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<link title="Weak_hashtbl" rel="Chapter" href="Weak_hashtbl.html"><title>Persistent_singleton</title>
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<h1>Module <a href="type_Persistent_singleton.html">Persistent_singleton</a></h1>
<pre><span class="keyword">module</span> Persistent_singleton: <code class="code">sig</code> <a href="Persistent_singleton.html">..</a> <code class="code">end</code></pre><div class="info module top">
Implements a value that is either in a file, or in memory, but not both. Is used by
live and the friend to store sequence numbers and counters. If the value is moved to
memory, changed, and then the process crashes, the file will correctly reflect that
the value has been lost.<br>
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<pre><span id="VAL__pa_ounit_275876e34cf609db118f3d84b799a790"><span class="keyword">val</span> __pa_ounit_275876e34cf609db118f3d84b799a790</span> : <code class="type">string</code></pre><br>
Implements a value that is either in a file, or in memory, but not both. Is used by
live and the friend to store sequence numbers and counters. If the value is moved to
memory, changed, and then the process crashes, the file will correctly reflect that
the value has been lost.<br>
<pre><span class="keyword">module type</span> <a href="Persistent_singleton.Arg.html">Arg</a> = <code class="type">Core.Std.Sexpable</code></pre>
<pre><span class="keyword">module type</span> <a href="Persistent_singleton.S.html">S</a> = <code class="code">sig</code> <a href="Persistent_singleton.S.html">..</a> <code class="code">end</code></pre>
<pre><span class="keyword">module</span> <a href="Persistent_singleton.Make.html">Make</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">Z</code><code class="code"> : </code><code class="type"><a href="Persistent_singleton.Arg.html">Arg</a></code><code class="code">) -> </code><code class="code">sig</code> <a href="Persistent_singleton.Make.html">..</a> <code class="code">end</code></div></pre><br>
Implements a value that is either in a file, or in memory, but not both. Is used by
live and the friend to store sequence numbers and counters. If the value is moved to
memory, changed, and then the process crashes, the file will correctly reflect that
the value has been lost.<br>
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