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        <p class='location'>Struct AtomicTask</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.register">register</a><a href="#method.register_task">register_task</a><a href="#method.notify">notify</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Default">Default</a><a href="#impl-Debug">Debug</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='../index.html'>futures</a>::<wbr><a href='index.html'>task</a></p><script>window.sidebarCurrent = {name: 'AtomicTask', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>futures</a>::<wbr><a href='index.html'>task</a>::<wbr><a class="struct" href=''>AtomicTask</a></span><span class='out-of-band'><span id='render-detail'>
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               </span><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#27-30' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'>pub struct AtomicTask { /* fields omitted */ }</pre><div class='docblock'><p>A synchronization primitive for task notification.</p>
<p><code>AtomicTask</code> will coordinate concurrent notifications with the consumer
potentially &quot;updating&quot; the underlying task to notify. This is useful in
scenarios where a computation completes in another thread and wants to
notify the consumer, but the consumer is in the process of being migrated to
a new logical task.</p>
<p>Consumers should call <code>register</code> before checking the result of a computation
and producers should call <code>notify</code> after producing the computation (this
differs from the usual <code>thread::park</code> pattern). It is also permitted for
<code>notify</code> to be called <strong>before</strong> <code>register</code>. This results in a no-op.</p>
<p>A single <code>AtomicTask</code> may be reused for any number of calls to <code>register</code> or
<code>notify</code>.</p>
<p><code>AtomicTask</code> does not provide any memory ordering guarantees, as such the
user should use caution and use other synchronization primitives to guard
the result of the underlying computation.</p>
</div>
                    <h2 id='methods' class='small-section-header'>
                      Methods<a href='#methods' class='anchor'></a>
                    </h2>
                <h3 id='impl' class='impl'><span class='in-band'><code>impl <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#137-279' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>pub fn <a href='#method.new' class='fnname'>new</a>() -&gt; <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#139-148' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Create an <code>AtomicTask</code> initialized with the given <code>Task</code></p>
</div><h4 id='method.register' class="method"><span id='register.v' class='invisible'><code>pub fn <a href='#method.register' class='fnname'>register</a>(&amp;self)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#153-155' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Registers the current task to be notified on calls to <code>notify</code>.</p>
<p>This is the same as calling <code>register_task</code> with <code>task::current()</code>.</p>
</div><h4 id='method.register_task' class="method"><span id='register_task.v' class='invisible'><code>pub fn <a href='#method.register_task' class='fnname'>register_task</a>(&amp;self, task: <a class="struct" href="../../futures/task/struct.Task.html" title="struct futures::task::Task">Task</a>)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#172-243' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Registers the provided task to be notified on calls to <code>notify</code>.</p>
<p>The new task will take place of any previous tasks that were registered
by previous calls to <code>register</code>. Any calls to <code>notify</code> that happen after
a call to <code>register</code> (as defined by the memory ordering rules), will
notify the <code>register</code> caller's task.</p>
<p>It is safe to call <code>register</code> with multiple other threads concurrently
calling <code>notify</code>. This will result in the <code>register</code> caller's current
task being notified once.</p>
<p>This function is safe to call concurrently, but this is generally a bad
idea. Concurrent calls to <code>register</code> will attempt to register different
tasks to be notified. One of the callers will win and have its task set,
but there is no guarantee as to which caller will succeed.</p>
</div><h4 id='method.notify' class="method"><span id='notify.v' class='invisible'><code>pub fn <a href='#method.notify' class='fnname'>notify</a>(&amp;self)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#248-278' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Notifies the task that last called <code>register</code>.</p>
<p>If <code>register</code> has not been called yet, then this does nothing.</p>
</div></div>
            <h2 id='implementations' class='small-section-header'>
              Trait Implementations<a href='#implementations' class='anchor'></a>
            </h2>
        <h3 id='impl-Default' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code><a href='#impl-Default' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#281-285' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.default' class="method"><span id='default.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default' class='fnname'>default</a>() -&gt; Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#282-284' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Returns the &quot;default value&quot; for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#287-291' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, fmt: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#288-290' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-Send' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code><a href='#impl-Send' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#293' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../../futures/task/struct.AtomicTask.html" title="struct futures::task::AtomicTask">AtomicTask</a></code><a href='#impl-Sync' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/futures/task_impl/atomic_task.rs.html#294' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'></div></section>
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