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<h2 class="title" style="clear: both"><a id="upgrade_4_0_lock"></a>lock_XXX</h2>
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<p>The C API for the Berkeley DB Locking subsystem was reworked in the 4.0
release as follows:</p>
<div class="informaltable">
<table border="1" width="80%">
<colgroup>
<col />
<col />
</colgroup>
<thead>
<tr>
<th>Historic functional interface</th>
<th>Berkeley DB 4.X method</th>
</tr>
</thead>
<tbody>
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<td>lock_detect</td>
<td>
<a href="../api_reference/C/lockdetect.html" class="olink">DB_ENV->lock_detect()</a>
</td>
</tr>
<tr>
<td>lock_get</td>
<td>
<a href="../api_reference/C/lockget.html" class="olink">DB_ENV->lock_get()</a>
</td>
</tr>
<tr>
<td>lock_id</td>
<td>
<a href="../api_reference/C/lockid.html" class="olink">DB_ENV->lock_id()</a>
</td>
</tr>
<tr>
<td>lock_put</td>
<td>
<a href="../api_reference/C/lockput.html" class="olink">DB_ENV->lock_put()</a>
</td>
</tr>
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<td>lock_stat</td>
<td>
<a href="../api_reference/C/lockstat.html" class="olink">DB_ENV->lock_stat()</a>
</td>
</tr>
<tr>
<td>lock_vec</td>
<td>
<a href="../api_reference/C/lockvec.html" class="olink">DB_ENV->lock_vec()</a>
</td>
</tr>
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<p>Applications calling any of these functions should update their calls
to use the enclosing <a href="../api_reference/C/env.html" class="olink">DB_ENV</a> handle's method (easily done as the
first argument to the existing call is the correct handle to use).</p>
<p>In addition, the <a href="../api_reference/C/lockstat.html" class="olink">DB_ENV->lock_stat()</a> call has been changed in the 4.0
release to take a flags argument. To leave their historic behavior
unchanged, applications should add a final argument of 0 to any calls
made to <a href="../api_reference/C/lockstat.html" class="olink">DB_ENV->lock_stat()</a>.</p>
<p>The C++ and Java APIs for the DbLock::put (DbLock.put) method was
reworked in the 4.0 release to make the lock put interface a method of
the <a href="../api_reference/C/env.html" class="olink">DB_ENV</a> handle rather than the DbLock handle. Applications
calling the DbLock::put or DbLock.put method should update their calls
to use the enclosing <a href="../api_reference/C/env.html" class="olink">DB_ENV</a> handle's method (easily done as the
first argument to the existing call is the correct handle to use).</p>
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