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4.0 KiB
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<!--$Id: db_set_paniccall.so,v 10.11 2000/07/09 19:12:16 bostic Exp $-->
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<!--$Id: m4.errset,v 10.8 2000/02/19 20:57:57 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<!--All rights reserved.-->
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<html>
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<head>
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<title>Berkeley DB: Db::set_paniccall</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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</head>
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<body bgcolor=white>
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td>
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<h1>Db::set_paniccall</h1>
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</td>
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<td width="1%">
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<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<hr size=1 noshade>
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<tt>
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<h3><pre>
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#include <db_cxx.h>
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<p>
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int
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Db::set_paniccall(
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void (*db_paniccall_fcn)(DbEnv *dbenv, int errval));
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</pre></h3>
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<h1>Description</h1>
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<p>Errors can occur in the Berkeley DB library where the only solution is to shut
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down the application and run recovery. (For example, if Berkeley DB is unable
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to write log records to disk because there is insufficient disk space.)
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In these cases, when the C++ error model has been configured so that the
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individual Berkeley DB methods return error codes (see <a href="../api_cxx/except_class.html">DbException</a> for
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more information), the value <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> is returned by Berkeley DB
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methods.
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<p>In these cases, it is also often simpler to shut down the application when
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such errors occur rather than attempting to gracefully return up the stack.
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The Db::set_paniccall method is used to specify a method to be called when
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<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> is about to be returned from a Berkeley DB method. When
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called, the <b>dbenv</b> argument will be a reference to the current
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environment, and the <b>errval</b> argument is the error value that would
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have been returned to the calling method.
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<p>For <a href="../api_cxx/db_class.html">Db</a> handles opened inside of Berkeley DB environments, calling the
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Db::set_paniccall method affects the entire environment and is equivalent to calling
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the <a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a> method.
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<p>The Db::set_paniccall interface may be used to configure Berkeley DB at any time
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during the life of the application.
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<p>The Db::set_paniccall method either returns a non-zero error value or throws an exception that
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encapsulates a non-zero error value on failure, and returns 0 on success.
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<h3>Class</h3>
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<a href="../api_cxx/dbenv_class.html">DbEnv</a>
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<h1>See Also</h1>
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<a href="../api_cxx/env_close.html">DbEnv::close</a>,
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<a href="../api_cxx/env_open.html">DbEnv::open</a>,
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<a href="../api_cxx/env_remove.html">DbEnv::remove</a>,
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<a href="../api_cxx/db_err.html">DbEnv::err</a>,
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<a href="../api_cxx/env_strerror.html">DbEnv::strerror</a>,
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<a href="../api_cxx/env_version.html">DbEnv::version</a>,
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<a href="../api_cxx/env_set_cachesize.html">DbEnv::set_cachesize</a>,
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<a href="../api_cxx/env_set_errcall.html">DbEnv::set_errcall</a>,
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<a href="../api_cxx/env_set_errfile.html">DbEnv::set_errfile</a>,
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<a href="../api_cxx/env_set_error_stream.html">DbEnv::set_error_stream</a>,
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<a href="../api_cxx/env_set_errpfx.html">DbEnv::set_errpfx</a>,
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<a href="../api_cxx/env_set_flags.html">DbEnv::set_flags</a>,
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<a href="../api_cxx/env_set_mutexlocks.html">DbEnv::set_mutexlocks</a>,
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<a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a>,
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and
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<a href="../api_cxx/env_set_verbose.html">DbEnv::set_verbose</a>.
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</tt>
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<table><tr><td><br></td><td width="1%">
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