144 lines
6.8 KiB
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144 lines
6.8 KiB
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<h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>futures</a>::<wbr><a href='index.html'>executor</a>::<wbr><a class="fn" href=''>with_notify</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../../src/futures/task_impl/mod.rs.html#467-482' title='goto source code'>[src]</a></span></h1>
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<pre class='rust fn'>pub fn with_notify<F, T, R>(notify: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T, id: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> R <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> R,<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="../../futures/executor/struct.NotifyHandle.html" title="struct futures::executor::NotifyHandle">NotifyHandle</a>>, </span></pre><div class='docblock'><p>Sets the <code>NotifyHandle</code> of the current task for the duration of the provided
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closure.</p>
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<p>This function takes a type that can be converted into a notify handle,
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<code>notify</code> and <code>id</code>, and a closure <code>f</code>. The closure <code>f</code> will be executed such
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that calls to <code>task::current()</code> will store a reference to the notify handle
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provided, not the one previously in the environment.</p>
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<p>Note that calls to <code>task::current()</code> in the closure provided <em>will not</em> be
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equivalent to <code>task::current()</code> before this method is called. The two tasks
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returned will notify different handles, and the task handles pulled out
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during the duration of this closure will not notify the previous task. It's
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recommended that you call <code>task::current()</code> in some capacity before calling
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this function to ensure that calls to <code>task::current()</code> inside of this
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closure can transitively wake up the outer task.</p>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>This function will panic if it is called outside the context of a future's
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task. This is only valid to call once you've already entered a future via
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<code>Spawn::poll_*</code> functions.</p>
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