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<h1>Db::set_paniccall</h1>
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<h3><pre>
#include <db_cxx.h>
<p>
int
Db::set_paniccall(
void (*db_paniccall_fcn)(DbEnv *dbenv, int errval));
</pre></h3>
<h1>Description</h1>
<p>Errors can occur in the Berkeley DB library where the only solution is to shut
down the application and run recovery (for example, if Berkeley DB is unable
to allocate heap memory). In these cases, when the C++ error model has
been configured so that the individual Berkeley DB methods return error codes
(see <a href="../api_cxx/except_class.html">DbException</a> for more information), the value
<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> is returned by Berkeley DB methods.
<p>In these cases, it is also often simpler to shut down the application
when such errors occur rather than to try to gracefully return up the
stack. The <a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a> and Db::set_paniccall methods
are used to specify methods to be called when
<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> is about to be returned from a Berkeley DB interface.
When called, the <b>dbenv</b> argument will be a reference to the
current environment, and the <b>errval</b> argument is the error value
that would have been returned to the calling method.
<p>For <a href="../api_cxx/db_class.html">Db</a> handles opened inside of Berkeley DB environments, calling the
Db::set_paniccall method affects the entire environment and is equivalent to calling
the <a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a> method.
<p>The Db::set_paniccall interface may be called at any time during the life of
the application.
<p>The Db::set_paniccall method either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
<h1>Class</h1>
<a href="../api_cxx/db_class.html">Db</a>
<h1>See Also</h1>
<a href="../api_cxx/db_list.html">Databases and Related Methods</a>
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