2011-09-13 17:44:24 +00:00
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<title>Run-time configuration</title>
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<link rel="start" href="index.html" title="Berkeley DB Upgrade Guide" />
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<link rel="up" href="upgrade_4_7_toc.html" title="Chapter 3. Upgrading Berkeley DB 4.6 applications to Berkeley DB 4.7" />
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<div class="libver">
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2012-11-14 21:35:20 +00:00
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<p>Library Version 11.2.5.3</p>
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2011-09-13 17:44:24 +00:00
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Run-time configuration</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_4_7_toc.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 3. Upgrading Berkeley DB 4.6 applications to Berkeley DB 4.7</th>
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_4_7_rtc"></a>Run-time configuration</h2>
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</div>
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</div>
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</div>
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<p>In historic Berkeley DB releases, there were separate sleep and yield
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functions to be configured at run-time using the db_env_set_func_sleep
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and <a href="../api_reference/C/db_env_set_func_yield.html" class="olink">db_env_set_func_yield</a> functions. These functions have been
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merged in the Berkeley DB 4.7 release. The replacement function should always
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yield the processor, and optionally wait for some period of time before
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allowing the thread to run again.</p>
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<p>Applications using the Berkeley DB run-time configuration interfaces should
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merge the functionality of their sleep and yield functions into a single
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configuration function.</p>
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<p>In the 4.7 Berkeley DB release, the db_env_set_func_map and
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db_env_set_func_unmap functions have been replaced. This change fixes
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problems where applications using the Berkeley DB run-time configuration
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interfaces could not open multiple <a href="../api_reference/C/env.html" class="olink">DB_ENV class</a> handles for the same
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database environment in a single application or join existing database
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environments from within multiple processes.</p>
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<p>Applications wanting to replace the Berkeley DB region creation functionality
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should replace their db_env_set_func_map and db_env_set_func_unmap calls
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with a call to the <a href="../api_reference/C/db_env_set_func_region_map.html" class="olink">db_env_set_func_region_map</a> function.
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Applications wanting to replace the Berkeley DB region file mapping functionality
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should replace their db_env_set_func_map and db_env_set_func_unmap calls
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with a call to the <a href="../api_reference/C/db_env_set_func_file_map.html" class="olink">db_env_set_func_file_map</a> function.</p>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_4_7_toc.html">Prev</a> </td>
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<a accesskey="u" href="upgrade_4_7_toc.html">Up</a>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_4_7_repapi.html">Next</a></td>
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<td width="40%" align="left" valign="top">Chapter 3. Upgrading Berkeley DB 4.6 applications to Berkeley DB 4.7 </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Replication API</td>
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</tr>
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