">events</span>: <span class="ident">events</span>.<span class="ident">bits</span>() <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">u64</span>: <span class="ident">data</span> } }
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">empty</span>() <span class="op">-&gt;</span> <span class="self">Self</span> {
<span class="kw">unsafe</span> { <span class="ident">mem</span>::<span class="ident">zeroed</span>::<span class="op">&lt;</span><span class="ident">EpollEvent</span><span class="op">&gt;</span>() }
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">events</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">EpollFlags</span> {
<span class="ident">EpollFlags</span>::<span class="ident">from_bits</span>(<span class="self">self</span>.<span class="ident">event</span>.<span class="ident">events</span> <span class="kw">as</span> <span class="ident">libc</span>::<span class="ident">c_int</span>).<span class="ident">unwrap</span>()
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">data</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">u64</span> {
<span class="self">self</span>.<span class="ident">event</span>.<span class="ident">u64</span>
}
}
<span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span> <span class="ident">Into</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="ident">EpollEvent</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="ident">EpollEvent</span><span class="op">&gt;</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">into</span>(<span class="self">self</span>) <span class="op">-&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="ident">EpollEvent</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="prelude-val">Some</span>(<span class="ident">epoll_event</span>) <span class="op">=&gt;</span> <span class="ident">epoll_event</span>,
<span class="prelude-val">None</span> <span class="op">=&gt;</span> <span class="kw">unsafe</span> { <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="ident">ptr</span>::<span class="ident">null_mut</span>::<span class="op">&lt;</span><span class="ident">EpollEvent</span><span class="op">&gt;</span>() }
}
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">epoll_create</span>() <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">RawFd</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">epoll_create</span>(<span class="number">1024</span>) };
<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">epoll_create1</span>(<span class="ident">flags</span>: <span class="ident">EpollCreateFlags</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">RawFd</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">epoll_create1</span>(<span class="ident">flags</span>.<span class="ident">bits</span>()) };
<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">epoll_ctl</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span>, <span class="ident">T</span><span class="op">&gt;</span>(<span class="ident">epfd</span>: <span class="ident">RawFd</span>, <span class="ident">op</span>: <span class="ident">EpollOp</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">event</span>: <span class="ident">T</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="ident">EpollEvent</span><span class="op">&gt;</span>
{
<span class="kw">let</span> <span class="ident">event</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EpollEvent</span> <span class="op">=</span> <span class="ident">event</span>.<span class="ident">into</span>();
<span class="kw">if</span> <span class="ident">event</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">EpollEvent</span> <span class="op">==</span> <span class="ident">ptr</span>::<span class="ident">null</span>() <span class="op">&amp;&amp;</span> <span class="ident">op</span> <span class="op">!=</span> <span class="ident">EpollOp</span>::<span class="ident">EpollCtlDel</span> {
<span class="prelude-val">Err</span>(<span class="ident">Error</span>::<span class="ident">Sys</span>(<span class="ident">Errno</span>::<span class="ident">EINVAL</span>))
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">epoll_ctl</span>(<span class="ident">epfd</span>, <span class="ident">op</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">fd</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">event</span>.<span class="ident">event</span>) };
<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="ident">drop</span>)
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">epoll_wait</span>(<span class="ident">epfd</span>: <span class="ident">RawFd</span>, <span class="ident">events</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">EpollEvent</span>], <span class="ident">timeout_ms</span>: <span class="ident">isize</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="ident">libc</span>::<span class="ident">epoll_wait</span>(<span class="ident">epfd</span>, <span class="ident">events</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">epoll_event</span>, <span class="ident">events</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">timeout_ms</span> <span class="kw">as</span> <span class="ident">c_int</span>)
};
<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>)
}
</pre>
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