libdb/docs/api_reference/C/db_env_set_func_dirfree.html
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Berkeley DB Application Space Static Functions
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<h2 class="title" style="clear: both"><a id="db_env_set_func_dirfree"></a>db_env_set_func_dirfree</h2>
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<pre class="programlisting">#include &lt;db.h&gt;
int
db_env_set_func_dirfree(void (*func_dirfree)(char **namesp, int cnt)); </pre>
<p>
The Berkeley DB library requires the ability to return any memory
allocated as part of the routine which reads through a directory and
creates a list of files that the directory contains (see
<a class="xref" href="db_env_set_func_dirlist.html" title="db_env_set_func_dirlist">db_env_set_func_dirlist</a>).
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<p>
The <code class="function">db_env_set_func_dirfree()</code> function configures all operations performed
by a process and all of its threads of control, not operations
confined to a single database environment.
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<p>
Although the <code class="function">db_env_set_func_dirfree()</code> function may be called at any time
during the life of the application, it should normally be called
before making calls to the <a class="xref" href="envcreate.html" title="db_env_create">db_env_create</a> or
<a class="xref" href="dbcreate.html" title="db_create">db_create</a> methods.
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<p>
The <code class="function">db_env_set_func_dirfree()</code> <span>
function returns a non-zero error value on failure and 0 on success.
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<h4 class="title"><a id="idp63527288"></a>func_dirfree</h4>
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<p>
The <span class="bold"><strong>func_dirfree</strong></span> parameter is a
function which frees the memory returned from the
<a class="xref" href="db_env_set_func_dirlist.html" title="db_env_set_func_dirlist">db_env_set_func_dirlist</a>
function.
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<p>
The <span class="bold"><strong>namesp</strong></span> and <span class="bold"><strong>cnt</strong></span> parameters to this function are the same
values as were returned by the
<a class="xref" href="db_env_set_func_dirlist.html" title="db_env_set_func_dirlist">db_env_set_func_dirlist</a>
function.
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