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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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| </pre><pre class="rust "> |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::{<span class="self">self</span>, <span class="ident">Read</span>, <span class="ident">Write</span>}; |
| |
| <span class="kw">use</span> <span class="ident">futures</span>::<span class="ident">Async</span>; |
| <span class="kw">use</span> <span class="ident">futures</span>::<span class="ident">sync</span>::<span class="ident">BiLock</span>; |
| |
| <span class="kw">use</span> <span class="ident">io</span>::<span class="ident">Io</span>; |
| |
| <span class="doccomment">/// The readable half of an object returned from `Io::split`.</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ReadHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="ident">handle</span>: <span class="ident">BiLock</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, |
| } |
| |
| <span class="doccomment">/// The writable half of an object returned from `Io::split`.</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WriteHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="ident">handle</span>: <span class="ident">BiLock</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Io</span><span class="op">></span>(<span class="ident">t</span>: <span class="ident">T</span>) <span class="op">-></span> (<span class="ident">ReadHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">WriteHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) { |
| <span class="kw">let</span> (<span class="ident">a</span>, <span class="ident">b</span>) <span class="op">=</span> <span class="ident">BiLock</span>::<span class="ident">new</span>(<span class="ident">t</span>); |
| (<span class="ident">ReadHalf</span> { <span class="ident">handle</span>: <span class="ident">a</span> }, <span class="ident">WriteHalf</span> { <span class="ident">handle</span>: <span class="ident">b</span> }) |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Io</span><span class="op">></span> <span class="ident">ReadHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="doccomment">/// Calls the underlying `poll_read` function on this handling, testing to</span> |
| <span class="doccomment">/// see if it's ready to be read from.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">poll_read</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Async</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">handle</span>.<span class="ident">poll_lock</span>() { |
| <span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="kw-2">mut</span> <span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>.<span class="ident">poll_read</span>(), |
| <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=></span> <span class="ident">Async</span>::<span class="ident">NotReady</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Io</span><span class="op">></span> <span class="ident">WriteHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="doccomment">/// Calls the underlying `poll_write` function on this handling, testing to</span> |
| <span class="doccomment">/// see if it's ready to be written to.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">poll_write</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Async</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">handle</span>.<span class="ident">poll_lock</span>() { |
| <span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="kw-2">mut</span> <span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>.<span class="ident">poll_write</span>(), |
| <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=></span> <span class="ident">Async</span>::<span class="ident">NotReady</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Read</span><span class="op">></span> <span class="ident">Read</span> <span class="kw">for</span> <span class="ident">ReadHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">handle</span>.<span class="ident">poll_lock</span>() { |
| <span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="kw-2">mut</span> <span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>.<span class="ident">read</span>(<span class="ident">buf</span>), |
| <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span>.<span class="ident">into</span>()), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Write</span><span class="op">></span> <span class="ident">Write</span> <span class="kw">for</span> <span class="ident">WriteHalf</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">handle</span>.<span class="ident">poll_lock</span>() { |
| <span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="kw-2">mut</span> <span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>.<span class="ident">write</span>(<span class="ident">buf</span>), |
| <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span>.<span class="ident">into</span>()), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">handle</span>.<span class="ident">poll_lock</span>() { |
| <span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="kw-2">mut</span> <span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>.<span class="ident">flush</span>(), |
| <span class="ident">Async</span>::<span class="ident">NotReady</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span>.<span class="ident">into</span>()), |
| } |
| } |
| } |
| </pre> |
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