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| </pre><div class="example-wrap"><pre class="rust "> |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">num</span>::<span class="ident">NonZeroU8</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">fmt</span>, <span class="ident">ops</span>}; |
| |
| <span class="doccomment">/// Interest used in registering.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Interest are used in [registering] [`event::Source`]s with [`Poll`], they</span> |
| <span class="doccomment">/// indicate what readiness should be monitored for. For example if a socket is</span> |
| <span class="doccomment">/// registered with [readable] interests and the socket becomes writable, no</span> |
| <span class="doccomment">/// event will be returned from a call to [`poll`].</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [registering]: struct.Registry.html#method.register</span> |
| <span class="doccomment">/// [`event::Source`]: ./event/trait.Source.html</span> |
| <span class="doccomment">/// [`Poll`]: struct.Poll.html</span> |
| <span class="doccomment">/// [readable]: struct.Interest.html#associatedconstant.READABLE</span> |
| <span class="doccomment">/// [`poll`]: struct.Poll.html#method.poll</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Clone</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Interest</span>(<span class="ident">NonZeroU8</span>); |
| |
| <span class="comment">// These must be unique.</span> |
| <span class="kw">const</span> <span class="ident">READABLE</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0b0001</span>; |
| <span class="kw">const</span> <span class="ident">WRITABLE</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0b0010</span>; |
| <span class="comment">// The following are not available on all platforms.</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>( |
| <span class="ident">not</span>(<span class="ident">any</span>( |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span> |
| )), |
| <span class="ident">allow</span>(<span class="ident">dead_code</span>) |
| )]</span> |
| <span class="kw">const</span> <span class="ident">AIO</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0b0100</span>; |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>), <span class="ident">allow</span>(<span class="ident">dead_code</span>))]</span> |
| <span class="kw">const</span> <span class="ident">LIO</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0b1000</span>; |
| |
| <span class="kw">impl</span> <span class="ident">Interest</span> { |
| <span class="doccomment">/// Returns a `Interest` set representing readable interests.</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">READABLE</span>: <span class="ident">Interest</span> <span class="op">=</span> <span class="ident">Interest</span>(<span class="kw">unsafe</span> { <span class="ident">NonZeroU8</span>::<span class="ident">new_unchecked</span>(<span class="ident">READABLE</span>) }); |
| |
| <span class="doccomment">/// Returns a `Interest` set representing writable interests.</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">WRITABLE</span>: <span class="ident">Interest</span> <span class="op">=</span> <span class="ident">Interest</span>(<span class="kw">unsafe</span> { <span class="ident">NonZeroU8</span>::<span class="ident">new_unchecked</span>(<span class="ident">WRITABLE</span>) }); |
| |
| <span class="doccomment">/// Returns a `Interest` set representing AIO completion interests.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>( |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span> |
| ))]</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">AIO</span>: <span class="ident">Interest</span> <span class="op">=</span> <span class="ident">Interest</span>(<span class="kw">unsafe</span> { <span class="ident">NonZeroU8</span>::<span class="ident">new_unchecked</span>(<span class="ident">AIO</span>) }); |
| |
| <span class="doccomment">/// Returns a `Interest` set representing LIO completion interests.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">LIO</span>: <span class="ident">Interest</span> <span class="op">=</span> <span class="ident">Interest</span>(<span class="kw">unsafe</span> { <span class="ident">NonZeroU8</span>::<span class="ident">new_unchecked</span>(<span class="ident">LIO</span>) }); |
| |
| <span class="doccomment">/// Add together two `Interest`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This does the same thing as the `BitOr` implementation, but is a</span> |
| <span class="doccomment">/// constant function.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```</span> |
| <span class="doccomment">/// use mio::Interest;</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// const INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);</span> |
| <span class="doccomment">/// # fn silent_dead_code_warning(_: Interest) { }</span> |
| <span class="doccomment">/// # silent_dead_code_warning(INTERESTS)</span> |
| <span class="doccomment">/// ```</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy</span>::<span class="ident">should_implement_trait</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">add</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Interest</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Interest</span> { |
| <span class="ident">Interest</span>(<span class="kw">unsafe</span> { <span class="ident">NonZeroU8</span>::<span class="ident">new_unchecked</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">|</span> <span class="ident">other</span>.<span class="number">0</span>.<span class="ident">get</span>()) }) |
| } |
| |
| <span class="doccomment">/// Removes `other` `Interest` from `self`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns `None` if the set would be empty after removing `other`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```</span> |
| <span class="doccomment">/// use mio::Interest;</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// const RW_INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// // As long a one interest remain this will return `Some`.</span> |
