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Berkeley DB: DbEnv::set_feedback
DbEnv::set_feedback
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#include <db_cxx.h>
int
DbEnv::set_feedback(
void (*db_feedback_fcn)(DbEnv *dbenv, int opcode, int percent));
Description: DbEnv::set_feedback
Some operations performed by the Berkeley DB library can take non-trivial
amounts of time. The DbEnv::set_feedback method can be used by applications
to monitor progress within these operations. When an operation is
likely to take a long time, Berkeley DB will call the specified callback
function with progress information.
It is up to the callback function to display this information in an
appropriate manner.
The DbEnv::set_feedback method configures operations performed using the specified
DbEnv handle
The DbEnv::set_feedback method may be called at any time during the life of the
application.
The DbEnv::set_feedback 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.
Parameters
- db_feedback_fcn
- The db_feedback_fcn parameter is the application-specified
feedback function called to report Berkeley DB operation progress. The
callback function must take three parameters:
- dbenv
- The dbenv parameter is a reference to the enclosing database
environment.
- opcode
- The opcode parameter is an operation code. The opcode
parameter may take on any of the following values:
- DB_RECOVER
- The environment is being recovered.
- percent
- The percent parameter is the percent of the operation that has
been completed, specified as an integer value between 0 and 100.
Class
DbEnv
See Also
Database Environments and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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