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<!--$Id: env_set_feedback.so,v 10.19 2000/07/09 19:12:39 bostic Exp $-->
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<title>Berkeley DB: DBENV->set_feedback</title>
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<h1>DBENV->set_feedback</h1>
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<h3><pre>
#include <db.h>
<p>
int
DBENV->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 DBENV->set_feedback function 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 DBENV->set_feedback interface may be used to configure Berkeley DB at any time
during the life of the application.
<p>The DBENV->set_feedback function returns a non-zero error value on failure and 0 on success.
<h1>See Also</h1>
<a href="../api_c/env_close.html">DBENV->close</a>,
<a href="../api_c/env_create.html">db_env_create</a>,
<a href="../api_c/env_open.html">DBENV->open</a>,
<a href="../api_c/env_remove.html">DBENV->remove</a>,
<a href="../api_c/db_err.html">DBENV->err</a>,
<a href="../api_c/env_strerror.html">db_strerror</a>,
<a href="../api_c/env_version.html">db_version</a>,
<a href="../api_c/env_set_cachesize.html">DBENV->set_cachesize</a>,
<a href="../api_c/env_set_errcall.html">DBENV->set_errcall</a>,
<a href="../api_c/env_set_errfile.html">DBENV->set_errfile</a>,
<a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a>,
<a href="../api_c/env_set_flags.html">DBENV->set_flags</a>,
<a href="../api_c/env_set_mutexlocks.html">DBENV->set_mutexlocks</a>,
<a href="../api_c/env_set_paniccall.html">DBENV->set_paniccall</a>,
and
<a href="../api_c/env_set_verbose.html">DBENV->set_verbose</a>.
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