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| </pre><div class="example-wrap"><pre class="rust "> |
| <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">Interest</span>, <span class="ident">Token</span>}; |
| |
| <span class="kw">use</span> <span class="ident">libc</span>::{<span class="ident">EPOLLET</span>, <span class="ident">EPOLLIN</span>, <span class="ident">EPOLLOUT</span>, <span class="ident">EPOLLRDHUP</span>}; |
| <span class="kw">use</span> <span class="ident">log</span>::<span class="ident">error</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">AsRawFd</span>, <span class="ident">RawFd</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::{<span class="ident">AtomicBool</span>, <span class="ident">AtomicUsize</span>, <span class="ident">Ordering</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::<span class="ident">Duration</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">cmp</span>, <span class="ident">i32</span>, <span class="ident">io</span>, <span class="ident">ptr</span>}; |
| |
| <span class="doccomment">/// Unique id for use as `SelectorId`.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="kw">static</span> <span class="ident">NEXT_ID</span>: <span class="ident">AtomicUsize</span> <span class="op">=</span> <span class="ident">AtomicUsize</span>::<span class="ident">new</span>(<span class="number">1</span>); |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Selector</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">id</span>: <span class="ident">usize</span>, |
| <span class="ident">ep</span>: <span class="ident">RawFd</span>, |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">has_waker</span>: <span class="ident">AtomicBool</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Selector</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Selector</span><span class="op">></span> { |
| <span class="comment">// According to libuv, `EPOLL_CLOEXEC` is not defined on Android API <</span> |
| <span class="comment">// 21. But `EPOLL_CLOEXEC` is an alias for `O_CLOEXEC` on that platform,</span> |
| <span class="comment">// so we use it instead.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>)]</span> |
| <span class="kw">let</span> <span class="ident">flag</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">O_CLOEXEC</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>))]</span> |
| <span class="kw">let</span> <span class="ident">flag</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">EPOLL_CLOEXEC</span>; |
| |
| <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">epoll_create1</span>(<span class="ident">flag</span>)).<span class="ident">map</span>(<span class="op">|</span><span class="ident">ep</span><span class="op">|</span> <span class="ident">Selector</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">id</span>: <span class="ident">NEXT_ID</span>.<span class="ident">fetch_add</span>(<span class="number">1</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>), |
| <span class="ident">ep</span>, |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">has_waker</span>: <span class="ident">AtomicBool</span>::<span class="ident">new</span>(<span class="bool-val">false</span>), |
| }) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Selector</span><span class="op">></span> { |
| <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="self">self</span>.<span class="ident">ep</span>, <span class="ident">libc</span>::<span class="ident">F_DUPFD_CLOEXEC</span>, <span class="kw">super</span>::<span class="ident">LOWEST_FD</span>)).<span class="ident">map</span>(<span class="op">|</span><span class="ident">ep</span><span class="op">|</span> <span class="ident">Selector</span> { |
| <span class="comment">// It's the same selector, so we use the same id.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">id</span>: <span class="self">self</span>.<span class="ident">id</span>, |
| <span class="ident">ep</span>, |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="ident">has_waker</span>: <span class="ident">AtomicBool</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="ident">has_waker</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Acquire</span>)), |
| }) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">select</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">events</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Events</span>, <span class="ident">timeout</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) <span class="op">-</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="comment">// A bug in kernels < 2.6.37 makes timeouts larger than LONG_MAX / CONFIG_HZ</span> |
| <span class="comment">// (approx. 30 minutes with CONFIG_HZ=1200) effectively infinite on 32 bits</span> |
| <span class="comment">// architectures. The magic number is the same constant used by libuv.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"32"</span>)]</span> |
| <span class="kw">const</span> <span class="ident">MAX_SAFE_TIMEOUT</span>: <span class="ident">u128</span> <span class="op">=</span> <span class="number">1789569</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_pointer_width</span> <span class="op">=</span> <span class="string">"32"</span>))]</span> |
| <span class="kw">const</span> <span class="ident">MAX_SAFE_TIMEOUT</span>: <span class="ident">u128</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">c_int</span>::<span class="ident">max_value</span>() <span class="kw">as</span> <span class="ident">u128</span>; |
| |
| <span class="kw">let</span> <span class="ident">timeout</span> <span class="op">=</span> <span class="ident">timeout</span> |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">to</span><span class="op">|</span> <span class="ident">cmp</span>::<span class="ident">min</span>(<span class="ident">to</span>.<span class="ident">as_millis</span>(), <span class="ident">MAX_SAFE_TIMEOUT</span>) <span class="kw">as</span> <span class="ident">libc</span>::<span class="ident">c_int</span>) |
| .<span class="ident">unwrap_or</span>(<span class="op">-</span><span class="number">1</span>); |
| |
| <span class="ident">events</span>.<span class="ident">clear</span>(); |
| <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">epoll_wait</span>( |
| <span class="self">self</span>.<span class="ident">ep</span>, |
| <span class="ident">events</span>.<span class="ident">as_mut_ptr</span>(), |
| <span class="ident">events</span>.<span class="ident">capacity</span>() <span class="kw">as</span> <span class="ident">i32</span>, |
