 connection events from the operating system
for that socket.</p>
<p>Once the connect future is passed to <a href="../runtime/fn.run.html"><code>tokio::run</code></a>, it is spawned onto a
thread pool. The thread pool waits until it is notified that the connection
has completed.</p>
<p>When the TCP connection is established, the reactor receives an event from
the operating system. It then notifies the thread pool, telling it that the
connect future can complete. At this point, the thread pool will schedule