| <span class="doccomment">/// let w_interest = RW_INTERESTS.remove(Interest::READABLE).unwrap();</span> |
| <span class="doccomment">/// assert!(!w_interest.is_readable());</span> |
| <span class="doccomment">/// assert!(w_interest.is_writable());</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// // Removing all interests from the set will return `None`.</span> |
| <span class="doccomment">/// assert_eq!(w_interest.remove(Interest::WRITABLE), None);</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// // Its also possible to remove multiple interests at once.</span> |
| <span class="doccomment">/// assert_eq!(RW_INTERESTS.remove(RW_INTERESTS), None);</span> |
| <span class="doccomment">/// ```</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Interest</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Interest</span><span class="op">></span> { |
| <span class="ident">NonZeroU8</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">&</span> <span class="op">!</span><span class="ident">other</span>.<span class="number">0</span>.<span class="ident">get</span>()).<span class="ident">map</span>(<span class="ident">Interest</span>) |
| } |
| |
| <span class="doccomment">/// Returns true if the value includes readable readiness.</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">is_readable</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| (<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">&</span> <span class="ident">READABLE</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="doccomment">/// Returns true if the value includes writable readiness.</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">is_writable</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| (<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">&</span> <span class="ident">WRITABLE</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="doccomment">/// Returns true if `Interest` contains AIO readiness</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">is_aio</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| (<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">&</span> <span class="ident">AIO</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="doccomment">/// Returns true if `Interest` contains LIO readiness</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">is_lio</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| (<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>() <span class="op">&</span> <span class="ident">LIO</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ops</span>::<span class="ident">BitOr</span> <span class="kw">for</span> <span class="ident">Interest</span> { |
| <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="self">Self</span>; |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">bitor</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="self">Self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> { |
| <span class="self">self</span>.<span class="ident">add</span>(<span class="ident">other</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ops</span>::<span class="ident">BitOrAssign</span> <span class="kw">for</span> <span class="ident">Interest</span> { |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">bitor_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="self">Self</span>) { |
| <span class="self">self</span>.<span class="number">0</span> <span class="op">=</span> (<span class="kw-2">*</span><span class="self">self</span> <span class="op">|</span> <span class="ident">other</span>).<span class="number">0</span>; |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Interest</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</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="lifetime">'_</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">one</span> <span class="op">=</span> <span class="bool-val">false</span>; |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_readable</span>() { |
| <span class="kw">if</span> <span class="ident">one</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">" | "</span>)<span class="question-mark">?</span> |
| } |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"READABLE"</span>)<span class="question-mark">?</span>; |
| <span class="ident">one</span> <span class="op">=</span> <span class="bool-val">true</span> |
| } |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_writable</span>() { |
| <span class="kw">if</span> <span class="ident">one</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">" | "</span>)<span class="question-mark">?</span> |
| } |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"WRITABLE"</span>)<span class="question-mark">?</span>; |
| <span class="ident">one</span> <span class="op">=</span> <span class="bool-val">true</span> |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>( |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, |
| <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span> |
| ))]</span> |
| { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_aio</span>() { |
| <span class="kw">if</span> <span class="ident">one</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">" | "</span>)<span class="question-mark">?</span> |
| } |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"AIO"</span>)<span class="question-mark">?</span>; |
| <span class="ident">one</span> <span class="op">=</span> <span class="bool-val">true</span> |
| } |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>))]</span> |
| { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_lio</span>() { |
| <span class="kw">if</span> <span class="ident">one</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">" | "</span>)<span class="question-mark">?</span> |
| } |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"LIO"</span>)<span class="question-mark">?</span>; |
| <span class="ident">one</span> <span class="op">=</span> <span class="bool-val">true</span> |
| } |
| } |
| <span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">one</span>, <span class="string">"printing empty interests"</span>); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </pre></div> |
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