| <span class="ident">timeout</span>, |
| )) |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">n_events</span><span class="op">|</span> { |
| <span class="comment">// This is safe because `epoll_wait` ensures that `n_events` are</span> |
| <span class="comment">// assigned.</span> |
| <span class="kw">unsafe</span> { <span class="ident">events</span>.<span class="ident">set_len</span>(<span class="ident">n_events</span> <span class="kw">as</span> <span class="ident">usize</span>) }; |
| }) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">register</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">token</span>: <span class="ident">Token</span>, <span class="ident">interests</span>: <span class="ident">Interest</span>) <span class="op">-</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">let</span> <span class="kw-2">mut</span> <span class="ident">event</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">epoll_event</span> { |
| <span class="ident">events</span>: <span class="ident">interests_to_epoll</span>(<span class="ident">interests</span>), |
| <span class="ident">u64</span>: <span class="ident">usize</span>::<span class="ident">from</span>(<span class="ident">token</span>) <span class="kw">as</span> <span class="ident">u64</span>, |
| }; |
| |
| <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">epoll_ctl</span>(<span class="self">self</span>.<span class="ident">ep</span>, <span class="ident">libc</span>::<span class="ident">EPOLL_CTL_ADD</span>, <span class="ident">fd</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">event</span>)).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">reregister</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">token</span>: <span class="ident">Token</span>, <span class="ident">interests</span>: <span class="ident">Interest</span>) <span class="op">-</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">let</span> <span class="kw-2">mut</span> <span class="ident">event</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">epoll_event</span> { |
| <span class="ident">events</span>: <span class="ident">interests_to_epoll</span>(<span class="ident">interests</span>), |
| <span class="ident">u64</span>: <span class="ident">usize</span>::<span class="ident">from</span>(<span class="ident">token</span>) <span class="kw">as</span> <span class="ident">u64</span>, |
| }; |
| |
| <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">epoll_ctl</span>(<span class="self">self</span>.<span class="ident">ep</span>, <span class="ident">libc</span>::<span class="ident">EPOLL_CTL_MOD</span>, <span class="ident">fd</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">event</span>)).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deregister</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-</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="macro">syscall</span><span class="macro">!</span>(<span class="ident">epoll_ctl</span>(<span class="self">self</span>.<span class="ident">ep</span>, <span class="ident">libc</span>::<span class="ident">EPOLL_CTL_DEL</span>, <span class="ident">fd</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>())).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">register_waker</span>(<span class="kw-2">&</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="ident">has_waker</span>.<span class="ident">swap</span>(<span class="bool-val">true</span>, <span class="ident">Ordering</span>::<span class="ident">AcqRel</span>) |
| } |
| } |
| |
| <span class="macro">cfg_io_source</span><span class="macro">!</span> { |
| <span class="kw">impl</span> <span class="ident">Selector</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">debug_assertions</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">id</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">id</span> |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">AsRawFd</span> <span class="kw">for</span> <span class="ident">Selector</span> { |
| <span class="kw">fn</span> <span class="ident">as_raw_fd</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">RawFd</span> { |
| <span class="self">self</span>.<span class="ident">ep</span> |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">Selector</span> { |
| <span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span> <span class="macro">syscall</span><span class="macro">!</span>(<span class="ident">close</span>(<span class="self">self</span>.<span class="ident">ep</span>)) { |
| <span class="macro">error</span><span class="macro">!</span>(<span class="string">"error closing epoll: {}"</span>, <span class="ident">err</span>); |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">interests_to_epoll</span>(<span class="ident">interests</span>: <span class="ident">Interest</span>) <span class="op">-</span><span class="op">></span> <span class="ident">u32</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">kind</span> <span class="op">=</span> <span class="ident">EPOLLET</span>; |
| |
| <span class="kw">if</span> <span class="ident">interests</span>.<span class="ident">is_readable</span>() { |
| <span class="ident">kind</span> <span class="op">=</span> <span class="ident">kind</span> <span class="op">|</span> <span class="ident">EPOLLIN</span> <span class="op">|</span> <span class="ident">EPOLLRDHUP</span>; |
| } |
| |
| <span class="kw">if</span> <span class="ident">interests</span>.<span class="ident">is_writable</span>() { |
| <span class="ident">kind</span> <span class="op">|</span><span class="op">=</span> <span class="ident">EPOLLOUT</span>; |
| } |
| |
| <span class="ident">kind</span> <span class="kw">as</span> <span class="ident">u32</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Event</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">epoll_event</span>; |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Events</span> <span class="op">=</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Event</span><span class="op">></span>; |
| |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">event</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; |
| |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">sys</span>::<span class="ident">Event</span>; |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">Token</span>; |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">token</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Token</span> { |
