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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Trace_subscriber (trace.Trace_subscriber)</title><meta charset="utf-8"/><link rel="stylesheet" href="../../_odoc-theme/odoc.css"/><meta name="generator" content="odoc 3.0.0"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body class="odoc"><nav class="odoc-nav"><a href="../index.html">Up</a> – <a href="../../index.html">Index</a> » <a href="../index.html">trace</a> » Trace_subscriber</nav><header class="odoc-preamble"><h1>Module <code><span>Trace_subscriber</span></code></h1><p>Generic subscribers.</p><p>This defines the notion of a <b>subscriber</b>, a set of callbacks for every trace event. It also defines a collector that needs to be installed for the subscriber(s) to be called.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.8</li></ul></header><div class="odoc-tocs"><nav class="odoc-toc odoc-local-toc"><ul><li><a href="#main-api">Main API</a></li></ul></nav></div><div class="odoc-content"><div class="odoc-spec"><div class="spec module anchored" id="module-Callbacks"><a href="#module-Callbacks" class="anchor"></a><code><span><span class="keyword">module</span> <a href="Callbacks/index.html">Callbacks</a></span><span> : <span class="keyword">sig</span> ... <span class="keyword">end</span></span></code></div><div class="spec-doc"><p>Callbacks used for subscribers.</p></div></div><div class="odoc-spec"><div class="spec module anchored" id="module-Subscriber"><a href="#module-Subscriber" class="anchor"></a><code><span><span class="keyword">module</span> <a href="Subscriber/index.html">Subscriber</a></span><span> : <span class="keyword">sig</span> ... <span class="keyword">end</span></span></code></div><div class="spec-doc"><p>Trace subscribers</p></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-user_data"><a href="#type-user_data" class="anchor"></a><code><span><span class="keyword">type</span> user_data</span><span> = </span></code><ol><li id="type-user_data.U_bool" class="def variant constructor anchored"><a href="#type-user_data.U_bool" class="anchor"></a><code><span>| </span><span><span class="constructor">U_bool</span> <span class="keyword">of</span> bool</span></code></li><li id="type-user_data.U_float" class="def variant constructor anchored"><a href="#type-user_data.U_float" class="anchor"></a><code><span>| </span><span><span class="constructor">U_float</span> <span class="keyword">of</span> float</span></code></li><li id="type-user_data.U_int" class="def variant constructor anchored"><a href="#type-user_data.U_int" class="anchor"></a><code><span>| </span><span><span class="constructor">U_int</span> <span class="keyword">of</span> int</span></code></li><li id="type-user_data.U_none" class="def variant constructor anchored"><a href="#type-user_data.U_none" class="anchor"></a><code><span>| </span><span><span class="constructor">U_none</span></span></code></li><li id="type-user_data.U_string" class="def variant constructor anchored"><a href="#type-user_data.U_string" class="anchor"></a><code><span>| </span><span><span class="constructor">U_string</span> <span class="keyword">of</span> string</span></code><div class="def-doc"><span class="comment-delim">(*</span><p>A non polymorphic-variant version of <a href="../Trace_core/index.html#type-user_data"><code>Trace_core.user_data</code></a></p><span class="comment-delim">*)</span></div></li></ol></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-flavor"><a href="#type-flavor" class="anchor"></a><code><span><span class="keyword">type</span> flavor</span><span> = </span></code><ol><li id="type-flavor.Sync" class="def variant constructor anchored"><a href="#type-flavor.Sync" class="anchor"></a><code><span>| </span><span><span class="constructor">Sync</span></span></code></li><li id="type-flavor.Async" class="def variant constructor anchored"><a href="#type-flavor.Async" class="anchor"></a><code><span>| </span><span><span class="constructor">Async</span></span></code><div class="def-doc"><span class="comment-delim">(*</span><p>A non polymorphic-variant version of <code>Trace_core.flavor</code></p><span class="comment-delim">*)</span></div></li></ol></div></div><h3 id="main-api"><a href="#main-api" class="anchor"></a>Main API</h3><div class="odoc-spec"><div class="spec type anchored" id="type-t"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> t</span><span> = <a href="Subscriber/index.html#type-t">Subscriber.t</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-collector"><a href="#val-collector" class="anchor"></a><code><span><span class="keyword">val</span> collector : <span><a href="#type-t">t</a> <span class="arrow">-></span></span> <a href="../Trace_core/index.html#type-collector">Trace_core.collector</a></span></code></div><div class="spec-doc"><p>A collector that calls the subscriber's callbacks.</p><p>It uses <code>mtime</code> (if available) to obtain timestamps.</p></div></div></div></body></html>
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