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        <p class='location'>Module task</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../index.html'>futures</a></p><script>window.sidebarCurrent = {name: 'task', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Module <a href='../index.html'>futures</a>::<wbr><a class="mod" href=''>task</a></span><span class='out-of-band'><span id='render-detail'>
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                       [<span class='inner'>&#x2212;</span>]
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               </span><a class='srclink' href='../../src/futures/task.rs.html#1-46' title='goto source code'>[src]</a></span></h1>
<div class='docblock'><p>Tasks used to drive a future computation</p>
<p>It's intended over time a particular operation (such as servicing an HTTP
request) will involve many futures. This entire operation, however, can be
thought of as one unit, as the entire result is essentially just moving
through one large state machine.</p>
<p>A &quot;task&quot; is the unit of abstraction for what is driving this state machine
and tree of futures forward. A task is used to poll futures and schedule
futures with, and has utilities for sharing data between tasks and handles
for notifying when a future is ready. Each task also has its own set of
task-local data generated by <code>task_local!</code>.</p>
<p>Note that libraries typically should not manage tasks themselves, but rather
leave that to event loops and other &quot;executors&quot; (see the <code>executor</code> module),
or by using the <code>wait</code> method to create and execute a task directly on the
current thread.</p>
<p>More information about the task model can be found <a href="https://tokio.rs/docs/going-deeper-futures/futures-model/">online at tokio.rs</a>.</p>
<h2 id="functions" class="section-header"><a href="#functions">Functions</a></h2>
<p>There is an important bare function in this module: <code>current</code>. The
<code>current</code> function returns a handle to the currently running task, panicking
if one isn't present. This handle is then used to later notify the task that
it's ready to make progress through the <code>Task::notify</code> method.</p>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.AtomicTask.html"
                                  title='struct futures::task::AtomicTask'>AtomicTask</a></td>
                           <td class='docblock-short'>
                                <p>A synchronization primitive for task notification.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.LocalKey.html"
                                  title='struct futures::task::LocalKey'>LocalKey</a></td>
                           <td class='docblock-short'>
                                <p>A key for task-local data stored in a future's task.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Task.html"
                                  title='struct futures::task::Task'>Task</a></td>
                           <td class='docblock-short'>
                                <p>A handle to a &quot;task&quot;, which represents a single lightweight &quot;thread&quot; of
execution driving a future to completion.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.UnparkEvent.html"
                                  title='struct futures::task::UnparkEvent'>UnparkEvent</a></td>
                           <td class='docblock-short'>
                               [<div class='stab deprecated'>Deprecated</div>] <p>A set insertion to trigger upon <code>unpark</code>.</p>

                           </td>
                       </tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table>
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                           <td><a class="trait" href="trait.EventSet.html"
                                  title='trait futures::task::EventSet'>EventSet</a></td>
                           <td class='docblock-short'>
                               [<div class='stab deprecated'>Deprecated</div>] <p>A concurrent set which allows for the insertion of <code>usize</code> values.</p>

                           </td>
                       </tr></table><h2 id='functions-1' class='section-header'><a href="#functions-1">Functions</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="fn" href="fn.current.html"
                                  title='fn futures::task::current'>current</a></td>
                           <td class='docblock-short'>
                                <p>Returns a handle to the current task to call <code>notify</code> at a later date.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="fn" href="fn.init.html"
                                  title='fn futures::task::init'>init</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
                           <td class='docblock-short'>
                                <p>Initialize the <code>futures</code> task system.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="fn" href="fn.with_unpark_event.html"
                                  title='fn futures::task::with_unpark_event'>with_unpark_event</a></td>
                           <td class='docblock-short'>
                               [<div class='stab deprecated'>Deprecated</div>] <p>For the duration of the given callback, add an &quot;unpark event&quot; to be
triggered when the task handle is used to unpark the task.</p>

                           </td>
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