<!--$Id: db_set_feedback.so,v 10.16 2000/07/09 19:11:54 bostic Exp $--> <!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <html> <head> <title>Berkeley DB: DB->set_feedback</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table><tr valign=top> <td> <h1>DB->set_feedback</h1> </td> <td width="1%"> <a href="../api_c/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> #include <db.h> <p> int DB->set_feedback(DB *, void (*db_feedback_fcn)(DB *dbp, 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->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 database handle, 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_UPGRADE">DB_UPGRADE</a><dd>The underlying database is being upgraded. <p><dt><a name="DB_VERIFY">DB_VERIFY</a><dd>The underlying database is being verified. </dl> <p>The DB->set_feedback interface may be used to configure Berkeley DB at any time during the life of the application. <p>The DB->set_feedback function returns a non-zero error value on failure and 0 on success. <h1>See Also</h1> <a href="../api_c/db_create.html">db_create</a>, <a href="../api_c/db_close.html">DB->close</a>, <a href="../api_c/db_cursor.html">DB->cursor</a>, <a href="../api_c/db_del.html">DB->del</a>, <a href="../api_c/db_err.html">DB->err</a>, <a href="../api_c/db_fd.html">DB->fd</a>, <a href="../api_c/db_get.html">DB->get</a>, <a href="../api_c/db_get_byteswapped.html">DB->get_byteswapped</a>, <a href="../api_c/db_get_type.html">DB->get_type</a>, <a href="../api_c/db_join.html">DB->join</a>, <a href="../api_c/db_key_range.html">DB->key_range</a>, <a href="../api_c/db_open.html">DB->open</a>, <a href="../api_c/db_put.html">DB->put</a>, <a href="../api_c/db_remove.html">DB->remove</a>, <a href="../api_c/db_set_bt_compare.html">DB->set_bt_compare</a>, <a href="../api_c/db_set_bt_minkey.html">DB->set_bt_minkey</a>, <a href="../api_c/db_set_bt_prefix.html">DB->set_bt_prefix</a>, <a href="../api_c/db_set_cachesize.html">DB->set_cachesize</a>, <a href="../api_c/db_set_dup_compare.html">DB->set_dup_compare</a>, <a href="../api_c/db_set_errcall.html">DB->set_errcall</a>, <a href="../api_c/db_set_errfile.html">DB->set_errfile</a>, <a href="../api_c/db_set_errpfx.html">DB->set_errpfx</a>, <a href="../api_c/db_set_flags.html">DB->set_flags</a>, <a href="../api_c/db_set_h_ffactor.html">DB->set_h_ffactor</a>, <a href="../api_c/db_set_h_hash.html">DB->set_h_hash</a>, <a href="../api_c/db_set_h_nelem.html">DB->set_h_nelem</a>, <a href="../api_c/db_set_lorder.html">DB->set_lorder</a>, <a href="../api_c/db_set_malloc.html">DB->set_malloc</a>, <a href="../api_c/db_set_pagesize.html">DB->set_pagesize</a>, <a href="../api_c/db_set_paniccall.html">DB->set_paniccall</a>, <a href="../api_c/db_set_q_extentsize.html">DB->set_q_extentsize</a>, <a href="../api_c/db_set_realloc.html">DB->set_realloc</a>, <a href="../api_c/db_set_re_delim.html">DB->set_re_delim</a>, <a href="../api_c/db_set_re_len.html">DB->set_re_len</a>, <a href="../api_c/db_set_re_pad.html">DB->set_re_pad</a>, <a href="../api_c/db_set_re_source.html">DB->set_re_source</a>, <a href="../api_c/db_stat.html">DB->stat</a>, <a href="../api_c/db_sync.html">DB->sync</a>, <a href="../api_c/db_upgrade.html">DB->upgrade</a> and <a href="../api_c/db_verify.html">DB->verify</a>. </tt> <table><tr><td><br></td><td width="1%"> <a href="../api_c/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>