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98 lines
4.7 KiB
HTML
<!--$Id: db_set_feedback.so,v 10.16 2000/07/09 19:11:54 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_feedback</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_feedback</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_feedback(
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void (*db_feedback_fcn)(DB *dbp, int opcode, int pct));
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</pre></h3>
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<h1>Description</h1>
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<p>Some operations performed by the Berkeley DB library can take non-trivial
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amounts of time. The Db::set_feedback method can be used by
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applications to monitor progress within these operations.
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<p>When an operation is likely to take a long time, Berkeley DB will call the
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specified callback method. This method must be declared with
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three arguments: the first will be a reference to the enclosing database
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handle, the second a flag value, and the third the percent of the
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operation that has been completed, specified as an integer value between
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0 and 100. It is up to the callback method to display this
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information in an appropriate manner.
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<p>The <b>opcode</b> argument may take on any of the following values:
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<p><dl compact>
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<p><dt><a name="DB_UPGRADE">DB_UPGRADE</a><dd>The underlying database is being upgraded.
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<p><dt><a name="DB_VERIFY">DB_VERIFY</a><dd>The underlying database is being verified.
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</dl>
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<p>The Db::set_feedback 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_feedback 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/db_class.html">Db</a>
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<h1>See Also</h1>
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<a href="../api_cxx/db_close.html">Db::close</a>,
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<a href="../api_cxx/db_cursor.html">Db::cursor</a>,
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<a href="../api_cxx/db_del.html">Db::del</a>,
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<a href="../api_cxx/db_err.html">Db::err</a>,
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<a href="../api_cxx/db_fd.html">Db::fd</a>,
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<a href="../api_cxx/db_get.html">Db::get</a>,
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<a href="../api_cxx/db_get_byteswapped.html">Db::get_byteswapped</a>,
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<a href="../api_cxx/db_get_type.html">Db::get_type</a>,
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<a href="../api_cxx/db_join.html">Db::join</a>,
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<a href="../api_cxx/db_key_range.html">Db::key_range</a>,
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<a href="../api_cxx/db_open.html">Db::open</a>,
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<a href="../api_cxx/db_put.html">Db::put</a>,
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<a href="../api_cxx/db_remove.html">Db::remove</a>,
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<a href="../api_cxx/db_set_bt_compare.html">Db::set_bt_compare</a>,
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<a href="../api_cxx/db_set_bt_minkey.html">Db::set_bt_minkey</a>,
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<a href="../api_cxx/db_set_bt_prefix.html">Db::set_bt_prefix</a>,
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<a href="../api_cxx/db_set_cachesize.html">Db::set_cachesize</a>,
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<a href="../api_cxx/db_set_dup_compare.html">Db::set_dup_compare</a>,
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<a href="../api_cxx/db_set_errcall.html">Db::set_errcall</a>,
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<a href="../api_cxx/db_set_errfile.html">Db::set_errfile</a>,
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<a href="../api_cxx/db_set_errpfx.html">Db::set_errpfx</a>,
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<a href="../api_cxx/db_set_flags.html">Db::set_flags</a>,
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<a href="../api_cxx/db_set_h_ffactor.html">Db::set_h_ffactor</a>,
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<a href="../api_cxx/db_set_h_hash.html">Db::set_h_hash</a>,
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<a href="../api_cxx/db_set_h_nelem.html">Db::set_h_nelem</a>,
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<a href="../api_cxx/db_set_lorder.html">Db::set_lorder</a>,
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<a href="../api_cxx/db_set_malloc.html">Db::set_malloc</a>,
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<a href="../api_cxx/db_set_pagesize.html">Db::set_pagesize</a>,
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<a href="../api_cxx/db_set_paniccall.html">Db::set_paniccall</a>,
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<a href="../api_cxx/db_set_q_extentsize.html">Db::set_q_extentsize</a>,
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<a href="../api_cxx/db_set_realloc.html">Db::set_realloc</a>,
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<a href="../api_cxx/db_set_re_delim.html">Db::set_re_delim</a>,
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<a href="../api_cxx/db_set_re_len.html">Db::set_re_len</a>,
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<a href="../api_cxx/db_set_re_pad.html">Db::set_re_pad</a>,
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<a href="../api_cxx/db_set_re_source.html">Db::set_re_source</a>,
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<a href="../api_cxx/db_stat.html">Db::stat</a>,
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<a href="../api_cxx/db_sync.html">Db::sync</a>,
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<a href="../api_cxx/db_upgrade.html">Db::upgrade</a>
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and
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<a href="../api_cxx/db_verify.html">Db::verify</a>.
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</tt>
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<table><tr><td><br></td><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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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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