| <span class="ident">Token</span>(<span class="ident">event</span>.<span class="ident">u64</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_readable</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLIN</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| <span class="op">|</span><span class="op">|</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLPRI</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_writable</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLOUT</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_error</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLERR</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_read_closed</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| <span class="comment">// Both halves of the socket have closed</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLHUP</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| <span class="comment">// Socket has received FIN or called shutdown(SHUT_RD)</span> |
| <span class="op">|</span><span class="op">|</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLIN</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| <span class="op">&&</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLRDHUP</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span>) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_write_closed</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| <span class="comment">// Both halves of the socket have closed</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLHUP</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| <span class="comment">// Unix pipe write end has closed</span> |
| <span class="op">|</span><span class="op">|</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLOUT</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| <span class="op">&&</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLERR</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span>) |
| <span class="comment">// The other side (read end) of a Unix pipe has closed.</span> |
| <span class="op">|</span><span class="op">|</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="op">=</span><span class="op">=</span> <span class="ident">libc</span>::<span class="ident">EPOLLERR</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_priority</span>(<span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</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="op">&</span> <span class="ident">libc</span>::<span class="ident">EPOLLPRI</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_aio</span>(<span class="kw">_</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| <span class="comment">// Not supported in the kernel, only in libc.</span> |
| <span class="bool-val">false</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_lio</span>(<span class="kw">_</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| <span class="comment">// Not supported.</span> |
| <span class="bool-val">false</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">debug_details</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="lifetime">'_</span><span class="op">></span>, <span class="ident">event</span>: <span class="kw-2">&</span><span class="ident">Event</span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy</span>::<span class="ident">trivially_copy_pass_by_ref</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">check_events</span>(<span class="ident">got</span>: <span class="kw-2">&</span><span class="ident">u32</span>, <span class="ident">want</span>: <span class="kw-2">&</span><span class="ident">libc</span>::<span class="ident">c_int</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { |
| (<span class="kw-2">*</span><span class="ident">got</span> <span class="kw">as</span> <span class="ident">libc</span>::<span class="ident">c_int</span> <span class="op">&</span> <span class="ident">want</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> |
| } |
| <span class="macro">debug_detail</span><span class="macro">!</span>( |
| <span class="ident">EventsDetails</span>(<span class="ident">u32</span>), |
| <span class="ident">check_events</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLIN</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLPRI</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLOUT</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLRDNORM</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLRDBAND</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLWRNORM</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLWRBAND</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLMSG</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLERR</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLHUP</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLET</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLRDHUP</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLLONESHOT</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">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"solaris"</span>))]</span> |
| <span class="ident">libc</span>::<span class="ident">EPOLLEXCLUSIVE</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">"android"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>))]</span> |
| <span class="ident">libc</span>::<span class="ident">EPOLLWAKEUP</span>, |
| <span class="ident">libc</span>::<span class="ident">EPOLL_CLOEXEC</span>, |
| ); |
| |
| <span class="comment">// Can't reference fields in packed structures.</span> |
| <span class="kw">let</span> <span class="ident">e_u64</span> <span class="op">=</span> <span class="ident">event</span>.<span class="ident">u64</span>; |
| <span class="ident">f</span>.<span class="ident">debug_struct</span>(<span class="string">"epoll_event"</span>) |
| .<span class="ident">field</span>(<span class="string">"events"</span>, <span class="kw-2">&</span><span class="ident">EventsDetails</span>(<span class="ident">event</span>.<span class="ident">events</span>)) |
| .<span class="ident">field</span>(<span class="string">"u64"</span>, <span class="kw-2">&</span><span class="ident">e_u64</span>) |
| .<span class="ident">finish</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>)]</span> |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">assert_close_on_exec_flag</span>() { |
| <span class="comment">// This assertion need to be true for Selector::new.</span> |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">libc</span>::<span class="ident">O_CLOEXEC</span>, <span class="ident">libc</span>::<span class="ident">EPOLL_CLOEXEC</span>); |
| } |
| </pre></div> |
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