libdb/docs/upgrading/upgrade_4_3_err.html
2011-09-13 13:44:24 -04:00

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<p>Library Version 11.2.5.2</p>
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<th colspan="3" align="center">DB_ENV-&gt;set_errcall, DB-&gt;set_errcall</th>
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<th width="60%" align="center">Chapter 7. Upgrading Berkeley DB 4.2 applications to Berkeley DB 4.3</th>
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<h2 class="title" style="clear: both"><a id="upgrade_4_3_err"></a>DB_ENV-&gt;set_errcall, DB-&gt;set_errcall</h2>
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<p>The signature of the error callback passed to the
<a href="../api_reference/C/envset_errcall.html" class="olink">DB_ENV-&gt;set_errcall()</a> and <a href="../api_reference/C/dbset_errcall.html" class="olink">DB-&gt;set_errcall()</a> methods has changed in
the 4.3 release. For example, if you previously had a function such as
this:</p>
<pre class="programlisting">void handle_db_error(const char *prefix, char *message);</pre>
<p>it should be changed to this:</p>
<pre class="programlisting">void handle_db_error(const DB_ENV *dbenv,
const char *prefix, const char *message);</pre>
<p>This change adds the <a href="../api_reference/C/env.html" class="olink">DB_ENV</a> handle to provide database
environment context for the callback function, and incidentally makes
it clear the message parameter cannot be changed by the callback.</p>
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