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<link title="Ipv6" rel="Chapter" href="Ipv6.html"><title>Ocamlnet 3 Reference Manual : Uq_engines.watchdog</title>
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<center><h1>Class <a href="type_Uq_engines.watchdog.html">Uq_engines.watchdog</a></h1></center>
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<pre><span name="TYPEwatchdog"><span class="keyword">class</span> watchdog</span> : <code class="type">float -> 'a #<a href="Uq_engines.engine-c.html">engine</a> -> </code><code class="type">[unit]</code> <code class="type"><a href="Uq_engines.engine-c.html">engine</a></code></pre>A watchdog engine checks whether the argument engine makes
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progress, and if there is no progress for the passed number of
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seconds, the engine is aborted, and the watchdog state changes
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to <code class="code">`Error Watchdog_timeout</code>.
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The current implementation is not very exact, and it may take
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a little longer than the passed period of inactivity until the
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watchdog recognizes inactivity.
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If the argument engine terminates, the watchdog changes its state to
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<code class="code">`Done ()</code>
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Important note: The watchdog assumes that the <code class="code">`Working</code> state
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of the target engine really counts events that indicate progress.
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This does not work for:<ul>
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<li><code class="code">poll_process_engine</code>: there is no way to check whether a subprocess
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<li><code class="code">connector</code>: It is usually not possible to reflect the progress
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<li><code class="code">listener</code>: It is usually not possible to reflect the progress
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