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<title>Berkeley DB: DB_ENV->set_feedback</title>
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<h1>DB_ENV->set_feedback</h1>
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<h3><pre>
#include <db.h>
<p>
int
DB_ENV->set_feedback(DB_ENV *,
void (*db_feedback_fcn)(DB_ENV *, int opcode, int pct));
</pre></h3>
<h1>Description</h1>
<p>Some operations performed by the Berkeley DB library can take non-trivial
amounts of time. The DB_ENV->set_feedback method can be used by
applications to monitor progress within these operations.
<p>When an operation is likely to take a long time, Berkeley DB will call the
specified callback function. This function must be declared with
three arguments: the first will be a reference to the enclosing
environment, the second a flag value, and the third the percent of the
operation that has been completed, specified as an integer value between
0 and 100. It is up to the callback function to display this
information in an appropriate manner.
<p>The <b>opcode</b> argument may take on any of the following values:
<p><dl compact>
<p><dt><a name="DB_RECOVER">DB_RECOVER</a><dd>The environment is being recovered.
</dl>
<p>The DB_ENV->set_feedback interface may be called at any time during the life of
the application.
<p>The DB_ENV->set_feedback method returns a non-zero error value on failure and 0 on success.
<h1>Class</h1>
<a href="../../db4-devel-4.1.25/api_c/env_class.html">DB_ENV</a>
<h1>See Also</h1>
<a href="../../db4-devel-4.1.25/api_c/env_list.html">Database Environments and Related Methods</a>
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