#include <db_cxx.h>

int
Db::set_feedback(
    void (*db_feedback_fcn)(DB *dbp, int opcode, int percent));

Description: Db::set_feedback

Some operations performed by the Berkeley DB library can take non-trivial amounts of time. The Db::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 Db::set_feedback method may be called at any time during the life of the application.

The Db::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:

db

The db parameter is a reference to the enclosing database.

opcode

The opcode parameter is an operation code. The opcode parameter may take on any of the following values:

DB_UPGRADE

The underlying database is being upgraded.

DB_VERIFY

The underlying database is being verified.

percent

The percent parameter is the percent of the operation that has been completed, specified as an integer value between 0 and 100.

Class

See Also